Directional and Advanced Drilling - Oil and Gas Well Drilling Technology - Petroleum Engineering Previous Year Questions

For a kick off operation, a directional well has to be drilled for an arc-length of 2500 ft to achieve an inclination of 50°.
The radius of curvature will be ______ ft.

In a directional well, the kick off point has a true vertical depth (TVD) of 1000 m and the end of buildup section has a TVD of 1200 m. The buildup section for directional drilling has a horizontal displacement of 200 m, after which the tangent section has inclination of 45°. A driller monitors the well from the surface location of the well and sees that the target has horizontal departure of 1000 m. The TVD of the deepest point of the well is ______ meters.

It is desired to drill a deviated well with ‘build and hold type’ trajectory. The kick-off point is at a vertical depth of 1500 ft from the surface and the rate of build is 2°/100 ft. At a true vertical depth (TVD) of 7500 ft, the net horizontal departure to the target is 2500 ft. The total measured depth is ______ ft.

The station survey data during the directional drilling at two locations are given below.

Survey location	Depth (m)	Inclination (α) (degree)	Azimuth (β) (degree)
A	4499	14.8	N19E
B	4530	13.5	N10E

Dogleg angle = cos^-1[cosα_A cosα_B + sinα_A sinα_B cos(β_A - β_B)]
The calculated dogleg severity (dogleg angle per 100 m of drilled section) is ______ (rounded off to one decimal place).

Four different multilateral well patterns (Forked, Branched, Dual opening and Splayed) are shown in the figure.
Which ONE of the following options correctly identifies the multilateral well patterns?

A horizontal well is planned with two radial sections to land the target at an angle of 90°. The total vertical depth (TVD) between the surface and the target is 8000 ft. The buildup rate is 6° per 100 ft in the first section and 9° per 100 ft in the second section. The total angle built by the second section is 30°.
The distance of the first kickoff point from the surface is ______ ft (rounded off to one decimal place).