METHOD OF PUMPING AQUEOUS FLUID CONTAINING SURFACE MODIFYING TREATMENT AGENT INTO A WELL

摘要

A well treatment fluid contains a surface modifying treatment agent having an anchor and a hydrophobic tail. The surface modifying treatment agent is an organophosphorus acid derivative. After the well treatment fluid is pumped into a well penetrating the subterranean formation, the anchor binds to the surface of the formation. The subterranean formation is a siliceous formation or a metal oxide-containing subterranean formation. The anchor bonds to a Si atom when the formation is a siliceous formation and to the metal of the metal oxide when the formation is a metal oxide-containing formation. After being bound to the surface of the formation, frictional drag within the well is reduced. This allows for faster recovery of formation fluids. The bonding of the surface modifying treatment agent onto the formation may further be enhanced by first pre-treating the formation with an aqueous fluid. By increasing the number of sites for the surface modifying treatment agent to bind onto the surface of the subterranean formation, productivity is improved.

主权项

1. A method of treating a siliceous or metal (M) oxide-containing subterranean formation penetrated by a well comprising:
(a) preparing an aqueous treatment fluid comprising:
(i) a surface modifying treatment agent having an anchor and a hydrophobic tail; and(ii) an aqueous media comprising an organic acid; (b) pumping the aqueous treatment fluid into a well penetrating the subterranean formation; and (c) binding the surface modifying treatment agent to a surface of the subterranean formation by attaching the anchor to the formation.