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川东龙马溪组含水页岩吸附特征 被引量:3

Adsorption Characteristics of Water-bearing Shale in Longmaxi Formation,Eastern Sichuang
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摘要 采用室内吸附实验测试和吸附理论模型拟合手段,研究了不同含水饱和度下川东龙马溪组页岩的吸附特征,结果表明:当温度一定时,随着页岩含水饱和度的增大,相同压力下的页岩吸附量明显减小,吸附等温线整体下移;相同含水饱和度下,页岩气吸附量随压力升高而增大;不同含水饱和度页岩的吸附等温线较符合Langmuir模型,含水饱和度与其对应吸附等温线的Langmuir模型拟合指数a和b之间存在较好的线性关系,以此建立的计算模型可以计算任意含水饱和度页岩的理论吸附等温线,与相同含水下饱和度的实测页岩气吸附等温线对比,该模型的计算精度较高。 The adsorption characteristics of Longmaxi Formation shale in eastern Sichuan under different water saturation were studied by means of laboratory adsorption test and theoretical model fitting.The results show that at a certain temperature,with the increase of shale water saturation,the gas adsorption capacity of shale under the same pressure decreases obviously,and the adsorption isotherm moves downward as a whole;the gas adsorption capacity of shale with the same water saturation increases with the increase of pressure;the gas adsorption isotherms of shale with different water saturation are in accordance with Langmuir mode.There are good linear relationships between water saturation and fitting indexes a and b of corresponding adsorption isotherm,the calculation model established based on which can be used to obtain the theoretical adsorption isotherms of shale with arbitrary water saturation.Compared with the measured gas adsorption isotherms of shale with the same water saturation,the theoretical adsorption isotherms obtained by the calculation model are more accurate.
作者 林怡菲 关富佳 胡海燕 LIN Yifei;GUAN Fujia;HU Haiyan(School of Petroleum Engineering,Yangtze University,Wuhan 430100,Hubei,China;Cooperative Innovation Center of Hubei Province for Unconventional Oil and Gas,Yangtze University,Wuhan 430100,Hubei,China)
出处 《西安石油大学学报(自然科学版)》 CAS 北大核心 2019年第4期21-25,共5页 Journal of Xi’an Shiyou University(Natural Science Edition)
基金 国家自然科学基金“川东龙马溪组页岩气成藏机理及其主控因素”(41472122)
关键词 含水页岩 吸附规律 计算模型 龙马溪组 四川东部 water-bearing shale adsorption law computational model Longmaxi Formation eastern Sichuan
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