CHARACTERISTICS OF THE EVOLUTION OF PERMIAN OIL AND GAS OF SOUTHERN HUBEI
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摘要: 湖北南部二迭系是主要勘探目的层之一,分布较广泛。经过历年来的勘探,已在湖北、四川交界的建南地区找到工业性气田、龙驹坝含气构造,并发现油气苗、沥青共150余处,证实该区有过油气生成的历程。油气苗、沥青的分布具有一定的规律性,如桑植、石门一带主要为油苗;兴山、天门、芦市一带为油气苗;建南主要为干气;当阳地区为碳沥青及二氧化碳。不同地区油气苗性质不一,初步分析,认为是受热演化程度高低所致。Abstract: The Permian of Southern Hubei as a possible source rock is discussed in the light of sedimental environments and geochemical criteria. Based on the various criteria of hydrocarbon evolution such as burial depth, geothermal gradient, change of abundance of OM with depths, characteristic feature of DTA curve of kerogen, colour of conodonts, carbon isotope ratios of natural gases, etc. The evolution of OM in the Permian is discussed and divided into three substages, Late stage, last stage and last-destroyed stage. Hence an assessment of the oil and gas prospects of the Permian in Southern Hubei is made.
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[1] S.N.纳赛尔,根据生油岩的热成熟作用研究烃类的生成,石油勘探与开发(增刊),石油工业部石油勘探开发科学研究院,1978年. [2] 张子枢,光学法鉴别有机质成熟度,地质地球化学,科学技术文献出版社重庆分社,1980年. [3] 瓦索也维奇等,有机质变质作用与石油的生成,石油地质科技情报,总第27期,1976年.
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