针对澳大利亚布劳斯盆地深水区钻探的失利，通过目的层 Jamieson 组岩心薄片鉴定，结合区域沉积环境分析，对该区深水区钻探进行了综合分析。 结果表明：这套硅质岩和硅质泥岩的特殊岩性体中富含放射虫与硅藻，且虫体内微孔隙发育，由于处于成岩演化的早期 B 阶段，微孔隙得以保存，使岩石具有高束缚孔和低密度的特征，从而产生了测井上的“含气砂岩”特征和地震上的 AVO 异常。 类似的 AVO 异常并不少见，尤其是在深水浅层沉积中，而事实上这类异常是由岩性造成的，并不表示含气，因此，今后的深水区勘探应注意规避此类风险。

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.