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Measuring-while-drilling device and method for distance and azimuth positioning between adjacent wells

A measurement-while-drilling and distance technology, applied in the field of drilling and production exploration engineering, can solve problems such as the inability to provide inter-well distance and orientation information, and the increase of error accumulation.

Active Publication Date: 2021-01-08
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0004] However, in the traditional technology, with the increase of the measurement depth, the accumulation of measurement errors increases, resulting in the inability to provide accurate distance and azimuth information between wells

Method used

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  • Measuring-while-drilling device and method for distance and azimuth positioning between adjacent wells
  • Measuring-while-drilling device and method for distance and azimuth positioning between adjacent wells

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Embodiment Construction

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It is to be understood that the terms "length", "width", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inner", "outer" and other indicated orientations...

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Abstract

The invention provides an adjacent inter-well distance and azimuth positioning measurement-while-drilling device and method. The device comprises a central control current emission control and acquisition unit, two triaxial low-frequency magnetic detection units and two current electrode units; a measurement-while-drilling tool receives an optimal frequency point input by a machine worker on the ground, the measurement-while-drilling tool sends the optimal frequency point to the central control current emission control and acquisition unit, and the central control current emission control andacquisition unit emits low-frequency excitation current according to the optimal frequency point; and the central control current emission control and acquisition unit controls an excitation mode to be set into an upper electrode backflow mode, a lower electrode backflow mode, a full loop backflow mode and a double loop backflow mode, the magnetic field intensity of an alternating magnetic field excited by a casing of a target well in each mode is acquired, according to the magnetic field intensity of the alternating magnetic field excited in each mode, the distance and the direction between aset point of a positive drilled well and a target well are calculated, and the distance and the direction between the wells can be accurately measured.

Description

technical field [0001] The invention relates to the technical field of drilling and exploration engineering, in particular to a measuring device and method for distance and azimuth positioning between adjacent wells while drilling. Background technique [0002] "Complex well" is a new drilling technology, including rescue wells, cluster wells, multilateral wells and dual horizontal wells, etc. Due to the existence of multiple boreholes, the distance and azimuth between the drilling well and adjacent wells are One of the key technologies for its realization. [0003] At present, the traditional method of distance and azimuth positioning between wells mainly scans the borehole trajectory information to measure the distance and azimuth between wells corresponding to different well depths. [0004] However, with the increase of the measurement depth in the traditional technology, the accumulation of measurement errors increases, resulting in the inability to provide accurate di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/30E21B47/00E21B47/01E21B47/09
CPCE21B43/30E21B47/00E21B47/01E21B47/09
Inventor 颜肖平梁华庆
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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