Pilot Demonstration of Enhanced Oil Recovery by Micellar Polymer Waterflooding. Phase B. Quarterly Report,First Quarter 1978.

摘要

A contract between the City of Long Beach and ERDA provided for the design and implementation of a micellar-polymer tertiary waterflood project in the HXa sand,Fault Block VB,Wilmington Oil Field. The purpose of this field test is to demonstrate an improved oil recovery process which will displace economic quantities of otherwise nonrecoverable viscous oil from this reservoir,as well as to determine its suitability for application to other sites. A mini-injectivity test was initiated in Well FT-1on January 12, 1978. A sulfonate slug,using Stepan's ''Petrostep'' 450,was injected and followed by the injection of a mobility buffer polymer mixed with fresh water at a product concentration of about 4000ppM,followed by the injection of a more concentrated solution of 8000ppM. Injection of a 4000ppM solution of Cyanatrol 950 S was initiated in Well FT-1. The rapidly deteriorating injectivity of the Cyanatrol 950 S indicated that the prior injection of extremely high concentrations of Cyanatrol 940 S had plugged this well. A clean-out treatment was apparently successful,and the entire polymer injection test was rerun. The first step of a comprehensive fluid systems design program using native material in disc floods was initiated with additional laboratory equipment having been dedicated to this project. The first step of this program involves the slug optimization phase in which the most cost-effective sulfonate slug will be established. The drilling program is proceeding on schedule with four injection wells and four producing wells having been completed. The objectives of the transient test are to locate the Pier A Fault more precisely and to determine the degree of reservoir continuity throughout the test area. (ERA citation 04:002404)