Hydrogeochemical Simulation of Water-Rock Interaction Under Water Flood Recovery in Renqiu Oilfield, Hebei Province, China

摘要

Hydrogeochemical simulation is an effective method to study water-rock interaction. In this paper, PHREEQM was used for the simulation of water-rock interaction under water Flooding in the Renqiu Oilfield. Calculated results revealed that when fresh water was injected Into the reservoir, Cl~- and Na~+ would decrease without involvement in water-rock interaction. Erosion to dolomite will lead to an increase in Ca~2+, Mg~2+, and CaHCO~+_3. Saturation index of Calcite and aragonite decreased first and then increased.