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来源：百度知道 编辑：UC知道 时间：2024/09/28 12:32:23
A Description of Chemical Precipitation Mechanisms and Their Role in Formation Damage During Stimula
Summary
A geochemical simulator that allows for mineral dissolution, precipitation, ion-pair complexation and flow with dispersion in a linear porous medium has been developed. The calculations are based on the thermodynamic equilibrium between aqueous species of the fluid phase and mineral assemblages of the solid phase. The simulator has been used to study sandstone acidizing by use of hydrofluoric/hydrochloric (HF/HCl) acid mixtures and specifically to examine the permeability loss commonly encountered when formations are first contacted with these mixtures. Included were 30 different aqueous species and 14 possible mineral species. it was found that when acids are introduced into sandstone media containing aluminosilicate minerals, the formation of chemical precipitates takes place if a maximum allowable HF level for a given HCl level is exceeded. Further, the permeabilit

A Description of Chemical Precipitation Mechanisms and Their Role in Formation Damage During Stimula
Summary
A geochemical simulator that allows for mineral dissolution, precipitation, ion-pair complexation and flow with dispersion in a linear porous medium has been developed. The calculations are based on the thermodynamic equilibrium between aqueous species of the fluid phase and mineral assemblages of the solid phase. The simulator has been used to study sandstone acidizing by use of hydrofluoric/hydrochloric (HF/HCl) acid mixtures and specifically to examine the permeability loss commonly encountered when formations are first contacted with these mixtures. Included were 30 different aqueous species and 14 possible mineral species. it was found that when acids are introduced into sandstone media containing aluminosilicate minerals, the formation of chemical precipitates takes place if a maximum allowable HF level for a given HCl level is exceeded. Further, the permeab