辽东凸起东营组砂岩成岩作用及其对储层的影响

发布时间：2018-11-15 08:33

【摘要】：为确定辽东凸起东营组砂岩储层特征,采用偏光显微镜、扫描电镜、岩石热解、X线衍射及包裹体测温等方法,分析研究区储层岩石学、成岩作用特征及控制因素。结果表明:东营组储层主要岩石类型为杂基体积分数较低的岩屑长石砂岩和长石岩屑砂岩,其成岩阶段为早成岩B期和中成岩A期;主要成岩作用类型包括机械压实作用、胶结作用和溶蚀作用,其中沉积、成岩初期压实作用和方解石胶结作用,以及中晚期自生高岭石等黏土矿物充填是破坏储层孔隙的主要成岩作用,成岩中后期的长石溶蚀作用是改善储层物性的主要成岩作用;沉积作用决定研究区储层原生孔隙数量,成岩作用控制储层原生孔隙的改造程度及次生孔隙的发育程度。研究结果为辽东凸起东营组油气勘探提供地质依据,为辽东湾其他构造区块同类储层研究提供参考。
[Abstract]:In order to determine the sandstone reservoir characteristics of Dongying formation in Liaodong uplift, the petrology, diagenesis and controlling factors were analyzed by means of polarizing microscope, scanning electron microscope, rock pyrolysis, X-ray diffraction and inclusion temperature measurement. The results show that the main rock types of Dongying formation reservoir are lithic feldspathic sandstone and feldspathic sandstone with low integral number of complex matrix, and the diagenetic stages are early diagenetic stage B and middle diagenetic stage A. The main diagenesis types include mechanical compaction, cementation and dissolution, including deposition, early diagenetic compaction and calcite cementation. And the filling of clay minerals such as authigenic kaolinite is the main diagenesis to destroy the reservoir pores, and the feldspar dissolution in the middle and late diagenesis is the main diagenesis to improve the reservoir physical properties. Sedimentary process determines the number of primary pores in reservoir in the study area, and diagenesis controls the degree of transformation of primary pores and the development of secondary pores in the reservoir. The results provide geological basis for oil and gas exploration in Dongying formation of Liaodong uplift and reference for the study of similar reservoirs in other structural blocks of Liaodong Bay.
【作者单位】：成都理工大学油气藏地质及开发工程国家重点实验室;成都理工大学能源学院;
【基金】：国家自然科学基金项目(41172119) 中海油天津分公司项目(CCL2013TJXSBS1880)
【分类号】：P618.13

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