Drilling trajectory control method based on stratum center lines

Abstract

The invention provides a drilling trajectory control method based on layer center lines, and belongs to the field of oil and gas development and exploration. The drilling trajectory control method comprises the steps that first, three-dimensional seismic data are collected and processed to form a seismic profile map; second, trace data in the seismic profile map are subjected to 0-1 scale settingto form seismic trace data composed of 0-1; third, vectorization is conducted on the upper interface and the lower interface of a target stratum; fourth, center lines, namely the stratum center lines,of the upper interface and the lower interface of the target stratum are obtained; fifth, the layer center lines are subjected to curve sectioned linearization to obtain the starting coordinate point, the end coordinate point and the linear equation of each section to form a linear equation set; sixth, according to the linear equations of all the sections, the drilling dip angle and drilling distance of each section are obtained; and seventh, the starting coordinate points and the end coordinate points of all the sections are sequentially connected to form the optimum drilling trajectory.

Description

technical field [0001] The invention belongs to the field of oil and gas development and exploration, and in particular relates to a drilling trajectory control method based on a layer centerline, which is used to obtain the drilling inclination and drilling distance during the drilling process, so as to guide drilling engineers to quickly and accurately adjust the drilling trajectory. Background technique [0002] At present, geosteering technology has been widely used in the field of drilling exploration and development technologies such as oil and natural gas, and in the process of horizontal well operations. At present, in the process of horizontal drilling construction, the control requirements for drilling trajectory are relatively high, especially after entering the reservoir, the requirements for drilling control are relatively high, and it is necessary to ensure that the trajectory passes through the layer. There are already many mature technologies in the design an...

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Problems solved by technology

[0004] There are many researches on the control technology of the drill bit trajectory at home and abroad, but there are few studies on how to quickly and effectively realize the rapid calculation of the trajectory of the hole to be drilled with rapid response through software, especially for the realization of effective, accurate, real-time, low-cost unmanned Attended automated drilling offers solutions for less

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