澳大利亚南缘湖相及煤系烃源岩发育特征与勘探潜力

发布时间：2018-01-04 23:24

本文关键词：澳大利亚南缘湖相及煤系烃源岩发育特征与勘探潜力　出处：《大庆石油地质与开发》2017年06期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:Taking paleoecology research method as the core, taking tectonic-controlled deposition and its evolution as the theoretical basis, comprehensive use of drilling, seismic and other data. The development characteristics of lacustrine facies and source rocks of coal measures in the southern margin of Australia are discussed. It is considered that the central seismic facies of semi-graben in Daao Bay Basin and Ortway Basin in the western part of the rifting period present "low frequency continuous strong reflection". The characteristic region is the favorable position for the development of deep lacustrine source rocks. The source rocks of the lacustrine facies in the eastern Gyibug Sloan basin are of shallow lacustrine background and are good gas source rocks with the characteristics of oil and gas distribution in the west oil and oil east. The development scale and the difference of coal-forming mother material in the transitional coal measure strata are the main controlling factors leading to the distribution of oil and gas in the coal measures, forming the deep lacustrine facies oil in the Da'ao Bay Basin and the Ottwi Basin. The gas generation of delta coal measures and the shallow lacustrine facies of Gyibug Slan basin, and the "binary" structural characteristics of source rocks of coastal plain facies coal measures. The nearshore and land-based semi-graben, shallow continental shelf, central rift zone of Gyibug Slan basin and northern terrace are favorable exploration zones.
【作者单位】：中海油研究总院;
【基金】：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)
【分类号】：P618.13
【正文快照】： 澳洲南缘为被动大陆边缘盆地发育带[1-10],自西向东依次发育了大澳湾盆地、奥特维盆地、索雷尔盆地、巴斯盆地、吉普斯兰盆地等5个中、新生代盆地,总面积近120×104km2。目前,盆地绝大部分区域位于海上,最大水深超过5 000 m(图1)。从地理条件看,油气勘探活动主要集中在大澳湾

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