Halliburton Energy Services, Inc.

Bobby J Burns

Richard W Pauls

Thomas Donovan Welton

Ian D Robb

Rajesh Kumar Saini

Harold Grayson Walters

David Eugene McMechan

Jason E Bryant

Michael Wayne Sanders

Phillip C Harris

Trinidad Munoz, Jr

Stanley J Heath

Sean R Beach

Jeffery L Mundy

Christina A Parkinson

Methods for creating a fluid diverting barrier in a zone of a subterranean formation are provided. Certain methods comprise providing a treatment fluid that comprises an aqueous base fluid, a viscoelastic surfactant, and a soap component; placing the treatment fluid in a subterranean formation penetrated by a well bore; and allowing the soap component of the treatment fluid to interact with a metal ion present in the subterranean formation to form a precipitate.

Utilization of surfactant as conformance materials

The invention provides a method for treating a subterranean formation penetrated by a wellbore, the method comprising the steps of formulating a treatment fluid and introducing the treatment fluid through the wellbore. The treatment fluid comprises water; diutan; and a sufficient amount of salt to increase the density of the treatment fluid to at least 8.5 lb/gal, wherein at least 50% by weight of the salt is selected from the group consisting of: bromide salts, non-bromide salts having a higher salting-in effect than bromide according to the Hofmeister series as measured by the salt's effect on the cloud point of poly(ethylene oxide) that has a molecular weight of 4&#xd7;10, and any combination in any proportion thereof. The invention also provides a treatment fluid for use in a subterranean formation penetrated by a wellbore, the treatment fluid comprising: water; diutan; and a sufficient amount of salt to increase the density of the treatment fluid to at least 8.5 lb/gal, wherein at least 50% by weight of the salt is selected from the group consisting of: bromide salts, non-bromide salts having a higher salting-in effect than bromide according to the Hofmeister series as measured by the salt's effect on the cloud point of poly(ethylene oxide) that has a molecular weight of 4.10, and any combination in any proportion thereof.

Methods and compositions of controlling the rheology of a diutan-containing well treatment fluid at high temperatures

Methods are provided that include a method comprising providing a viscosified treatment fluid comprising a base fluid and a gelling agent that comprises a clarified xanthan; and placing the viscosified treatment fluid into at least a portion of a subterranean formation. In some embodiments, the method comprises placing the viscosified treatment fluid into at least a portion of a subterranean formation at a pressure sufficient to create or enhance at least one fracture in the subterranean formation. In some embodiments, the viscosified treatment fluid may also comprise a plurality of particulates. In some embodiments, the viscosified treatment fluids may be placed into at least a portion of a pipeline. Additional methods are also provided.

Treatment fluids comprising clarified xanthan and associated methods

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Duncan, OK, United States of America

Bobby J Burns