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Data Mining & Oil-Field Modeling Y.Chang. Outline Background Reservoir Simulation Modeling Examples and Projects.

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Presentation on theme: "Data Mining & Oil-Field Modeling Y.Chang. Outline Background Reservoir Simulation Modeling Examples and Projects."— Presentation transcript:

1 Data Mining & Oil-Field Modeling Y.Chang

2 Outline Background Reservoir Simulation Modeling Examples and Projects

3 Geology

4 Oil and Gas Reservoir

5 Porosity Porosity = pore-volume / bulk-volume –a measure of the void spaces in a material

6 Porosity Distribution

7 Darcy’s Law –describes the flow of a fluid through a porous medium Permeability –a measure of the ability of a material (such as rocks) to transmit fluids Darcy’s Law

8 Phase Diagram

9 Saturation A measure of the fluid spaces in pores, e.g., Oil saturation = oil-volume / pore-volume

10 Petroleum Reservoir Modeling

11 Reservoir Modeling Process Well Data: Core, Logs Seismic Data Fluid Data Rock Data Upscalling Simulation Model Well Data + Oil/Gas/Water Production Geologic Model

12 Logs + Core Data Mohaghegh, 2000, SPE 58046

13 Logs + Seismic Data Mohaghegh, 2005, SPE AmplitudeNeutron porosity: Well 1 and 2

14 Examples and Projects: A Synthetic Reservoir Model

15 Permeability Model size: 24 x 25 x 15 Wells: 25 prodjcers 1 water injector

16 Permeability

17 Initial Oil Saturation

18 Oil Saturation (2 years) Initial So

19 Gas Saturaton (2 years) Initial Sg

20 Field Production Rates

21 Well-13 Production Rates

22 Well-15 Production Rates

23 Well-17 Production Rates

24 Forecast Oil Production

25 Forecast Oil Prod. – 2 nd year Data

26 Other History Match Examples Da Silva, et al., 2007, SPE Well PH-01 Results Production Data

27 Project 1: Estimate Field Oil Production Rate Data: oil rates vs. time –0 – 300 days: all wells at maximum rates –300 – 360 days: all wells at reduced rates of 100 b/d –360 – 3653 days: all wells at maximum rates Task: –Use 3-year data (0 to 1,096 days), estimate field production rates to 10 years. ?

28 Oil Saturation > 0.65 (6 years)

29 Gas Saturation < 0.15 (6 years)

30 In-fill Well? So>0.65, 6-year Sg<0.15, 6-year

31 Project 2: In-fill Well Location Data –Pore-volume map –Oil saturation map at the 6 th year –Well locations –Oil Volume = Pore-Volume x Oil-Saturation Task –Find a new well (I,j,k) location that can give highest initial oil production rate

32 Well Locations * * WATER INJECTION WELL * I J K WELL * * ALL PRODUCTION WELLS WELL …

33 Oil Saturation Maps OIL SATURATION DISTRIBUTION TIME: DAYS OR YEARS -- TIME STEP NO.: 50 J = 1 I = K P P P ……. J = 1 I = K P P P …….

34 Questions?


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