湖相碳酸盐岩的沉积相与油气分布关系——以山东胜利油田下第三系碳酸盐岩为例

RELATIONSHIP BETWEEN SEDIMENTARY FACIES OF LACUSTRINE CARBONATE ROCKS AND OIL AND GAS DISTRIBUTION

周自立 杜韫华

Zhou Zili Du Yunhua

石油工业部胜利油田地质科学研究院

Research Institute of Geology, Shengli Oilfield

湖相碳酸盐岩在地壳上分布较少,过去找到的矿产不多,一直未引起重视,只有少数人对现代湖泊碳酸盐沉积物做过一些工作,而对古代湖相碳酸盐岩的研究更少。近年来陆续见有这方面的论著,主要介绍美国犹他州尤英塔盆地绿河组湖相碳酸盐岩的岩石学特征,但没有涉及与含油气的关系。华北济阳拗陷始-渐新世发育有两套薄层湖相碳酸盐岩,分布较稳定,不但是良好的地层和地震标准层,而且是高产储集层。本文重点探讨了湖相碳酸盐岩的岩性、岩相沉积特征及其储集性能和油气分布关系。

In this paper, carbonate rock of Shahejie Formation in Jiyang Depression of North China is used as an example, the characteristics of lithology, texture, palaeontology and sedimentation of the carbonate rocks were examined in detail. They were divided into three facies zones and five sub-facies zones. It is suggested that the carbonate rocks are of lakeshore, shallow water lacustrine and deep water lacustrine facies. The carbonate rocks intercalate in clastic rocks can be regarded as highly productive reservoirs, as well as geological and seismic marker beds. Among them, dolomites of bank subfacies has the best reservoir properties.

https://doi.org/10.11781/sysydz198602123