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Oil Field Manager ~ Presentation
April 19, 2023
OFM helps engineers manage more wells effectively in less time
2
Data Organisation in OFM All data stored in relational database. Since OFM 2000, OFM uses Microsoft
Access for data storage. Links to other databases possible via
ODBC: Permanent download to Access. Live link to external database (no data
duplication).Access
DB
External Database
OFM
3
Data Input Levels in OFM Master Table is used to set the project key.
Corresponds to the lowest level at which data is available (usually either Completion or Wellbore).
Other well information may be included (well co-ordinates etc).
Completion
Completion
Field
Wellbore
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Base Map
5
Base Map
6
Filtering Capabilities In OFM
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Sample Production Plots
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Sample Production Plots
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Sample Production Plots
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Basic Production Plot
1976 77 78 79 80 81 82 83 84 85 86 87 88 89 900
100
200
300
400
500 160001177110038801S01Oil Rate (Cal. Day) ( bbl/d )
Water Rate (Cal. Day) ( bbl/d )
Liquid Rate (Cal. Day) ( bbl/d )
Unocal - Basic Production Plot #1Cum Gas = 2.992 ( Bcf )Cum Oil = 604.621 ( Mbbl )Cum Water = 115.114 ( Mbbl ) 160001177110038801S01 Flowunit = BU1 6 RDE006
1976 77 78 79 80 81 82 83 84 85 86 87 88 89 900
15
30
45
60
75
0
40
80
120
160
200 Axis 1
Water Cut ( % ) 160001177110038801S01
Axis 2Gas Oil Ratio ( Mcf/bbl ) 160001177110038801S01
Unocal - Basic Production Plot #1Cum Gas = 2.992 ( Bcf )Cum Oil = 604.621 ( Mbbl )Cum Water = 115.114 ( Mbbl ) 160001177110038801S01 Flowunit = BU1 6 RDE006
1976 77 78 79 80 81 82 83 84 85 86 87 88 89 900
600
1200
1800
2400
3000 160001177110038801S01
Cumulative Oil Production ( Mbbl )
Cumulative Gas Production ( MMcf )
Cumulative Water Production ( Mbbl )
Unocal - Basic Production Plot #1Cum Gas = 2.992 ( Bcf )Cum Oil = 604.621 ( Mbbl )Cum Water = 115.114 ( Mbbl ) 160001177110038801S01 Flowunit = BU1 6 RDE006
•Productivity decrease drastically as soon as the water hit the well:•AL?, Emulsion problems? Scale? Fines migration?
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DCA in OFM
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Bubble Maps In OFM ~ Monthly Production
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Sample Bubble Maps
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Sample Bubble Maps
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Sample Bubble Maps
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Lesson 3.4
Sample Bubble Maps
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Sample Bubble Maps
Sample Bubble Maps
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Sample Bubble Maps
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Sample Bubble Maps
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OOIP and grid map in OFM
OFM can calculate the original-oil/gas-in-place for reservoirs. This technique uses the volumetric equation and grid arithmetic.
Boi
gridmapSwigridmapgridmaphAN
))(1(*)(*)(*
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OOIP and grid map in OFM
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OOIP and grid map in OFM
Boi
* *
=
23
Normalized Mapping – (OOIP-Np) Map
Area of low recovery efficiency – workover potential exist?
Area of over recovery efficiency – Potential additional pay presents ?
24
Basic Production Maps
Best gas well
Zones with very low recovery of gas-Undrained zones?-Potential for new wells?-Stimulation opportunities?
25
Production Heterogeneity Index
• Heterogeneity indexing is -
Comparing individual wells to the average of a well group A fast way to identify over- and underperforming wells, best
completion practices etc.
1wellsofaverage
well
value
valueHI
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Desired results and interpretation
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Re - perforation Analysis
Due to different perforation techniques, some wells experienced problems
Underbalanced perforating (through tubing) may not have achieved full penetration
Cumulative liquid produced per perf foot is a technique to evaluate perforation productivity
Grid map/bubble map results
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Damage Indicator
Formation damage analysis Simple damage analysis Formation Damage Index (FDI)
Grid map Pressure transient is preferred for
calculating skin Treatment = acidize well to remove
damage
sr
rB
p
kh
qFDI
w
eoo ln
007078.0
29
Decline Curve Analyses Equations
Exponential Decline Conversions (where b = 0)
Hyperbolic Decline Conversions (where 0 < b < 1)
Harmonic Decline Conversions (where b = 1)
b
i
i
tbD
qtq 11
tDi
ie
qtq
tDq
tqi
i
1
30
DCA in OFM
Potential zones with high Reserves
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Volumetric Drainage Radius Estimation
Visual representation of the drainage area per well in the reservoir. Areas not being drained by wells are quickly identified visually with bubble
mapping
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Technical Discussion
Volumetric Drainage radius (rev) calculation Literally, the volume occupied by the produced fluid at reservoir conditions Assume uniform pressure reservoir Volumetric method
Drainage radius for Np and EUR Additional variable can be displayed with drainage radius to provide insight of
reservoir performance
ftSSh
BNr
orw
oipev )1(
615.5
33
Volumetric Drainage Radius Example
Drainage Radius at Np
Undeveloped spots
Drainage Radius at EUR