Characteristics and formation mechanism of Changxing Formation-Feixianguan Formation reef-shoal reservoirs in Yuanba Gasfield

作     者：Yongsheng Ma Xunyu Cai Peirong Zhao 

作者机构：China Petroleum&Chemical CorporationBeijing 100728China 

出 版 物：《Petroleum Research》 (石油研究（英文）)

年 卷 期：2016年第1卷第2期

页      面：123-134页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 07[理学] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0818[工学-地质资源与地质工程] 0816[工学-测绘科学与技术] 

基　　金：This study was supported by China Geological Survey(Zi02-029-006) 

主　　题：Yuanba Gasfield Puguang Gasfield Upper Permian Lower Triassic reef-shoal ultra-deep formation carbonate reservoir 

摘      要：Taking advantage of the successful experience in exploring and discovering the Puguang Gasfield,and targeting the Changxing Formation-Feixianguan Formation organic reef and shoal lithological trap,SINOPEC drilled Well Yuanba 1 in the Bazhong area in Northeast Sichuan in 2006,and discovered the Yuanba Gasfield with a high-production commercial gas flow of 503×10^(3) m^(3)/*** a normal-pressured lithological gas reservoir with high H_(2)S content,Yuanba Gasfield is characterized by weak tectonic deformation and deep burial,with an average depth of 6,600 m in the central part of the gas reservoir,and is the deepest marine gas field in the Sichuan *** Gasfield is dominated by large-scale reef-shoal reservoirs of Changxing *** formation of the reservoirs was primarily controlled by early meteoric freshwater dissolution and dolomitization,and less affected by deep-burial dissolution and tectonic movement.A comparative analysis was made on the characteristics of deep reef-shoal reservoirs in the Yuanba and Puguang gas fields so as to explore their formation *** is concluded that the reservoir size and early pore development was controlled by early depositional-diagenetic *** formation and dissolution were controlled by structure-fluid coupling,pore reworking and preservation is determined by fluid-rock interaction.