Evaluation of sour gas-low salinity waterflooding in carbonate reservoirs-A numerical simulation approach

作     者：Lawrence Opoku Boampong Roozbeh Rafati Amin Sharifi Haddad Lawrence Opoku Boampong;Roozbeh Rafati;Amin Sharifi Haddad

作者机构：School of EngineeringUniversity of AberdeenFN371Fraser Noble BuildingSchool of EngineeringUniversity of AberdeenAB243UEUK 

出 版 物：《Petroleum Research》 (石油研究（英文）)

年 卷 期：2023年第8卷第2期

页      面：131-150页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：LSWF Ghana Education Trust Fund, GETFUND 

主　　题：Low salinity water flooding Zeta potential Wettability alteration Carbonate reservoirs Carbon dioxide storage Sour gas injection 

摘      要：Although significant amount of H_(2)S(sour gas)rich natural gas is estimated globally,but not much attention has been given to the application of H_(2)S in the oil recovery *** studies on the use of H_(2)S in oil recovery processes showed that H_(2)S has the potential of improving the oil recovery,and it can be even more effective than using CO_(2) in some processes.H_(2)S can equally dissolve in the water,react with the reservoir rock to change its surface charge,porosity,and ***,previous in-vestigations on H_(2)S oil recovery attributed the improved oil recoveries to the higher miscibility of H_(2)S in the oil,and the reduction in the oil ***,there is limited understanding on the H_(2)S-oil-brine-rock geochemical interactions,and how they impact the oil recovery *** study aims to investigate the interactions between H_(2)S,oil,and carbonate formations,and to assess how the combi-nation of H_(2)S and low salinity water can impact the wettability and porosity of the reservoirs.A triple layer surface complexation model was used to understand the influence of key parameters(e.g.,pressure,brine salinity,and composition)on the H_(2)S-brine-oil-rock ***,the effects of mineral content of the carbonate rock on H_(2)S interactions were ***,the results of the H_(2)S-oil-brine-rock interactions were compared with a study where CO_(2) was used as the injected *** of the study showed that the seawater and its diluted forms yielded identicalζ-potential values of about 3.31 mV at a pH of *** indicates that at very low pH condition,pH controls the ζ-potential of the oil-brine interface regardless of the brine s ionic *** study further demonstrated that the presence of other minerals in the carbonate rock greatly reduced the calcite *** instance,the calcite dissolution was reduced by 4.5%when anhydrite mineral was present in the carbonate *** from the s