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Downhole drilling trajectory microseism description method

A micro-seismic and trajectory technology, applied in construction and other directions, can solve the problems of shrinkage, difficulty in pulling out the drill pipe, and inability to pull out.

Inactive Publication Date: 2015-08-12
HEBEI COAL SCI RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the commonly used downhole drilling trajectory description method is the logging instrument method. However, in deep mine areas with high in-situ stress anomalies, downhole borehole collapse and shrinkage are serious. Sometimes the drill pipe is difficult to pull out or not at all, conventional logging is not possible at all

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Embodiment Construction

[0022] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

[0024] The invention di...

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Abstract

The invention discloses a downhole drilling trajectory microseism description method, and relates to the technical field of downhole drilling description methods. The method comprises the steps that 1, a set of microseism detectors are arranged on the periphery of the downhole drilling hole position and connected to downhole microseism collection substations through cables, and therefore a complete monitoring unit is formed; 2, the downhole collection substations are connected with a mine looped network through optical fibers, and monitoring data are transmitted to a ground main server in real time to be analyzed and processed; 3, the ground main server describes and displays the drilling trajectory according to the microseism event time-space distribution situation caused by drilling and rock breakage. The downhole drilling trajectory microseism description method can describe the downhole drilling trajectory with no well measuring conditions, is accurate in description, is used for follow-up search, and has the great practical significance.

Description

technical field [0001] The invention relates to the technical field of description methods for downhole boreholes, in particular to a method for describing downhole borehole trajectories when the downhole borehole collapses and shrinkage is serious in areas with high abnormal geostress in deep mines and logging conditions are not available. Background technique [0002] Due to the influence of many factors such as underground construction environment conditions, rock structure, construction technology, etc., the underground drilling trajectory often has a large deviation from the design. Sometimes the position deviation of the end hole of a 120m deep hole may exceed 30-40m, so that it is impossible to obtain The required data, or draw a conclusion that deviates greatly from the actual or even completely opposite. [0003] At present, the commonly used downhole drilling trajectory description method is the logging instrument method. However, in deep mine areas with high in-si...

Claims

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Application Information

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IPC IPC(8): E21B47/0224
Inventor 刘建功李玉宝啜晓宇赵立松孙新博孟凡岭路光王丹
Owner HEBEI COAL SCI RES INST
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