Posted: September 13th, 2017
Petroleum Engineering
PE4511 Homework #1 Name ClassID
- (5 points) What is primary production, secondary and tertiary production?
- (10 points) Please draw a typical black oil phase diagram, label the important points and lines talked about in the class and specify the isothermal production procedure for a saturated reservoir.
- (25 points) Experiments were made on a bottom hole sample of the reservoir liquid taken from the LaSalle Oil Field to determine the solution gas and the formation volume factor as functions of pressure. The initial bottom-hole pressure of the reservoir was 3600 psia, and the bottom-hole temperature was 160°F; so all measurements in the laboratory were made at 160° The following data, converted to practical units were obtained from the measurements:
Please do the following based on the data given:
- (3 pts) Please plot the gas in solution versus pressure
- (5 pts) Please determine if the reservoir was saturated or not in its original condition? Does the reservoir originally have a gas cap? Please explain your answers.
- (2 pts) In the region of 200 to 2500 psia, determine the solubility of the gas from your graph in SCF/STB/psi.
- (10 pts) Plot the formation volume factor versus pressure. Explain why the slope is negative and smaller when pressure is above the bubble-point pressure compared with the slope when pressure is below the bubble point pressure?
- (5 pts) If the reservoir contains 250 MM reservoir barrels of oil initially, what is the initial number of STB in place? What is the initial volume of dissolved gas in standard condition?