Snf Group

Lionel Lauber

Cédrick Favero

The present invention relates to a method for modifying the water permeability of a subterranean formation which comprises oil, said method comprising at least the following steps:

Method for modifying the water permeability of a subterranean formation

The invention relates to a method for modifying the water permeability of a subterranean formation, comprising at least the following steps:

The invention concerns a method for preparing a dispersion of a hydrophilic phase in a lipophilic phase, comprising:&#x2014;a hydrophilic phase comprising at least one water-soluble (co)polymer, &#x2014;a lipophilic phase, &#x2014;at least one interface polymer consisting of at least one monomer of formula (I): Formula (I) in which, &#x2014;R1, R2, R3 are separately a hydrogen atom, a methyl group, a carboxylate group and Z&#x2014;X, &#x2014;Z is chosen from the group comprising C(&#x2550;O)&#x2014;O; C(&#x2550;O)&#x2014;NH; O&#x2014;C(&#x2550;O); NH&#x2014;C(&#x2550;O)&#x2014;NH; NH&#x2014;C(&#x2550;O)&#x2014;O; and a saturated or unsaturated, substituted or unsubstituted carbon chain comprising 1 to 20 carbon atoms capable of comprising one or more heteroatoms chosen from nitrogen and oxygen, &#x2014;X is a group chosen from the alkanolamides, sorbitan esters, ethoxylated sorbitan esters, glyceryl esters, and polyglycosides; and comprising a saturated or unsaturated, linear, branched or cyclic, optionally aromatic, hydrocarbon chain.

Method for preparing a composition comprising a hydrosoluble (co)polymer encapsulated in a shell and use of this composition in assisted oil and gas recovery

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Andrezieux Boutheon, France

Lionel Lauber