AMPHIPHILIC BLOCK POLYMERS SOLUBLE IN STRONGLY SALINE MEDIUM

    公开(公告)号:US20180312621A1

    公开(公告)日:2018-11-01

    申请号:US15770352

    申请日:2016-10-21

    Abstract: The present invention relates to the preparation of polymers that are of use in particular as a rheology agent, and are suitable for use in very concentrated saline media, which comprises a step of micellar radical polymerization in which are brought into contact, in an aqueous medium: —hydrophilic monomers; —hydrophobic monomers in the form of a micellar solution, containing micelles comprising these hydrophobic monomers; —a radical polymerization initiator; and —preferably an agent for controlling radical polymerization, wherein said micelles comprise at least one surfactant of amphoteric nature. The polymers obtained according to the invention are in particular of use for enhanced oil recovery.

    ZWITTERIONIC SURFACTANTS SUITABLE FOR ENHANCED OIL RECOVERY

    公开(公告)号:US20190153298A1

    公开(公告)日:2019-05-23

    申请号:US16091227

    申请日:2017-03-30

    Abstract: The instant invention relates to surfactants having the following formula (I) wherein: each of Ra and Rb is a a linear or branched, saturated or unsaturated, hydrocarbon chain, each of Rc and Rd is a alkyl chain having 1 to 10 carbon atoms, each of (E1) and (E2) is a divalent hydrocarbon radical, A is: a group a carboxylate group —COO− (optionally in all or part in the form —COOH); or a sulfonate group —SO3− (optionally in all or part in the form —SO3H). The invention also relate to the preparation of these surfactants and their use in oil extraction, especially in EOR applications.

    AMINOSULPHONATE FOAM STABILIZERS
    7.
    发明申请

    公开(公告)号:US20170107421A1

    公开(公告)日:2017-04-20

    申请号:US15311305

    申请日:2015-05-04

    CPC classification number: C09K8/584 C09K8/594 C09K8/94 E21B43/168

    Abstract: The present invention relates to the use of an aminosulphonate compound corresponding to the following formula (I): R1R2N—CHR3—CHR4—CHR5—SO3− (I) where: R1 is a preferably C2 to C24 alkyl or alkylamido radical; R2 is an optionally hydroxylated alkyl radical; R3, R4 and R5 are, independently of one another, H or OH; it being understood that at least one of the R3, R4 and/or R5 groups is OH, for stabilizing a foam, in particular a foam used to extract hydrocarbons in an underground formation.

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