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Dominating factors on well productivity and development strategies optimization in Weiyuan shale gas play, Sichuan Basin, SW China

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Petroleum Exploration and Development 2020年第3期47卷 594-602页

作者： MA Xinhua LI Xizhe LIANG Feng WAN Yujin SHI Qiang WANG Yonghui ZHANG Xiaowei CHE Mingguang GUO Wei GUO Wei PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China

Weiyuan shale gas play is characterized by thin high-quality reservoir thickness,big horizontal stress difference,and big productivity differences between *** on integrated evaluation of shale gas reservoir geology and well logging interpretation of more than 20 appraisal wells,a correlation was built between the single well test production rate and the high-quality reservoir length drilled in the horizontal wells,high-quality reservoir thickness and the stimulation treatment parameters in over 100 horizontal wells,the dominating factors on horizontal well productivity were found out,and optimized development strategies were *** results show that the deployed reserves of high-quality reservoir are the dominating factors on horizontal well *** other words,the shale gas well productivity is controlled by the thickness of the high-quality reservoir,the high-quality reservoir drilling length and the effectiveness of *** on the above understanding,the development strategies in Weiyuan shale gas play are optimized as follows:(1)The target of horizontal wells is located in the middle and lower parts of Longyi 11(Wei202 area)and Longyi 11(Wei204 area).(2)Producing wells are drilled in priority in the surrounding areas of Weiyuan county with thick high-quality reservoir.(3)A medium to high intensity stimulation is *** the implementation of these strategies,both the production rate and the estimated ultimate recovery(EUR)of individual shale gas wells have increased substantially.

关键词： Weiyuan shale gas play dominating factors of well productivity deployed reserves of high-quality reservoir thickness of high-quality reservoir high-quality reservoir drilling length effectiveness of stimulation development strategies optimization

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