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Distribution,formation and evolution of sand ridges on the East china Sea shelf

Science china(Technological Sciences) 2010年第3期53卷 822-828页

作者： zhao renbao 1,2.sun haitao 3,{2.,2.1moe key laboratory of petroleum engineering,china University of petroleum,Beijing 102.49,china 2.Enhanced Oil Recovering Research Center,china University of petroleum,Beijing 102.49,china 3Faculty of Natural Resource&Information Technology,china University of petroleum,Beijing 102.49,china 1. moe key {2. of petroleum engineering China University of Petroleum Beijing 102249 China2. Enhanced Oil Recovering Research Center China University of Petroleum Beijing 102249 China3. Faculty of Natural Resource & Information Technology China University of Petroleum Beijing 102249 China

Influence of CO2.corrosion on reservoir mineralogical composition,pore structure and their mechanical characteristics was studied using XRD,SEM,rock tri-axial machine and core flow experimental *** was found that the corrosion effect was mainly attributed to rock texture and structure,fluid composition and external dynamical conditions in the experimental *** cores with bedding structures,their bedding surfaces were the preferential corrosion regions,because micro-cracks would evolve at these surfaces in the pressure-releasing ***,for cores with massive structures controlled by stable water environment,the CO2.corrosion would result in pore enlargement and secondary pore *** gas velocity from outlet showed sharp increase in the injection process of CO2.H2. *** could be explained by two changes caused by *** was the opening and closure of *** other was particle *** the corrosion time increased,both tensile strength and compressive strength decreased,which confirmed decrease of cementation *** should also be noted that permeability increase and micro-cracks generation would pose damage to the capacity of CO2.geological storage.

关键词： carbon dioxide geological storage mineralization enhanced oil recovery corrosion

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