Drilling Problems and Well Control - Oil and Gas Well Drilling Technology - Petroleum Engineering Previous Year Questions

1

2016 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2016

Which of the following is the MOST COMMON cause for a fishing job?

A

Differential sticking

B

Use of oil based mud

C

Lost circulation

D

Well kick

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2

2016 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2016

Match the entries in Group 1 with those in Group 2

Group 1	Group 2
P. Blow Out Preventer	I. Horizontal well problem
Q. Diamond bit	II. Reverse ballooning
R. Tubing elongation	III. Well control
S. Eccentricity	IV. Crown
	V. Ballooning

A

P-III, Q-IV, R-V, S-II

B

P-V, Q-IV, R-I, S-II

C

P-III, Q-IV, R-II, S-I

D

P-IV, Q-III, R-V, S-I

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3

2017 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2017

A student has written following possible causes of lost circulation during a drilling operation.
i. High salinity in the reservoir
ii. Fracture in the reservoir
iii. A fault encountered during drilling
iv. Low viscosity of the reservoir fluid
Which of the above statements are correct?

A

i, iv

B

ii, iii

C

i, iii

D

ii, iv

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4

2018 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2018

Primary and secondary indicators of kick in a well where the indicators are:
1) flow rate increase,
2) gas, oil or water-cut muds,
3) pit volume increase,
4) flowing well with mud pump shut-off,
5) reduction in drill-pipe weight,
6) drilling break.

Which one of the following presents the correct combination?

A

Primary (1, 3, 5) and Secondary (2, 4, 6)

B

Primary (1, 2, 3) and Secondary (4, 5, 6)

C

Primary (1, 2, 4) and Secondary (3, 5, 6)

D

Primary (1, 3, 4) and Secondary (2, 5, 6)

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5

2020 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2020

Q.No. 49 A gas reservoir has a permeability of 1.0 mD, which is to be fractured hydraulically to create a 600 m long and 0.30 cm wide fracture of 2×10⁵ mD permeability around the center of damage area. The fracture conductivity for the well (rounded off to two decimal places) is ______.

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6

2021 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2021

During a drilling operation, kick occurs if

A

the shear ram in the Blow Out Preventer (BOP) does not work.

B

the formation pressure is equal to the drilling fluid pressure.

C

the volume of the mud used to fill the hole is less than that of the pipe being pulled out.

D

the formation pressure is more than the drilling fluid pressure.

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7

2022 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2022

The dynamic mud inflow rate and mud outflow rate profiles are shown in the following figure.

Identify the “Hole ballooning” and the “Lost circulation” phenomena.

A

Case 1 – Hole ballooning; Case 3 – Lost circulation

B

Case 2 – Lost circulation; Case 3 – Hole ballooning

C

Case 1 – Lost circulation; Case 2 – Hole ballooning

D

Case 2 – Hole ballooning; Case 3 – Lost circulation

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8

2022 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2022

An oil well is drilled using an 8.5-inch drill bit at a penetration rate of 30 ft/hr. The rotary speed is 20 rpm and the weight on the bit is 3500 lb. The value of the d exponent for the drilled section is ________ (rounded off to two decimal places).

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9

2025 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2025

The hydrostatic pressure gradient in a vertical well drilled in a relaxed depositional basin is 0.452 psi/ft. Assume that the gradient of effective horizontal stress with depth is constant in the drilling zone and has a value of \(9.96 \times 10^{-2}\) psi/ft. The casing shoe is at 4000 ft depth.
While drilling the bore hole below the casing shoe with 10 ppg mud, the maximum allowed standpipe pressure is ______ psi (rounded off to one decimal place).
(Note: 1 ppg mud is equivalent to 0.052 psi/ft.)

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10

2023 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2023

Which of the following option(s) is/are indication(s) of a well kick?

A

Decrease in mud pit volume

B

Increase in mud pit volume

C

Decrease in pump pressure

D

Increase in pump pressure

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11

2026 · Petroleum Engineering · Oil and Gas Well Drilling Technology · Drilling Problems and Well Control

Petroleum Engineering (PE) 2026

A matrix acidizing job is planned on a sandstone pay zone at a depth of 7000 ft without formation breakdown by keeping a safety margin of 250 psi with the help of a coil tubing unit. Consider the fracture gradient of 0.7 psi/ft, average specific gravity of the injection fluid as 1.065, and frictional pressure drop of 200 psi.
The maximum surface injection pressure (in psi) is __________. (Rounded off to one decimal place)
[Given: Hydrostatic gradient (psi/ft) = 0.433 × Specific Gravity]

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