Available Tankage Capacity

8/12/2019 Available Tankage Capacity

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CHAPTER SEVENTEEN

Available Tankage CapacityIn an export refinery, the estimates of the total tankage capacity

available for storage of various product groups are required for preparinginventory availability forecasts for product shipping. In single-ownershiprefineries, the entire tankage capacity is available to sustain the exportoperation. In joint-ownership refineries, the available tankage capacityfor every product group is split between the participants in the ratio oftheir equity in the refinery. Each participant then uses its share of tankagecapacity to hold its inventory for its product shipping.The procedure for estimating the total available tankage capacity andits allocation to the participants is described in this chapter.Each participant must maintain its product inventory levels within thestorage capacity allocated to it. The tankage capacity allocation is neces-sary to prepare inventory forecasts of the participants, which is discussedin later chapters.

ESTIMATION OF TOTAL AVAILABLE CAPACITYThe procedure for estimating the total available tankage capacity for aproduct group is as follows:1. All available tanks in the given product group service are listed.

Only tanks in service for the given product group are considered.The tanks in service of a given product g roup keep changing. Everytime a tank goes out of service for scheduled or unscheduledmaintenance or a new tank is added in the service of a given productgroup, the tankage list must be updated.


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2. Tanks in service in each group are listed along with the following data:Maximum gross volume (the physical volume of the tank).Maximum net volume (the total gross volume multiplied by a factorto compute the maximum net for a group).W orking ullage (the space required in tanks for operational reasons,such as correcting tank com position or disengaging vapors; a work-ing ullage is specified for a group of tanks).Minimum heel (the volume of tank below minimum gauge).Available working stock (the volume above the minimum gauge toprovide suction head to the pump transferring products from the tank).

MINIMUM AND MAX IMUM INVENTORY (LI AND HI)Each tank has some dead storage volume, which is necessary toseparate any solid entrainment and water and so forth. This inventory orholdup is not available for export but, nevertheless, is necessary foroperation of the tank. The total minimum inventory volume, which mustbe maintained for operational reasons, is termed LI. A tank LI is calcu-lated as follows:Ll = R S

whereR is the minimum heel and S is the available working stock.The tank volume between the operational maximum level and tank'sphysical volume is termed HI. This volume is used to correct the tankblend composition, if so required. A tank HI is calculated as follows:HI = P - Q

wherePis the maximum net volume of tank and Qis the working ullage.

T NK GE C P CITY V IL BLE FOR PRODUCT STOR GEThe tank volume between LI and H I is actually available for storage ofthe products. Therefore,Available capacity = HILI


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PRODUCT GROUPSRefinery product grades are combined into groups. For example, alllight naphtha grades with a specific range of density, RV P, or distillation

specifications constitute the LSR group, and the different grades ofgasolines come under the gasoline group. A typical refinery might groupproducts as follows:GROUP PRODUCTLSR LIGHT NAPHTHASWSR WHOLE RANGE NAPHTHASKEROSENE KERO SENE/JET FUELSDIESEL AUTO MO TIVE DIESELSBDSL BLACK OR MARINE DIESELSHVGO HEAVY VACUUM GAS OILSFO FUEL OILSASPHALT ASPHALT GRADES

ALLOCATION OF TANKAGE CAPACITYIn joint-ownership refineries, HI and LI are computed for every groupof tanks, and the HI and LI for the group are split in the ratio of theparticipants' equity in the refinery.

EXAMPLE 17-1In a joint-ownership refinery, participant AO C has a 60 share andparticipant BO C has 40 share. The tanks in service for each productgroup and the tank data are shown in Tables 17-1 to 17-10. Estimate thetankage capacity available to each participant.The solution isParticipant AOC equity in refinery = 40

Participant BOC equity = 60A summ ary of HI and LI is made from the tankage data. The HI and LIare split in the ratio of the participants' equity. The capacity available to


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Table17-2Light Naphtha GroupTanks

WM I N I M U MHEEL(5)R

MAX.NETW ORKINGINVENTORY

(4)H I = P-O

W ORKINGULLAGE(3 )Q

M X I M U MNET(2)P=Ox0.9766

M X I M U MGROSS(1)OANK NO.

2.0002.0002.0002.0002.000

20.00021.00022.00073.00054.5150.000

18.55513.67211.71911.71918.555

186.531182.624161.139604.515

1914121219191

187165619

356457459460476944945946TOTALNOTES:LI IS MINIMUMNET WORKIN G ULLAGE.H IISM AXIMUMNET WORKIN G INVEN TORY.CALCULATION-CALCULATETHE TOTALHI AND LI FOR EACH PRODUCT GROUP.THE CALCULATIONSOF HI AND LIPRESENTED HE RE A RE SELF-EXPLANATORYALL FIGURES AREINTHOUSAND BARRELS.ONLY TANKSINSERVICE ARE CONSIDEREDFOR COMPUTATIONOF HI AND LMAXIMUMNET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING WITAND THIS FACTORIS 97.66 FOR THE GROUPLSR.COLUMNS4 AND 7 SHOWHI AND LI COMPUTATIONS.


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Table17-3W h oleRange Naphtha GroupTank

M I N I M U MHEEL(5)R

MAX.NET W ORKINGINVENTORY

(4)H I =P-Q

W ORKINGULLAGE(3)

M X I M U MNET(2)P=Ox 0.9766


41.00035.00016.00092.00051.000

1057.739568.071

80.00055.000

514.668505.879117.192

1137.739623.071

527518120

1165638

965760925TOTAL1TOTAL2NOTES:LI ISMINIMUM NET WORKING ULLAGE.HIISMAXIMUM NET WORKING INVENTORY.CALCULATION:CALCULATE THE TOTAL HI ANDLIFOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI ANDLIPRESENTED HERE ARE SELF-EXPLANATORY.ALLFIGURESARE IN THOUSAND BARRELS.TANK965 ALLOCATED FOR PARTICIPANT BOC USAGE ONLY.ONLYTANKSINSERVICE ARE CONSIDERED FOR COMPUTATION OF HI ANDLI.MAXIMUM NET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING WITHAFACTANDTHIS FACTOR IS 97.66 FOR THE GROUP WSR.COLUMNS4AND7SHOW HI ANDLICOMPUTATIONS.TOTAL 1 INCLUDES TANK 965 CAPACITY.TOTAL2 EXCLUDES TANK 965 CAPACITY.


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Table17-4Gasoline GroupTanks


M XNET W ORKINGINVENTORY(4)H I = P-Q

W ORKINGULLAGE

(3)

M X I M U MNET(2)

P=Ox 0.9570


6.0001.0001.0001.000

16.00016.0009.00017.000

16.00016.00015.00015.00015.000

144.00076.50725.000

30.62411.4846.6996.699

120.582121.539111.969115.797116.754110.055117.711115.797115.797

1101.507

321277

126127117121122115123121121

1151

129250469470710905906915916924933934935TOTAL

NOTES: LI IS MINIMUMNET WORKING ULLAGE.HIIS M A X I M U MNET WORKING INVENTORY.CALCULATION:CALCULATE THE TOTAL HI AND LI FOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI AND LI PRESENTED HERE ARE SELF-EXPLANATORY.ALL FIGURES ARE IN THOUSAND BARRELS.ONLYTANKS IN SERVICE ARE CONSIDERED FOR COMPUTATION OF HI AND LI.COLUMNS 4 AND 7 SHOW HI AND LI COMPUTATIONS.


