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在我国西南地区发育的震旦系灯影组下段,可以见到具葡萄状构造的云岩。这种具葡萄状构造的云岩在地层分层对比上有一定意义;同时又是天然气的储集空间。地质人员对它的成因十分重视,进行了一系例的研究。本文想通过一些实际资料和图片进行成因探讨。 一、对葡萄状构造成因的几种认识 四川威远构造上的灯影组天然气含量丰富,产量很高。为此石油勘探者对灯影组的岩性进行了反复分析研究,指出天然气含量与葡萄状构造有关。但对葡萄状构造的成因有二种截然不同的认识。
In the lower part of the Sinian Dengying Formation, which developed in southwest China, we can see the dolomite-like dolomite. The grape-like dolostone has some significance in the stratigraphic stratification stratification; at the same time, it is the natural gas storage space. Geological staff attaches great importance to its causes, conducted a series of studies. This article wants to go through a number of actual data and images to explore the causes. First, the cause of grape-like structure of several understanding of Sichuan Weiyuan structural light group rich natural gas, high yield. Therefore, oil prospectors carried out repeated analysis of the lithology of the Dengying Formation and pointed out that the natural gas content is related to the grape-like structure. But there are two very different understandings of the origin of the grape-like structure.