CAJ | 학술논문

四川盆地南部地区广泛发育下古生界寒武系、志留系等多套海相页岩层，其中龙马溪组是该区页岩气勘探开发的重点目标层。根据钻井岩心资料，通过有机碳、热解、碳同位素、等温吸附等地球化学实验分析，对川南地区下志留统龙马溪组页岩的有机质特征及其对页岩含气量的影响进行了研究。结果表明，川南地区龙马溪组页岩有机碳含量较高（平均1.53%），有机质类型较好（Ⅰ型和Ⅱ1型），热演化程度高（Ro为1.94%～2.42%），且页岩含气量较高（平均1.85m3/t）。页岩有机质特征是影响页岩含气量的主要因素，有机质丰度、有机质类型和热演化程度三者共同决定了川南地区龙马溪组页岩的含气量。
사천분지남부지구엄범발육하고생계한무계、지류계등다투해상혈암층，기중룡마계조시해구혈암기감탐개발적중점목표층。근거찬정암심자료，통과유궤탄、열해、탄동위소、등온흡부등지구화학실험분석，대천남지구하지류통룡마계조혈암적유궤질특정급기대혈암함기량적영향진행료연구。결과표명，천남지구룡마계조혈암유궤탄함량교고（평균1.53%），유궤질류형교호（Ⅰ형화Ⅱ1형），열연화정도고（Ro위1.94%～2.42%），차혈암함기량교고（평균1.85m3/t）。혈암유궤질특정시영향혈암함기량적주요인소，유궤질봉도、유궤질류형화열연화정도삼자공동결정료천남지구룡마계조혈암적함기량。
Multiple sets of marine shale in Lower Paleozoic Cambrian, Silurian systems have been widely developed in the southern part of Sichuan Basin. In which, the Longmaxi Formation is the key target of shale gas exploration and exploitation in the area. Based on borehole core data, after geochemical experimental analyses of organic carbon, pyrolysis, carbon isotope, isothermal adsorption etc. car-ried out researches on lower Silurian Longmaxi shale organic matter characteristics and their impacts on shale gas content. The result has shown that the organic carbon content in Longmaxi shale is rather high (average 1.53%), organic matter types are excellent (types I and II1), high thermal evolution degree (Ro 1.94%~2.42%) and rather high shale gas content (average 1.85m3/t). The shale organic mat-ter characteristics are the main factors to impact shale gas content;the organic matter abundance, types and thermal evolution degree three codetermined the gas content in Longmaxi shale.