Affection mechanism research of initiation crack pressure of perforation parameters of horizontal well

Abstract

Horizontal wells show better affect and higher success rate in low water ratio cement, complex fracture zone, crevice and heavy oil blocks, it is the main measures to expand control area of a single well. Hydraulic fracturing technology is the most financial way to improve the penetration of the reservoir to increase the production. However, compare with the vertical wells, the fracture of Horizontal wells are more complex, and lead to the initiation crack pressure is much higher than vertical wells. In this paper, defined the crack judging basis, and established the finite element model which could compute the initial crack pressure, to research the affection mechanism of perforation azimuth angle, density, diameter and depth, to provide references of perforation project's design and optimize. The research of this paper has significances on further understanding the affection mechanism of perforation parameters.

Keywords

Horizontal well / Perforation parameter / Initiation crack pressure / Crack mechanism

Acknowledgments

This research is Supported by the Natural Science Fund for Outstanding Youth Science Fund (Grant No. 51222406), New Century Excellent Talents in University of China (NCET-12-1061), Scientific Research Innovation Team Project of Sichuan Colleges and Universities (12TD007), the key projects of academic and technical leaders cultivate Fund in Sichuan Province, China (2011-441-zxh), and Sichuan Science and Technology Innovation Talent Project (20132057).

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