南盘江坳陷二叠纪生物礁油气勘探前景

The Exploration Prospects for Petroleum and Gas in Permian Bioreefs in Nanpanjiang Depressions

本文总结近40个礁体的特征后,提出南盘江坳陷内礁分为台缘礁和台隆礁两种,礁体中普遍发现沥青,多数富集在礁顶50m范围内,礁体邻近有较好的生油岩,礁顶有巨厚的三叠纪平尔关相泥质岩和碎屑岩覆盖,地腹台隆型构造存在,具有较好的生物礁气勘探前景。

After summing up the features of about fourty reef bodies, this paper suggests that the reefs in Nanpanjiang depressions can be divided into platform marginal reefs and platform rising reefs and in reef bodies, bitumen is widely found, with most of it enriched in the range of fifty meters at reef tops. Near the reef bodies, there are better oil-producing rocks. The reef tops are overlapped by mudstone and clastic rocks of Triassic pingerguan facies and there are structures of platform rising type underground. Therefore, this has good exploration prospects for petroleum and gas in these bioreefs.