Impact of clay stabilizer on the methane desorption kinetics and isotherms of Longmaxi Shale,China

作     者：Zhong-Hua Liu Jia-Chun Wang Bao-Jun Bai Yan-Ling Wang Zhong-Hua Liu;Jia-Chun Wang;Bao-Jun Bai;Yan-Ling Wang

作者机构：School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao266580ShandongChina Exploration and Development Research Institute of Daqing Oilfield Co Ltd.Daqing163712HeilongjiangChina Geosciences and Geological and Petroleum EngineeringMissouri University of Science and TechnologyRollaMO65409USA School of Petroleum and Natural Gas EngineeringChongqing University of Science and TechnologyChongqing401332China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2022年第19卷第1期

页      面：234-244页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：supported by the China Scholarship Council(No.201908505143) the Chongqing Research Program of Basic Research and Frontier Technology(No.cstc2017jcyj AX0290/No.cstc2018jcyj AX0563) 

主　　题：Shale gas Clay stabilizer Kinetics Isotherms Adsorption Desorption efficiency 

摘      要：Knowing methane desorption characteristics is essential to define the contribution of adsorbed gas to gas well *** evaluate the synthetic effect of a clay stabilizer solution on methane desorption kinetics and isotherms pertaining to Longmaxi shale,an experimental setup was designed based on the volumetric *** objective was to conduct experiments on methane adsorption and desorption kinetics and isotherms before and after clay stabilizer *** experimental data were a good fit for both the intraparticle diffusion model and the Freundlich isotherm *** analyzed the effect of the clay stabilizer on desorption kinetics and *** show that clay stabilizer can obviously improve the diffusion rate constant and reduce the methane adsorption ***,we analyzed the desorption efficiency before and after treatment as well as the adsorbed methane *** results show that a higher desorption efficiency after treatment can be observed when the pressure is higher than 6.84 ***,the adsorbed methane content before and after treatment all increase when the pressure decreases,and clay stabilizer can obviously promote the adsorbed methane to free gas when the pressure is lower than 19 *** can also be applied to the optimization formulation of slickwater and the design of gas well production.