中国海相古生界和元古界含油气远景

SOUTH CHINA’S PETROLEUM EXPLORATION(16):PROSPECTS OF THE PALEOZOIC-PROTEROZOIC MARINE SEQUENCES OF CHINA/

我国的沉积盆地以复合盆地占主导,具两大沉积系统,即上部的中-新生界陆相沉积和下部的古生界、元古界海相沉积。可划分为三大块:东部区(中朝地台),南方区(扬子区);西部区(塔里木地台)。复合盆地中的沉积厚度可达万米,下部有巨厚的古生界和元古界沉积。据世界范围内的勘探经验和我国实际情况,积极开拓古生界和元古界海相地层的油气勘探势在必行,预测将会发现众多的油气田。

The author discussed here the distribution features and the main exploration results of both the sequences worldwide and domestically. The Chinese sedimentary basins are mainly composite ones which contain two systems of sedimentary sequences, the upper Mesozoic-Cenozoic cotinental one and the lower Paleozoic -Proterozoic marine one. The distribution of the composite basins could be divided into three main regions. The accumulative total thickness of both the systems could be as great as 10,000m, in the lower part of which lies the very thick Paleozoic - Proterozoic. Based on the external exploration ex- perience and the internal practical situation, it is under the circumstances that we should actively open up the exploration field of the marine sequences of Paleozoic and Proterozoic.