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随着非常规油气勘探的兴起页岩孔隙研究备受重视,如何研究页岩孔隙已经成为非常规油气首要解决的问题之一,其对页岩油气勘探层位选取、资源潜力评价和油气渗流能力计算具有重要意义。对页岩微—纳米孔隙表征技术、页岩孔隙类别的划分以及页岩孔隙演化规律分别进行了综述并指出存在问题,同时结合最新研究进展对页岩孔隙研究进行展望。提出工业CT—微米CT—纳米CT/FIB系列辐射扫描方法和压汞(MICP)—氮气吸附(N2)—二氧化碳吸附(CO2)流体法是孔隙定量表征的最优方法,通过单井孔隙度测井资料与实验室测定结果建立校正图版指导储层孔隙发育段优选;页岩孔隙分类研究还应该考虑含油气性,利用原子力显微镜等工具加强孔隙含油性研究;孔隙演化规律研究应该采用模拟实验和真实剖面样品对比并结合矿物组成分析等寻找主控因素。
With the development of unconventional oil and gas exploration, the shale pore research has received much attention. How to study shale porosity has become one of the most important problems for unconventional oil and gas exploration. It is of great importance for the selection of shale hydrocarbon exploration potentials, resource potential evaluation and oil and gas seepage capabilities Calculation is of great significance. The micro-and nano-pore characterization techniques of shale, the division of shale pore types and the evolution of shale porosity are reviewed respectively, and the problems are pointed out. Meanwhile, the research on shale porosity is prospected with the latest research progress. It is proposed that industrial CT-micron CT-Nano CT / FIB series radiation scanning method and mercury intrusion (MICP) -nitrogen adsorption (N2) -carbon dioxide adsorption (CO2) fluid method are the best methods for quantitative characterization of pores. Well data and laboratory test results to establish the correction plate to guide the optimization of pore development section; the shale pore classification should also consider the oil and gas, the use of atomic force microscopy and other tools to enhance pore oil; pore evolution law should be simulated experiments and Real profile sample comparison and analysis of mineral composition and other factors to find the main control.