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Table17-5Kerosene GroupTanks


MAX.NET W ORKINGINVENTORY(4)

H I = P-Q

W ORKINGULLAGE(3)Q

M X I M U MNET(2)P=Ox 0.9821


10.00015.00016.00016.00021.00055.00011.00011.000

155.00004.23880.000

86.42573.65882.496

121.780131.601440.96371.69375.622

1084.238

887584

1241344497377

1104

105114115730740751901902TOTALNOTES: LIIS MINIMUMNET WORKING ULLAGE.HIIS M A X I M U MNET WORKING INVENTORY.CALCULATIONCALCULATETHE TOTAL HI ANDLIFOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI AND LI PRESENTED HERE ARE SELF-EXPLANATORY.ALLHGURESARE IN THOUSAND BARRELS.ONLYTANKS IN SERVICE ARE CONSIDERED FOR COMPUTATION OF HI ANDLI.MAXIMUM NET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING WITHAFACANDTHIS FACTOR IS 98.21 FOR THE GROUP KERO.COLUMNS4AND7SHOW HI ANDLICOMPUTATIONS.


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Table17-6Automotive DieselGroupTanks

M I N I M UHEEL

(5 )R

M XNET W ORKING

INVENTORY(4)H I = P-Q

W ORKINGULLAGE

(3 )Q

M X I M U MNET(2 )P=Ox0.9801

M X I M U MGROSS(1)OANKN O.

3.0003.0008.0003.0003.0003.0003.0002.0003.0003.0000.2001.0000.0000.0000.000

35.200438.91140.000

122.513123.493591.980122.513121.532128.393120.55283.309123.493

123.4936.8613.9200.9804.9010.980

1678.911

12512660412512413112385126

12674151

1713

701702706711721722731732913923452455

41910917TOTALNOTES: LIIS MINIMUMNET WORKING ULLAGE.H IIS MAXIMUMNET WORKING INVENTORY.CALCULATION-C LCUL TETHE TOTAL HI ANDLIFOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI ANDLI PRESENTED HERE ARE SELF-EXPLANATORY.ALL FIGURES ARE IN THOUSAND BARRELS.ONLYTANKS IN SERVICE ARE CONSIDERED FOR COMPUTATION OF HI ANDLI.MAXIMUM NET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING WITHAFACTOR, AND TCOLUMNS4AND7 SHOWHIANDLICOMPUTATIONS.


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Table17-7Blackor Marine Diesel Group TankM I N I M U M

HEEL(5 )R

M XNET W ORKINGINVENTORY(4)

H I = P-Q

W ORKINGULLAGE(3 )Q

MAXIMUMNET(2)P=O x0.9842

M X I M U MGROSS(1)OANKN O.

1.0001.0002.558.000

27.55827.558

2828

912TOTALNOTES:LI IS MINIMUMN ET W ORK ING ULLAGE. ISMAXIMUMN ET W ORK ING INVENTORY.CALCULATION:CALCULATE THE TOTALHI AND LIFOR EACH PRODUCT GROUP.THECALCULATIONSOFHIAND LIPRESENTED BELOWARE SELF EXPLANATORY.ALL HGURES AREIN THOUSAND BARRELS.ONLY TANKS IN SERVICE ARE CONSIDERED FOR COMPUTATION OF HIAND LI.MAXIMUMNET IS COMPUTED FROM MAXIMUM GROSSBY MULTIPLYING W ITHAFACAND THIS FACTORIS 98.42 FOR THE GROUP BDSL.COLUMNS4 AND 7 SHOWHI AND LICOMPUTATIONS.


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Table 17-8Heavy Vacuum Gas Oil (HVGO) GroupT


M XNET W ORKINGINVENTORY(4)

H I =P-Q

W ORKINGULLAGE(3)

M X I M U MNET(2)

P= Ox0.9577

M X I M U MGROSS(1)O

TANKN O.4.0008.000

12.00011.1240.00086.193544.931

631.12490569

659111705TOTALNOTES:UIS MINIMUMN ET W ORKING ULLAGE. IS MAXIMUMN ET W ORK ING INVENTORY.CALCULATION:CALCULATE THE TOTAL HI AND LI FOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI AND LI PRESENTED HERE ARE SELF-EXPLANATORY.ALL FIGURES ARE INTHOUSANDBARRELS.ONLY TANKS IN SERVICE ARE CONSIDERED FOR COMPUTATION OF HI AND LI.MAXIMUM NET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING W ITHAFACTAND THIS FACTOR IS 95.77 FOR THE GROUP HVGO.COLUMNS4 AND7 SHOW HI AND LI COMPUTATIONS.


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Table17-9Fuel Oil GroupTanksM I N I M U M

HEEL(5)R

MAX.NET W ORKING

INVENTORY(4)H I =P-Q

W ORKINGULLAGE(3)

M X I M U MNET(2)P=Ox0.9725

M X I M U MGROSS(1 )

OTANK NO.COL NO.

3.0003.0002.0006.0003.0003.0005.0006.0002.0003.000

36.000263.37850.000

118.645119.61881.690

323.843117.673119.618202.280319.953

86.553123.508

1613.378

12212384

333121123208329

89127

1659

703713714715723724734743904914TOTALNOTES:LI IS MINIMUMNETWORKIN G ULLAGE.H IISM AXIMUMNETWORKING INVENTORY.CALCULATION-CALCULATETHE TOTAL HI ANDLIFOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI ANDLIPRESENTED HERE ARE SELF-EXPLANATORY.ALL FIGURES ARE IN THOUSAND BARRELS.ONLYTANKSINSERVICE ARE CONSIDERED FOR COMPUTATION OF HI ANDLI.MAXIMUM NETISCOMPUTED FROM MAXIMUM GROSSBYMULTIPLYING WITHAFACTOR,COLUMNS4AND7SHOW HI AND LI COMPUTATIONS.


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Table17-10Asphalt GroupTanks

M I N I M UHEEL(5)

R

MAX.W ORKING(ENTORY(4)\i=p-Q

WORKINGNETULLAGE IN\

3)Q H

MAXIMUMNET2)

=0x0.9523

MAXIMUMGROSS

1) PANK NO.

0.4000.2000.2000.3000.4000.2000.3000.3002.3001.8980.000

13.3325.7145.714

12.38013.3325.714

14.28511.42881.898

1466

1314151286

180171172181183170907908TOTALNOTES:LIISM I NI M UMNET WORKING ULLAGE.H IISMAXIMUMNET WORKING INVENTORY.CALCULATION:CALCULATE THE TOTAL HI ANDLIFOR EACH PRODUCT GROUP.THE CALCULATIONS OF HI ANDLIPRESENTED HERE ARE SELF-EXPLANATORY.ALLFIGURES ARE IN THOUSAND BARRELS.ONLYTANKSINSERVICE ARE CONSIDERED FOR COMPUTATION OF HI ANDLI.MAXIMUMNET IS COMPUTED FROM MAXIMUM GROSS BY MULTIPLYING WITHAFACANDTHIS FACTOR IS 95.23 FOR THE GROUP ASPH.COLUMNS AND7SHOW HI ANDLICOMPUTATIONS.


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each participant is the difference between HI and LI for every productgroup. These calculations are shown in Table 17-11.ULLAGE

Ullage is the difference between HI and the actual inventory volume ina tank. Such data are important for scheduling the product offloading andthe size of individual shipments.TANK OW NED BY ONE PARTICIPANT

In joint-ownership refineries, a participant may build a tank exclu-sively for its own use. The capacity allocation procedure, in that case, ismodified as follows:1. Calculate the HI and LI for the group, including the exclusive tankas a part of the group.2. Calculate the HI and LI for the group , assuming the tankisexcluded.3 . The delta between the two HI and LI gives HI and LI for theexclusive tank.4. Next HI and LI corresponding to calculations w ithout the exclusivetank are used to allocate tankage capacity.5. HI and LI of the exclusive tank are added to HI and LI of theparticipant for whose use the exclusive tank was provided.

