覆盖区碳酸盐岩层序界面的识别——以川北下三叠统飞仙关组为例

Distinguishing of sequence interface of carbonate rock in the covered field:an example for Feixianguan Formation,Lower Triassic in Northern Sichuan Basin

覆盖区碳酸盐岩地层层序界面的识别很困难,可以综合应用地震、测井、岩心和野外露头等多方面的资料识别层序界面。界面识别时,应从识别野外露头的界面出发,综合应用地震资料,在沉积相研究的基础上,应用岩心、录井和测井等资料综合分析,划分层序界面,并用相邻井互相约束、彼此修正。层序界面的划分对油气勘探有重大意义,可预测川北地区下三叠统飞仙关组台缘鲕滩储集层的分布。

It is very difficult to distinguish sequence interface of carbonate rock in the covered field. By comprehensive application of seismic, well logging, rock core and field outcrop etc., distinguishing of sequence interface can be achieved. When distinguishing interface, field outcrop must be considered at first, comprehensively applying seismic data, base on research of sedimentary facies, by applying data of diagenesis, well logging etc, It is very important for exploration of oil and gas to make off the sequence interface, so the distribution of platform margin oolitic beach reservoirs of Feixianguan Formation, Lower Triassic can be predicted by the method in the northern Sichuan basin.