A Drilling Trajectory Control Method Based on Layer Centerline

A trajectory control and centerline technology, applied in the automatic control system of drilling, drilling equipment, earthwork drilling and production, etc., can solve the problems of less rapid calculation and research, shorten the construction time, increase the drilling rate, and increase the oil and gas yield effect

Active Publication Date: 2021-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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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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  • A Drilling Trajectory Control Method Based on Layer Centerline
  • A Drilling Trajectory Control Method Based on Layer Centerline
  • A Drilling Trajectory Control Method Based on Layer Centerline

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Embodiment Construction

[0058] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0059] The invention proposes a method for the trajectory of the borehole to be drilled that can respond quickly, and the method can be efficiently realized through computer software programming. Through this method, in the process of establishing the trajectory of the borehole to be drilled, the centerline position of the formation is calculated according to the interface information of the horizontal section of the formation to be drilled, and the optimal drilling inclination is calculated according to the coordinate information of the centerline, which is used to control and adjust the drilling trajectory.

[0060] The present invention is achieved by adopting the following technical solutions:

[0061] Step 1: 3D seismic data collection and processing

[0062] A seismically processed time-domain or depth-domain 3D seismic data volume of the drilled area is collec...

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Abstract

The invention provides a drilling trajectory control method based on a layer center line, belonging to the field of oil and gas development and exploration. The method comprises: the first step: collecting and processing three-dimensional seismic data to form a seismic profile; the second step: performing a 0-1 scale on the trace data in the seismic profile to form seismic trace data composed of 0-1; Step 3: Vectorize the upper and lower interfaces of the target stratum; Step 4: Obtain the midline of the upper and lower interfaces of the target strata, that is, the layer midline; Step 5: Perform curve segmental linearization on the layer midline Obtain the starting coordinate point and ending coordinate point of each segment and the straight line equation of each segment to form a set of straight line equations; the sixth step: obtain the drilling inclination and drilling distance of each segment according to the straight line equation of each segment; seventh Step: Connect the starting coordinate points and ending coordinate points of each segment in sequence to form the best 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B44/00
CPCE21B44/00
Inventor 王卫倪卫宁李永杰吴非徐向谭淙文卢坤辉叶鑫车世琦
Owner CHINA PETROLEUM & CHEM CORP
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