Chemical blowing agents for improved sweep efficiency

Wells – Processes – Distinct – separate injection and producing wells

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

166273, 166274, 166294, 166300, E21B 33138, E21B 4322

Patent

active

048134848

ABSTRACT:
A process for generating gas in-situ where a decomposable chemical blowing agent is utilized in combination with an aqueous medium. When a slug of the aqueous medium containing said blowing agent is injected into the formation, heat from the formation, coinjected activators, reservoir fluids, or formation mineralogy causes said blowing agent to decompose thereby generating a gas. This gas forms bubbles which close pores in a more permeable zone of a formation which causes a drive fluid to be diverted into a less permeable zone for removal of hydrocarbonaceous fluids therefrom. Bubbles can also be formed by incorporating a water thickening amount of a water soluble polymer or gel into an aqueous medium containing a decomposable chemical blowing agent. A foam can be made in-situ by placing into an aqueous medium, a surfactant and a decomposable chemical blowing agent. In-situ generated bubbles or foam can be used to divert a drive fluid into a formation's less permeable zone.

REFERENCES:
patent: Re30935 (1982-05-01), Richardson et al.
patent: 2761511 (1956-09-01), Billue
patent: 2866507 (1958-12-01), Bond et al.
patent: 3305016 (1967-02-01), Lindblom et al.
patent: 3508612 (1970-04-01), Reisberg et al.
patent: 3599717 (1971-08-01), McMillen
patent: 3908760 (1975-09-01), Clampitt et al.
patent: 3977470 (1976-08-01), Chang
patent: 3993133 (1976-11-01), Clampitt
patent: 4008769 (1977-02-01), Chang
patent: 4232741 (1980-11-01), Richardson et al.
patent: 4300634 (1981-11-01), Clampitt
patent: 4331543 (1982-05-01), Wilson et al.
patent: 4450010 (1984-05-01), Burkhalter et al.
patent: 4453596 (1984-06-01), Conway et al.
patent: 4667741 (1987-05-01), Phelps et al.
patent: 4676318 (1987-06-01), Myers et al.
patent: 4694906 (1987-09-01), Hutchins et al.
patent: 4705810 (1987-11-01), Millet et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Chemical blowing agents for improved sweep efficiency does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chemical blowing agents for improved sweep efficiency, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical blowing agents for improved sweep efficiency will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-471287

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.