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Open hole exploding fracturing experiment device and method

An experimental device and deflagration technology, applied in earthwork drilling, wellbore/well components, production fluid, etc., to achieve the effect of improving the success rate and oil well utilization rate

Pending Publication Date: 2020-08-11
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned techniques cannot be directly used in open-hole ground deflagration fracturing experiments.

Method used

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  • Open hole exploding fracturing experiment device and method
  • Open hole exploding fracturing experiment device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] In May 2019, an open-hole deflagration fracturing ground experiment was carried out at a military shooting range in Xi'an. The experimental parameters were: 4# cement target diameter 3m, height 1m; casing 139.7mm, steel grade N80, height 1m, window opening height 0.5m; the perforating gun is 89mm gun type, the length of the perforating gun is 0.5m, the number of perforations is 8 holes, the phase is 90°, and the perforating bullet is DP41RDX23-1; It is 669KJ / kg, the burning speed is 5.6mm / s (6MPa), and the dosage is 0.25kg.

[0067] After the experiment, the 3m cement target cracked, the number of cracks was 2, the crack length was 3m, the crack width was 6-13mm, and the height was 1m. The cement coating was complete inside and outside. The experiment was successful. The photos of the experiment results are attached Figure 2-5 shown.

Embodiment 2

[0069] In May 2019, an open-hole deflagration fracturing ground experiment was carried out in a military shooting range in Xi'an. The experimental parameters were: 1# cement target diameter 3m, height 1m; casing 139.7mm, steel grade N80, height 1m, window opening height 0.5m; the perforating gun is 89mm gun type, the length of the perforating gun is 0.5m, the number of perforations is 8 holes, the phase is 90°, and the perforating bullet is DP41RDX23-1; the gunpowder power of the sleeve type gunpowder is 669KJ / kg, The burning speed is 5.6mm / s (6MPa), and the dosage is 0.5kg.

[0070] After the experiment, the 3m cement target cracked, the number of cracks was 2, the crack length was 3m, the crack width was 10-20mm, and the height was 1m. The cement coating was complete inside and outside. The experiment was successful. The photos of the experiment results are attached Figure 6-9 shown.

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Abstract

The invention discloses an open hole exploding fracturing experiment device and method. The device comprises a test target and a test device. According to the device and method, on the basis of a patent of screen pipe exploding fracturing experiment device and method, key components, monitoring means and evaluation methods are further optimized; the well type coverage range of an exploding fracturing ground simulation experiment is expanded; the blank of an open hole exploding fracturing ground experiment in china at present is filled; the novel patent is a key for deeply researching the application of an exploding fracturing technology in an open hole well; and the method is complementary with a method provided by a patent of open hole well exploding fracturing downhole experiment method,the systematic research can be carried out, a ground experiment is carried out before a downhole experiment is carried out, and therefore the downhole experiment success rate and the oil well utilization rate are increased.

Description

technical field [0001] The invention belongs to the technical field of deflagration fracturing, and in particular relates to an open-hole deflagration fracturing experimental device and method. Background technique [0002] The deflagration fracturing technology has been researched and applied in my country since 1985 in the Yanchang Qili Village oil field on land. So far, it has been a low-cost and suitable technology for improving production of near-water reservoirs. Offshore oil fields have been used since 2012 Started to study, and currently used more than ten wells to revive many long-term shutdown wells, and achieved significant production increase effects, which is a key development measure technology for offshore oilfields. [0003] At present, the application of deflagration fracturing is mainly concentrated in cased perforated wells, and the annual implementation scale has reached more than a thousand wells. In the early stage of technology application, some applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/263E21B43/116E21B47/06
CPCE21B43/263E21B43/116E21B47/06
Inventor 黄波孙林易飞杨万有陈维余师西宏张杰冯煊李旭光熊培祺刘春祥杨军伟
Owner CHINA NAT OFFSHORE OIL CORP
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