Liquid injectivity in a SAG foam process:Effect of permeability  

作　　者：Jia-Kun Gong Yuan Wang Ridhwan-Zhafri B.Kamarul Bahrim Raj-Deo Tewari Mohammad-Iqbal Mahamad Amir Rouhi Farajzadeh William Rossen 

机构地区：[1]College of Mechanics and Materials,Hohai University,Nanjing,210098,Jiangsu,China [2]College of Water Conservancy&Hydropower Engineering,Hohai University,Nanjing,210098,Jiangsu,China [3]PETRONAS,Kuala Lumpur,50088,Malaysia [4]Department of Geoscience and Engineering,Delft University of Technology,2628 CN,Delft,the Netherlands [5]Shell Global Solutions International B.V.,1031 HW,Amsterdam,the Netherlands

出　　处：《Petroleum Science》2024年第1期302-314,共13页石油科学（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant Nos.U2240210,52279098);the Natural Science Foundation of Jiangsu Province(Grant No.BK20200525);the Fundamental Research Funds for the Central Universities(Grant No.B230201021).We express our gratitude to PETRONAS and Shell Global Solution International B.V.for their support of this work.

摘　　要：Foam is utilized in enhanced oil recovery and CO_(2) sequestration.Surfactant-alternating-gas(SAG)is a preferred approach for placing foam into reservoirs,due to it enhances gas injection and minimizes corrosion in facilities.Our previous studies with similar permeability cores show that during SAG injection,several banks occupy the area near the well where fluid exhibits distinct behaviour.However,underground reservoirs are heterogeneous,often layered.It is crucial to understand the effect of permeability on fluid behaviour and injectivity in a SAG process.In this work,coreflood experiments are conducted in cores with permeabilities ranging from 16 to 2300 mD.We observe the same sequence of banks in cores with different permeabilities.However,the speed at which banks propagate and their overall mobility can vary depending on permeability.At higher permeabilities,the gas-dissolution bank and the forced-imbibition bank progress more rapidly during liquid injection.The total mobilities of both banks decrease with permeability.By utilizing a bank-propagation model,we scale up our experimental findings and compare them to results obtained using the Peaceman equation.Our findings reveal that the liquid injectivity in a SAG foam process is misestimated by conventional simulators based on the Peaceman equation.The lower the formation permeability,the greater the error.

关 键 词：Foam Enhanced oil recovery Surfactant-alternating-gas INJECTIVITY PERMEABILITY 

分 类 号：TE311[石油与天然气工程—油气田开发工程]