Patent ID: 8091646
Filing Date: 2012-01-10
Classification: C09K,E21B

Abstract:
1. A method of removing at least a portion of wellbore reservoir damage from a subterranean reservoir containing non-polar material, the method comprising: pumping a cleaning fluid into the subterranean reservoir to contact the cleaning fluid with the non-polar material in the wellbore reservoir damage, where the cleaning fluid comprises: forming a single phase microemulsion (SPME, Winsor IV) in situ in the subterranean reservoir, where the in situ-formed SPME is a thermodynamically stable, macroscopically homogeneous mixture of at least three components, where the three components are: a polar phase from the polar fluid, the non-polar material, and the at least one surfactant; incorporating at least part of the non-polar material into the single phase microemulsion; and removing the single phase microemulsion incorporating the non-polar material from the reservoir damage in the subterranean reservoir.