12.QUICKLOOK ANALYSIS-6.pdf

8/16/2019 12.QUICKLOOK ANALYSIS-6.pdf

1/9

WELL LOG ANALYSIS.WELL LOG ANALYSIS.03.Quicklook Analysis Concepts.03.Quicklook Analysis Concepts.

Mustoto Mustoto Moehadi Moehadi ..HP. 0811863643 HP. 0811863643

[email protected]

5MT – Oil & Gas Business Series.

5MT - Oil & Gas Business Course.

Quicklook Analysis Concepts.

Pendahuluan Pendahuluan



3 5MT - Oil & Gas Business Course.


QUICKLLOK ANALYSIS.QUICKLLOK ANALYSIS.

1. Basic Concept.

1. Review logs .

2. Identify Reservoir Rocks.

3. Discriminate Hydrocarbon Zone,

4. Oil / Gas Differentiation.

5. Establish Porosity and Rw.

6. Establish Sw.

7. Reporting.



5

Mempunyai satu set logsdan lakukan analisis logdasar, diantaranya;

Mengenali batuan reservoir yangmempunyai pori-pori danpermeabilitas.

Estimasi porositas.

Menghitung water saturation.

Bisa membedakan antara minyakdan gas.

Medium

Resistivity

Deep

Resistivity

Caliper

Gamma

Ray

Density

Neutron

Sonic

SPWLASPWLA

1. Basic Concepts Log Analysis.1. Basic Concepts Log Analysis.



Pertanyaan yang mendasar antara

lain;

Tipe batuan ?.

Apak ah ada HC ?.

Jika ada, apa perlu test dan

langsung diproduksi.

Apak ah HCnya berupa oi l, gas atau

kondensat.

Berapa nilai Net pay, porosity, water

saturation, reservesnya ?. Dll.

NExTNExT--Schlumberger, 2004Schlumberger, 2004

1. Basic Concepts Log Analysis.1. Basic Concepts Log Analysis.


2/9



7

1.1.Review The Logs.1.1.Review The Logs.



Kepala Kepala Log (Heading).Log (Heading).

Sebuah logumumnyamempunyai judul/kepala yang padabagian atasnyaakandicantumkansemua informasi yangberhubungandengan sumur.





1





1


3/9



13

1.1.Review Logs.1.1.Review Logs.



1

Batuan.

Dengan logyang tersedia,

dapatditentukanbatuanreservoir danyang bukan.

1.2.Identify Reservoir Rock.1.2.Identify Reservoir Rock.



15

Mud Cake

Bit Size

Caliper Caliper


Mudcake atau Indikator

permeabilitas. Batu pasir umumnya mempunyai pori-pori

dan permeabilitas.

Indikasi Washout, umumnya

pada batuan Shales.

Jika 4-6 arm yang digunakanmaka hal tsb dapat dipakai

sebagai indikasi membedakanproperties mekanis dari batuan

seperti adanya overpresruredengan membedakan bentuklubang bornya.

IncreaseIncrease



1

GR min

GR max

GR(API) 1000

50%

shale

0%

shale

100%

shale

1.2.Identify Reservoir Rock. 1.2.Identify Reservoir Rock.

Vsh =

minmax

min

GRGR

GRGR

−

−

Vsh = Shale volume

GR = GR log terbaca

GRmax = GR log di shale zone

GRmin = GR log di clean sand zone

GR dan SP dapat digunakan

untuk memprediksi batuan

Reservoir dan non

Reservoir/permeable.



17




1



4/9



19

1.2.Identify Reservoir Rock. 1.2.Identify Reservoir Rock. DT

(μs/f)140 40

DT

(μs/f)140 40

Sandstone

Limestone

Coal

Alat Logg ing Sonic untuk

identifikasi batuan

SONIC LOG SONIC LOG



2

1.3.Discriminate Hydrocarbon Zone.1.3.Discriminate Hydrocarbon Zone.



21




2




23

1.4.Gas/Oil Differentiation. 1.4.Gas/Oil Differentiation.

