List of top Petroleum Engineering Questions asked in GATE PE

Which of the following approaches is/are used to get the response of a Formation Micro Scanner (FMS) log?
For a given reservoir of porosity \( \phi = 0.1 \), the water saturation is equal to the irreducible water saturation. The BVI (Bulk Volume Irreducible) water saturation was estimated as 0.04 using NMR (Nuclear Magnetic Resonance) log.
The permeability, k in mD, is estimated using the relation \[ k = 10^4 \phi^4 \left(\frac{FFI}{\phi - FFI}\right)^2 \], where FFI is the Free Fluid Index.
Based on this information, the permeability (in mD) is __________. (Rounded off to two decimal places)
An oil has a density of 50 lbm/ft3 at Standard Temperature and Pressure (STP) conditions. The density of the oil (in oAPI) is ________. [Given: water density is 62.4 lbm/ft3 at STP]
For a radioactive material, if N is the number of nuclei present at time t, and \(\lambda\) is decay constant, which of the following is/are CORRECT representation(s) of the rate of decay?
When 92 ml of distilled water (density = 1.0 g/cm3) is mixed with 23 grams of NaCl salt, the density of the resultant brine solution is 1.15 g/cm3. The volume of the brine solution (in ml) is _________.
A conventional Sucker Rod Pumping (SRP) unit is used to lift 25 API oil from a depth of 5000 ft. During operation, the maximum and minimum values of the polished rod load are recorded as 14300 lbf and 5200 lbf respectively.
The ideal counterbalance load (in lbf) is _________ (answer in integer).
Which of the following logging methods is/are NOT used for investigation in Cement Bond Logging (CBL)?
Oil is produced from an undersaturated oil reservoir that has no initial gas cap. The reservoir rock compressibility and connate water saturation effects are considered negligible. There is no water influx into the reservoir and no water production. The initial oil formation volume factor was 1.24 RB/STB. After producing the reservoir for a short period, while the reservoir pressure is still above the bubble point pressure, the oil formation volume factor changed to 1.25 RB/STB. The calculated oil recovery factor (in fraction, rounded to three decimal places) is ________.
For a single-phase dry gas reservoir having a well producing only dry gas, \(E\) represents gas expansion factor and \(B_g\) represents gas formation volume factor. Which of the following options is CORRECT?
One dimensional oil flow occurs in a horizontal porous medium of length 2000 ft, with a constant cross sectional area of 6000 ft\(^2\) and absolute permeability of 50 mD. The oil has a viscosity of 2 cP and flows along the length of the medium. The pressure at the inlet is 2500 psig and at the outlet is 2200 psig. Using Darcy's equation for single phase, linear flow, the flow rate of oil (in bbl/day, rounded to one decimal place) is _______. [1 bbl = 5.61 ft\(^3\)]
Which of the following conditions is/are inferred using cross plots of neutron porosity (\(\phi_N\)) and density porosity (\(\phi_D\))?
Choose the correct option by matching the entries in Group X with their description in Group Y.
Group XGroup Y
(P) Gas hydrate(I) Gas is mostly present in adsorbed state
(Q) Oil shale(II) Sedimentary rock contains kerogen
(R) Coal bed methane(III) Oil recovered from shale
(S) Shale oil(IV) Gas is present inside the cages formed by water molecules
The sectional view of three different damaged regions (marked P, Q and R) near the vicinity of a perforation is shown in the figure above. Choose the correct option matching the entries in GROUP X with the corresponding terms in GROUP Y.

GROUP X
P
Q
R

GROUP Y
(I) Grain fracturing
(II) Charge and core debris
(III) Compacted pulverized zone
Which of the following is the basic mechanism of hydrocyclones and centrifuges used for solids control in a drilling operation?
Real gas pseudo pressure is used to derive the diffusivity equation for a highly compressible fluid, for which viscosity \(\mu\) and gas compressibility factor \(Z\) are functions of pressure \(p\). Which of the following represents the partial derivative of the real gas pseudo pressure with respect to time \(t\)?
Choose the CORRECT match of sedimentary rocks in GROUP X with their processes/mechanisms of formation in GROUP Y.
GROUP XGROUP Y
(P) Evaporite(I) Physical process mainly consisting of lithification/cementation of deposition
(Q) Sandstone(II) Chemical process and depositions by marine living organisms
(R) Limestone(III) Anaerobic deposition of organic materials in mud bed
(S) Siltstone(IV) Evaporation and precipitation of marine water
Which of the following is the role of stabilizer subs in the rotary drilling process?
Which of the following logging methods in a borehole will provide the highest depth of investigation for a given marine formation?
Which of the following improve(s) the productivity index of a vertical well producing from an oil reservoir?
A drill string in a wellbore is composed of 6000 ft of drill pipe with an internal diameter of 4.67 inches. Drilling fluid is pumped at a rate of 80 cycles per minute, with a pump factor of 0.21 bbl/cycle. The amount of drilling fluid held in the drill collar and drill bit assembly may be assumed negligible. The time required to circulate the drilling fluid from the surface to the drill bit (in minutes, rounded to two decimal places) is ______. [1 bbl = 5.61 ft\(^3\)]
Pressure (p) as function of radius (r) and time (t) can be found from the analytical solution of radial diffusivity equation for homogenous and isotropic reservoir following Darcy law. For this solution, if dp/dt is treated as constant, which of the following correctly describe(s) the state(s) of pressure change?
Which of the following options is/are representing the rheological behavior of a conventional drilling fluid?
Which of the following is/are conventional Enhanced Oil Recovery (EOR) method(s)?
The Inflow Performance Relationship (IPR) for a vertical well in a single-phase oil reservoir was found to be linear. The flowing bottomhole pressures are 4000 psi and 1000 psi at oil flow rates of 200 STB/day and 600 STB/day, respectively.
At the flowing bottomhole pressure of 2875 psi, the value of flow rate (in STB/day) is __________. (Answer in integer)
[STB: Stock Tank Barrel]
Which of the following is/are obtained using a core sample?