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A kind of fracturing process method of double branch well

A process method and branch well technology, which are applied in the fields of earthwork drilling, wellbore/well components, and production fluids, etc., can solve the problems of long operation cycle, high overall cost, large manpower and material resources, etc., so as to reduce the operation links and shorten the operation. cycle, the effect of improving safety

Active Publication Date: 2021-10-26
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of the existing two-branch mining process that requires repeated relocation of drilling rigs and fracturing equipment, spraying and spraying in the middle to seek production, which consumes a lot of manpower and material resources, long operation cycle, and high overall cost.

Method used

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  • A kind of fracturing process method of double branch well

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Embodiment Construction

[0008] Such as figure 1 As shown, a dual-branch well fracturing process, the method steps are as follows: After the main wellbore I is drilled, use the temporary plugging tool for the construction of the branch well and the main wellbore to insert the butt joint 2 back, seal the main wellbore I, and then plug the main wellbore I The upper wellbore sidetracked the second branch wellbore II by windowing, and after the second branch wellbore II was drilled, the completion string including the second branch wellbore back-insertion butt joint 3 and the branch temporary plugging and isolation tool 4 was lowered. The fracturing reinsertion inner pipe string 1 is first reinserted into the second branch wellbore reinsertion docking cylinder 3 . Then remove the surface drilling rig equipment, move it to the fracturing equipment and supporting wellheads, and perform fracturing reconstruction on the second branch wellbore II. After the fracturing of the second branch wellbore II, the sec...

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Abstract

The invention relates to the technical field of drilling for oil and gas development, in particular to a fracturing process for a double branch well. The steps of the method are as follows: after the drilling of the main wellbore I is completed, the main wellbore I is closed, a window is opened in the upper wellbore of the main wellbore I and the second branch wellbore II is sidetracked, and the second branch wellbore II is fractured after the drilling of the second branch wellbore II is completed. After the fracturing stimulation of the second branch wellbore II, the second branch wellbore II will not be reversed directly, but the second branch wellbore II will be blocked temporarily. The invention realizes the continuous fracturing reconstruction after both branch wellbores are drilled, reduces the process of equipment relocation and intermediate flowback, further reduces the cost of equipment relocation, shortens the operation cycle, greatly reduces the cost of branch well reconstruction, and reduces the intermediate cost. In the operation link, the risk of well control is small, and the safety of construction is improved.

Description

Technical field: [0001] The invention relates to the technical field of drilling for oil and gas development, in particular to a fracturing process for a double branch well. Background technique: [0002] With the development of oil and gas fields to three-low reservoir areas, more and more oil and gas wells need to increase single well productivity through stimulation fracturing technology. Branch wells have the characteristics of fewer wells and high production. Branch well fracturing is a technical method that combines drilling and completion technology with stimulation methods to improve single well productivity. Technicians have carried out many beneficial attempts. However, the existing branch well fracturing technology basically adopts the method of moving the drilling rig after drilling a branch, moving it to the fracturing equipment to modify blowout for production; The second branch, after the second branch is drilled, remove the drilling rig and move it to the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 邓旭白冬青高远文余雷喻晨王馨萍胡靖邓晓立李跃孔栋梁赵展严仁田吴宁庄纯才王西贵关键杨雅惠张增辉
Owner BC P INC CHINA NAT PETROLEUM CORP
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