RESISTIVITY LOG

Dengan mengetahui resitivitas

fluida, kita dapat mengidentifikasi

kandunganny a (Gas, Oil, Water)

GR(API) 1500

Sand

Sand

Gas/Oil

Water

Gas/Oil

Res (ohmm) 200.2

Contact

GR

Res



2

Latihan Latihan (Geological/ (Geological/ Petrophysical Petrophysical interpretation) interpretation)


5/9



25

Latihan Latihan (Geological/Petrophysical interpretation) (Geological/Petrophysical interpretation)

GAS

OIL

WATER



2

1.4.Gas/Oil Differentiation.1.4.Gas/Oil Differentiation.

Gas / Oil ContactGas / Oil Contact

Oil / Water ContactOil / Water Contact



27




2

Shale

Coal

Sandstone

Shale

Limestone

Shale

NPHI (v/v) 00.6Density (gr/cc) 2.71.7NPHI (v/v) 00 .6 NPHI (v /v) 00.6

Density (gr/cc) 2.71 .7 Densit y (g r/ cc) 2.71.7


Coal

Alat Logging Dens ity dan Neutrondapat mengidentifikasi fluida

dalam batuan

NPHI (v/v) 00.6Density (gr/cc) 2.71.7NPHI (v/v) 00 .6 NPHI (v /v) 00.6

Density (gr/cc) 2.71 .7 Densi ty (g r/ cc) 2.71.7

Water

GasOil

Aplikasi Aplikasi Density LogDensity Log RespResp



29

1.5.Establish Porosity and Water1.5.Establish Porosity and Water Resisitivity Resisitivity ..



3

1.5.Establish Porosity and Water1.5.Establish Porosity and Water ResisitivityResisitivity


6/9



31

1.5.Establish Porosity and Water1.5.Establish Porosity and Water Resisitivity Resisitivity ..



3

1.5.Establish Porosity and Water1.5.Establish Porosity and Water ResisitivityResisitivity



33

Water Saturation. Adalah pecahan vo lume dari

rongga yang terisi oleh air.

BVW (bulk volume water) =Por*Sw.

Saturasi HC = (1-Sw).

BVHC (bulk volume Hc) =Por*(1-Sw).

Bateman, 1985Bateman, 1985

1.6.Calculate Saturation.1.6.Calculate Saturation.



3




35




3



7/9



37

1.7.Reporting.1.7.Reporting.



3

Medium Resistivity

Deep Resistivit y

Caliper

Gamma Ray

DensityNeutron

Sonic

Gamma RayTotal Gas

SWPorosity

DeepResistivityLithology

Shale

Sand

ØT

1.7. Reporting:1.7. Reporting: Interpretation Results Interpretation Results WirelineWireline Log Log

SPWLASPWLA



39

8. Summary.

Dengan row log data serta penerapapan prinsip-prinsip dasar dapatuntuk memperkiraan pay secara kwantitatif, yaitu dengan cara;

Tentukan lapisan porous dan permeabilitas.

Bacalah hargaporositas dari log porositas.

Cari HC dan lapisan yang mengandung air (water bearing) denganresistivity log.

Gunakan rumus Archie untuk mendapatkan Rw dan Sw.

W EL LS F ORMA TI ON G RO SS NET N/ G A VG A VG A VG A VG NET N/ G A VG A VG A VG

TOP BASE INTERVAL PAY PAY PHI SW VSH PERM RES ROCK RES PHI VSH PERM

(feet) (feet) (feet) (feet) (feet)

B eb ek -1 A ta s-1 2771 2811 40 26 0 .64 0. 35 0. 13 0. 02 6 07 27 0. 66 0. 34 0. 02 5 92

Atas-2 2811 2859 48 9 0.18 0.24 0.65 0.24 57 14 0.30 0.23 0.25 44

Atas-3 2859 2901 42 22 0.52 0.33 0.51 0.05 475 39 0.93 0.32 0.06 380

B eb ek -2 A ta s-1 2753 2793 39 28 0 .70 0. 35 0. 13 0. 03 6 71 28 0. 70 0. 35 0. 03 6 71

Atas-2 2793 2830 37 5 0.12 0.27 0.68 0.13 143 10 0.27 0.25 0.20 91

Atas-3 2830 2853 23 19 0.84 0.30 0.57 0.07 268 22 0.95 0.29 0.09 242B eb ek -3 A ta s-1 2763 2796 33 25 0 .76 0. 29 0. 50 0. 03 2 46 26 0. 78 0. 29 0. 04 2 42

Atas-2 2796 2834 39 7 0.18 0.30 0.61 0.16 269 9 0.22 0.29 0.18 229

Atas-3 2834 2940 106 0 0.00 ------ ------ ------ --------- 14 0.13 0.32 0.28 299

BEBEK-1, 2 and 3 Wel l PETROPHYSICAL SUMMARY

1.7.Reporting.1.7.Reporting.



