摘要
寻找"甜点"为页岩油气研究的突破口,而储集和保存条件是研究过程中的核心问题。文中研究运用TOC、扫描电镜、物性分析及X衍射等储层地化实验手段,对澳大利亚Eromanga盆地Toolebuc组页岩岩石学特征进行了全面分析,得出页岩中灰质、砂质及TOC与孔隙度成正比,黏土体积分数与含油饱和度呈负相关。应用岩心、测井资料对Toolebuc组页岩岩相进行精细划分,分析有利于页岩油气储集和保存的岩相组合。结果表明,Toolebuc组页岩存在页岩油气富集的基本条件,层内富含高丰度有机质的灰质页岩相、砂质页岩相或泥质灰岩相,是页岩油气富集的"甜点"区。
Searching sweet-point is the breakthrough point in shale hydrocarbon study and the storage and preservation condition are the key-point problems.The experiments and analysis methods such as TOC,scanning electron microscope,property analysis and X-ray diffraction are applied in this study.According to the lithology features analysis of Toolebuc Formation shale in Eromanga Basin,it is considered that calcite,sand contents and TOC have positive correlation with porosity,clay contents have negative correlation with oil saturation.Based on cores and logging dates,the lithofaices of Toolebuc Formation shale are fine divided and the lithofacies association favorable to the storage and preservation of Toolebuc Formation shale are analyzed.The result shows that the shales have dominating hydrocarbon condition,lime-shale lithofacies,sandy shale lithofacies and argillaceous lithofaices containing high abundance organic matter,which are the sweet-point areas for shale hydrocarbon accumulation.
出处
《断块油气田》
CAS
2014年第4期416-419,共4页
Fault-Block Oil & Gas Field
基金
中海油能源发展重大专项"非常规油气勘探关键技术"(WBS:E-J313N020)
