Question

4. (30 pts) Table below listed some reading information from the log, please determine Rw using Rwa method assume that at least one of the three zone is water zone Determine the water saturation for each zone If the water saturation and porosity cutoff, shale volume are 45% and 15%, 20% respectively. The initial formation volume factor Boi-1.25 rbbl/stb and the drainage area is 100 acres, please determine the net pay thickness and oil-in-place. Notes, the formation is limestone formation If we know the depth of A is 4000 ft and its formation temperature is 100 °F. The formation water resistivity is 0.01 ohm-m at 60 °F, and a shallow resistivity device flush zone resistivity is 20 ohm-m. The mud filtrate resistivity is 1.5 ohm-m a What is residual oil saturation in this zone? 1- 2- 3- 4- Zone Thickness Rt Porosity Shale volume (96) 35 10 25 (ft) | (ohm-m) | 10 10 9.35 0 25 30 0.02

Answer 1

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(2 h. 35 VSn z 20%

These fore , These -re 25 | 02405-6 '26 depth A ft To id

-5 /60 3 333 o 65 SL095 (or or 96/