4

Lithology Lithology Indicators for Common Minerals.Indicators for Common Minerals.



41

N N - - D D



4

Summaries : IdentificationSummaries : Identification Lithology Lithology & Fluid.& Fluid.

DT

(μs/f)

Resistivity

(Ohmm)0.2 200 140 40 RHOB

(G/C3)

Neutron

(v/v)

1.7 2.7

0.6 0

GR

(GAPI)0 150

Sandstonewith gas contain

and fluid contact

Coal

Limestone

Organic shale

Sandstonewith fluid contact(gas-oil/water)

HC

HC

DT

(μs/f)

Resistivity

(Ohmm)0.2 200 140 40 RHOB

(G/C3)

Neutron

(v/v)

1.7 2.7

0.6 0

GR

(GAPI)0 150

Sandstonewith gas contain

and fluid contact

Coal

Limestone

Organic shale

Sandstonewith fluid contact(gas-oil/water)

HC

HC


8/9



43

Summaries:Summaries: Aplikasi Aplikasi LogLog Respon Respon

GAPI 1500 Res (ohmm) 20000.2 NPHI (v/v) 00.6Density (gr/cc) 2.71.7

GAPI 1500 GAPI 1500 Res (ohmm) 20000 .2 Res (ohmm) 20000.2 NPHI (v/v) 00 .6 NPHI (v /v) 00.6Density (gr/cc) 2.71 .7 Densi ty (g r/ cc) 2.71.7

GAPI 1500 Res (ohmm) 20000.2 NPHI (v/v) 00.6Density (gr/cc) 2.71.7

GAPI 1500 GAPI 1500 Res (ohmm) 20000 .2 Res (ohmm) 20000.2 NPHI (v/v) 00 .6 NPHI (v /v) 00.6Density (gr/cc) 2.71 .7 Densi ty (gr / cc) 2.71.7

Shale

Coal

Shale

Clean Sand

Shale

Limestone

Shale

Coal



4

BolehBoleh ditambahinditambahin lagilagi khan ?????khan ?????

By Ir. Mustoto Moehadi. MM



45

Dipmeter Dipmeter



4

Density Density - - Sonic for Fracture Identification.Sonic for Fracture Identification.



47

Simbol Simbol Used in Log Interpretation.Used in Log Interpretation.



4

SYMBOLS AND NOMENCLATURE SYMBOLS AND NOMENCLATURE Borehole Invasion Profile and Corresponding Symbols illustrates a simplified model of an invasion

profile. The various symbols used to describe these zones within the borehole environment arelisted below:

Resistivities:

Rt - Resistivity of the formation in the virgin zone, ohm-mRxo - Resistivity of the flushed zone, ohm-mRs - Resistivity of the shoulder (adjacent) beds, ohm-m

Rm - Resistivity of the mud, ohm-mRmc - Resistivity of the mudcake, ohm-mRw - Resistivity of 100% formation water, ohm-mRmf -Resistiv ity of 100% mud f i lt rate , ohm-m

Saturations:

Sw - Water saturation in the virgin zone, fraction of pore volume in, %Sxo - Mud filtrate saturation in the flushed zone, %

Diameters:

dh - Diameter of the hole, mdi - Diameter of the flushed zone, mdj - Diameter of the flushed and transition zones together, m

Thicknesses:

h - Height of the bed being logged, mhmc- Thickness of the mudcake, m


9/9



49

Mud Logging. Mud Logging.

DataData dandan

interpretasiinterpretasi akanakan

ditampilkanditampilkan dalamdalam bentuk bentuk loglog atauatau

angkaangka--angkaangka//

catatancatatan sesuaisesuai

dengandengan

kedalamannyakedalamannya..

Formation Evaluation Overview Formation Evaluation Overview



5

Date post:	05-Jul-2018
Category:	Documents
Upload:	rinaldiosman
View:	229 times
Download:	0 times

12.QUICKLOOK ANALYSIS-6.pdf

Documents