Title: Process of combination of the surfactant huff-puff with selective water shut off and its application
Abstract: According to the fact that there is too much the remaining oil in water flushed zone after polymer flooding in Lamadian Oilfield,we have used the high oil washing ratio of surfactant and the technology of water plugging and profiling of water based weak gel,the combination of the surfactant huff-puff with selective water shut off in production wells has been developed.Application result shows that the low-cost selective water shut off formula composed of with polymer and crosslinker can completely meet the demand of practical application,the plugging rate of laboratory core experiment is over 98.9 % and the breakthrough pressure is above 9MPa,ultimate plugging rate after 30PV erosive test is kept above 97.3%.The water flooding sweep efficiency after polymer flooding can be enhanced further and oil displacement efficiency is enhanced by using the high cleaning efficiency of surfactant,the aim of both decreasing water cut and increasing oil productive capacity has been attained.In this way,three types oil well experiments at different period(the middle period of polymer flooding,later stage of polymer flooding,subsequent water flooding after polymer flooding)were conducted in Lamadian Oilfield,the effect of both decreasing water cut and increasing oil productive capacity can be attained.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot