Open hole exploding fracturing experiment device and method
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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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However, the above-mentioned techniques cannot be directly used in open-hole ground deflagration fracturing experiments.
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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...
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