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| Research on fracturing extension by radial hydraulic jet in low permeability reservoirs |
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ZHANG Dingyong1, YUAN Shibao2, TIAN Xianglei1, ZHANG Wei1, ZUO Jiaqiang3
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(1.Xianhe Oil Production Plant of Shengli Oilfield, SINOPEC, Dongying 257068, China;2.College of Petroleum Engineering in Xi 'an Shiyou University, Xi 'an 710065, China;3.Research Institute of Production Engineering of Shengli Oilfield,SINOPEC, Dongying 257000, China)
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| Abstract: |
| Based on the extended finite element method and combining with the criterion of tensile resistance failure, a three-dimensional finite element model of radical hydraulic jet fracturing fracture was built to study the influences of drilling pore diameter, drilling pore azimuth and depth on formation fracturing pressure. The results show that, with the increase of drilling pore diameter, the initiation fracture pressure has a significant linearly decreasing tendency. The formation fracturing pressure increases with the increase of perforation azimuth. 40° is the allowed critical perforation azimuth to obtain the low formation fracturing pressure. A angle less than 40° between the optimizing bore and the maximum horizontal stress is better. The propagation law of fracturing fracture varies under different perforation angles. |
| Key words: low permeability radical hydraulic jet fracture fracture extension |
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