# The first four questions refer to the following two plots: Test 6:...

## Transcribed Text

The first four questions refer to the following two plots: Test 6: Flow Test - Semilog Plot of Drawdown 3,400 3,300 3,200 3,100 3,000 2,900 2,800 2,700 0.01 0.1 1 10 100 1000 t, hrs Test 6 Flow Test - Cartesian Plot of Raw Data 3,400 3,350 3,300 3,250 3,200 3,150 3,100 3,050 3,000 2,950 2,900 2,850 2,800 2,750 2,700 20 40 60 80 100 120 140 160 180 t, hrs 1. At what time did the flow go from infinite acting to pseudo steady state? 2. Given the additional data below, for a well in the center of a large, mostly homogenous reservoir, what is k and s? q = 75 STB/D pi = 3394.81 psia h = 11 ft o = 0.099 I'w = 0.48 ft Bo = 1.303 bbl/STB Ct = 1.44E-5 psi¹ o = 1.324 cp 3. What additional parameters can you determine from this test? a. none b. initial pressure c. drainage area radius d. average pressure 4. Determine the parameter or parameters you selected in the previous question. The next three questions refer to the following plot Test 8 Semilog Buildup 9,000 8,500 8,000 67,500 7,000 6,500 6,000 1 10 100 1,000 10,000 (tp+At)/At, hrs 5. With the following additional data, find k and S qo = 225 BOPD tp = 144 hr pwf = 6,399.7 psia h = 5 ft o = 0.079 rw = 0.33 ft Bo = 1.261 bbl/STB 8.45E- Ct = 06 psi-1 o = 2.43 cp 6. Find p* 7. Considering the graph can you use p* as an estimate for pi? Why or why not? The next two questions refer to the following plot 100 Ap=262 = psi Coess7710° pd = 10 1,000 Match point p PD 1 t =0.0546 1,000 eq teg 0.01 tD/C/= 1 100,000 tp/Cp 8. Considering the match, and without doing any calculations, do you think the skin factor would be positive, negative or zero? 9. Using the matched type curve below, find k and S for the well test, given the following additional information. q= 150 STB/D pi = 3394.81 psia h = 20 ft d = 0.15 rw = 0.33 ft B. = 1.15 bbl/STB Ct = 1.25E-5 psi-1 = 1.4 cp

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