澳大利亚布劳斯盆地深水区Jamieson组AVO 异常成因分析
网络出版日期: 2013-04-20
基金资助
国家重大科技专项“海洋深水区油气勘探关键技术”(编号:2008ZX05025)资助
Origin of AVO anomaly of Jamieson Formation in deepwater area of Outer Browse Basin, Australia
刘文超 . 澳大利亚布劳斯盆地深水区Jamieson组AVO 异常成因分析[J]. 岩性油气藏, 2013 , 25(2) : 70 -75 . DOI: 10.3969/j.issn.1673-8926.2013.02.012
Based on core thin sections analysis and regional sedimentary settings, this paper carried out a comprehensive analysis of the exploration of Jamieson Formation inW-1 well in Outer Browse Basin, Australia. The result shows that Jamieson Formation is a set of Aptian-Cenomanian bio-siliceous rock to be of rich radiolarians and diatoms, and micro-porosity developed inside the foraminifer. The bio-siliceous rock is at a phase of early diagenetic B between opal A to opal CT transition with substantive micro-pores survived and is of high-bounded porosity and low density. The false gas-bearing reservoir in CMR log and AVO anomaly are caused by such petrographic characteristics. In fact, the bio-siliceous rock of Jamieson Formation is poor reservoir. Similar cases with false-DHI are not uncommon, especially in the shallow targets in deep-water and should be take notice of exploration.
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