US 10,865,279 B2Granted

Methods and systems for generating aqueous polymer solutions

AssigneeChevron U.S.A. Inc.

InventorsDo Hoon Kim, Dennis A. Alexis, Varadarajan Dwarakanath, David R. Espinosa, Taimur Malik, Peter G. New, Adam C. Jackson, Christopher Michael Niemi

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Abstract

Provided herein are liquid polymer (LP) compositions comprising a synthetic (co)polymer (e.g., an acrylamide (co)polymer), as well as methods for preparing aqueous polymer solutions by combining these LP compositions with an aqueous fluid. The resulting aqueous polymer solutions can have a concentration of a synthetic (co)polymer (e.g., an acrylamide (co)polymer) of from 50 to 15,000 ppm, and a filter ratio of 1.5 or less at 15 psi using a 1.2 μm filter. Also provided are methods of using these aqueous polymer solutions in oil and gas operations, including enhanced oil recovery.

Claims18

Dependent claims

A single-stage polymer mixing system, the system comprising:

(i) a main polymer feed line diverging to a plurality of polymer supply branches;
(ii) a main aqueous feed line diverging to a plurality of aqueous supply branches;
and
(iii) a plurality of mixer arrangements, each of which comprises an in-line mixer having a mixer inlet and a mixer outlet;
wherein each of the plurality of mixer arrangements is supplied by one of the plurality of polymer supply branches and one of the plurality of aqueous supply branches;
and
wherein the main polymer feed line is fluidly connected to a liquid polymer (LP) supply;
wherein the aqueous feed line is fluidly connected to an aqueous supply;
and
wherein the mixer outlet of each of the plurality of mixer arrangements is fluidly connected to at least one injection well.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/441,851Filed 14 Jun 2019 · continuation
Priority: 7 Dec 2016
Published: US 2019/0367685 A15 Dec 2019
Granted: 15 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

C08J 3/005
Processes of treating or compounding macromolecular substances: processes for mixing polymers
C08J 3/03
Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques: in aqueous media
C09K 8/588
Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids:…
E21B 43/16
Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells: enhanced recovery methods…

Family

Application62/431,255Us provisional application · filed 7 Dec 2016
Application15/835,020Parent of this continuation · filed 7 Dec 2017
US 2019/0367685 A1Pre-grant publication · published 5 Dec 2019
US 10,344,129 B2Parent of this continuation
US 2018/0155505 A1Published application
US 10,865,279 B2This patent

From the US filing history. Foreign family members aren’t listed.

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