摘要
以烃源岩演化过程中各阶段的最大古地温和最大埋深为基础,结合实钻资料,首先确立了川西坳陷中段上三叠统须一、须二段含油气系统不同地区烃源岩的生烃阶段和排烃阶段,再利用计算的不同生排烃阶段的生、排烃量,砂岩、泥岩孔隙度变化和油气成藏之间的关系,最终认为不同地区油气成藏的主要时期都为晚三叠世中期,从而为确定川西坳陷中段上三叠统须一、须二段含油气系统圈闭的有利时期指明了方向。
Based on the maximums paleogeotemperature and burial depth at each stage in source rock evolution process and combined drilling data, the stages of hydrocarbon generation and expulsion of the different areas source rocks in T_3 x1-T_3 x2 petroleum-bearing system of the middle member in west Sichuan depression are established. Through calculating generation and expulsion yields of the different stages and studying the relation between the porosity variation of sandstone and mudstone and oil-gas reservoiring, it is recognized that the main reservoiring stages of the oil-gas reservoirs in the different areas are all at the middle period of Later Triassic, which is important to determine the beneficial trap of T_3 x 1-T_3 x 2 petroleum-bearing system. (Financed by the project of the Key Technologies Research and Development Program of the Tenth “Five-year Plan”, No. 2001BA605A-05-01)
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2005年第12期19-21,共3页
Natural Gas Industry
基金
"十五"国家重点科技攻关项目(编号:2001BA605A-05-01)部分成果。
关键词
四川盆地
川西坳陷
晚三叠世
生烃
排烃
主要成藏期
Sichuan Basin, West Sichuan depression, 1—2 member of Xujiahe Formation, Hydrocarbon generation, Hydrocarbon expulsion, Main mature period
作者简介
张世华，女，1971年生，工程师，硕士；毕业于成都理工大学石油系；从事油气地质研究工作。电话：（028）83503824。E-mail：zshual@163．com
