涪陵焦石坝地区页岩气水平井压裂改造实践与认识

doi:10.11743/ogg20140318

Abstract

Abstract:

The application of advanced fracturing technology greatly increased shale gas production of pilot well group in Jiaoshiba of Fuling area,and improved commercial development of shale gas in China.Based on the analysis of shale reservoir architecture and geological characteristics,the brittleness and fracturability of reservoir rock were evaluated through rock mechanics parameter testing and mineral composition analysis.Shale in Wufeng-Longmaxi Formations is characterized by good organic matter type,high gas content and high brittleness index.According to the idea of "complex fracture network+main supporting fracture",and aiming at enlarging the volume of fractured shale reservoir,we selected most suitable materials for fracturing fluids,optimized fracturing design and related technologies,and determined the technolo-gical methods for fracturing of the pilot well group.Finally,a set of optimal staged fracturing technologies were developed and applied to the horizontal wells in Jiaoshiba of Fuling area.A total of 26 wells were fractured and obtained high open flow of gas in the range of 10.1×10⁴~155.8×10⁴ m³/d,verifying the effectiveness of these fracturing technologies.

Key words: Horizontal well, multi-stage fracturing, shale gas, Longmaxi Formation, Silurian, Jiaoshiba area

CLC Number:

TE348

Wang Zhigang. Practice and cognition of shale gas horizontal well fracturing stimulation in Jiaoshiba of Fuling area[J]. Oil & Gas Geology, 2014, 35(3): 425-430.

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Practice and cognition of shale gas horizontal well fracturing stimulation in Jiaoshiba of Fuling area

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