EXAMPLE 17-2Consider Tank 965 (Table 17-3), a W SR (naphtha) group tank built forthe exclusive use of participant BO C. The calculation of LI and HI for thetwo participants follows:

LI, mb HI, mbTOTAL EXCLUDING TANK 965 81 568TOTAL INCLUDING TANK 965 142 1058ESTIMATE FOR TANK 965 61 490AOC ALLOCATION = 0 . 6 x 8 1 = 568 x 0.6

= 48.6 =3 40 .8BOC ALLOCATION =81x 0.4 +61 = 568 x 0.4 + 490

= 93 .4 =7 17.2


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Table17-11AllocationofAvailableTankage Capacity Al lFigures

ALLAVAILABLECAPACITY

ALLOCATIONAOC

6=1xBOC

5=3x0.4)AOC

4=3x0.6)

REFINERYAVAILABLECAPACITY3=2-1)

TOTALH I2)

TOTALLId )PRODUCTGROUP

27485

179213126

425

1848

4173366191220492

7228383

19

7259550287329737

10341574

29

11432916478549

122917

569957

48

15555

1058904

143923

6111263

62

4123142299355210

642

30614

LPGLSRWSRGASOLINEKEROSENEDIESELBLACK DIESELHVGOFUEL OILASPHALT

CE BETWEEN ITS HI ANOTE: AVAILABLE CAPACITY FOR ANY PRODUCT GROUP IS THE DIFFEREl^RATIO OF THEIR EQUITY; IN THIS EXAMPLE, 60/40.


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CEDING OF REFINERY CAPACITYCeding is a situation in which one participant in the joint refinerychooses not to utilize its full share of refinery capacity for a prolongedperiod. In such a situation, it has the option to offer the unutilizedcapacity to the other participant. If the other participant agrees to acceptthe unutilized capacity, the receiving participant has to pay agreed-oncharges to the leasing participant to compensate it for the depreciation ofits assets and amortization of its investment in the refinery. If a partici-pant leases part of unutilized processing unit capacity, the tankage cap-acity is also ceded to the receiving participant in that proportion.Consider, for example, a refinery with crude running capacity at260 mbpcd. The capacity rights of AOC and BOC are 60/40. The crudedistillation unit capacity is split as follows:AOC capacity share, CDU = 156mbpcdBOC capacity share, CDU = 104mbpcdIf BOC w ishes to run on ly, say, 40 mbpcd for a prolonged period, BOCcan cede (104 40) = 64 mbpcd of its unutilized refining capacity. IfAOC accepts this ceded capacity, its capacity would be(156 + 64) = 220 mbpcd and B O C s refining capacity would be 40 mbpcdduring the period of ceding. The capacity of the downstream units cededunder the ceding agreement would equal (64/260) or 0.2461 times thedownstream unit capacity, as shown in Table 17-12.

CEDING OF TANKAGE CAPACITYThe procedure for ceding tankage capacity follows the principle ofceding unit capacities. In the preceding example, the ceded tankagecapacity in every product group is (64/260) of available tankage capacity.After ceding, the split of available tankage capacity is as follows:

PARTICIPANT BEFORE CEDING AFTER CEDINGAOC 0.6000 0.8461BOC 0.4000 0.1539TOTAL 1.0000 1.0000


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Table 17-12Ceded Downstream Unit Capacities in mbpcd )

UNITCRUDEDISTILLATIONFCCUHYDROCRACKERVISBREAKERCAT REFORMERDIESEL HDS

ITOTAL260.0

36.050.020.015.020.0

AOCBEFORECEDING

15621.630.012.0

9.012.0

BOCBEFORECEDING

10414.420.0

8.06.08.0

CEDED64

8.912.34 .93.74.9

AOCAFTERCEDING

22030.542.316.912.716.9

BOCAFTERCEDING

405.57.73.12.33.1

NOTES: AOC CRUDE DISTILLATION UNIT (CDU) C A PA C IT Y -6 0 AND BOC CDUCAPACITY=40 TOTAL REFINERY CDU CAPACITY WITHOUT CEDING. CEDING OFDOWNSTREAM UNITS = (CDU CE DED CA PACITY)/(TOTAL CDU CAPACITY) x (UNITTOTALCAPACITY).

The split of total HI and LI for every group tankage is done in thisratio. Tankage capacity available to participants after ceding is shown inTable 17-13.It is important to analyze the effect of tankage ceding on the oper-ability of participant BOCs part of the refinery. Depending on the sizeand frequency of lifting, m inimum u llage equal to about 17 days produc-tion is required. Referring to Table 17-14, the available storage capacity

Table 17-13Tankage Situation under Ced ing in mb)GROUPLPGLSRWSRGASOKERODSLBDSLHVGOFUELASPHTOTAL

TOTALLI

4123142299355210

642

30614

1501

A O CLI

3104120253300178

536

25912

1270

B O CLI

119224655321

647

2231

TOTALHI

15555

1058111904

143923

61 11263

626707

A O CHI

1347089565 776 5

121819

5171069

525675

B O CHI

285

163120139221

494

19410

1032

TOTALCAPACITY

11432916478549

122917

569957

485206

A O CCAPACITY

936677 5404465

104014

481810

414405

B O CCAPACITY

266

1417484

1893

88147

7801


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Table17-14Effectof Tankage Ceding on Refinery Operability

PRODUCTGROUPLPGLSRWSRGASOKERODSLBDSLHVGOFUELASPHTOTAL

BOCAVAILS,

mb1)1 7

66 5140 973 584 5

189 12 6

87 5147 2

7 4800 9

BOCPROD. RATEmb2)

05 45 83 5

613 30 2

07 91 5

43 6

AVAILABLEULLAGEdays3 = 1/2)12 324 321 014 114 213 1

18 64 9

18 4

REQUIREDULLAGE,mb 4=2x17)

091 898 659 5102

226 13 4

0134 325 5741

ULLAGESHORTFALL,mb 5 = 4 - 1 ) 1 725 3

4 2 3 1 4 0

17 537 00 8

8 7 5 1 2 9

18 1

NOTES: (1) AVAILABLE CAPACITY (HI - LI) IS FROM THIS TABLE.(2) APPROXIMATE YIELD PATTERN FROM PARTICIPANT BOC UNIT CAPACITIES AFTER CEDING.(3) NUMBER OF DAYS OF ULLAGE FROM RATED PRODUCTION.(4) VOLUME REQUIRED TO CONTAIN 17 DAYS OF RATED PRODUCTION.(5) POSITIVE HGURES INDICATE SHORTFALLS AND NEGATIVE HGURES DENOTE SURPLUS IN

ULLAGE, COL 5 = COL 4 - COL 1.

after ceding, in certain product groups is less than the m inimum required,while in some others, the available tankage capacity is more than thatrequired for operational reasons. Therefore, tankage capacity would haveto be rationalized by switching tanks from one product group to anotherin such a manner that every product group has a minimum ullage equal to17 days of its estimated production rate after ceding.


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CHAPTER EIGHTEEN

Shipping Inventory ForecastsTo plan shipment of products and to schedule such shipments, themarketing department needs to know estimates of each product group'sproduction rate and the inventory available for shipping. This information

is required several weeks in advance of the actual shipment, for productsale and chartering vessels to transport products. Also, it is important tomaintain the inventory level of each product group within the ullageavailable to the group in the refinery tankage. This is done by timelytransport of products from the refinery tanks. Failure of timely off-takecan cause a crisis situation in the refinery, forcing cutdown of crudethroughput, shutdown or feed reduction in some downstream units, ordumping distillates into fuel oil.To provide the marketing department with an accurate inventory fore-cast of all product g roups, every week, the refinery estimates the produc-tion rate of each product group and uses these to revise the inventoryforecasts for the remaining period of the month

WEEKLY PRODUCTION ESTIMATESThese estimates are done with a spreadsheet refinery model. Herevarious parameters, such as unit operating modes and blend components,can be controlled more closely than in a linear programming (LP) model,which may require a major modeling effort to reflect the actual refinerysituations. The information on the feed rates, operation modes of the

units, product blending, and tank inventory levels can be constantlyupdated, and thus these hand estimates are more realistic than the LPsolutions, which are price driven.Every week the product requirements are revised and a new estimateprepared for the remaining period of the month, incorporating the latest


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For the first estimate, the crude run and product grades to be m ade areas per the combined definitive operating plans (DOPs) of the participants.For the second estimate, the crude run is equal to the total DO P crude runminus the crude processed during the first 10 days of the month. Theproduct target for the second estimate is the combined DOPs, plus anyDOP revisions by the participants m inus the product already m ade duringthe first period. Sim ilarly, the targets for the third and fourth estimates arethe parts of products still to be made.

