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Well drilling method for horizontal well

A horizontal well and drilling technology, which is applied in the field of horizontal well drilling, can solve the problem of the deviation of the drilling trajectory from the predetermined trajectory, and achieve the effect of high coincidence rate

Active Publication Date: 2016-05-18
PETROCHINA CO LTD
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Problems solved by technology

[0004] The present invention aims to provide a drilling method for horizontal wells to solve the problem that the drilling trajectory deviates from the predetermined trajectory in the prior art

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  • Well drilling method for horizontal well
  • Well drilling method for horizontal well

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Embodiment Construction

[0028] The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the embodiments of the present invention. It should be noted that, in the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other . The present invention will be described in detail below in conjunction with examples.

[0029] As introduced in the background art section, there is a problem in the prior art that the drilling trajectory deviates from the predetermined trajectory during the drilling process. In order to solve this problem, in a typical implementation of the present invention, a drilling method for a horizontal well is provided, figure 1 A schematic flow chart of the drilling method is shown, and the drilling method includes the following steps:

[0030] S1, detecting magnetic declination value and borehole trajectory offset value;

[0031] S2, using MWD and ground co...

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Abstract

The invention provides a well drilling method for a horizontal well. The well drilling method for the horizontal well includes the following steps that S1, a magnetic declination value and a well track deviation value are detected; S2, the influence of the magnetic declination value on a well track deviation value signal is eliminated through a measure while drilling (MWD) system, and a return track of a drill bit is obtained; S3, a well drilling direction of the drill bit is corrected according to the return track of the drill bit; and S4, well drilling continues through the drill bit. The errors caused by magnetic declination are eliminated and the drilling direction of the drill bit is corrected repeatedly, so that the good coinciding rate of a well drilling track and a preset track is achieved.

Description

technical field [0001] The invention relates to the field of oil and gas, in particular to a drilling method for a horizontal well. Background technique [0002] At present, the drilling trajectory of conventional ultra-heavy oil fire flooding horizontal wells is controlled by a directional motor (Bohai Equipment Zhongcheng Machinery Manufacturing Branch, model ), non-magnetic drill pipe (Bohai Equipment Zhongcheng Machinery Manufacturing Branch, model Non-magnetic pressure-bearing drill pipe), MWD tool (here MWD refers to MeasureWhileDrilling, a tool for measuring wellbore trajectory parameters while drilling) and ground control system to implement the MWD system (such as the common GE-MWD of General Electric Company system). The vertical well is drilled first as the target point of the horizontal well, and then the horizontal well is drilled, but the vertical wellbore cannot be drilled. During directional drilling in the middle of the horizontal well section, the MWD ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/0228E21B7/04C23C24/10
Inventor 罗增张文波路宗羽刘颖彪
Owner PETROCHINA CO LTD
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