川东龙马溪组页岩解吸滞后现象实验研究Experimental Study on Desorption Hysteresis of Longmaxi Formation Shale in Eastern Sichuan
关富佳,张杰,王海涛,胡海燕
摘要(Abstract)：
为了明确页岩气在大压力下的解吸滞后现象以及解吸滞后的影响因素,利用取自川东龙马溪组页岩露头的样品,进行页岩物性测试和吸附-解吸附实验测试。实验结果表明,页岩与甲烷的气固吸附和解吸附等温线不重合,存在明显的吸附滞后现象,且解吸滞后程度与页岩物性参数有关,页岩物性越差,孔隙结构越复杂,解吸滞后环越大。同时应用3种吸附理论模型对实测吸附和解吸附量数据进行拟合,拟合结果表明,相对于Langmuir方程和Freundlich方程,Langmuir-Freundlich方程能够更好地描述页岩气的吸附和解吸附特征。
关键词(KeyWords)： 页岩;解吸滞后;川东龙马溪组
基金项目(Foundation): 国家自然科学基金“川东龙巴溪组页岩气成藏机理及其主控因素”(编号:41472122);; 非常规油气湖北省协同创新中心创新基金“基于复杂结构井的页岩气产能研究”(编号:BUOG-2014-3)
作者(Author): 关富佳,张杰,王海涛,胡海燕
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