PROCEDURESINGLE-OWNERSHIP REFINERIES

The procedure for establishing production rates in single-ownershiprefineries is straightforward. This consists of updating the refineryspreadsheet model with the latest data on available unit capacities, cruderun rate, product blending, and the like. The model is run to establishrefinery input and output balance. Refinery production rate estimate isused as a basis for inventory forecasts of various product groups.

JOINT-OWNERSHIP REFINERIESThe procedure for establishing production rates in joint-ownership

refineries is more complex and described in detail. Here, not only therefinery production rate is established but also the production rate forevery product group is split between the participants to establish separateinventory forecasts for the two participants. Here again, the refineryspreadsheet model is used to estimate the refinery production rate.Participants' submitted DOPs form the basis for splitting refineryproduction in a given period. This rough allocation is used to prepareestimates of inventory available to each participant for shipping its

product.At the start of every month, the refinery receives DOPs from both theparticipants, which list information about the crude throughput and theproduct slate of each participant. Based on this information, the refinerymakes its own estimates of production of various products during themonth.


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ALLOCATION OF DELTASThe delta between the combined DOPs of the participants and therefinery estimates, as per spreadsheet program, for each product group

is examined to determine the cause of that delta and delta assigned to theparticipant that caused the delta. If no particular reason can be identified,the delta is allocated to the participants in the ratio of their crude run.Production of a participant is the sum of its DOP plus the allocated deltaas follows:Participant production = participant DOP + deltaThe production rate is worked out by dividing the participant's produc-tion by the num ber of days for w hich the estimates are m ade. In this way,the production and thus production rate estimate of the refinery during theweek is split between each partic ipan t's production rate for every productgroup.For the allocation of deltas for various product grades, the concept of

pseudoequivalencies is used, based on how the product is blended in therefinery. Pseudoequivalency is in terms of other product grades andprocess stocks. Important differences from the equivalencies used forproduct allocation are as follows: Pseudoequivalency is used here for the sole purpose of estimatingthe production rate in terms of balancing grades and process stocks

instead of only in terms of balancing grades for equivalencies used inproduct allocation. As the sole purpose of these equivalencies is to investiga te the effecton product grades inventories any effect on process stocks isignored.The following examples should clarify the use of these pseudoequiva-

lencies.WSR NAPHTHA)

The production of WSR in an estimate was85mb m ore than that listedin the combined DOPs. As no cause could be found for this additional


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production, this is allocated to the participants in the ratio of each one'scrude run as follows:DOP, ESTIMATES, DELTA, CRUDE

PARTICIPANT mb mb mb RATIOAOC 839 71 0.8354BO C 96 14 0.1646TOTA L 935 1020 85 1.0000

GASOLINE GROUP DELTASAfter an estimate, the total gasoline group delta between estimates andthe DOPs was estimated as follows:

GRADE DELTA, mb1-387 251-390 241-395 0I-397L -105I-397LL 30T O T A L G R O U P - 1 6

The cause of delta for certain grades could be identified, while forother grades, it could not be ascertained. In this case, delta is firstallocated for grades for which the cause is known; the remaining deltais allocated to the participants in the ratio of their crude run.Gasoline Grade 397L

The delta between I-397L production and the combined DOPs is 105mb. This delta is split between the participants in the ratio of theircrude run:

PARTICIPANT CRUDE RATIO DELTA, mbAOC 0.8354 - 8 8BOC 0.1646 - 1 7TOTAL 1.0000 - 1 0 5


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The I-397L blend contains 25 reformate (RON 95). Therefore, a -8 8production change releases 22 mb reformate for AO C. Hence, A O C sgasoline allotment decreases by 22 mb while the reformate pool increasesby the same amount. Similarly, B O C s gasoline pool decreases by 4 mband the reformate pool increases by the same amount, as follows:

STOCK AO C, mb BOC , mbI-397L - 2 2 - 4REFORM ATE (RON 95) 22 4TOTAL O O

Gasoline Grade I-397LLThis grade is blended with 47 reformate and is made only for BO C.Extra production of 30 mb contains approximately 14mb reformate,increasing the gasoline pool by that amount:

STOCK AO C, mb BOC, mbI-397LL O 14REFORMATE (95RON) O - 1 4TOTAL O O

The remaining delta = 16 (224 + 1 4 ) or 4mb, which isallocated to the participants in their crude run ratio:A OC = - 3 m bBOC = lmb

AOC total delta = ( - 2 2 - 3) = - 2 5 mbBOC total delta = ( - 4 + 14 - 1) = 9mb

F U E L OILEstimates show that production of 1-961 (80cst) for AOC was32 mb m ore than the D OP estim ates. The effect of this delta on fuel


25/61

and diesel pools was determined as follows. The refinery blends thislow viscosity fuel oil by cutting normal 1-961 grade with 1-888 dieselas follows:

VISCOSITYGRADE PRODUCT VOLUM E, mb BLEND INDEX1-961 FU E L O IL 27.8 4601-888 DIESEL 4.2 - 3 01-961 (80 cst) F U E L O IL 32.0 398

Production of an additional 32 mb 1-961 (80 cst) for AOC increases itsfuel oil by (32 - 27.8) or 4.2 mb and decreases d iesel by 4.2 mb as shownnext:

GRADE GROUP PROD UCTION, mb1-961 (80 cst) F U E L O IL 32.01-961 FUEL OIL -2 7 .81-888 DIESEL - 4 . 2TOTAL 0

DIESEL GRADESIn an estimate, the AOC production of diesel grade 1-876 wasincreased by 79 mb to cover its lifting. Estim ate its effect on AOCinventory.The 1-876 was blended in the refinery with 1-888 diesel and 1-440 tomatch the pour point of 1-876 (21F) as follows. Here, the 1-876 delta is79 mb.

GRADE PRODUCT VOLU ME, mb POUR INDEX1-888 DIE SEL 72.3 3651-440 KE RO SEN E 6.7 461-876 DIE SEL 79.0 338


26/61

The effect on thedieselandkerosene poolis as follows:GRADE GROUP PRODUCTION,mb1-876 DIESEL 79.01-888 DIESEL -72.31-440 KEROSENE -6.7TOTAL 0

Here,AOC diesel pool- 79.0 - 72.3)

= 6.7 mbAOC kerosene pool= 6 7mb

ASPHALTInanestimate, productionofasphaltwas 10,000 barrels lessfor BOC

due to lack of ullage. To estimate the effect of this change on otherbalancing-grade productsthefollowing theprocedurewasemployed.The delta of - 1 0 , 0 0 0 b b l on asphalt production for BOC could beconsideredablendoffueloil anddiesel,as per the asphalt equivalency,shown next:GRADE GROUP VOLUME,mb VISCOSITY BLEND INDEX1-961 F U E L O I L -17.6 4601-888 DIESEL 7.6 -301-1138 ASPHALT -10.0 832

Asaresultof this change,BOCgets +17.6 mb fueloil and7 6mbdiesel,as follows:GRADE GROUP DELTA,mb1-961 FUELOIL 17.61-888 DIESEL -7.61-1138 ASPHALT -10.0TOTAL 0


27/61

Examples of joint-ownership refinery weekly estimates, allocation ofdeltas, and determination of production rates during a month are shownin Tables 18-1 to 18-16. Table 18-1 shows the first refinery estimateand a comparison with combined participant DOPs and calculation ofdeltas. Table 18-2 show deltas by product groups. Table 18-3 showsthe allocation of these deltas by participant, and Table 18-4 showscalculation of the production rate for all product groups based on thefirst estimate. Similar calculations are done for the second, third, andfourth estimates. Thus, production rates of various product groups areworked out for both the participants. In fact, the actual refinery pro-duction rate of various product groups has been split into the twoparticipant's production rates. Whenever a new estimate is done, thenew production rates replace the earlier ones in the refinery's inventoryestimating program. Weekly estimates also ensure that crude run andproduct produced during the month is according to the refinery's DOPfor that month.

