L凹陷古近系文昌组储层物性控制因素研究

发布时间：2019-01-08 12:02

【摘要】：运用储层地质学、沉积学理论和方法,利用岩心观察,薄片分析、扫描电镜、X衍射等多种测试手段,在研究古近系文昌组碎屑岩储层基本特征基础上,探讨了低孔、低渗储层条件下优质储层的发育条件。研究表明:沉积作用是储层形成的基本条件,其决定了后期成岩作用类型及成岩强度,成岩作用早期的压实和胶结作用是储层物性变差的主要因素;优质储层主要受控于有机酸溶蚀、早期方解石胶结和构造活动,构造抬升使孔隙得以保存,断层是疏导油气和有机酸的主要通道,寻找有断裂疏导油气和有机酸运移方向及优势相带是该区下一步的勘探方向和突破点。该研究成果对指导研究区下一步勘探有着重要的意义,同时对南海各断陷盆地的油气勘探提供必要的参考和地质依据。
[Abstract]:By means of reservoir geology, sedimentology theory and method, core observation, thin slice analysis, scanning electron microscope, X-ray diffraction and so on, on the basis of studying the basic characteristics of clastic rock reservoir of Wenchang formation in Paleogene, the paper discusses the low porosity. The development condition of high quality reservoir under the condition of low permeability reservoir. The results show that the sedimentary process is the basic condition of reservoir formation, which determines the diagenesis type and diagenetic strength, and the compaction and cementation in the early diagenesis are the main factors of the poor reservoir physical properties. High quality reservoirs are mainly controlled by organic acid dissolution, early calcite cementation and tectonic activity, structural uplift to preserve pores, and faults are the main channels for the dredge of oil, gas and organic acids. Finding the direction of hydrocarbon migration and organic acid migration with faults and dominant facies zone is the next exploration direction and breakthrough point in this area. The research results are of great significance to guide the further exploration in the study area and provide necessary reference and geological basis for oil and gas exploration in various fault basins in the South China Sea.
【作者单位】：油气资源与探测国家重点实验室;中国石油大学(北京);
【基金】：国家自然科学基金“地质历史时期储层物性参数恢复”(41272157)
【分类号】：P618.13

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