筠连地区上二叠统宣威组沉积相及聚煤控制因素

发布时间：2018-05-12 03:31

本文选题：煤层气 + 沉积相　；参考：《岩性油气藏》2017年01期

【摘要】：近年来,四川盆地南缘筠连地区上二叠统宣威组作为煤层气勘探开发潜力区带引起了业内广泛关注。为了研究宣威组煤层分布及演化规律,依据钻、测井及区域地质资料,运用沉积学、区域地质学的理论和方法,进行了单井沉积相划分和连井沉积相对比,绘制出沉积相平面分布图,并探讨了区内聚煤作用的主控因素。结果表明,宣威组广泛发育曲流河相、潮坪相和少量混积台地相沉积,煤层主要发育于潮上带沼泽微相带中。总体上,温暖潮湿的古气候为植物的生长发育创造了条件,构造古地理与沉积古环境控制了煤层的宏观分布与发育程度。
[Abstract]:In recent years, the Xuanwei formation of the Upper Permian in Junlian area, the southern margin of Sichuan Basin, has attracted wide attention as a potential zone for coalbed methane exploration and development. In order to study the distribution and evolution of coal seams in Xuanwei formation, according to drilling, logging and regional geological data, single well sedimentary facies division and continuous well sedimentary facies comparison are carried out using the theory and method of sedimentology and regional geology. The distribution map of sedimentary facies was plotted and the main controlling factors of coal accumulation in the area were discussed. The results show that the meandering river facies, tidal flat facies and a few mixed platform facies are widely developed in Xuanwei formation, and the coal seams are mainly developed in the swamp microfacies of the upper tidal belt. In general, the warm and humid paleoclimate creates conditions for the growth and development of plants. Tectonic paleogeography and sedimentary paleoenvironment control the macroscopic distribution and development degree of coal seams.
【作者单位】：油气藏地质及开发工程国家重点实验室·西南石油大学;西南石油大学地球科学与技术学院;中国石油青海油田分公司勘探开发研究院;页岩气评价与开采四川省重点实验室;中国石油浙江油田分公司;
【基金】：国家自然科学基金项目“川东鄂西地区晚二叠世生物礁系统演化环境生态动力学研究”(编号:41272135);国家自然科学基金青年基金项目“甲烷在页岩气储层微纳米孔隙系统中运移的动力学机理研究”(编号:41302123)联合资助
【分类号】：P618.11;P534.46

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