INVENTORY AND ULLAGE FORCASTING SYSTEM JOINT OWNERSHIP REFINERIES)The inventory and ullage forcasting system (IUFS) is designed to provideinformation to the participants on their inventory and ullage situation up to90 days ahead, to enable them to plan their product lifting schedule. Data oneach product group are presented in a separate report. This is an on-linesystem in which participants can constantly update their shipping data, suchas placing a new shipment, canceling an already-placed shipment, updatingthe estimated arrival time of expected shipments. The rest of the data areupdated only by the refinery (see Tables 18-17 to 18-23).The system presents estimates on the following, from present day tothat 30-90 days ahead: The physical inventory of each saleable product group of the par-ticipants. The available inventory of each product group for shipment. The ullage available to each participant, for each product group , tofurther build their inventories for shipments. The estimated refinery production rate for every product group of theparticipants.


28/61

Table 18-1Determination of Deltas between Refinary Estimates

and Participants DOPs, First Estimate (mb)

GRADE1-1501-2011-2101-2201-3871-3901-395I-397LLI-397LI-397R1-3981-4001-4111-4191-4401-876I-876zp1-8881-8921-9611-96 IS1-1138

PROCESSSTOCKSREF 9ORREF 95RL.C.NM C NPOLYHSRK E R O B SDIESELBSDES DSLLVGOL.ISOMATEHVGOM. ISOMATEH. ISOMATEFCC CUTTERATM. RESID

PRODUCTSPROCESS STOCKTOTAL

AOCDOP

200839006612002665436200813737151060165601766045

00000000- 1 7 138- 7 533- 2 50750

6154- 1 2 56029

BOCDOP

009616500156011150000171003470260045

18900- 3000- 1 551- 1 54100150

11851011286

COMBINEDDOP

200935165066135602776936200813754251060200302026090

18900- 3000- 1 8 689- 9 074- 2 50900

7339- 2 47315

REFINERYESTIMATE

200102016525901359017269462008238561510601983018763290

- 3 5- 2 6153- 441- 5- 3 0- 2 4 363- 1 1 1259- 4 17104

7390- 3 97351

DELTA

008502524030- 1 0 5010001011900- 2 00- 1 5 0320

- 5 3- 3 5153_ 1

41- 5- 3 0- 5 7- 2 6- 2 1185- 1 671- 9 0451- 1 536


29/61

Table 18-2Delta by Product Group, First Estimate (mb)PRODUCTG R O U P S

LPGLSRWSRGASOKERODSLBDSLFUEL OILASPHALTTOTAL

TOTALDELTA

OO

85- 1 6120

- 2 00

- 1 1 80

51

AOC DELTAALLOCATION00

71- 2 5100

170

- 9 80

31

BOC DELTAALLOCATION00

149

20- 3

0- 2 0

020

The shipment schedule of participants: ship ID, dwt, parcel to beloaded (product grade and the quantity in tons or barrels), and theestimated time of arrival (ETA). The ETA is constantly updated bythe participants.

This information is updated every time that A new refinery production estimate is done , typically, once a week.The refinery's new production rates, of all product groups based onthe new estimate, are entered in the IUFS. The actual closing inventories of the participants from the previousmonth's allocation are available. The tankage capacity allocation of a participant is revised (due toreleasing a storage tank for maintenance or adding a tank, which isput back in service after maintenance). There is a change in the ETA of a ship for the participant.

REFERENCE POINTThe reference point for any product group inventory is the closinginventories of the participants from the final allocation of the previousmonth.To these figures are added, the actual past production of each productgroup of the participant. The basis of future production rates of a


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Table 18-3Estimation of Production Change Allocation for Inventory For

BOCOCAOC

DELTABALANCE

DELTAI-397LL

30I-397L-17

1-961(80)32

I-397L-88

TOTALDELTA

PRODUCTGROUP

00

713100

13102

053

00

85

12016

122

63

14

14

4

4

44

0

22

22

00

851612020

1180

5 1

LPGLSRWSRGASOLINEKEROSENEDIESELFUEL OILASPHALTTOTALNOTES:CRUDERATIO:AOC 0 8354BOC 0 1646


31/61


32/61


33/61

Table 18-6Delta by Product Group, Second Estimate (mb)PRODUCTGR OU PS

LPGLSRW SRGASOKERODSLBDSLFUEL OILASPHALTTOTAL

TOTALDELTA

OO

- 8 0- 1 3

61- 2 8

0- 7 1

1- 1 3 0

AOC DELTAALLOCATION

00

59- 1 1

51- 2 5

0- 6 3

1- 1 0 6

BOC DELTAALLOCATION

00- 2 1- 210_ 30- 80- 2 4

1. The starting or reference point for the IUFS would be the closinginventories for all products as of April 30 (as per the final allocationreport for the month of April of that year). The inventories ofindividual product grades are lumped together into product groups.2. For the past period, M ay 1 to June 9, the actual refinery productionrates for all product groups are available, and these are split intoparticipant p roduction rates on the basis of the weekly allocation ofproduction for the IUFS for that period.

3. For the current date, June 10, to the end of current month, June 30,the production rates as established by latest weekly refinery esti-mates are used.4. For the next 2 months, July and August, the participants' D O P's forJuly and August (advance DO Ps) are used. The advance DO Ps of theparticipants may not be very accurate but, nevertheless, containuseful data on the planned crude run, refinery units onstream factors,and projected product lifting schedule, if known beforehand.

Thus,participants have a useful tool to determine the inventory avail-ability during the next 3 months and can schedule their vessels forproduct lifting accordingly.The IUFS helps sense potential problems associated with the schedul-ing of ships and product loading, such as bunching ships, with theassociated problems of berth availability, and delays or constraints onproduct loading system.


