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Method for identifying drilling remaining sleeve based on high-precision magnetic method measurement

A technology of high-precision magnetic method and identification method, which is applied in the field of casing identification in boreholes based on high-precision magnetic method measurement, can solve problems such as spending a lot of time, difficult to confirm the drilling position, and affecting the progress of the project, so as to achieve search efficiency High, high precision, narrowing effect

Inactive Publication Date: 2020-03-24
SHANDONG PROVINCIAL COAL GEOLOGICAL PLANNING EXPLORATION & RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In summary, the problems in the prior art are: but in the existing drilling construction, if the buried drilling time course is to be searched after a long time, the drilling position is difficult to confirm. A lot of time is spent in the detection, which affects the progress of the project

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  • Method for identifying drilling remaining sleeve based on high-precision magnetic method measurement

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Embodiment Construction

[0018] In order to further understand the invention content, features and effects of the present invention, the following examples are exemplified and described in detail with reference to the accompanying drawings.

[0019] The structure of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the method for identifying casings left over from boreholes based on high-precision magnetic measurement provided by the embodiments of the present invention includes the following steps:

[0021] S1. Determine the past excavation situation and the location of the excavation on a large scale;

[0022] S2, determine the specific position of the borehole through daily change measurement and mobile measurement;

[0023] S3. Carry out modeling analysis on the casing, and analyze the relationship between the ground magnetic induction intensity and the model volume;

[0024] S4. Carry out actual measuremen...

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Abstract

The invention belongs to the technical field of drilling position detection, and discloses a method for identifying a drilling remaining sleeve based on high-precision magnetic method measurement. Themethod comprises the following steps of determining the previous excavation condition and the excavation position in a large range; determining the specific position of the drilling through daily change measurement and movement measurement; performing modeling analysis on the sleeve, and analyzing the relationship between the ground magnetic induction intensity and the model volume; performing actual measurement analysis; and performing analysis in combination with different actual conditions, and further determining the existence position of the magnetic body. According to the method, two high-precision proton magnetic instruments are used for measurement; the position of the drilling remaining sleeve is determined in a large range for measurement; the range is narrowed, meanwhile, afterthe range is further narrowed, a model is manufactured, simulation measurement is conducted, field measurement is conducted after simulation is completed, the drilling remaining sleeve is rapidly found out by determining the induction relation between the magnetic induction intensity and the magnetic body buried in the ground, the searching efficiency is high, and the precision is high.

Description

technical field [0001] The invention belongs to the technical field of drilling position detection, and in particular relates to a method for identifying casings left in drilling based on high-precision magnetic measurement. Background technique [0002] Drilling refers to the operation of machining a hole in a solid material with a drill. Here is a description of the drilling work in the exploration work, as well as the auxiliary tools needed for drilling and some emergency measures. In geological exploration work, drilling equipment is used to drill a columnar hole with a small diameter and a large depth underground, also known as drilling. Boreholes for oil and gas and groundwater are larger in diameter. The diameter and depth of the borehole depend on the burial depth of geological minerals and the purpose of the borehole. [0003] In summary, the problems in the prior art are: but in the existing drilling construction, if the buried drilling time course is to be sear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/22
CPCB23Q17/22
Inventor 朱裕振邵玉宝王秀东周明磊田思清汝亮沈立军孙超林羽
Owner SHANDONG PROVINCIAL COAL GEOLOGICAL PLANNING EXPLORATION & RES INST
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