川南-黔北地区龙潭组页岩气成藏条件分析  

Shale Gas Accumulation Condition Analysis of Longtan Formation in Southern Sichuan-Northern Guizhou

作　　者：曹涛涛 邓模[2] 刘虎 刘光祥[2] Andrew Stefan Hursthouse Cao Taotao;Deng Mo;Liu Hu;Liu Guang xiang;Andrew Stefan Hursthouse(Hunan Provincial Key Laboratory of Shale Gas Resource Exploitation,Hunan University of Science and Technology,Xiangtan,Hunan 411201,China;Wuxi Research Institute of Petroleum Geology,Sinopec Petroleum Exploration ＆Production Research Institute,Wuxi,Jiangsn 214126,China;Sichuan Key Laboratory of Shale Gas Evaluation and Exploitation,Chengdu,Sichuan 600091,,China)

机构地区：[1]湖南科技大学页岩气资源利用与开发湖南省重点实验室,湖南湘潭411201 [2]中国石化石油勘探开发研究院无锡石油地质研究所,江苏无锡214126 [3]页岩气评价与开采四川省重点实验室,四川成都600091

出　　处：《特种油气藏》2018年第3期6-12,共7页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"彭水地区常压页岩气勘探开发示范工程"(2016ZX05061);国家自然科学基金"页岩解析气碳同位素分馏特征及其指示意义"(41503033);中国石化科技攻关项目"川东地区龙潭组页岩气成藏条件研究"(P15103)

摘　　要：以川南-黔北地区龙潭组泥页岩为研究对象,通过野外、钻井和实验测试,分析了龙潭组泥页岩的成藏条件及影响因素。结果表明:川南-黔北地区龙潭组泥页岩分布广、累计厚度较大、埋藏深度适中;TOC为0.22%~14.62%,Ro为1.47%~1.93%,有机质以镜质组为主,干酪根类型为Ⅲ型;矿物组成以黏土矿物为主,石英含量较低;页岩孔隙以黏土矿物层间孔为主,有机质中孔隙较少;页岩比表面积和孔体积分别为18.29~36.18 m`2/g和0.033~0.078 m L/g,且与TOC之间存在明显的负相关性,而与伊蒙混层含量之间存在明显的正相关性。龙潭组泥页岩具有较强的甲烷吸附能力,Langmuir甲烷吸附量为2.98~6.98 m L/g。结合龙潭组顶底板、储层物性、含气性等特征,认为该区页岩气具有勘探潜力,可与煤层气进行联合开采。该研究可为龙潭组页岩气后续勘探提供一定参考。Field outcrop observation,drilling and test data are used to analyze the hydrocarbon accumulation conditions and influencing factors of Longtan Formation in the southern Sichuan-northern Guizhou.Research indicates that the Longtan shale formation is characterized by wide distribution,relatively large cumulative thickness and moderate burial depth.The TOC is 0.22% - 14.62% and Ro is 1.47% - 1.93%.The organic matter is dominated by vitrinite group and the kerogen is dominated by type III.The mineral composition is dominated by clay minerals with relatively low quartz content.The shale pores mainly contain interlayer pore of clay minerals and less organic matter pore.The specific surface area and pore volume are 18.29 - 36.18 m-2/g and 0.033 - 0.078 m L/g respectively,which show a negative correlation with TOC and a positive correlation with the illite-smectite content.The methane Langmuir adsorption capacity is 2.98 - 6.98 m L/g,which shows a relatively high methane adsorption capacity.According the properties of adjacent rock,reservoir and gas content,the shale gas in this region shows a exploration potential and can be jointly produced with coalbed methane.This research could provide certain reference for the subsequent shale gas exploration in the Longtan Formation.

关 键 词：海陆过渡相页岩气 储层物性 氮气吸附法 扫描电镜 龙潭组 川南-黔北地区 

分 类 号：TE122.2[石油与天然气工程—油气勘探]