34/61

Table18-7Production Change Allocation For Inventory Forecasts,

BOCOCCONDENSATE-9LSRADJUSTI-397L-41-97176

I-928-651-961 80)32I-397L-18TOTALDELTAPRODUCTGROUP

9

9

99

0

1

1

77

0

1216

28

22

0

5

5

00

8013

612871

130

LPGLSRWSRGASOLINEKEROSENEDIESELFUELOILASPHALTTOTALNOTES:CRUDERATIO:AOC 0 835BOC 0 165


35/61

Table18-8Estimationof Production Rates for InventorLOCALSALES

4)PRODUCTION

INVENTORY3)

ALLOCATEDDELTA

2)DOP

1)PRODUCTGROUPS

1000

91113360006

256

0000

6800000

68

10134520356522

139500

102758

4022

2279370

103277

00

20711790

00

-59-11

51-25

00

-63

-106

00

-21-210-3

00

-80

-24

10134579367471

142000

109057

4128

227

1147293

28000

21511814

AOCLPGLSRWSRGASOLINEKERODSLBDSLHVGOFUELASPHALTTOTAL

BOCLPGLSRWSRGASOLINEKERODSLBDSLHVGOFUELASPHALTTOTAL

ESTIMATEPERIOD =7DAYS


36/61


37/61

Table 18-10Delta by Product Groups, Third Estimate (mb)PRODUCTG R O U P S

LPGLSRWSRGASOKERODSLBDSLFUEL OILASPHALTTOTAL

TOTALDELTA

OO

- 8 21110

- 3 20

- 2 4- 2 3

- 1 4 0

AOC DELTAALLOCATION

00

- 5 9- 1 1

51- 2 5

0- 6 3

1- 1 0 6

BOC DELTAALLOCATION00

- 2 322

- 4 1- 7

039

- 2 4- 3 4

For example, referring to the IUFS system for whole straight runnaphtha (WSR; Table 18-18), Column 1 refers to the calendar date. Column 2 refers to the physical inventory of WSR for participant AOC . Column 3 refers to the physical inventory of WSR for participant BOC . Column 4 is the total refinery inventory on the referred day, the sumof columns 2 and 3. Column 5 is available inventory of participant AOC, obtained by sub-tracting from AOCs physical inventory its allocated LI (Chapter 17). Column 6 is similarly the available inventory of participant BOC,

obtained by subtracting from B O C s physical inventory its allocated LI. Column7is the total available inven tory, the sum of colum ns5and 6. Column 8 is the ullage available to participant AO C for storing itsproduct, the difference between the total storage capacity for WSRavailable to AOC (Chapter 17) and its present inventory. Column 9 is the ullage available to participant BO C for storing itsproduct, the difference between the total storage capacity for WSRavailable to BOC (Chapter 17) and its present inventory. Column 10 is the total available ullage in the W SR g roup of tanks atthe present inventory level. Thus,

Inventory + ullage = (HI LI) for the refineryas well as for participants


38/61

Table18-11Production Change Allocation for Inventory Forecasts,

BOCOCCONDE

-6LSR

ADJUSTASPHALT

-13I-39721

I-397C-25

ASPHALT-10

^97124

I-928-4

1-961(80)3

I-397L-5

TOTALDELTAROUP

66

0

1023

130

10

10

18

18

818

100

32

1

11

2

1

0

1

1

00

821110

322423

140

LPGLSRWSRGASOLINEKEROSENEDIESELFUEL OILASPHALTTOTALNOTES:CRUDE RATIO:AOC 0.835BOC 0.165


39/61

Table18-12Estimationof ProductionRates for Inventory Forecast,LOCALSALES

4)ALLOCATIONINVENTORY

3)ALLOCATED

DELTA2)

DOP 1)

PRODUCTG R O U P

800

59119230004

213

0000

6800000

68

533

382238363871

00

71334

2639

16

693972

16300

161-4

507

00

-6316

-2000

-37-10

-106

00

-19-5

2-12

00

13-13-34

533

445222355891

00

75044

2745

16

884470

17500

1489

541



ESTIMATE PERIOD =7DAYS.


40/61

Table 18-13Determination of Deltas between Refinery Estimatesand Participants DO P, Fourth Estimate (mb)TARGET REFINERY

DOP ESTIMATE DELTAGRADE1 150 3 3 01 201 0 0 01 210 257 262 51 220 12 33 211 383 0 0 01 387 5 5 01 390 29 29 01 395 5 0 5I 397LL 7 7 0I 397L 112 81 31I 397R 47 47 0I 397C 0 0 01 398 11 9 201 400 3 3 01 411 2 2 01 419 280 280 01 440 94 150 561 800 0 0 01 876 55 55 0I 876zp 0 0 0I 885SP 72 72 01 888 5 6 337 3931 888 52DI 348 0 3481 892 1 0 11 928 0 0 01 961 408 390 1 8I 961S 0 0 01 971 6 6 01 1138 15 12 3

PROCESSSTOCKS

REF 9OR -1 3 -1 2 1R E F 95 R - 1 6 - 1 4 2L CN - 1 8 - 1 8 0M C N - 9 - 9 0P OL Y - 8 - 8 0HSR 30 30 0KER OBS 40 40 0D I E S E LB S - 1 6 - 1 6 0DES DSL 3 3 0LVGO 39 39 0L. ISOMA TE 11 11 0H V GO - 8 7 - 2 0 6 7M. ISOMATE 56 17 - 3 9H. ISOMATE 134 57 - 7 7F C C C U T T E R - 1 0 2 - 3 3 6 9ATM. RESID - 3 1 - 3 1 0PRODUCTS 1456 1401 - 5 5PROCE SS STOCKS 13 36 23TOTAL 1469 1437 - 3 2


41/61

Table 18-14Delta by Product Groups, Fourth Estimate (mb)PRODUCTG R O U P SLPGLSRWSRGASOKERODSLBDSLFUEL OILASPHALTTOTAL

TOTALDELTAO

- 2 153

- 6 758

- 1- 1 8

- 2- 4 3

AOC DELTAALLOCATIONOO- 2 34- 5 648- 1- 1 4

_ 2- 4 4

BOC DELTAALLOCATIONO

- 2 128

- 1- 1 1

10O

4O1

that is, column 5 + column 8 = HILI, or allocated tankagecapacity, for participant AOC (Chapter 17); andcolumn 6 + column 9 = HILI, or allocated tankage capacity,for participant BOC. Columns 11 and 12 show the volume of projected lifting ofproducts by the participants in thousand barrels on the date shown.Column 13 shows the ship ID, or identification number. Column14 lists the product grade to be lifted by the ship. Column 15shows the name of the ship and the likely date when the productis to be lifted. The data in columns 11 to 15 is constantly updatedby the refinery, on receipt of information on ship ETA from theparticipants.

Columns 16 and 17 indicate the current production rate of partici-pants AOC and BO C. The production rate and product shipments arereflected as follows. The actual inventories of the participants (col-umns 1 and 2) increase at the rate of their production rates. Forexample, referring to the IUFS for WSR naphtha date June 19, thephysical inventory of participant AOC is 796mb. On June 20, theinventory increases to (796 + 30) or 827 mb, the production ratebeing 30.3 mb per day. The inventory on June 21 is (827 + 30.3450) or 407mb. Here, 450mb is the WSR product loaded on shipNordflex (column 11).


42/61

Table18-15ProductionChange Allocation for Inventory Forecast

BOCOC

CONDENSAT-7

LSRADJUST

REFORMERFEED-42

ASPHALT-2

REFORMERFEED-127

I-397L-26

TOTALDELTAROUP

71414

0

2418

42

2

4

0

25102

127

7

7

021

53

675 81

18

43

LPGLSRWSRGASOLINEKEROSENEDIESELMARINEDSLFUEL OILASPHALTTOTAL

CRUDERATIO:AOC0.8354BOC 0.1646


43/61

Table18-16Estimationof Production Rates for Inventory Forecast,LOCASALE

4)ALLOCATIONINVENTORY

3)ALLOCATED

DELTA2)

DOP1)

PRODUCTG R O U P

400

2755110002

99

00000000000

-3-10192149104399-1

033211

1173

0-23

7028207900

642

240

00

-234

-5648-1

0-14-2

-44

0-21

28-1

-111000

-401

-3-10215145160351

00

346131217

0-24229316900

682

239



ESTIMATEPERIOD = 6 DAYS.


