Three-dimensional directional well trajectory design and control parameter discrimination method

Abstract

The invention discloses a three-dimensional directional well trajectory design and control parameter discrimination method. The method includes: via relative coordinates of a target in a target horizon with respect to a tapered plane arc trajectory full-curve tangent midpoint, establishing discrimination criteria, and performing discrimination and valuing on a change amount of a design target hitting azimuth with respect to an azimuth of an arch trajectory start point; discriminating and valuing a design tool face angle via overlap criteria of values obtained by calculating through double formulas of tool face angle; according to the tool face angle obtained by discrimination, verifying targeted design parameters and targeted coordinates via trajectory backward inversion. Compared with traditional target parameter discrimination methods, the method helps prevent the problems that discrimination by directly using target closure azimuth difference causes 0-degree azimuth ambiguity and discrimination of the tool face angle according to functional rules of 0-degree to 360-degree quartering of different tool face angles may has deviations; the method is simple and highly applicable.

Description

technical field [0001] The invention relates to a three-dimensional directional well trajectory design and control parameter discrimination method, which belongs to the field of geological exploration and drilling engineering and the field of oil drilling and production oil and gas well engineering. Background technique [0002] The wellbore trajectory design parameters mainly refer to the design of the inclination angle and azimuth angle corresponding to the well depth of each well section in order to achieve the engineering purpose, and the wellbore in the underground is calculated from the designed inclination angle and azimuth angle of each well depth point. The trajectory coordinates of the space or draw the trajectory diagram of the borehole axis extension path; the wellbore trajectory control parameters generally refer to the tool face angle of the bottom hole dynamic deflection tool, and the different bottom hole dynamic deflection tool tool face angles have different...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the deficiencies in the prior art, the present invention provides a three-dimensional directional well trajectory design and control parameter discrimination method, which can solve the existing three-dimensional directional well trajectory design and control parameter discrimination methods. The ambiguity of the 0° azimuth angle in the judgment of the closed azimuth difference and the possible deviation in the judgment of the tool face angle according to the action law of the tool face angle in different quadrants from 0° to 360° make up for the existing three-dimensional determination. The insufficiency of the trajectory design and control parameter discrimination method is the development and improvement of the existing three-dimensional directional well trajectory design and control technology.

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