石油实验地质Issue(3)：352-358,7.DOI:10.11781/sysydz201403352
泥质烃源岩中蒙脱石伊利石化对页岩气赋存的影响
Effect of smectite illitization on shale gas occurrence in argillaceous source rocks
摘要
Abstract
Smectite and illite are different with each other from the aspects of specific surface area and microporo-sity. Compared to illite, smectite is more conducive to the occurrence of shale gas. During mudstone diagenesis, compaction and smectite illitization as well as the consequent abnormal pressure could transform the characters of the two minerals, bringing significant influence on the adsorption of shale gas. However, the organic matter in the montmorillonite of the argillaceous source rocks retards the smectite illitization process, making another important impact on shale gas adsorption. Integrating smectite illitization, interlayer organic matter evolution and dehydration process of interlayer water, the study shows that the favorable rich region for shale gas is correlated with the period prior to the stage when interlayer organic matter and water have been discharged, namely from the convertion stage of chaotic mix-layer illite/smectite to the partially ordered mixed-layer illite/smectite ( smectite for 50%-35% in I/S) and the final phase of ordered mixed-layer illite/smectite( smectite for about 15% in I/S) .关键词
泥质烃源岩/蒙脱石伊利石化/层间有机质/页岩气赋存Key words
argillaceous source rock/smectite illitization/interlayer organic matter/shale gas occurrence分类
能源科技引用本文复制引用
李颖莉,蔡进功..泥质烃源岩中蒙脱石伊利石化对页岩气赋存的影响[J].石油实验地质,2014,(3):352-358,7.基金项目
国家自然科学基金项目（41072089，41372130）和国家油气重大专项（2011ZX05006-001）资助。 （）
