Acid-rock reaction kinetics in a two-scale model based on reaction order correction  

作　　者：Xue-Song Li Ning Qi Ze-Hui Zhang Lian Liu Xia-Qing Li Xu-Hang Su 

机构地区：[1]School of Petroleum Engineering,China University of Petroleum(East China),Qingdao,266580,Shandong,China [2]Key Lab of Unconventional Oil&Gas Development,Ministry of Education,China University of Petroleum(East China),Qingdao,26650,Shandong,China [3]SINOPEC Northwest Oilfield Branch Company,Urumqi,830011,Xinjiang,China [4]Petroleum Engineering Technology Research Institute,SINOPEC Shengli Oilfield Company,Dongying,257000,Shandong,China

出　　处：《Petroleum Science》2024年第3期2089-2101,共13页石油科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Project No.51874336);the National Key Technologies Research and Development Program of China during the 13th Five-Year Plan Period(Project No.2017ZX005030005)。

摘　　要：The reaction order plays a crucial role in evaluating the response rate of acid-rock.However,the conventional two-scale model typically assumes that the reaction order is constant as one,which can lead to significant deviations from reality.To address this issue,this study proposes a novel multi-order dynamic model for acid-rock reaction by combining rotating disk experimental data with theoretical derivation.Through numerical simulations,this model allows for the investigation of the impact of acidification conditions on different orders of reaction,thereby providing valuable insights for on-site construction.The analysis reveals that higher response orders require higher optimal acid liquid flow rates,and lower optimal H+diffusion coefficients,and demonstrate no significant correlation with acid concentration.Consequently,it is recommended to increase the displacement and use high-viscosity acid for reservoirs with high calcite content,while reducing the displacement and using low-viscosity acid for reservoirs with high dolomite content.

关 键 词：Reaction order Two-scale model Wormhole propagation Carbonate rocks Numerical simulation 

分 类 号：TE311[石油与天然气工程—油气田开发工程]