Research on Influential Factors of Initiation Pressure in Fracture Formation for Perforated Boreholes

DING Yi; LIU Xiangjun; LUO Pingya

doi:10.21656/1000-0887.380209

Volume 39 Issue 7

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DING Yi, LIU Xiangjun, LUO Pingya. Research on Influential Factors of Initiation Pressure in Fracture Formation for Perforated Boreholes[J]. Applied Mathematics and Mechanics, 2018, 39(7): 811-820. doi: 10.21656/1000-0887.380209

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Research on Influential Factors of Initiation Pressure in Fracture Formation for Perforated Boreholes

doi: 10.21656/1000-0887.380209

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University), Chengdu 610500, P.R.China

Funds: The National Natural Science Foundation of China(Key Program)（41772151）;The National Science and Technology Major Project of China（2011ZX05020-007-06）

Received Date: 2017-07-25
Rev Recd Date: 2018-05-26
Publish Date: 2018-07-15

Abstract

Abstract

Hydraulic fracturing is the most common and effective stimulation treatment. To better the fracturing design and improve the stimulation treatment, the mechanism of fracture initiation and propagation was investigated. In fracture formation, lots of natural fractures exist, having strong anisotropy and causing extreme complication and uncertainty of fracture initiation and propagation. Therefore, the mechanism of fracture initiation was stressed with the tensile criterion to establish the initiation pressure model in view of the natural fracture number, the occurrence and the intersection between perforation and fracture. The results indicate that, the natural fracture tends to cause initiation along the fracture plane and decrease the initiation pressure. In particular, with an increasing number of fracture planes, this decline will be more significant. Besides, the distribution of initiation pressure is related to several engineering parameters. For a high perforation azimuth and a low wellbore deviation, the initiation pressure will be relatively larger. The findings can offer reference for hydraulic fracturing in application.
- fracture formation,
- hydraulic fracturing,
- perforated borehole,
- initiation pressure

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References(10)

References

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