摘要
研究的主要不整合面为T4(营城组顶面)和T3界面(登娄库顶面),T4代表营城组末期构造运动,T3为分隔断陷层和拗陷层的裂后不整合,它们揭示了2期的构造反转运动。通过声波时差法和镜质体反射率法对比分析得,T4界面剥蚀厚度可达900m,T3界面剥蚀厚度可达1100m,T4和T3界面剥蚀厚度在西北和东南部较厚,西南向较薄。T4和T3不整合面剥蚀范围广,剥蚀厚度大,不仅能作为油气运移的重要通道,而且剥蚀作用能形成良好储层。
The T4 and T3 were the key unconformities of Lishu Fault Depression.The unconformity T4 represented local inversion structures;T3 was the post-rift unconformity which was a separated depression and fault basin stratum.They represented two inversion structure tectonic movements.Through comprehensively applying two methods of restoring the eroded strata thickness,such as acoustic transit time and vitrinite reflectance,the result shows that erosion thickness of unconformity T4 is about 860~900m,the T3 is about 1100~1480m.Denudation thickness is bigger in the northwest and southeast,and it is less in the southwest.The unconformities T4 and T3 not only could be the important paths for the oil and gas migration,but also are able to be the good places for the hydrocarbon accumulation.
出处
《石油天然气学报》
CAS
CSCD
2012年第9期12-17,10,共6页
Journal of Oil and Gas Technology
关键词
梨树断陷
不整合面
声波时差
剥蚀厚度
油气
Lishu Fault Depression
unconformity
acoustic transit time
denudation thickness
oil and gas
