Oil recovery by low tension waterflooding

Wells – Processes – Distinct – separate injection and producing wells

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

166274, E21B 4322

Patent

active

040087670

ABSTRACT:
Oil recovery by low tension waterflooding in which the common-ion effect is employed to suppress divalent metal ions in the low tension slug. A low tension slug comprising an aqueous medium containing an agent effective to reduce the oil-water interfacial tension is injected into a subterranean oil reservoir in order to displace oil therein to a production system. The low tension slug contains a salt having an anion in common with an alkaline earth metal salt which forms part of the reservoir rock material and which acts as a potential contributor of divalent ions to the slug. Thus where the reservoir rock contains calcium sulfate, sodium sulfate may be used in the low tension slug to suppress solubilization of the calcium sulfate into the low tension slug by the common-ion effect. The low tension slug may be preceded by a pretreatment slug also containing a salt having a common anion with an alkaline earth metal salt in the reservoir rock material.

REFERENCES:
patent: 3175610 (1965-03-01), Osoba
patent: 3369602 (1968-02-01), Fallgatter et al.
patent: 3371710 (1968-03-01), Harvey et al.
patent: 3414053 (1968-12-01), Treiber et al.
patent: 3477508 (1969-11-01), Hurd
patent: 3580337 (1971-05-01), Gogarty et al.
patent: 3788399 (1974-01-01), Feuerbacher 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

Oil recovery by low tension waterflooding does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Oil recovery by low tension waterflooding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oil recovery by low tension waterflooding will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-319774

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