华南地质2024，Vol.40Issue(1)：85-94,10.DOI:10.3969/j.issn.2097-0013.2024.01.006
渝东地区平桥构造寒武系洗象池群天然气成藏特征及意义
Gas Reservior Forming Characteristics and Significance of the Middle-Upper Cambrian Xixiangchi Group in Eastern Chongqing area
摘要
Abstract
A major gas exploration breakthrough was made in the Xixiangchi group through Well Pingqiao 1 which located in Pingqiao area,south of eastern Chongqing.Based on the study of carbon isotope of natural gas,it is considered that the hydrocarbons in Xixiangchi group reservoir come from Wufeng-Longmaxi for-mation source rocks.A preliminary study on the reservoir through core,logging of Well Pingqiao 1,com-bined with Xixiangchi Group section from nearby Sanquan of Nanchuan and etc reveals that the vug of Xixi-angchi group are developed,and the gas reservoir belongs to vuggy reservoir or fracture-vuggy reservoir.Based on study of the sequence of filling minerals such as dolomite,quartz,calcite and etc.and mineral inclu-sion characteristics of fractures of core from Well Pingqiao 1,the results show that the fracture formation and mineral filling mainly occurred in Yanshan-Himalayan period,the Yanshan tectonic deformation period is an important period for hydrocarbon charging in Xixiangchi group,and the Yanshan-Himalayan uplift period is also a period for further hydrocarbon charging.The successfully exploration of Xixiangchi Group in Pingqiao area,south of eastern Chongqing proves that partial shale gas release and the lateral hydrocarbon supply of early shale gas can form industrial gas reservoirs,which is of great significance to hydrocarbon exploration of the lower assemlage of the whole high-steep structural belt in Eastern Chongqing.关键词
寒武系/洗象池群/成藏特征/平桥构造/渝东地区Key words
Cambrian/Xixiangchi group/reservior forming/characteristics/Eastern Chongqing分类
地质学引用本文复制引用
陈绵琨,梁西文,刘漪,盛贤才..渝东地区平桥构造寒武系洗象池群天然气成藏特征及意义[J].华南地质,2024,40(1):85-94,10.基金项目
中国石油化工股份有限公司科研项目(P22077) （P22077）
