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A method for enhancing the fracturing effect of hydraulic shock fracturing

A technology of hydraulic shock and fracturing, which is applied in earth-moving drilling, wellbore/well components, and production fluids, etc., can solve the problem that the crushing agent is not easy to construct, and achieve the effect of improving the fracturing effect and strengthening the fracturing effect.

Active Publication Date: 2021-05-14
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for strengthening the fracturing effect of hydraulic shock fracturing. The instantaneous high pressure generated quickly presses the breaking agent into the perforation hole, which solves the problem that the breaking agent is not easy to work in the oil-water well, and the fracture network combination is formed by the transverse fractures formed by hydraulic impact fracturing and the longitudinal fractures formed by the silent breaking agent. To further strengthen the fracturing effect of hydraulic shock fracturing, this method is simple, feasible, safe and environmentally friendly

Method used

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  • A method for enhancing the fracturing effect of hydraulic shock fracturing

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Embodiment 1

[0032] A method for enhancing the fracturing effect of hydraulic shock fracturing, comprising the following steps:

[0033] (1) Pull out the production string of oil and water wells, and carry out well drilling, scraping, and well washing operations;

[0034] (2) Carrying out oil and water well formation leakage measurement and test injection operation;

[0035] (3) Assemble hydraulic impact fracturing tools, which should at least include components such as diversion tube, impact sheet, impact chamber, plunger seat, tail pipe, receiver, etc.;

[0036] (4) Add 20% to 100% of the space volume of the HSCA type (fast type) silent breaker in the tail pipe, and seal all the holes of the tail pipe with low-pressure impact sheets;

[0037] (5) Lower the hydraulic impact tool into the oil-water well by connecting a certain number of oil pipes and buckles with the hydraulic impact tool;

[0038] (6) The tubing is hydraulically pumped through the ground pump to perform hydraulic impact...

Embodiment 2

[0048] A method for enhancing the fracturing effect of hydraulic shock fracturing, comprising the following steps:

[0049] (1) Pull out the production string of oil and water wells, and carry out well drilling, scraping, and well washing operations;

[0050] (2) Carrying out oil and water well formation leakage measurement and test injection operation;

[0051] (3) Assemble hydraulic impact fracturing tools, which should at least include components such as diversion tube, impact sheet, impact chamber, plunger seat, tail pipe, receiver, etc.;

[0052] (4) Add 20% to 100% of the space volume of the HSCA type (ordinary type) silent breaker in the tail pipe, and seal all the holes of the tail pipe with low-pressure impact sheets;

[0053] (5) Lower the hydraulic impact tool into the oil-water well by connecting a certain number of oil pipes and buckles with the hydraulic impact tool;

[0054] (6) The tubing is hydraulically pumped through the ground pump to perform hydraulic impa...

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Abstract

The invention discloses a method for strengthening the fracturing effect of hydraulic impact fracturing. The method applies the current silent breaking agent in the construction industry to the field of oil exploitation, and rapidly presses the breaking agent into the injection through the instantaneous high pressure generated by hydraulic impact fracturing. The perforation solves the problem that the breaking agent is not easy to work in oil and water wells, and the combination of transverse fractures formed by hydraulic impact fracturing and longitudinal cracks formed by silent breaking agents can further strengthen the fracturing effect of hydraulic impact fracturing , the method is simple, feasible, safe and environmentally friendly.

Description

technical field [0001] The invention belongs to the fields of oil and gas field reservoir transformation technology and well completion, and in particular relates to a method for enhancing the fracturing effect of hydraulic shock fracturing. Background technique [0002] Hydraulic shock fracturing technology is a green, low-cost hydraulic fracturing technology that does not occupy operating space. It has been studied and applied in China since the 1980s and 1990s. It has been implemented in thousands of wells in other oil fields, and the effect is remarkable. This technology can be operated with conventional acidizing pumps or cementing pumps. It does not require fracturing pumps and a large amount of fracturing fluid, does not occupy platform space, and the percussion tools can be reused with low cost. Compared with hydraulic fracturing and deflagration fracturing, the operating cost can be greatly reduced, and at the same time, it does not involve pyrotechnics safety and q...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 孙林杨万有李旭光黄波康蕾王磊杨军伟熊培祺黄利平夏光孟向丽杨淼徐方雪
Owner CHINA NAT OFFSHORE OIL CORP
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