川东龙马溪组页岩解吸滞后现象实验研究

发布时间：2018-03-08 04:22

本文选题：页岩　切入点：解吸滞后　出处：《西安石油大学学报(自然科学版)》2017年01期 　论文类型：期刊论文

【摘要】：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。
[Abstract]:In order to understand the phenomenon of desorption hysteresis of shale gas under high pressure and the influencing factors of desorption hysteresis, shale physical properties and adsorption-desorption tests were carried out by using samples from shale outcrop of Longmaxi formation in East Sichuan. The gas-solid adsorption and adsorption isotherm of shale and methane do not coincide, and there is obvious adsorption lag phenomenon. The degree of desorption hysteresis is related to the shale physical parameters. The worse the shale physical property, the more complex the pore structure is. At the same time, three adsorption theoretical models were used to fit the measured data of adsorption and desorption. The fitting results showed that compared with Langmuir equation and Freundlich equation, the adsorption and desorption characteristics of shale gas could be better described by using the Langmuir-Freundlich equation.
【作者单位】：长江大学石油工程学院;长江大学非常规油气湖北省协同创新中心;
【基金】：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)
【分类号】：P618.13

【相似文献】