Bj Services Company

Leonard J Kalfayan

Jeffrey Carl Dawson

Philip James Rae

William Dale Wood

Gino F Di Lullo Arias

Gene F Brock

Jennifer Cutler

Carolyn S Devine

Atikah Bte Ahmad

A fluid flow model is comprised of one cross-flow style core holder and a multitude of standard style core holders, all connected by a concurrent combination of serial and parallel flow paths. The sum of these flow paths yields a fluid flow model that closely approximates a small radial slice of a conventional reservoir. The fluid flow model has particular applicability to estimate the requisite treatment fluid for use in acidizing as well as water control methods.

Fluid flow model and method of using the same

A method of stimulating subterranean formations in oil and gas wells using a high pH buffered acid system. The method may be used to treat sandstone formations wherein the pH buffered acid system is used as the preflush or overflush or both. The method consists of introducing into the well a hydrofluoric acid containing sandstone acidizing solution either prior to or subsequent to introduction of the pH buffered acid system. The pH buffered acid system may further be used in the treatment of carbonate reservoirs. The pH of the buffered acid solution is substantially equivalent to that of the pH of the acidizing solution. The buffered acid solution is void of either hydrofluoric acid or hydrofluoric acid precursors.

Acidizing stimulation method using a pH buffered acid solution

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Houston, TX, United States of America

Leonard J Kalfayan