September 2023

In an oil well, the pressure at the gas oil contact (GOC) at a depth of 2000 m is 205 bar (gauge), as shown in the figure

In an oil well, the pressure at the gas oil contact (GOC) at a depth of 2000 m is 205 bar (gauge), as shown in the figure

Q. In an oil well, the pressure at the gas oil contact (GOC) at a depth of 2000 m is 205 bar (gauge), as shown in the figure. The static oil pressure gradient is 0.08 bar/m in the pay zone. If a constant hydrostatic pressure gradient of 0.1 bar/m prevails throughout the subsurface, then the

In an oil well, the pressure at the gas oil contact (GOC) at a depth of 2000 m is 205 bar (gauge), as shown in the figure Read More »

A pressure build-up test was conducted in a well after 1000 days of producing oil at a constant rate of 0.01 reservoir-m3/s

A pressure build-up test was conducted in a well after 1000 days of producing oil at a constant rate of 0.01 reservoir-m3/s

Q. A pressure build-up test was conducted in a well after 1000 days of producing oil at a constant rate of 0.01 reservoir-m3/s. The two shut-in bottom-hole pressure readings taken at 0.5 day and 1 day after shut-in are 150 × 105 Pa and 151 × 105 Pa, respectively. These pressure points correspond to the

A pressure build-up test was conducted in a well after 1000 days of producing oil at a constant rate of 0.01 reservoir-m3/s Read More »

Which one of the following options is NOT a part of the mudlogs prepared by the drill-site geologist?

Which one of the following options is NOT a part of the mudlogs prepared by the drill-site geologist?

Q. Which one of the following options is NOT a part of the mudlogs prepared by the drill-site geologist? (A) Rate of Penetration (ROP) (B) Chromatograph showing presence of C1 to C5 concentration (C) Lithology from drill cutting and its interpretation (D) Reservoir unit delineation based on volume of shale (Vsh) Ans: Reservoir unit delineation

Which one of the following options is NOT a part of the mudlogs prepared by the drill-site geologist? Read More »

A single well encounters multiple clean sands of exactly the same thickness porosity and permeability

A single well encounters multiple clean sands of exactly the same thickness porosity and permeability

Q. A single well encounters multiple clean sands of exactly the same thickness, porosity and permeability. Rw is the formation fluid resistivity and Rmf is the mud filtrate resistivity. P. Rmf > Rw                                    I.    No deflection Q. Rmf = Rw                                   II. Positive deflection R. Rmf < Rw                                    III. Negative deflection Which one of the following

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