逆冲推覆构造的主要特征及勘探前景

Geological characteristics and hydrocarbon potential of thrust nappe structure

在中国中西部前陆盆地构造特征研究基础上,对逆冲推覆构造带的发展、演化、剖面结构、层序关系和生、储、盖层组合等方面进行了研究,总结了逆冲推覆构造的4种构造模式,即台阶式逆冲推覆构造、双重逆冲构造、冲断褶隆、反冲断层。同时,对逆冲推覆构造的扩展方式、演化过程和主要特征进行了论述。指出了逆冲推覆构造带在生、储、盖层匹配较好的情况下具有良好的油气显示,是我国下步油气勘探的有利地区。

Based on tectonic characteristics of foreland basin in mid-west China,this paper studies the development,evolution,profile structure,sequence relationship and source-reservoir-cap association of thrust nappe structure, summarizes four tectonic patterns,i.e.terraced thrust nappe structure,double-thrust structure,thrust culmination and recoil fault,and discusses the extension,evolution and distinguishing features of thrust nappe structure.It is pointed out that there can be good oil and gas shows when source,reservoir and caprock are well configurated in thrust nappe structure which is considered as favorable oil and gas exploration area in China.