谭卓
TAN Zhuo

• 1:中海油研究总院

摘要(Abstract)：

以古生态学研究方法为核心,以构造控制沉积及其演化为理论基础,综合利用钻井、地震等资料,探讨了澳洲南缘湖相及煤系烃源岩发育特征。研究认为:裂陷期西部大澳湾盆地和奥特维盆地箕状半地堑中心地震相呈现"低频连续强反射"特征的区域是深湖相烃源岩发育的有利部位,东部吉普斯兰盆地湖相烃源岩整体为浅湖相背景,是较好的气源岩,具有"西油东气"油气分布特征;过渡期煤系地层的发育规模和成煤母质差异是导致煤系含油气分布的主控因素,形成大澳湾盆地、奥特维盆地深湖相生油、三角洲相煤系生气和吉普斯兰盆地浅湖相生气、海岸平原相煤系生油的烃源岩"二元"结构特征。大澳湾盆地、奥特维盆地的近岸及陆上呈条带或雁列式展布的箕状半地堑、浅水陆架区、吉普斯兰盆地中央裂谷带、北部阶地为有利勘探区带。
Taking the studying method of palaeoecology as the core,on the theoretical bases of tectonic controlled sedimentation and its evolution,comprehensively adopting the drilling,seismic and the other data,the development characteristics of the lacustrine-facies and coal-bearing source rocks in Australian South Margin were explored. This study indicates that the regions with the characteristics of "low-frequency continuous strong reflections"in the seismic phase in the center of the half-graben formed in the rift stage of Bight Basin and Otway Basin in the west are the favorable parts of the development of the lacustrine source rocks,the lacustrine-facies source rocks in Gippsland Basin in the east are generally deposited in the shallow lacustrine background,which are much better source rocks,the oil and gas distributions are characterized by the "the oil in the west and the gas in the east"; the developed scale of the coal-bearing strata and the coal-forming materials in the transition stage are the main controlling factorsto the hydrocarbon distributions,the dual structural characteristics of the source rocks are formed: the oil generated in the deep lacustrine facies of Bight Basin and Otway Basin; the gas generated in the delta-facies coal-bearing strata and the shallow lacustrine facies of Gippsland Basin; and the oil generated in the coastal plain-facies coal-bearing source rocks. The near-shore & onshore banded or en-echelon half-grabens and the shallow shelf region in Bight Basin and Otway Basin are the favorable exploration zones,so are the central rift belt and the northern terrace of Gippsland Basin.

关键词(KeyWords)： 澳大利亚南缘;湖相烃源岩;煤系烃源岩;浮游藻类;成煤母质
Australian South Margin;lacustrine facies source rock;coal-bearing source rock;planktonic algae;coal-forming parent material

Abstract:

Keywords:

基金项目(Foundation): 国家“十二五”重大科技专项“亚太地区油气资源评价及未来战略发展方向”(2011ZX05028-006)

作者(Author): 谭卓
TAN Zhuo

DOI: 10.19597/J.ISSN.1000-3754.201704031

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