论文部分内容阅读
目前,南堡凹陷已在沙河街组火山岩中发现了很好的油气显示,并获得了工业油气流,显示了沙河街组火山岩储层的勘探潜力。研究层段火山岩的岩性分布复杂,种类较多。岩相以爆发相、溢流相、喷溢相及火山沉积相为主,局部存在侵出相。以多期火山活动为特征,每一期次的火山活动中所形成的岩性、岩相及储层的储集空间类型及孔隙结构存在差异。杏仁体内孔和溶蚀粒间孔是研究区的主要储集空间,裂缝不仅是连通孔隙与裂缝、裂缝与裂缝及孔隙与孔隙的枢纽,也是主要的储集空间。而构造作用、风化淋滤及热液活动是控制火山岩储层发育的主要地质因素。
At present, the Nanpu Sag has found a good hydrocarbon display in the volcanic rocks of Shahejie Formation and obtained industrial oil-gas flow, indicating the exploration potential of the volcanic reservoirs in Shahejie Formation. The lithology of volcanic rocks in the research interval is complicated and has many types. The facies are mainly eruption phase, overflow phase, spillover facies and volcanic sedimentary facies, with local invaded facies. It is characterized by multi-period volcanic activity. There are differences in lithology, lithofacies and reservoir space types and pore structures formed in each period of volcanic activity. The pores in the amygdala and the intergranular pores are the main reservoir space in the study area. Cracks are not only the junctions connecting the pores and fractures, the fractures and fractures, but also the pores and pores, as well as the main storage space. The tectonism, weathering leaching and hydrothermal activity are the main geologic factors that control the development of volcanic reservoirs.