川东下侏罗统自流井组页岩储层特征及勘探潜力评价

发布时间：2018-03-13 19:32

本文选题：无机孔　切入点：有机孔　出处：《石油与天然气地质》2017年03期 　论文类型：期刊论文

【摘要】：通过对侏罗系自流井组页岩层系的岩心和野外露头观察、薄片鉴定、氩离子抛光、扫描电镜、压汞和气体吸附等手段,研究了页岩层系的岩石类型及储层微观类型和特征。页岩层系的岩石类型以黑色页岩为主,黑色页岩储层以矿物质粒间残留孔为主,微裂缝和有机质孔发育较少,孔隙度分布在1.4%~4.9%,孔隙结构以直径小于100 nm的孔隙为主,占85%以上。与研究区海相页岩相比,陆相侏罗系页岩微观储层有机质气孔较少、孔隙度较小且孔喉直径也较小。在勘探上,考虑到侏罗系大面积和全层系油气显示以及页岩油气在个别地区的突破,建议在侏罗系页岩(烃源岩)厚度较大和成熟度较高的区域开展研究.这些地区具有较好的页岩油气形成物质基础和储集条件,在紧邻页岩的致密砂岩或灰岩也可能具有致密油气或常规圈闭油气成藏的良好条件。
[Abstract]:By means of core and field outcrop observation, sheet identification, argon ion polishing, scanning electron microscope, mercury injection and gas adsorption, etc. The rock types and reservoir microtypes and characteristics of the shale strata are studied. The rock types of the shale strata are mainly black shale, the black shale reservoirs are dominated by the residual pores between mineral particles, and the microfractures and organic pores are less developed. The pore structure is dominated by pores with a diameter of less than 100nm, accounting for more than 85%. Compared with marine shale in the study area, the microcosmic reservoir of continental Jurassic shale has less organic porosity than that of marine shale in the study area. The porosity is small and the pore throat diameter is small. In exploration, considering the large area and the whole formation oil and gas display of Jurassic system and the breakthrough of shale oil and gas in individual area, It is suggested that the study should be carried out in the areas where the Jurassic shale (source rock) is thicker and more mature. These areas have good material foundation and reservoir conditions for shale oil and gas formation. The tight sandstone or limestone adjacent to shale may also have good conditions for oil and gas accumulation in dense or conventional traps.
【作者单位】：页岩油气富集机理与有效开发国家重点实验室;中国石化石油勘探开发研究院;中国石化页岩油气勘探开发重点实验室;中国地质大学(北京)能源学院;重庆地质矿产研究院;
【基金】：国家自然科学基金项目(41202103)
【分类号】：P618.13

【相似文献】