Importance

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Abstract

A method for consolidating unconsolidated mineral particles in a subterranean petroleum formation penetrated by a well in fluid communication with at least a portion of the formation, including: a) introducing an effective amount of preflush into the formation sufficient to invade substantially all of the pore spaces of a portion of the formation to be consolidated, said preflush including an ester, and an oligomer or monomer of the compound from which the resin to be used in the consolidation is obtained, an ester, and an effective amount of a coupling agent; b) introducing a sand consolidating fluid into substantially the same portion of the formation as the preflush fluid, the sand consolidating fluid containing a polymerizable compound, a diluent for the polymerizable compound and an acid catalyst capable of causing condensation polymerization of the compound at fluid injection temperatures; and c) allowing the injected fluid to remain in the formation for a period of time sufficient to accomplish at least partial polymerization of the monomer, forming a permeable consolidated mass around the wellbore.

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First Claim