东濮凹陷三叠系裂缝性砂岩储层微观孔隙结构特征-断块油气田.PDF

断 块 油 气 田 18 卷 2 期 FAULT-BLOCK OIL GAS FIELD 2011 年3 月 191 文章编号 1005-8907 渊20 11冤02- 19 1-04 东濮凹陷三叠系裂缝性砂岩储层微观孔隙结构特征 国殿斌 中原油田分公司勘探开发科学研究院袁河南 濮阳 457001冤 摘 要 通过扫描电镜尧岩石薄片尧铸体薄片尧荧光薄片尧常规压汞等技术方法袁对东濮凹陷北部三叠系裂缝性砂岩储层的 微观孔隙结构特征进行研究遥结果表明袁东濮凹陷三叠系砂岩储层裂缝尧微裂缝发育袁裂缝性砂岩储层孔隙由岩石基质孔隙 与缝洞孔隙两部分组成袁缝洞孔隙是油气储集的有效孔隙袁孔隙类型主要为原生粒间孔隙尧粒内孔隙袁碎屑颗粒之间以点- 线式接触为主遥砂岩基质结构致密袁孔隙性差遥储层基质喉道以微喉为主袁压汞实验的排驱压力较高袁储层基质渗透率较低袁 储层基质的储尧渗性能差遥 关键词 三叠系曰裂缝性砂岩储层曰微观孔隙结构特征曰荧光薄片曰微裂缝曰东濮凹陷 + 中图分类号 TE 122.2 3 文献标志码 A Characteristics of micropore structure of Triassic sandstone reservoir in Dongpu Depression Guo Dianbin (Research Institute of Exploration and Development, Zhongyuan Oilfield Company, SINOPEC, Puyang 457001, China) Abstract: By the methods of scanning electron microscopy, rock thin section, cast thin section, microscopic fluorescence and conventional murcury injection and so on, the characteristics of microscopic pore structure of Triassic sandstone reservoir in Dongpu Depression were studied. The research shows that the fracture and microfracture were developed well in Triassic sandstone reservoir of Dongpu Depression, the pore system is composed of the rock matrix pores and the fracture-cave pores, which are the effective pore of hydrocarbon storage. The pore type is mainly the primary intergranular pores and intragranular dissolution pores. The contacted relation is mainly the dop-line type among clastic particles, and the porosity is low. The matrix pore of reservoir is mainly the microthoat. The discharge pressure is high in mercury injection experiment. The permeability of