Methods of fluid loss control, diversion, and sealing using deformable particulates

摘要

Method including the steps of providing a treatment fluid that comprises a base fluid and polymeric particulates and introducing the treatment fluid into a subterranean formation having a temperature above about 65° C. The polymeric particulates comprise a degradable polymer and a plasticizer and exhibit a Tg above about −15° C. When the polymeric particulates are placed into a subterranean formation having a temperature above about 65° C. they transform from rigid form to malleable form and are able to provide fluid loss, seal the rock surfaces for fluid diversion, or plug an area along the annulus of a well bore. The malleable particulates then degrade over time in the subterranean formation.

主权项

1. A method comprising:
providing a treatment fluid that comprises a base fluid and polymeric particulates;
wherein the polymeric particulates comprise a degradable polymer and a plasticizer and exhibit a glass transition temperature (Tg) above about −15° C.;wherein the plasticizer is about 0.25% to about 40% by weight of the polymeric particulate; introducing the treatment fluid into a subterranean formation penetrated by a wellbore and having a bottomhole static temperature from about 40° C.-75° C. such that the particulates transform from rigid to malleable form and are able to provide fluid loss, seal rock surfaces within the subterranean formation for fluid diversion, or plug an area along an annulus of the well bore; and, degrading the malleable particulates over time in the subterranean formation.