A Geochemical Model of Fluids and Mineral Interactions for Deep Hydrocarbon Reservoirs

Figure 5

Molality of total carbon dissolved in water varying with depth at different salinities and gas compositions. Dashed yellow line represents the case of pure CH₄ of gas in the system. Blue lines represent results from fluid-calcite systems (with gas composition CO₂ : CH₄ = 1 : 9 in mole). Red lines with dots represent the result from fluid-dolomite systems (with gas composition CO₂ : CH₄ = 1 : 9 in mole).