页岩气成藏机理研究新进展

New Progress on the Research of Formation Mechanism of Shale Gas Reservoir

摘要: 页岩气作为常规天然气的接替能源，是一种非常重要的非常规能源，开发潜力巨大。在调研了国内外页岩气研究成果的基础上，总结了页岩气的成藏条件和成藏机理。页岩气的成藏条件有内因和外因。内因包括成因类型、气源条件(厚度、矿物组成、成熟度、总有机碳含量(TOC)、干酪根类型、热演化程度、湿度)、储集条件(裂缝、孔隙度和渗透率)、圈闭条件、保存条件(盖层条件、水文地质条件、构造条件)，外因有深度、温度与压力。页岩气的成藏机理至少将煤层气(典型吸附气成藏原理)、根缘气(活塞式气水排驱原理)和常规气(典型的置换式运聚机理)的运移、聚集和成藏过程联结在一起，在表现特征上具有典型的过渡意义。

Abstract: Alternative energy for shale gas as a conventional natural gas is a very important kind of non- conventional energy resources, and has great potential for development. Based on the research of the domestic and foreign research achievements on shale gas, this paper summarizes the shale gas accumulation conditions and mechanism. Shale gas accumulation conditions have internal and external causes. Internal factors include genetic types, air condition (thickness, mineral composi-tion, maturity, total organic carbon (TOC) content, kerogen type, the degree of thermal evolution, reservoir conditions (humidity), cracks, porosity and permeability), trap conditions, preservation conditions (caprock condition, hydrogeological conditions, structural conditions); external factors include depth, temperature and pressure. At least the formation of shale gas accumulation me-chanism links the migration, accumulation and accumulation process of coalbed methane (typical adsorption gas reservoir forming principle), source contacting gas (piston type gas water dis-placement principle) and conventional gas (displacement of typical migration mechanism) to-gether, with the typical sense of transition in performance characteristics.