Match each well profile feature with its definition

  1. Occurs after a buildup where the inclination of the borehole is held constant for a certain distance b) The azimuth angle measured from North or South in the direction of East or West c) A point defined by a distance and a direction relative to North d) Used to give a target's position in feet or meters with direction of North/South and East/West e) The location where the wellbore has finished increasing
  2. Tangent Section
  3. Polar Coordinate
  4. Rectangular Coordinate
  5. Quadrant
  6. End of Buildup

Introduction to Directional Drilling Revised: 10/20/98 6:37 AM 5.2 Types of Directional Well Profiles

In general, directional wells can be either:

  • Straight (Vertical),
  • S-type,
  • Slant (J-type), or
  • Horizontal.

The type of profile selected will depend upon the geological objectives and the production mechanism of the well.

Vertical Wells

5.2.1 Straight Well (Vertical)

Straight wells have a bore with no planned deviation from vertical.

5.2.1 Straight Well (Vertical)

Straight wells have a bore with no planned deviation from vertical.

Type Directional Well

5.2.2 S-Type Well

S-type wells have a bore with a straight section, a build section, a tangent section, and a drop section.

This type of well is drilled to improve the efficiency of the well and to assist in the location of a blown-out well. In offshore drilling, S-type wells can ensure accuracy in bottomhole spacing when multiple wells are drilled from the same platform.

Straight

Section

Tangent Section

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Slant wells, sometimes called J-type wells, have a bore with a straight section, a build section, and a tangent section straight to the target

Slant or J-type wells are drilled where it is not desirable or possible to locate the surface location directly above the target or a multiwell platform.

What The Build Section Well

5.2.4 Horizontal Well

Horizontal wells have a bore with a straight section, a build section, tangent section, a second build section (most of the time), and a horizontal section.

The well is drilled to a point above the reservoir; then it is deflected and the angle increases until it reaches 90 degrees or more. When properly applied, one horizontal borehole can produce a reservoir better than several vertically drilled wells.

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Responses

  • timoteo
    What is the build section of a well?
    8 years ago
  • Ulla
    What is a slant or J Well?
    5 years ago
  • hildibrand
    How they profile directional drilling?
    4 years ago

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