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Open hole staged fracturing construction method of dual-branch horizontal well

A technology of staged fracturing and construction method, which is applied in wellbore/well components, earthwork drilling, and fluid production, etc., can solve the problems of low operation efficiency, high construction cost, complicated construction process, etc., so as to reduce the cost of well construction , Avoid pressure problems, and broaden the effect of application fields

Inactive Publication Date: 2019-10-25
BC P INC CHINA NAT PETROLEUM CORP +1
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AI Technical Summary

Problems solved by technology

It overcomes the problems of high construction cost and low operating efficiency caused by the complex fracturing construction process of the existing four-stage branch wells, repeated replacement of drilling rigs, fracturing equipment, and disassembly and assembly of wellhead equipment

Method used

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  • Open hole staged fracturing construction method of dual-branch horizontal well
  • Open hole staged fracturing construction method of dual-branch horizontal well
  • Open hole staged fracturing construction method of dual-branch horizontal well

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Embodiment Construction

[0018] Such as figure 1 As shown, a construction method for open hole staged fracturing of a double-branch horizontal well, the steps of the method are as follows: firstly, the main wellbore is drilled, and a liner hanger 1 is used to lower the main hole open hole staged fracturing completion tool 2, The window opening system of running in the branch well is connected with the liner hanger 1, and the window opening construction and branch hole drilling are completed; Fracture completion tool 5 completes the window penetration of the main wellbore and branch wellbore; the main wellbore is run into the fracturing tie-back string, and the 3-degree bend-back seal plug 9 at the lower end of the fracturing tie-back string is first connected with the open hole section of the main wellbore The main wellbore fracturing tie-back sealing nipple 7 of the fracturing completion tool 2 forms a tie-back seal, such as figure 2 As shown, fracturing the main wellbore;

[0019] After the fract...

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Abstract

The invention relates to the technical field of oil field well drilling and completion, in particular to an open hole staged fracturing construction method of a dual-branch horizontal well. The methodcomprises the following steps that completion and drilling of a main well hole are firstly carried out, a main well hole open hole staged fracturing completion tool is lowered through a drilling liner hanger, a lowering branch well windowing system is in tie-back connection with the drilling liner hanger, and windowing construction and branch well hole drilling are completed; and a branch well completion window hanger is utilized for lowering the branch well hole open hole staged fracturing completion tool into a branch well hole, and window communicating of the main well hole and the branchwell holes is achieved. On the basis of a four-stage branched well, branched well fracturing is carried out efficiently, a drilling machine does not need to be carried repeatedly, main and branched well hole fracturing construction is completed continuously, the drilling and completion construction efficiency is improved, the well building cost is reduced, the well control risk is reduced, and theapplication field of branched wells is further widened.

Description

Technical field: [0001] The invention relates to the technical field of oil field drilling and completion, in particular to a construction method for staged fracturing of open holes in double-branch horizontal wells. Background technique: [0002] At present, the four-level branch well technology in China has become mature, and its application in the development of conventional oil and gas fields has played a role in increasing the production of a single well, reducing costs and increasing efficiency. However, due to the lack of window pressure and hydraulic sealing performance of four-stage branch well technology, its comprehensive application with fracturing stimulation technology is limited, which greatly limits the application of branch well technology in the development of unconventional oil and gas resources. On the basis of four-stage well completion, foreign branch well technology has achieved window pressure isolation by using various special tools such as packers a...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B33/128E21B33/129
CPCE21B33/128E21B33/129E21B43/26
Inventor 李虎余雷白冬青尚宪飞邓旭陈振刚严仁田胡靖赵云孔栋梁吴宁赵展廖晨宇张鹏周阳王晓军王键白洋李林李进杨雅惠张增辉
Owner BC P INC CHINA NAT PETROLEUM CORP
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