Device and method for determining inter-well distance and direction during drilling of oil and gas wells

A technology of oil and gas wells and distances, applied in the field of exploration and development of oil and gas fields

Active Publication Date: 2019-01-15
PETROCHINA CO LTD
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  • Application Information

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Problems solved by technology

[0004] In order to solve related technical problems, the embodiment of the present invention provides a device and method for determining the distance and direction between wells during the drilling of oil and gas wells

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  • Device and method for determining inter-well distance and direction during drilling of oil and gas wells
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  • Device and method for determining inter-well distance and direction during drilling of oil and gas wells

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] figure 1 It is a structural schematic diagram of a device for determining the distance and direction between wells during the drilling process of oil and gas wells provided by the embodiment of the present invention. see figure 1 , the device includes: a magnetic field exciter 1 and a supporting device, the supporting device includes a MWD instrument 2 and a data processing system 3, the magnetic field exciter 1 means that when the direct current is connected, it can load the casing string of the adjacent oil and gas production well with direct current , so that the bushing string generates an additional electromagnetic field, and when the direct current is cut off, the DC power is stopped on the bushing string, so that the add...

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Abstract

The invention discloses a device and method for determining the inter-well distance and the direction during drilling of oil and gas wells and belongs to the field of exploration and development of oil and gas fields. The device includes a magnetic field exciter and a matching device, wherein the matching device includes an MWD instrument and a data processing system, a positive pole of the magnetic field exciter is connected with a first oil and gas well through a wire, a negative pole of the magnetic field exciter and a casing string of a second oil and gas well are connected through a wire,the MWD instrument is located in a drill string of the first oil and gas well, and the MWD instrument is connected with the data processing system. The device is advantaged in that in the drilling process of the first oil and gas well, the casing string of the second oil and gas well is loaded with the direct current by the magnetic field exciter to generate an additional electromagnetic field, so the MWD instrument can measure electromagnetic field intensity generated by the casing string in advance, the inter-well distance between the first oil and gas well and the second oil and gas well and the direction are determined, and thereby engineering accidents caused by collision due to the close distance between the first oil and gas well and the second oil and gas well are avoided.

Description

technical field [0001] The invention relates to the field of exploration and development of oil and gas fields, in particular to a device and method for determining the distance and direction between wells during the drilling of oil and gas wells. Background technique [0002] In the field of oil and gas field exploration and development, the number of oil and gas wells drilled every year will exceed 10,000, and most of the oil and gas wells are directional wells with direction and displacement. High-density distribution of well pattern. However, during the drilling of the first oil and gas well, due to the height distribution of the underground well pattern, engineering accidents in which the drill bit (or centralizer) used for drilling the first oil and gas well collides with the casing of the second oil and gas well often occur , resulting in casing damage, directly leading to the scrapping of the second oil and gas well, wherein the first oil and gas well is an oil and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/092E21B47/024
CPCE21B47/024E21B47/092
Inventor 付友义周洪林张金成唐世忠杜强陈佳杰
Owner PETROCHINA CO LTD
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