Alejandro A Pena

US Patent:

7494957, Feb 24, 2009

Filed:

Jan 24, 2005

Appl. No.:

11/042215

Inventors:

Alejandro Pena - Houston TX, US
Golchehreh Salamat - Sugar Land TX, US
Lijun Lin - Stafford TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

C09K 8/035
C09K 8/20
E21B 43/25

US Classification:

507211, 507240, 507244, 507246, 507248, 1662441

Abstract:

The present invention relates to novel aqueous wellbore treatment fluids containing a gas component, a heteropolysaccharide, an electrolyte, and a surfactant, wherein the fluids may further include an organoamino compound. The fluids exhibit good rheological properties at elevated temperatures. Methods of use of fluids comprising at least an aqueous medium, a gas component, a heteropolysaccharide and a surfactant for hydraulically fracturing, well cleanup and gravel packing operations, are also disclosed.

US Patent:

7531483, May 12, 2009

Filed:

Mar 20, 2006

Appl. No.:

11/384686

Inventors:

Alejandro Pena - Houston TX, US
Golchehreh Salamat - Sugar Land TX, US
Lijun Lin - Stafford TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

C09K 8/035
C09K 8/20
C09K 8/68
E21B 43/25
E21B 37/06
E21B 33/10
E21B 43/04

US Classification:

507211, 507240, 507244, 507246, 507248, 166278, 1663082, 1663086

Abstract:

The present invention relates to novel aqueous wellbore treatment fluids containing a gas component, a heteropolysaccharide, an electrolyte, and a surfactant, wherein the fluids may further include an organoamino compound. The fluids exhibit good rheological properties at elevated temperatures. Methods of using fluids containing at least an aqueous medium, a gas component, a heteropolysaccharide and a surfactant for hydraulically fracturing, well cleanup and gravel packing operations, are also disclosed.

US Patent:

7781380, Aug 24, 2010

Filed:

Jan 25, 2006

Appl. No.:

11/339015

Inventors:

Lijun Lin - Stafford TX, US
Alejandro Pena - Houston TX, US
Golchehreh Salamat - Sugar Land TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

C09K 8/68
E21B 43/04

US Classification:

507211, 507202, 507214, 507240, 507244, 507245, 507248, 507260, 507265, 507267, 507271, 507273, 166278, 1663081, 166309, 166311

Abstract:

Disclosed are methods of treating subterranean formations with rapidly hydratable treatment fluids based upon heteropolysaccharides. In particular, the invention relates to treatment methods with fluids containing a heteropolysaccharide, aqueous medium, and an electrolyte, wherein the fluids may further include a gas component, a surfactant and/or an organoamino compound. The fluids exhibit good rheological properties at elevated temperatures, and unusually rapid hydration rates which allows utilizing such fluids without the need of hydration tanks.

US Patent:

8207094, Jun 26, 2012

Filed:

Jul 8, 2008

Appl. No.:

12/169303

Inventors:

Richard D. Hutchins - Sugar Land TX, US
Ann M. W. Hoefer - Houston TX, US
Stanley B. McConnell - Katy TX, US
Alejandro Pena - Houston TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

C09K 8/60

US Classification:

507235, 507202, 507211, 507215, 507216, 507217, 507219, 507240, 507241, 507245, 507271, 507273, 507276, 166309

Abstract:

This invention relates to fluid compositions used in treating a subterranean formation. In particular, the invention is aqueous wellbore treatment compositions which are foams containing a viscosifying agent, a foam extender, a gas component, and a surfactant, as well as methods of forming such fluids, and uses thereof. The viscosifying agent may be a hydratable polymer, viscoelastic surfactant, or heteropolysaccharide. The foam extender may be a material such as a polyoxyalkyleneamines, ethylenepolyamines, tertiary polyamines, bicarbonate, carbonate, phosphate, or sesquicarbonate.

