Improved Secondary Oil Recovery by Controlled Water Flooding-Pilot Demonstration Ranger Zone,Fault Block VII,Wilmington Field:Phase I. Quarterly Report,October--December 1976.

摘要

The project is an improved waterflood demonstration of caustic water-flooding in a typical,well flood pattern of the Ranger Zone of the Long Beach Unit portion of the Wilmington Field. Two alkaline flood processes are to be used in this demonstration:caustic in softened fresh water is to be injected (entrapment process) to improve sweep efficiency,followed by caustic and salt (entrainment process) to improve flood displacement efficiency. The demonstration involves the input of 30,000 B/D water in 8injection wells which surround 11active producers in an area of 95acres. Improved flood efficiency should occur as demonstrated by reduced water-oil-ratios and increased oil recovery. Surface and subsurface design work is progressing satisfactorily. The redrill,coring and special logging of one producer B-827A was completed and the well placed on production. Producing well B-712was found to have a defective liner. Injector B-828-I was found to have a leaking shoe joint on the water string. Low temperature thermal stimulation of producing Well B-711immediately adjacent to the pilot area was completed. Routine testing of cores from B-827-A was begun. The milestone chart for the project was revised in November, 1976. Approval of this change is being awaited. Expanded detail of the milestone chart with regard to the core testing and the mini-injection test were prepared. A map of the area and three performance plots are included. (ERA citation 03:034498)