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Shale gas horizontal well self-adaptive track forming method

An adaptive, horizontal well technology, applied in drilling equipment and methods, drilling equipment, directional drilling, etc., can solve the problems of low composite ratio of the whole well and high difficulty in preventing collision in shallow layers of shale gas cluster wells. The effect of reducing lifting and straightening, reducing the difficulty of directional construction and improving drilling efficiency

Pending Publication Date: 2022-02-08
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an anti-collision method that can naturally drift to solve shallow layer anti-collision and make full use of the natural deflection law to improve the whole Adaptive trajectory formation method for shale gas horizontal wells with compound ratio of well intervals

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  • Shale gas horizontal well self-adaptive track forming method
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  • Shale gas horizontal well self-adaptive track forming method

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Embodiment Construction

[0020] The method for forming an adaptive trajectory of a shale gas horizontal well according to the present invention will be further described in detail below in combination with specific embodiments.

[0021] The method for forming the self-adaptive trajectory of a shale gas horizontal well according to the present invention is based on the actual effect of variable well inclination and variable orientation based on the compound drilling process, and uses actual drilling data in the work area to determine the natural deflection law and The ability of directional deflection is combined with the design of compound drilling and directional drilling to form an adaptive trajectory formation method based on multi-segment arcs, which mainly involves the following three stages.

[0022] Stage 1: Analysis of actual drilling of adjacent wells

[0023] The specific steps are:

[0024] A. Data collection of actual drilling of adjacent wells: geological stratification (or small layers)...

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Abstract

The invention discloses a shale gas horizontal well self-adaptive track forming method. On the premise of the actual condition that the composite drilling process is variable in well inclination and direction, the natural deflecting rule and the directional deflecting capacity of different stratums in a work area are determined through actual drilling well data in the work area, and the self-adaptive track forming method based on the multiple sections of arcs is formed by matching the composite drilling well design and the directional drilling well design. The method is advantaged in that shallow anti-collision pressure is effectively reduced, the full-well-section composite drilling proportion is increased, the full-well drilling period is shortened, the average mechanical drilling speed is increased, and therefore safe and efficient drilling is achieved.

Description

technical field [0001] The invention relates to a shale gas horizontal well drilling construction technology, in particular to a method for forming an adaptive trajectory of a shale gas horizontal well by making full use of the changing laws of drilling trajectories in different formations. Background technique [0002] The resource potential of shale gas reservoirs in my country is huge, and accelerating the process of shale gas development has become one of the important means to stabilize my country's oil and gas production. The application of cluster horizontal wells has effectively accelerated the development process of shale gas, but the theorization of the designed trajectory has aggravated the difficulty of anti-collision control of the actual drilling trajectory, which has restricted the improvement of drilling speed and efficiency. [0003] In the prior art, the methods for forming the trajectory of shale gas cluster wells are mainly: (1) five-section trajectory de...

Claims

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Application Information

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IPC IPC(8): E21B7/04
CPCE21B7/046
Inventor 彭兴丁锦鹤曹建山朱智超冯大鹏龙志平贺庆胡进科
Owner CHINA PETROLEUM & CHEM CORP
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