A kind of drilling method of horizontal well

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 Measure While Drilling, a tool for measuring wellbore trajectory parameters while drilling) and ground control system to implement the MWD system (such as the common GE -MWD 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 tool steering signal is t...

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