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Intrastratal explosive fracturing ignition ball and fracturing construction method

A construction method and ignition ball technology, which are used in earth-moving drilling, production of fluids, wellbore/well components, etc., to shorten the dwell time, reduce damage, and reduce injuries.

Active Publication Date: 2017-02-08
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an ignition ball and a fracturing construction method for explosive fracturing in a layer. By throwing an ignition ball, it can realize that all liquid explosives enter the formation and then explode and ignite, which solves the problem caused by the residual explosives in the wellbore during the explosion. The damage to the wellbore, the construction is simpler, safer and more efficient

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  • Intrastratal explosive fracturing ignition ball and fracturing construction method

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Embodiment Construction

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0022] Such as figure 1 Shown is the schematic diagram of the construction method of explosive fracturing in the middle layer of the present invention, and specific implementation includes the following contents:

[0023] A number of perforation holes 2 are formed in the reservoir casing 1 by means of perforation completion to prepare for fracturing;

[0024] The implementation of hydraulic fracturing can cooperate with the end sand screen technology to form a hydraulic fracture 11 with a certain fracture length and fracture width inside the reservoir 10;

[0025] After the hydraulic fracturing is completed, pump 8 slugs of spacer fluid, 6 slugs of large liquid explosives into the wellbore in sequence, put in ignition balls 3 wi...

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Abstract

The invention discloses an intrastratal explosive fracturing ignition ball and a fracturing construction method; the method is applied after hydrofracture is finished; the ignition ball is added between a liquid gunpowder slug and a liquid explosive slug; all liquid explosive enters the inner side of a hydraulic fracture through a perforation tunnel; the diameter of the ignition ball is slightly bigger than that of the perforation tunnel, so the ignition ball is clamped in the perforation tunnel; pressure is built in a shaft; under internal and external differential pressure mechanical force effect, solid gunpowder in the ignition ball starts to ignite, thus further igniting the liquid gunpowder; liquid explosives in the fracture can be continuously detonated under the liquid gunpowder combustion heat effect, thus completing the intrastratal explosive fracturing process. The method needs no other detonation tool in the well, and liquid explosives can be timely ignited and detonated after fully entering the hydraulic fracture, thus preventing shaft internal explosive residual in a detonation process, and maximumly reducing shaft damages in the blast process.

Description

technical field [0001] The invention relates to an ignition ball and a fracturing construction method for intralayer explosive fracturing, in particular to a process capable of pumping all liquid explosives into hydraulic cracks and then detonating, which is a combination of hydraulic fracturing and explosive fracturing. joint process. Background technique [0002] Intralayer explosive fracturing is one of the important reservoir stimulation methods in the development of unconventional oil and gas reservoirs. Intralayer explosive fracturing is a joint process of hydraulic fracturing and explosive fracturing. The specific process is to first perform hydraulic fracturing on the reservoir, and use the end sand removal to form a hydraulic fracture with a certain length. Then squeeze the configured liquid explosives into the hydraulic fractures, and then detonate the explosives. The shock waves and explosive gases generated by the explosion are used to further break the reservoi...

Claims

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Application Information

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IPC IPC(8): E21B43/263
Inventor 周再乐张广清
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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