鄂尔多斯东南缘海陆交互相页岩储层特征及含气性

发布时间：2018-06-04 02:17

本文选题：鄂尔多斯盆地东南缘 + 页岩储层　；参考：《科学技术与工程》2017年15期

【摘要】：鄂尔多斯盆地为北方典型的含油气盆地,发育的多套石炭-二叠系海陆交互相页岩层系为油气藏的形成提供了重要的源岩-储层。为定性评价地区上古生界页岩的储层特点,探讨高应力环境下页岩的吸附特征,研究测定了页岩岩心样品的TOC、Ro、矿物成分、孔隙类型及含气量等参数,并结合MATLAB三维成图方法探讨了储层物性的影响因素,分析了样品等温吸附特征,最后对吸附数据进行了参数拟合。结果发现,研究区页岩主要发育的孔隙类型为有机质孔和矿物质孔,粒间微裂隙也有一定发育,各类孔隙发挥的作用各不相同,共同组成了具有典型特征的孔-裂隙系统;样品页岩气含量以解吸气为主,且TOC对解吸气含量存在积极影响;D-R+K模型可以很好地表征甲烷气体在超临界条件下充填在微孔中的过程,样品的吸附特点具体表现为低压条件下的单层吸附和高压条件下的多层吸附和顺序充填。
[Abstract]:Ordos basin is a typical oil-bearing basin in the north of China. Several sets of Carboniferous-Permian marine and continental interbedded shale series provide important source rocks and reservoirs for the formation of oil and gas reservoirs. In order to qualitatively evaluate the reservoir characteristics of Upper Paleozoic shale and to study the adsorption characteristics of shale under high stress environment, the parameters such as TOC Ro, mineral composition, pore type and gas content of shale core samples were studied and measured. The influencing factors of reservoir physical properties are discussed with MATLAB three-dimensional mapping method, and the isothermal adsorption characteristics of the samples are analyzed. Finally, the adsorption data are fitted with the parameters. The results show that the main pore types of shale in the study area are organic and mineral pores, and the microcracks between grains are also developed to some extent, and the effects of various pores are different, forming a typical pore-fracture system. The sample shale gas content is mainly desorption, and TOC has a positive effect on the desorption content. The D-RK model can well characterize the process of methane gas filling in micropores under supercritical conditions. The adsorption characteristics of the samples are monolayer adsorption under low pressure and multilayer adsorption and sequential filling under high pressure.
【作者单位】：中国矿业大学资源与地球科学学院煤层气资源与成藏过程教育部重点实验室;
【基金】：江苏省自然科学基金(青年基金)(BK20150179) 中央高校基本科研业务费专项资金(2015XKZD07) 江苏高校优势学科建设工程项目(PAPD)资助
【分类号】：P618.13

【相似文献】