Method of completing poorly consolidated formations
AssigneeSchlumberger Technology Corporation
InventorsSamuel Danican, Golchehreh Salamat, Alejandro Pena, Erik Nelson
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Abstract
It is proposed a method for completing an unconsolidated interval, including particulates, in a subterranean formation, including a consolidation steps. The consolidation step is performed by injection of an aqueous solution of colloidal particles with a pH modifier and/or an ionic-strength modifier. A hard gel is formed that holds the particulates together. The consolidation is followed by hydraulic fracturing. Diversion towards area of less permeability may be enhanced by the use of micrometric particles.
Claims25
A method for completing an unconsolidated interval, including particulates, in a subterranean formation, including the step of consolidating said interval by injecting an aqueous solution of colloidal particles and of at least one element selected from the group consisting of a pH modifier and/or an ionic-strength modifier to form a hard gel that holds the particulates together and then, the step of hydraulically fracturing the consolidated interval.
A method for completing an unconsolidated interval, including particulates, in a subterranean formation, including the step of consolidating said interval by injecting into said interval an aqueous solution of colloidal silica, of micrometric particles, of a pH modifier and/or of an ionic-strength modifier to form a hard gel that holds the particulates together and then, the step of hydraulically fracturing the consolidated interval.
Dependencies are inferred from the claim text.