超临界二氧化碳开发页岩气技术研究进展

摘要

概述了近些年ScCO2开发页岩气的研究现状, 分析了纳米孔隙中CO2驱替CH4的作用机理, 从有机质萃取、元素迁移及吸附膨胀过程, 探讨了CO2地质埋藏过程中伴随的正负效应, 重点说明了影响储层改造的宏-微观控制机理和增渗机制, 而后与水力压裂技术作对比分析其利弊, 最后总结了该技术未来的研究方向.%Summarized the current research status of the shale gas exploration with supercritical CO2, analyzed the displacement mechanism in nanoporous, reviewed positive and negative effects of CO2 squestration in various ways, including organic extraction, elements migration and swelling process, of which the focus is the explanation for reservoir reformation in macroscopic-microscopic scale and the mechanism of increasing permeation.Afterwards, made comparison for hydraulic fracturing and supercritical CO2 fracturing technology to analyze the pros and cons.Finally, concluded the future direction in this field.