页岩吸附与解吸气量实验研究  

Experimental study on the adsorption and desorption of shale gas

作　　者：石文睿[1] 郭美瑜[2] 张建平[3] 冯爱国[3] 赵红燕[3] 叶应贵[3] 石元会[3] 

机构地区：[1]长江大学地球物理与石油资源学院 [2]香港中文大学 [3]中石化江汉石油工程有限公司测录井公司

出　　处：《录井工程》2015年第1期9-12,84,共4页Mud Logging Engineering

基　　金：中石化石油工程技术服务有限公司科技攻关项目"涪陵地区页岩气示范区石油工程集成技术"(编号SG1305);中国石化集团公司工程先导项目"页岩油气藏矿物录井定量分析技术"(编号SG12068)

摘　　要：页岩气主要以游离气和吸附气形式存在于富含有机质页岩中,含气量的大小受页岩储集层压力、温度等多种因素影响。页岩吸附气量是评价页岩气资源量的关键性参数,也是评价页岩气是否具有开采价值的一项重要标准。在分析页岩气吸附与解吸机理的基础上,开展F页岩气田龙马溪组-五峰组岩心等温吸附、解吸实验研究,实验结果表明:利用等温吸附线法是获得朗氏体积(VL)和朗氏压力(pL)的有效途径;钻井现场页岩快速解吸获得的总含气量主要为吸附气量,游离气量占比较小;页岩朗氏体积(VL)与样品的有机碳含量(Cto)成正相关,达到饱和吸附后温度升高,吸附能力明显下降。Shale gas is mainly present in the form of free gas and adsorbed gas in organic-riched shale,gas content is influenced by a variety of factors including shale reservoir pressure,temperature,etc.The adsorption amount of shale gas is a critical parameter to evaluate shale gas resources,as well as an important criterion that evaluates shale gas is worth the exploitation.Based on analyzing the adsorption and desorption mechanism of shale gas,the authors conducted the isothermal adsorption and desorption experimental study of cores from Longmaxi formation-Wufeng formation in F shale gas field,the experimental results showed that using isotherm adsorption line method is an effective way to obtain the saturated adsorption volume(VL)and Langmuir pressure(pL).The total gas content got from the rapid desorption of shale on drilling site is mainly the adsorbed gas,free gas is relatively small.(VL)of shale is positively correlated with Ctoof samples.After reaching the saturated adsorption,the temperature rises and the adsorption capacity decreased obviously.

关 键 词：页岩 吸附气 等温吸附法 解吸法 朗格缪尔方程 

分 类 号：TE132.1[石油与天然气工程—油气勘探]