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Method and device for explosive fracturing of sidetracking well

A side drilling and fracturing technology, applied in the field of side drilling explosive fracturing and devices, can solve the problems of inability to meet the development situation of new oil and gas resources, difficult to recover oil and gas, low permeability, etc., and achieve the expansion of effective oil and gas production. Radius, increased yield, blast the effect of simple crafting

Inactive Publication Date: 2016-10-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

However, due to the low permeability of the reservoirs of unconventional oil and gas resources, it is still difficult to produce oil and gas far from the main fractures, and the increase of productivity of a single well is restricted
Therefore, the use of existing development technologies cannot meet the needs of the new oil and gas resource development situation

Method used

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  • Method and device for explosive fracturing of sidetracking well

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with accompanying drawing.

[0028] Fig. 1 shows in detail the structural diagram of the device for explosive fracturing of sidetracking wells. As shown in FIG. 1 , the device 100 includes a pipe string 1 , a packer 2 , a liquid explosive container 3 , a spacer fluid container 4 , a blocking fluid container 5 , a pressurizer 6 and a detonator 7 . Wherein, the pipe string 1 can be lowered into the wellbore, and the lower end of the pipe string 1 can extend into the reservoir. A packer 2 can be arranged between the pipe string 1 and the wellbore for isolating the reservoir. The liquid explosive container 3 , spacer liquid container 4 , and blocking liquid container 5 can all selectively communicate with the pipe string 1 for transporting corresponding liquids into the pipe string 1 . The pressurizer 6 can communicate with the liquid explosive container 3 , the spacer fluid container 4 and the barrier f...

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Abstract

The invention relates to a method and a device for explosive fracturing of a sidetracking well. The method for explosive fracturing of sidetracking wells includes: step 1: running a pipe string into the wellbore, so that the lower end of the pipe string extends into the reservoir; The spacer isolates the reservoir; step 3: pump liquid explosives through the pipe string, so that the liquid explosives enter the sidetracked well; step 4: pressurize the liquid explosives in the pipe string to the upper interface of the reservoir; step 5: pass the pipe string The column is lowered into the detonator and detonated at regular intervals. By adopting the method, the permeability of the reservoir can be improved, the effective oil and gas recovery radius and the effusion area of ​​the oil and gas well can be expanded, and the purpose of increasing the output of the oil and gas well can be achieved.

Description

technical field [0001] The invention belongs to the technical field of reservoir transformation of unconventional oil and gas reservoirs such as shale oil and gas, tight sandstone oil and gas, and particularly relates to a method and a device for explosive fracturing of sidetracking wells. Background technique [0002] After 100 years of exploration and development of conventional oil and gas resources, there are fewer and fewer large-scale simple high-quality resources. With the rapid development of the world economy and the increasing demand for energy, unconventional oil and gas resources have gradually become a new growth point for reserves. [0003] In the prior art, horizontal well staged fracturing technology is mostly used in the development of unconventional oil and gas resources such as tight sandstone and shale oil and gas. However, due to the low permeability of unconventional oil and gas reservoirs, it is still difficult to produce oil and gas far from the main...

Claims

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Application Information

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IPC IPC(8): E21B43/263
Inventor 孙志宇张汝生刘长印黄志文李凤霞林鑫贺甲元杨科峰
Owner CHINA PETROLEUM & CHEM CORP
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