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Comprehensive research on relationship between productivity and pore structure characteristics of volcanic reservoir in Shengping developing area

JIN Cheng-zhi1,2,YANG Shuang-ling3,4,SHU Ping4, WANG Guo-jun3 (1.China University of Geosciences,Beijing 100083,China;2.Exploration Department of Daqing Oilfield Company Ltd.,Daqing 163453,China;3.Petroleum Enginetering School of Southwest Petroleum University,Chengdu 610500,China;4.Exploration and Development Research Institute of Daqing Oilfield Company Ltd.,Daqing 163712,China)  
Based on multiplicity of volcanic lithology,it is conformed that primary pore and secondary emposieu are main pore style in volcanic reservoirs by means of field observation,core macroscopic and microscopic comprehensive research.Conventional mercury penetration data is used to classify pore style through advanced ways including nuclear magnetic resonance and mercury penetration at constant rate.This paper evaluates availability of pore,throat characteristic and reservoir fluid.There are mainly II and III throat,minor I throat.High pore throat ratio,less amount of throat and poor pore matching reflect that throat characteristic greatly affecting gas well deliverability in volcanic reservoir and have significant meaning in development of volcanic gas field in the future.
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