44/61

Table 18-17Lifting for Product Group LSR, Light Straight-Ru

SSHIPMENT

M. BARRI ESLLAGEAVAILABLEINVENTORY

ACTUALINVENTORY

BOC 12 )

AOC 11)

BOC TOTAL9) 10)

AOC8)

TOTAL7)

BO C6)

AOC5)

TOTAL4)

BO C3)

AOC2)

DATE 1)

46

1831781721671611561501451391341281231171121061019590847973686257

297292286275270264

8075696458534742363125201493

-2-8

-13-19-24-30-35-41-46

194H189H183H178H172H167H

103103103103103103103103103103103103103103103103103103103103103103103103103103103103103103

122127133138144149155160166171177182188193199204210215221226232237243248

81319243035

4247535864697580869197102

108113119124130135141146152157163168

-72-67-61-56-50-45

808080808080808080808080808080808080808080808080808080808080

208213219224230235241246252257263268274279285290296301307312318323329334

9499

105110121445

7681879298

103109114120125131136142147153158164169175180186191197202

-38-33-27-22-11313

132132132132132132132132132132132132132132132132132132132132132132132132132132132132132132

1-Jun2-Jun3-Jun4-Jun5-Jun6-Jun7-Jun8-Jun9-Jun

10-Jun11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun


45/61

Table 18-18Lifting for Product Group WSR, Whole Straight-RSHIPMENTLLAGE

AVAILABLEINVENTORY

BO C12 )

AOC 11 )

TOTAL10 )

BOC9)

AOC8)

TOTAL7)

BO C6)

AOC5)

TOTALINVENTORY

4)

ACTUALINVENTORY

BO C3)

AOC2)

DATE1)

36

225

450

713680646611578544734701667632598565531496463429394361327292708675641606809775740707673638

607604600596593589585582578574570567563559556552548545541537533530526522609605601598594590

106764615

-15-45149119

895828

-32-63-93

-123-154-184-214-245

175145115

84200170139109

7948

546579613648681715525558592627661694728763796830865898932967551584618653450484519552586621

173176180184187191195198202206210213217221224228232235239243247250254258171175179182186190

373403433464494524330360390421451481511542572602633663693724304334364395279309340370400431

772805839874907941751784818853887920954989

102210561091112411581193810844879676710745778812847

296299303307310314318321325329333336340344347351355358362366370373377381294298302305309313

476506536567597627433463493524554584614645675705736766796827407437467498382412443473503534


10-Jun11-Jun12-Jim13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun


46/61

Table 18-19Lifting for Product Group Gasoline m

SSHIPMENTLLAGE

AVAILABLEINVENTORY

BOC12)

AOC 11)

TOTAL 10 )

BOC9)

AOC8)

TOTAL7)

BOC6)

AOC5)

TOTALINVENTORY

4)

ACTUALINVENTORY

BOC3)

AOC2)

DATED

A

A

AC

A

AAA

35

19

26

35

18

4439

120

217201184168251235219263247231214198181200183202186169171155138122105133155521505488472456

-17-20-24-28-17-20-24

740-4

-11-15-19

13952

-6-9

-13-17-21133129125122118

234221208196268255243256243231218205192215202189177164169157144131118150176388376363350338

258274291307224240256212228244261294275292273289306304320337353370342320-46-30-13

319

207210214218207210214183186190194197201205209177181185188192196199203207211

5761656872

51647789173042294254678093708396

108121116128141154167135109

-103-91-78-65-53

557573590606523539555511527543560576593574591572588605603619636652669641619253269286302318

327330334338327330334303306310314317321325329297301305308312316319323327331177181185188192

230243256268196209221208221233246259272249262275287300295307320333346314288

7688

101114126




47/61

Table 18-20Lifting for Product GroupKerosene m

SHIPID

13 )

SHIPMENTLLAGEAVAILABLEINVENTORY

ACTUALINVENTORY

BOC 12 )

AOC 11)

TOTAL 10 )

BOC9)

AOC8)

TOTAL7)

BOC6)

AOC5)

TOTAL4)

BOC3)

AOC2)

DATE 1)

A9210A9211A9212C90535A9183C90428

A9150A9160

A9184

C90634

238

80

2922

44

86199

64

266241216193

221197172429406381357332307370544520495470511486462437412389364340395370347322

120117114112

110107104202200197194191188186183180177174172169166163160158155152229226224221

146124102

81

1119068

227206184163141119184361340318296339317296274252231209188166144123101

453478503526

498522547290313338362387412349175199224249208233257440307330355379324349372397

167170173175

177180183858790939699

10110410711011311511812128212712913213558616366

286308330351

321342364205226248269291313248

7192

11413693

115136158180201223244266288309331

867892917940

912936961704727752776801826763589613638663622647671696721744769793738763786811

333336339341

343346349251253256259262265267270273276279281284287290293295298301224227229232

534556578599

569590612453474496517539561496319340362384341363384406428449471492514536557579

1-Jun2-Jun3-Jun4-Jun

5-Jun6-Jun7-Jun8-Jun9-Jun10-Jun

11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun


48/61

Table 18-21Lifting for Product Group Diesel mSHIPID

13)


ACTUALINVENTORY

BOC 12)AOC 11)

TOTAL 10)

BOC9)

AOC8)

TOTAL7)

BOC6)

AOC5)

TOTAL4)

BOC3)

AOC2)

DATE 1)

AC287AJ213C20425C2042GB226AJ213A29179A2921A2921A2921GB2269C29053AJ213

GB227GB226A29177A2918C2053AC2873A29197

145

45P

13

37

1

45S

129

1412O

O118441

3203

438

401320462

439356282461381

350

339328451

453442431456445

88

62-811

-14-86

-1495-64

609

646727585

608691765586666

68

7990-33

-35-24-13-38-27

541

567637618

643715778624693

873

910991849

872955

1029850930

174

18519673

7182936879

699

725795776

801873936782851

1-Jun

2-Jun3-Jun4-Jun

5-Jun6-Jun7-Jun8-Jun9-Jun


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Table18-21ContinuedSHIP

ID13)

S H I P M E N TL L A G EA V A I L A B L EIN V E N T O R Y

ACTUALIN V E N T O R Y

BOC12)

AOC 11)

TOTAL10)

BOC

AOC8)

TOTAL7)

BOC6)

AOC5)

TOTAL4)

IO C3)

AOC B2)

DATE1)

C20433AC2882A29149A29150A29214

A29117AC2874AC2883A29172C20536C20427

AC2875A29115C20427C20537C20427C20634A29147C20635

45

4545P

14845

95P80

45

42556637

22235

45S

185

95S

222

545466382555582536452369286795714255

936852770686606

900817734873834

478467455444477466454443431420408

397385374362351

437426414403436

67-1

-7311110570

-74-145

375306

539467396324255

463391320470398

502581665492465511595678761252333

111195277361441

147230313174213

-60-49-37-26-59-48-36-25-13-2

10

2133445667

-19-8

415

-18

566630702518524559631703774254323

90162233305374

166238309159231

766845929756729775859942

1025516597

375459541625705

411494577438477

465769804758708193104

116

Y l139150L62173

8798

L l O12188

720788860676682717789861932412 :481 :

248 :320 :391 :463 :532 :

324396467 :317 :389

10-Jun11-Jun12-Jun13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun




50/61

me l O i-22> upFt

able18uct Gre

TiProdiforiftin

SHIPID

13)


ACTUALINVENTORY

BOC12)

AOC 11)

TOTAL10)

BOC9)

AOC8)

TOTAL7)

BOC6)

AOC5)

TOTAL4)

JO C3)

AOC E2)

DATE1)

GA26

A921A914

A915

A915

A905A908

6

130518

32

130

65518

1200113610731009951888824

122011561618155514911428139613321269120512721208114410811017954890826763910847

13011237

577569561553545537529596588580572564556548540532524516508500492484476468460452590582574566

623567512456406351295624568

1038983927872848792737681756700644589533478422366311320265727671

272336399463521584648252316

-146-83-194476

140203267200264328391455518582646709562625171235

12202836445260

1917

25334149576573818997105

113121129137-1

71523

260316371427477532588259315

-155-100-44113591

146202127183239294350405461517572563618156212

602666729793851914978582646184247311374406470533597530594658721785848912976

1039892955501565

144152160168176184192125133141149157165173181189197205213221229237245253261269131139147155

