FAMILIES OF SALT DEPOSIT INHIBITORS, HAVING EXCELLENT ABSORPTION PROFILES, AND THEIR APPLICATION IN THE OIL FIELD

摘要

1. A method of inhibiting the formation of salt deposits in an oil field, comprising the steps of: a) introducing at least two incoming fluid streams into at least two productive zones of the oil well connected to the oil field, or at least into two different oil producing wells, from which at least two effluents from two zones or wells are combined before recovery with a salt scale inhibitor containing detectable groups introduced into the oil field (s) and / or into the liquid, and two different salt deposition inhibitors, each of which is intended for each of two zones or wells, wherein said various salt deposition inhibitors contain different detectable groups due to their excellent absorption maxima, which are distinguished by analytical methods for absorption; b) oil displacement; c) extraction of the liquid outflow containing oil; d) measuring in various inhibitors of salt deposits in the extracted fluid stream by an analytical method for absorption or fluid obtained from it; e) it is not necessary to solve the problem of salt formation that occurs in the zone or well for which the salt inhibitor is intended if the amount of the salt inhibitor is less than a specified value, where one of the two excellent salt inhibitors is a polymer (P1) as obtained by polymerization : ethylenically unsaturated carboxylic monomer; ethylenically unsaturated sulfonic monomer or its water soluble salts; styrene