川中地区古隆起寒武系洗象池组气藏成藏控制因素  

Geological characteristics and controlling factors of gas accumulation of Xixiangchi Formation in central Sichuan Basin,China

作　　者：林怡 钟波 陈聪 曾乙洋 陈友莲 鲍作帆 LIN Yi;ZHONG Bo;CHEN Cong;ZENG Yiyang;CHEN Youlian;BAO Zuofan(Research Institute of Exploration and Development,PetroChina Southwest Oil&Gasfield Company,Chengdu 610041,China;Exploration Company Division,PetroChina Southwest Oil&Gasfield Company,Chengdu 610041,China;Oil&Gas Cooperation and Development Company,BHDC,Tianjin 300280,China)

机构地区：[1]中国石油西南油气田公司勘探开发研究院,成都610041 [2]中国石油西南油气田公司勘探事业部,成都610041 [3]渤海钻探油气合作开发分公司,天津300280

出　　处：《成都理工大学学报（自然科学版）》2020年第2期150-158,共9页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：四川省科技计划项目(2017JY0048)。

摘　　要：探讨川中地区上寒武统洗象池组气藏成藏地质条件,指导勘探选区。对洗象池组的生储盖条件、气藏类型及特征、成藏主控因素等方面开展了系统的研究,认为川中地区主力烃源岩为下寒武统筇竹寺组泥页岩,洗象池组的颗粒白云岩为有利的储集层段,奥陶系湄潭组的泥岩、页岩及致密碳酸盐岩可以作为直接盖层,二叠系、三叠系的泥岩、页岩和致密碳酸盐岩及石膏为间接盖层。筇竹寺组烃源岩在二叠纪-三叠纪进入生烃高峰阶段,活动的烃源断裂为油气运移提供了重要通道。川中地区洗象池组气藏成藏主控因素包括烃源断裂、继承性古隆起、继承性古圈闭三方面,下一步的勘探目标为位于古隆起轴部斜坡带的构造-岩性圈闭发育区。The geological conditions of gas reservoir formation of the Upper Cambrian Xixiangchi Formation in the central Sichuan Basin are discussed in order to provide information for the selection of gas exploration area.Systematic study of formation-accumulation-cap conditions,reservoir type and characteristics of major controlling factors of reservoir indicates that the Lower Cambrian Qiongzhusi Formation shale and Xixiangchi Formation crystalline dolomite are the favorable reservoir layers;the Ordovician Mitan Formation mudstone,shale and tight carbonate rocks act as direct caprocks;Permian and Triassic mudstone,shale,tight carbonate rocks and gypsum act as indirect caprocks.Lower Cambrian source rocks initiated its peak stage of hydrocarbon generation in Permian-Triassic period.Active source rock faults provided important path for the migration of oil and gas.It is considered that hydrocarbon source faults,inherited paleouplift and inherited paleotrap are the main controlling factors for the gas reservoir formation.Therefore,the favorable exploration target of the study area is the structural-lithological traps in slope zone of paleouplift axis.

关 键 词：四川盆地 洗象池组 油气地质条件 成藏主控因素 

分 类 号：TE122.31[石油与天然气工程—油气勘探]