Methods and compositions for sand control in injection wells

摘要

Methods including the steps of providing an injection well having unconsolidated particulates in one or more formation intervals along the wellbore that accept injection fluid; providing a consolidating treatment fluid comprising a base fluid and a consolidating agent; introducing the consolidating treatment fluid through the injection well, while the well is under injection, such that the consolidating treatment fluid enters into a portion of a formation interval along the wellbore that accepts injection fluid; and, allowing the consolidating fluid to consolidate formation particulates therein. The methods may be performed such that the percentage of consolidating agent varies over the course of the treatment or the rate of injection varies over the course of the treatment.

主权项

1. A method comprising:
providing an injection well wherein the injection well includes unconsolidated particulates in one or more formation intervals along a wellbore that accepts injection fluid; providing a consolidating treatment fluid comprising a base fluid and a consolidating agent wherein the consolidating agent comprises a tackifying agent present at a concentration of about 0.01% to about 1% by volume of the consolidating treatment fluid ; introducing the consolidating treatment fluid through the injection well, while the well is under injection, such that the consolidating treatment fluid enters into a portion of a formation interval along the wellbore that accepts injection fluid;
wherein the tackifying agent is introduced into the portion of a subterranean formation through the injection well in a tapered concentration such that it is first introduced in a higher concentration and the concentration is continuously reduced; and, allowing the consolidating fluid to consolidate formation particulates therein.