Question 1:

An oil well produced 500 bbl/d with a flowing BHP of 2500 psi. If the average reservoir pressure is 3000

psi find the maximum possible rate from the well. Also find the production rate when the producing

pressure dropped to 1200 psi. Also find the maximum rate if a linear relationship is assumed. The bubble

point pressure is 3000 psi.

Question 2:

A well is producing from a reservoir having an average reservoir pressure of 2085 psig. A stabilized

production test on the well resulted in a producing rate of 282 STB/day when the flowing bottom-hole

pressure was 1765 psig. The bubble point pressure is 2100 psig. Using constant PI, Vogel’s, and

Fetkovich’s equations, calculate:

i) the producing rate if Pwf is reduced to zero

ii) the producing rate if Pwf is reduced to 1485 psig

iii) the bottom-hole pressure necessary to obtain an inflow rate of 400 STB/day

iv) the complete IPR

Question 3:

The following data pertain to an under-saturated reservoir:

a) Generate an IPR.

If the well is retested and

b) Generate an IPR using this test data.

Question 4:

A flow-after-flow test was conducted on a well producing from a reservoir in which .

The test results were:

qo (STB/day) Pwf (psia)

263 3170

383 2897

497 2440

640 2150

Construct a complete IPR for this well and determine qo(max).

Question 5:

A well and reservoir have the following completion and reservoir data. The flow is all oil. Depth of tubing = 6000 ft Average reservoir pressure, Pr = 2700 psi PI (linear) = 2.3 b/d/psi Wellhead pressure, Pwh = 160 psi Gas liquid ratio = 400 scf/b Tubing diameter = 4 in Determine the operating point.