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Determination method and device of oil well distances

A determination method and technology for oil wells, which are used in earth-moving drilling, wellbore/well components, and production fluids, etc., can solve problems such as short effective detection distance, improve ranging distance and accuracy, enhance magnetic field strength, and measure accuracy. high effect

Pending Publication Date: 2018-08-24
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0004] The invention provides a method and device for determining the distance of an oil well to solve the problem of short effective detection distance

Method used

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  • Determination method and device of oil well distances
  • Determination method and device of oil well distances
  • Determination method and device of oil well distances

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Embodiment Construction

[0060] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0061] At first the terms involved in the present invention are explained:

[0062] Well Drilling: A well that is being drilled. Drilled Wells: Oil wells that have completed the drilling process.

[0063] The specific application scenarios of the present invention are as follows. Oil wells such as cluster wells are widely used in offshore and land oilfields due to their many advanta...

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Abstract

The invention provides a determination method and device of oil well distances. The determination method includes the steps that the amplitude of an alternating magnetic field detected by a magnetic sensor is obtained after a current source supplies a casing of a first oil well to enable the first oil well to form the alternating magnetic field, the first well is a well which completes the drilling process, the magnetic sensor is fixed in a second well, the second well is a well which is subjected to the drilling process, and one end of the current source is electrically connected to the top end of the casing of the first well; the other end of the current source is connected with the ground at least 50 meters away, or the other end of the current source is electrically connected to the top end of a casing of a third well, and the third well is another well which completes the drilling process and at least 50 meters away from the first well; and according to the amplitude, the distancebetween the second oil well and the first oil well is determined. The effective detection distance is long, and no tools need to be lowered into the drilled wells, so that the normal production of the drilled wells cannot be affected.

Description

technical field [0001] The invention relates to the technical field of oil development and drilling, in particular to a method and a device for determining the distance of an oil well. Background technique [0002] For oil development drilling, especially for the drilling of cluster wells and infill wells, a drilling process is required to obtain oil wells. During the drilling process, the oil well currently undergoing the drilling process is very likely to be adjacent to other oil wells in position. Due to the complex structure of the wellbore, it is very easy for the wellbores of adjacent oil wells to collide with each other during the drilling process, which will affect the normal production process of the oil well and cause huge economic losses. In order to prevent accidents where the boreholes of adjacent oil wells collide with each other during the drilling process, the distance between the oil wells undergoing the drilling process and other oil wells that have comple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/30E21B47/00E21B47/13
CPCE21B43/30E21B47/00E21B47/13
Inventor 梁华庆张睿范家怿颜肖平窦新宇高德利
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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