Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1985-04-24
1988-11-08
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524291, 524314, 524417, 524424, 524428, 524437, 524521, 524523, C09K 700
Patent
active
047834927
ABSTRACT:
A composition for selectively reducing the permeability of the higher permeability zones of a subterranean reservoir having heterogeneous permeability, such permeability reduction extending continuously from nearby the well as far into the reservoir as is desired. Said composition comprises an aqueous solution or solutions of a water-soluble polymer, a material capable under certain conditions of at least partially cross-linking the polymer to form a gelatinuous precipitate, a water-soluble alkaline material in an amount sufficient to maintain the pH of the polymer-containing composition above the pH at which cross-linking occurs until the composition has passed a desired distance through the reservoir, and a temperature-activated water-soluble acidic material dissolved in the aqueous solution in an amount sufficient to lower the pH of the overall solution to the pH at which cross-linking occurs when said solution is subjected to an elevated temperature. When injected into a reservoir, the composition forms a continuous gelatinuous plug which extends from the immediate vicinity of the well to a point as close to the well as about 20 feet, when it is desired to plug a feature of the strata which extends only a short distane therein, or as far into the well as is desired, for example up to 200 feet, when it is desired to plug an extensive zone of high permeability.
REFERENCES:
patent: 3421584 (1969-01-01), Eilers et al.
patent: 3615794 (1971-10-01), Nimerick
patent: 3687200 (1972-08-01), Routson
patent: 3740360 (1973-06-01), Nimerick
patent: 3743613 (1973-07-01), Coulter
patent: 3762476 (1973-10-01), Gall
patent: 3794115 (1974-02-01), Skagerberg
patent: 3795276 (1974-03-01), Eilers
patent: 3825067 (1974-07-01), Vestal
patent: 3841399 (1974-10-01), Ryan
patent: 4009755 (1977-03-01), Sandiford
patent: 4015995 (1977-04-01), Hess
patent: 4018286 (1977-04-01), Gall et al.
patent: 4043922 (1977-08-01), Palmer et al.
patent: 4069869 (1978-01-01), Sandiford
patent: 4098337 (1978-07-01), Argabright et al.
patent: 4199625 (1980-04-01), Pilny et al.
patent: 4349443 (1982-09-01), Block
patent: 4413680 (1983-11-01), Sandiford et al.
patent: 4460751 (1984-07-01), Hanlon et al.
patent: 4461351 (1984-07-01), Falk
patent: 4461352 (1984-07-01), Falk
patent: 4485875 (1984-12-01), Falk
patent: 4564070 (1986-01-01), Norton
Dovan Hoai T.
Hutchins Richard D.
Lambert Howard R.
Reddick J. M.
Schofer Joseph L.
Union Oil Company of California
Wirzbicki G.
LandOfFree
Continuous permeability reduction in subterranean reservoirs does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous permeability reduction in subterranean reservoirs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous permeability reduction in subterranean reservoirs will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-464388