US Patent:

20050098315, May 12, 2005

Filed:

Nov 11, 2003

Appl. No.:

10/605975

Inventors:

Samuel Danican - Houston TX, US
Golchehreh Salamat - Sugar Land TX, US
Alejandro Pena - Houston TX, US
Erik Nelson - Houston TX, US

Assignee:

SCHLUMBERGER TECHNOLOGY CORPORATION - Sugar Land TX

International Classification:

E21B033/13

US Classification:

166281000

Abstract:

It is proposed a method for completing an unconsolidated interval, including particulates, in a subterranean formation, including a consolidation steps. The consolidation step is performed by injection of an aqueous solution of colloidal particles with a pH modifier and/or an ionic-strength modifier. A hard gel is formed that holds the particulates together. The consolidation is followed by hydraulic fracturing. Diversion towards area of less permeability may be enhanced by the use of micrometric particles.

US Patent:

20070042913, Feb 22, 2007

Filed:

Aug 17, 2005

Appl. No.:

11/205560

Inventors:

Richard Hutchins - Sugar Land TX, US
Ann Hoefer - Houston TX, US
Stanley McConnell - Katy TX, US
Alejandro Pena - Houston TX, US

International Classification:

C09K 8/60

US Classification:

507269000, 507214000

Abstract:

This invention relates to fluid compositions used in treating a subterranean formation. In particular, the invention is aqueous wellbore treatment compositions which are foams containing a viscosifying agent, a foam extender, a gas component, and a surfactant, as well as methods of forming such fluids, and uses thereof. The viscosifying agent may be a hydratable polymer, viscoelastic surfactant, or heteropolysaccharide. The foam extender may be a material such as a polyoxyalkyleneamines, ethylenepolyamines, tertiary polyamines, bicarbonate, carbonate, phosphate, or sesquicarbonate.

US Patent:

20110083849, Apr 14, 2011

Filed:

Nov 19, 2010

Appl. No.:

12/950180

Inventors:

Oleg Medvedev - Novosibirsk, RU
Alejandro Pena - Katy TX, US
Timothy Lesko - Carrollton TX, US
J. Ernest Brown - Fort Collins CO, US
Dean M. Willberg - Salt Lake City UT, US
Ivan V. Kosarev - Moscow, RU
Anatoly Medvedev - Moscow, RU

International Classification:

E21B 43/267

US Classification:

1662801

Abstract:

A method of heterogeneous proppant placement in a subterranean fracture is disclosed. The method comprises injecting a first treatment fluid comprising a gas and substantially free of macroscopic particles through a wellbore to initiate a fracture in a subterranean formation; injecting a second treatment fluid comprising proppant and channelant through the wellbore into the fracture; placing the proppant in the fracture in a plurality of proppant clusters forming pillars spaced apart by the channelant; and removing the channelant to form open channels around the pillars for fluid flow from the subterranean formation through the fracture toward the wellbore.

US Patent:

20120325472, Dec 27, 2012

Filed:

Jul 13, 2012

Appl. No.:

13/548760

Inventors:

Fedor Nikolaevich Litvinets - Biysk, RU
Andrey Vladimirovich Bogdan - Novosibirsk, RU
Sergey Mikhailovich Makarychev-Mikhailov - St. Petersburg, RU
Oleg Medvedev - Kyiv, UA
Alejandro Pena - Katy TX, US
Konstantin Mikhailovich Lyapunov - Novosibirsk, RU
Alexander Vuacheslavovich Mikhaylov - Novosibirsk, RU
Timothy M. Lesko - Sugar Land TX, US
J. Ernest Brown - Fort Collins CO, US
Dean M. Willberg - Salt Lake City UT, US
Ivan Vitalievich Kosarev - Moscow, RU
Anatoly Vladimirovich Medvedev - Moscow, RU
Jonathan Abbott - Didcot, GB
Alexander Alexandrovich Burukhin - Moscow, RU

International Classification:

E21B 43/267

US Classification:

1662801

Abstract:

A method of heterogeneous proppant placement in a subterranean fracture is disclosed. The method comprises injecting well treatment fluid including proppant () and proppant-spacing filler material () through a wellbore () into the fracture (), heterogeneously placing the proppant in the fracture in a plurality of proppant clusters or islands () spaced apart by the material (), and removing the filler material () to form open channels () around the pillars (). The filler material can be dissolvable particles, initially acting as a consolidator during placement of the proppant in the fracture, and later dissolving to leave flow channels between the proppant pillars. The well treatment fluid can include extrametrical materials to provide reinforcement and consolidation of the proppant and, additionally or alternatively, to inhibit settling of the proppant in the treatment fluid.