Injection of incompatible waters in hydrocarbon reservoirs : Simulation by chemical equilibrium models in porous media
Scale precipitation in oil reservoirs can occur if water that is chemically incompatible with formation brine is injected. To describe and predict this phenomenon, both laboratory studies and numerical model simulations were carried out. New experimental data were acquired on: - solubility at high temperature of calcium and barium sulphates dissolved in natural aqueous systems; - permeability impairment caused by salt deposition in reservoir rocks (water-wet or oil-wet) of different lithologies; - rock dissolution (mainly for carbonate) and salt reprecipitation caused by the injected water. Simplified simulators able to predict the chemical equilibrium of barium and calcium sulphates were built and successfully tested by matching the experimental data.
Bibliographic Reference: EUR 13346 EN (1991) 116 pp., MF, ECU 8
Record Number: 199110182 / Last updated on: 1994-12-02
Original language: en
Available languages: en