Described herein are treated polymers comprising a polyacrylamide homopolymer or a copolymer thereof having at least 30 mol % acrylamide residue content and a weight average molecular weight in the range of 1×10.sup.5 g/mol to 1×10.sup.8 g/mol, and 0.1 wt % to 10 wt % of a C1-C6 alkyl ricinoleate based on the weight of the mixture of polymer and alkyl ricinoleate. The polymers are in powder form and include less than about 30 wt % water based on the powder weight. The treated polymer powders dissolve rapidly in water and develop very little or even no insoluble gel upon diluting with water, even when the water is produced water or connate. The treated polymer solutions are useful for in-the-field rapid dilution for applications such as papermaking, flocculation, beneficiation, wastewater treatment, and enhanced oil recovery.

The present disclosure relates to fluid loss control agents for use in a water-based wellbore fluid. The fluid loss control agents generally include non-crosslinked copolymers of non-carboxylated monomers. The present disclosure also relates to water-based wellbore fluids containing the above fluid loss control agents and to methods of servicing a wellbore in a subterranean formation by placing the water-based wellbore fluids in the wellbore.

The present disclosure relates to fluid loss control agents for use in a water-based wellbore fluid. The fluid loss control agents generally include non-crosslinked copolymers of non-carboxylated monomers. The present disclosure also relates to water-based wellbore fluids containing the above fluid loss control agents and to methods of servicing a wellbore in a subterranean formation by placing the water-based wellbore fluids in the wellbore.

Systems and methods for enhanced or improved oil recovery includes injecting a Y-Grade NGL enhanced oil recovery fluid through an injection well into a hydrocarbon bearing reservoir to mobilize and displace hydrocarbons. The Y-Grade NGL enhanced oil recovery fluid comprises an unfractionated hydrocarbon mixture. Simultaneously and/or subsequently, a mobility control fluid is injected into the hydrocarbon bearing formation. Hydrocarbons from the hydrocarbon bearing reservoir are produced through a production well or the same injection well.

Systems and methods for enhanced or improved oil recovery includes injecting a Y-Grade NGL enhanced oil recovery fluid through an injection well into a hydrocarbon bearing reservoir to mobilize and displace hydrocarbons. The Y-Grade NGL enhanced oil recovery fluid comprises an unfractionated hydrocarbon mixture. Simultaneously and/or subsequently, a mobility control fluid is injected into the hydrocarbon bearing formation. Hydrocarbons from the hydrocarbon bearing reservoir are produced through a production well or the same injection well.

A method and compounds for enhanced oil recovery (EOR) including flooding of a mixture of water and one or more of the compounds in a geological formation. The compounds have a fluoroalkyl group.

A method and compounds for enhanced oil recovery (EOR) including flooding of a mixture of water and one or more of the compounds in a geological formation. The compounds have a fluoroalkyl group.

An installation for storing, metering, and dissolving water-soluble polymer particles, in particular for enhanced oil and/or gas recovery operations, includes a so-called “polymer dissolution” container A and at least one so-called “polymer storage and distribution” container B positioned upon container A. The bottom of container B and the roof of container A each have an opening facing one another allowing the passage of the polymer from container B into the supply mechanism of container A. The installation further includes a connection mechanism able to work with the polymer supply mechanism.

An installation for storing, metering, and dissolving water-soluble polymer particles, in particular for enhanced oil and/or gas recovery operations, includes a so-called “polymer dissolution” container A and at least one so-called “polymer storage and distribution” container B positioned upon container A. The bottom of container B and the roof of container A each have an opening facing one another allowing the passage of the polymer from container B into the supply mechanism of container A. The installation further includes a connection mechanism able to work with the polymer supply mechanism.

Multiple charged cationic compounds, which are derived from polyamines through an aza-Michael addition with an α, β-unsaturated carbonyl compound, in a clay treatment composition to reduces clay swelling, clay migration, and sludge formation in a subterranean formation in oil and gas operations are provided. The disclosed methods or compositions are found to be more effective than those methods or compositions commonly used for reducing clay swelling, clay migration, and sludge formation.