Hydrogeochemistry of chlorine as data source on the process of oil field development

When oil field waterflooding, various hydrogeochemical processes occur in the geofluidal system of the oil-bearing reservoir. These processes disrupt the linear mixing of components of interacting water that is expected to happen based on the principle of concentration diffusion. The purpose of this article is to investigate which component content maintains the lineal principle of concentrations change during the mixing of waters when waterflooding. Calculations were conducted for two oil field areas in Western and Eastern Siberia, comparing the ratio of water that injected to maintain reservoir pressure and reservoir water in the produced water. The results of these calculations showed that mineralization and chlorine calculations demonstrate same ratio levels, unlike other components. This led to the conclusion that chlorine is the most stable component and can serve as an easily identifiable parameter in laboratory conditions to calculate the ratios of waters in mixtures during the process of oil fields development.