ENHANCED OIL RECOVERY PROCESS USING WATER SOLUBLE POLYMERS HAVING IMPROVED SHEAR RESISTANCE
First Claim
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1. An enhanced oil recovery process using high molecular weight water soluble polymer consisting in:
- dispersing said polymer in injection brine,and then injecting the dispersed polymer in the subterranean formation, characterized in that the high molecular weight water soluble polymer contains at least a non-ionic monomer and at least an amphiphilic monomer containing at least a side chain having an HLB above 4.5, said high molecular weight water soluble polymer having a molecular weight of more than 10 000 000.
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Abstract
An enhanced oil recovery process using high molecular weight water soluble polymer consisting in: —dispersing said polymer in injection brine, —and then injecting the dispersed polymer in the subterranean formation, characterized in that the high molecular weight water soluble polymer contains at least a non-ionic monomer and at least an amphiphilic monomer containing at least a side chain having an HLB above 4.5, said high molecular weight water soluble polymer having a molecular weight of more than 10 000 000.
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Citations
9 Claims
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1. An enhanced oil recovery process using high molecular weight water soluble polymer consisting in:
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dispersing said polymer in injection brine, and then injecting the dispersed polymer in the subterranean formation, characterized in that the high molecular weight water soluble polymer contains at least a non-ionic monomer and at least an amphiphilic monomer containing at least a side chain having an HLB above 4.5, said high molecular weight water soluble polymer having a molecular weight of more than 10 000 000. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification