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有人认为建南长兴组为生物礁气藏,本文根据礁的显示特征,结合建南实际资料情况,论证建南并不存在生物礁。原因是:1.“礁相区”古生物并不丰富,尤其是造礁生物非常贫乏;2.“礁相区”的地层厚度和邻区的地层厚度几乎相等;3.“礁相区”地层的层理发育;4.“礁相区”的岩性也不纯,含陆源泥质,并有燧石团块和硅质岩;5.“礁相区”地层的颜色较深;6.地震勘探无礁显示。
Some people think that the Jiannan Changxing Formation is a reef gas reservoir. According to the reef display characteristics and the actual conditions of Jiannan, this paper argues that there are no reefs in Jiannan. The reasons are as follows: 1. The paleontology in “reef facies zone” is not rich, especially the reef-forming organisms are very poor; 2. The thickness of the reef facies area is nearly equal to that of the adjacent area; 3. The “reef facies” 4. The lithology of “reef facies” is also impure, with terrigenous argillaceous, with chert boulders and chert; 5. The color of “reef facies” strata is darker; 6. The earthquake Exploration without reef shows.