摘要
川西坳陷东坡中侏罗统沙溪庙组油气来源于下伏须家河组烃源层,烃源断层是天然气垂向运移的通道。本文采用燕山末期的断面古构造形态构造运移动力模型,应用断层泥比率(shale gouge ratio,SGR)参数对断裂输导性进行评价并建立输导格架模型,根据断-源空间匹配构造烃源岩排烃模型,预测断裂优势运移通道分布并探讨其对天然气运聚成藏的影响。结果表明,断面形态和断-源匹配关系是断裂优势运移通道形成的主控因素,断面形态决定天然气运移指向,烃源岩和断层的接触关系、厚度及生烃强度决定了优势运移通道的供烃量。
The gas and oil of the Shaximiao formation of Middle Jurassic in the eastern slope of the western Sichuan depression is derived from the hydrocarbon source layer of the lower Xujiahe formation. Hydrocarbon source fault is a channel for vertical migration of the gas. In this paper, the dynamic model of migration is constructed by using the paleotectonics morphology at the end of Yanshan.The shale gouge ratio (SGR) parameter is used to evaluate the fault migration performance and establish the conduit framework model. According to the distribution model of fault-source matching structure source rock, the fracture dominant migration channel is predicted and the influence on the migration and accumulation of gas is discussed. The results show that the sectional morphology and fault-source matching are the main controlling factors for the formation of fracture dominant migration channel. The sectional morphology determines the migration direction. The hydrocarbon supply in the dominant migration channel is determined by the contact relationship between source rock and fault, thickness and hydrocarbon generation intensity.
作者
吴文静
吴东胜
WU Wenjing;WU Dongsheng(College of Geosciences,Yangtze University,Wuhan 430100,China)
出处
《中国科技论文》
CAS
北大核心
2019年第5期476-480,523,共6页
China Sciencepaper
关键词
川西坳陷东坡
断裂
优势运移通道
主控因素
eastern slope in western Sichuan depression
fracture
dominant migratingchannel
main controlling factors
作者简介
第一作者:吴文静(1994-),女,硕士研究生,主要研究方向为油气输导体系和油气成藏;通信作者:吴东胜,教授,主要研究方向为油气地质理论与勘探方法,wds1994@163.com.