4585145696256757307864575134398

154209233289344400325381437492548603659715770761816354410


10-Jun11-Jun12-Jim13-Jun14-Jun15-Jun16-Jun17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun


51/61

Table 18-23Lifting for Product Group Asphalt

S


ACTUALINVENTORY

BOC 12 )

AOC 11)

TOTAL 10 )

BOC9)

AOC8)

TOTAL7)

BOC6)

AOC5)

TOTAL4)

BOC3)

AOC2)

DATE 1)

BAB3B3BS

BA

BAB3

BSB3BA

5

5

7

7

6

5

76

6

6

-11-8

-12-7-4-1-4-7

-10-5-8

-10-14-16-19-21-10-13-10-12-15-12-16-18-21-23-20-17-20-17

-3-1-2-4

0-2-3-5-1-4-5-7-843

10-220-1-3-40

-31

-9

-11-5

0-1-24-5-6-7-8

-10-11-12-13-14-16-11-12-13-14-16-17-18-19-20-16-17-18

454246413835384144394244485053554447444649465052555754515451

16121415171315161812141517182021

910121315111314161713141612

293032262122232526272829313233343537323334353738394041373839

595660555249525558535658626467695861586063606466697168656865

221820212319212224182021232426271516181921171920222319202218

373840342930313334353637394041424345404142434546474849454647




52/61


53/61

Table 18-24Lifting for Product Group LSR, Light Straight-RuSHIP

ID6)

SHIPMENT5)

ULLAGE4)

AVAILABLEINVENTORY

3)PHYSICAL

INVENTORY2)

DATE 1)

6042646

1831781721671611561501451391341281231171121061019590847973686257

297292286275270264

122127133138144149155160166171177182188193199204210215221226232237243248

81319243035

208213219224230235241246252257263268274279285290296301307312318323329334

9499

105110121445




54/61

Table 18-25Lifting for Product Group WER, Whole Straight-RuSHIPID

6)SHIPMENT

5)ULLAGE

4)AVAILABLEINVENTORY

3)PHYSICAL

INVENTORY2)

DATE

A91460

A91100

C90426

225

450

236

713680646611578544734701667632598565531496463429394361327292708675641606809775740707673638

546579613648681715525558592627661694728763796830865898932967551584618653450484519552586621

772805839874907941751784818853887920954989

102210561091112411581193810844879676710745778812847




55/61

Table 18-26Lifting for Product Group Gasoline mGSHIPID

6)SHIPMENT

5)ULLAGE


3)PHYSICAL

INVENTORY2)

DATE 1)

A91790

A91820

A91500C90421

A91840

A91780A92130A91760

19

26

3535

18

4439120

217201184168251235219263247231214198181200183202186169171155138122105133155521505488472456

258274291307224240256212228244261277294275292273289306304320337353370342320-46-30-133

19

557573590606523539555511527543560576593574591572588605603619636652669641619253269286302318


10-Jun11-Jim12-Jun13-Jun14-Jun15-Jun16-Jim17-Jun18-Jun19-Jun20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun


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Table 18-27Lifting for Product Group Kerosene mG R ACO

7SHIP

ID6)

SHIPMENT5)

ULLAGE4)

AVAILABLEINVENTORY

3)PHYSICAL

INVENTORY2)

DATE 1)

1-41-41-41-41-41-4

1-41-4

1-4

1-419

A9210A9211A9212

C90535A9183

C90428

A9150A9160

A9184

C90634

2922

44238

86199

64

80

266241216193

221197172429406381357332307370544520495470511486462437412389364340395370347322

453478503526

498522547290313338362387412349175199224249208233257440307330355379324349372397

867892917940

912936961704727752776801826763589613638663622647671696721744769793738763786811

1-Jun2-Jun3-Jun4-Jun




57/61

Table18-28Lifting for Product Group Diesel mGRADCODE

7)

SHIPID6)

S H I P M E N T5)

ULLAGE4)

A V A I L A B L EI N V E N T O R Y

3)

PHYSICALI N V E N T O R Y

2)DATE

1)1-8881-8881-8881-8881-8881-8851-8851-8851-8851-8881-8851-8881-8881-8881-8001-8881-8881-8881-8881-888

AC2878AJ2133C20425C20425GB2263AJ2134A29179A29210A29211A29212GB2269C290535AJ2135GB2270GB2268A29177A29183C20538AC2873A29197C20433

11904512

12914120

13111844137

20345

438

401320462

439356282

461381

609

646727585

608691765

586666

873

910991849

8729551029

850930

1-Jun

2-Jun3-Jun4-Jun

5-Jun6-Jun7-Jun

8-Jun9-Jun


58/61

1-888

1-8761-8881-888

1-8881-8881-8881-8761-888

1-8881-888-ooo

1-8881-4191-8881-888

AC2882

A29149A29150A29214

A29117AC2874AC2883A29172C20536C20427

AC2875A 29115C20427C20537C20427C20634A29147C20635

4

2556637

222352554590

31851484519080

22245

545466382555582536452369286795714

936852770686606

900817734873834

502581665492465511595678761252333

111195277361441

147230313174213

7668459297567297758599421025516597

375459541625705

411494577438477

10-Jun11-Jun12-Jun13-Jun14-Jun15-Jim16-Jun17-Jim18-Jim19-Jun20-Jun




59/61

Table 18-29Lifting for Product Group Fuel Oil mGSHIP

ID6)

SHIPMENT5)

ULLAGE4)

AVAILABLEINVENTORY

3)PHYSICAL

INVENTORY2)

DATE 1)

GA265

A9216A9144

A9150

A9154

A9056A9083

130518

32

130

65518

1200113610731009951888824122011561618155514911428139613321269120512721208114410811017954

890826763910847

13011237

272336399463521584648252316

-146-83-1944

76140203267200264328391455518582646709562625171235

602666729793851914978582646184247311374406470533597530594658721785848912976

1039892955501565




60/61

Table 18-30Lifting for Product Group Asphalt mSHIPID

6)SHIPMENT

5)ULLAGE


3)PHYSICAL

INVENTORY2)

DATE 1)

BA3101B39215B39218BS3116

BA3102

BA3103B39219

BS3118B39220

BA3105

5765

7

76

66

5

-11-8-12-7-4-1-4

-10-5-8

-10-14-16-19-21-10-13-10-12-15-12-16-18-21-23-20-17-20-17

454246413835384144394244485053554447444649465052555754515451

595660555249525558535658626467695861586063606466697168656865


10-Jun11-Jun12-Jim13-Jun14-Jun15-Jun16-Jim17-Jun18-Jim19-Jim20-Jun21-Jun22-Jun23-Jun24-Jun25-Jun26-Jun27-Jun28-Jun29-Jun30-Jun


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each product group, are used for future physical inventory forecasts. LIand HI data for every product group tankage (Chapter 17) is used toestimate the available inventory:Available inventory = physical inventoryLLTotal volume available for storing a product group = (HILI)(HILI) = actual inventory + ullage

where ullage is estimated from the preceding relationship. The rest offormat for a single-ownership IUFS system is almost identical to that forjoint-ownership refineries discussed earlier.The IUFS is updated every time that A new refinery production estimate is done, typically, once a week.Refinery new production rates, for all product groups, based on thenew estimate, are entered in IUFS. The tankage capacity in a product group service is revised (due toreleasing a storage tank for maintenance or adding a tank, put back

in service after maintenance). There is a change in the ETA of a ship, a new shipment is inserted, ordata on an existing projected shipment is revised.

Date post:	03-Jun-2018
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Available Tankage Capacity

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