Improved Secondary Oil Recovery by Controlled Water Flooding-Pilot Demonstration,Ranger Zone,Fault Block VII,Wilmington Field:Phase I. Quarterly Report,October--December 1977.

摘要

Progress in an improved waterflood demonstration of caustic waterflooding in a typical,well flood pattern of the Ranger Zone of the Long Beach Unit portion of the Wilmington Field is reported. Two alkaline flood processes are to be tested in this demonstration. The laboratory core flood testing continued to progress at a reasonable pace. Comparative core floods to date using the entrapment process (caustic with no salt) have not been encouraging although the concentration and volume of caustic may have been too low. The entrainment process core floods (caustic and salt) appear promising when the caustic concentration and volume are increased. Additional oil-water caustic dehydration testing will be undertaken. While results have not been quantified,softening of Long Beach Unit's produced water for caustic injection with resins appears to be technically practical;economics of this still must be evaluated,however. With encouragement having been obtained from the preliminary caustic-salt floods,facility design,procurement and installation work is again moving forward. The mini-injection test indicated injectivity of the area would be adequate but did point to some unanticipated problems in chemistry,either in the area of analysis techniques or the equilibrium between various alkaline ions. (ERA citation 03:044152)