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Perforating method and perforating device for small-well-spacing shale oil and gas horizontal well

A technology for shale oil and gas and horizontal wells, which is applied in the field of perforation and can solve problems such as impact

Active Publication Date: 2021-10-22
PETROCHINA CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the small spacing between horizontal wells, when perforating a horizontal well, it may affect other adjacent horizontal wells

Method used

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  • Perforating method and perforating device for small-well-spacing shale oil and gas horizontal well
  • Perforating method and perforating device for small-well-spacing shale oil and gas horizontal well
  • Perforating method and perforating device for small-well-spacing shale oil and gas horizontal well

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Embodiment Construction

[0039] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0040] The embodiment of the present disclosure provides a perforation method for shale oil and gas horizontal wells with small well spacing, such as figure 1 As shown, the perforating method includes:

[0041] Step 101: Determine the fracture extension direction of the horizontal well.

[0042] It should be noted that the fracture extension direction refers to the extension direction of fractures generated during fracturing of the horizontal well.

[0043] For example, fracturing may be common fracturing methods such as hydraulic fracturing and high-energy gas fracturing, and the present disclosure is not limited thereto.

[0044] In the above implementation manner, if there is an included angle between the extension direction o...

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Abstract

The invention provides a perforation method and a perforation device for a small-well-spacing shale oil and gas horizontal well, and belongs to the technical field of perforation. The perforation method comprises the steps that a fracture extension direction of the horizontal well is determined; if an included angle exists between the fracture extension direction of the horizontal well and a drilling trajectory of a adjacent well, the fracture length of the horizontal well is determined; according to the fracture length of the horizontal well and the drilling trajectory of the adjacent well, a distance between a fracture of the horizontal well and the adjacent well is calculated; if the distance is smaller than a distance threshold value and one side of the horizontal well is provided with the adjacent well, 3-4 clusters of holes are perforated in each fracturing section of the horizontal well, and the distance between the clusters is 10-20 m; if the distance is smaller than the distance threshold value and adjacent wells are arranged on the two sides of the horizontal well, 5-6 clusters of holes are perforated in each fracturing section of the horizontal well, and the distance between the clusters is 5-10 m. According to the method, the influence of perforation operation on other adjacent horizontal wells can be avoided.

Description

technical field [0001] The disclosure belongs to the technical field of perforation, and in particular relates to a perforation method and a perforation device for a shale oil and gas horizontal well with a small well spacing. Background technique [0002] Shale oil and shale gas are a special kind of oil and gas energy. The main method of exploitation is to drill horizontal wells and use perforation technology to fracture oil and gas layers to achieve the purpose of exploitation. [0003] With the gradual maturity of the horizontal well development method, the horizontal well with small well spacing has become the main production method. However, due to the small spacing between horizontal wells, when perforating a horizontal well, it may affect other adjacent horizontal wells. Contents of the invention [0004] The embodiments of the present disclosure provide a perforating method and a perforating device for a shale oil and gas horizontal well with a small well spacing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/11E21B49/00
CPCE21B43/11E21B49/00Y02E10/10
Inventor 刘学伟付大其田福春赵玉东张胜传陈紫薇贾云鹏隋向云构小婷李晓娟闫阳石瑾张润泽赵涛
Owner PETROCHINA CO LTD