摘要
通过对目前油气资源前景显示较好的通化盆地三棵榆树断陷详细调查和地震剖面精细解释,利用平衡剖面方法恢复了其构造演化史,探讨了研究区油气勘探方向。结果表明:三棵榆树断陷为北北东向东部边缘同沉积断裂控制的东断西超式半地堑,其中新生代主要经历了七个演化阶段,发生了六期充填作用,遭受了四次构造运动改造,构成了三套湖盆沉积与火山充填交互建造;该构造演化有利于生储盖组合及圈闭的发育,但多期构造运动不利于常规油气藏保存。指出通化盆地三棵榆树断陷进行油气勘探应以火山油气藏和岩性油气藏为重点。
Through detailed investigation and seismic interpretation of Sankeyushu fault depression in Tonghua Basin where better prospects for petroleum and natural gas resources exist,the target of petroleum and natural gas exploration in the study area is discussed by restoring the tectonic evolution history with the method of balance profile. The results show that the Sankeyushu fault depression is the half graben with faulting in east and overlapping in west controlled by NNE trending syn-depositional faults of Eastern margin. In Mesozoic-Cenozoic the depression experienced seven evolutionary stages,six phases of fillings,four times of tectonic movements,resulting in three sets of intersections of lacustrine sediments and volcanic infill. The multistage tectonic evolution is beneficial to the source-reservoir-cap assemblages and trap development,but not to the preservation of conventional petroleum and natural gas reservoirs. It is pointed out that the petroleum and natural gas exploration of Sankeyushu fault depression in Tonghua Basin should focus on the volcanic reservoirs and lithologic reservoirs.
出处
《世界地质》
CAS
2017年第4期1092-1099,共8页
World Geology
基金
中国地质调查局(DD20160165-2)
吉林油田项目(JS2015-W-13-JZ-23-47)联合资助
