Schlumberger Technology Corporation

Schlumberger Canada Limited

Prad Research and Development Nv

Sofitech N.v.

Services Petroliers Schlumberger Sa

Mathew Samuel

Trevor L. Hughes

Gary J. Tustin

Jesse C. Lee

Diankui Fu

Richard Hutchins

Philip Fletcher

Michael Parris

Golchi Salamat

Keith Dismuke

Bernhard Lungwitz

Jiangshui Huang

Jose Alberto Ortega Andrade

Christopher N Fredd

Fatma Daou

Olga Alexandrovna Minikh

Yiyan Chen

Carlos Abad

Trevor Lloyd Hughes

Gary John Tustin

Jesse Lee

Erik B Nelson

Richard Donald Hutchins

Mehmet Parlar

Michael D Parris

William Troy Huey

Keith Ingram Dismuke

Mathew M Samuel

Paul R Howard

Alejandro Pena

Gregory Kubala

Golchehreh Salamat

John Lassek

Marieliz Garcia-Lopez De Victoria

Yenny Christanti

Sylvie Daniel

Mark Brady

Colin J Price-Smith

Oscar Bustos

Zhijun Xiao

Andrey Yakovlev

Rene Schuurman

Giselle Refunjol

Elizabeth W Morris

Alex Ahrenst

Alexander Shapovalov

Mei Ho

Brad Holms

John Engels

Nihat Gurmen

Zakir Azmi

Donald Hodgson, Iii

Jesse C Lee

A method for forming rod-shaped particles includes reducing a length of rods derived from a slurry made up of particles and a reactant, wherein the rods are in a stabilized state in which the reactant has been at least partially reacted with a coagulant, but the rods have not been sintered, and subsequently sintering the reduced length stabilized rods. The reducing the length of the stabilized rods includes subjecting the stabilized rods to mechanical vibration applied by a device, or feeding the stabilized rods through a device having a rotating cutting mechanism.

Method of making rod-shaped particles for use as proppant and anti-flowback additive

Methods herein may include injecting a cement slurry having an aqueous base fluid, a cement, and a plurality of cellulose nanofibers dispersed in the aqueous base fluid. The plurality of cellulose nanofibers may be present in the slurry in an amount effective to provide a slurry density of not higher than 15 lb/gal.

Cellulose nanofibers in extended cement systems

A method for forming a perforated membrane includes providing a mold having at least a first set of a plurality of rods extending to at least a first height from a base of the mold, introducing a curable material into the mold in an amount such that a height of the curable material from the base of the mold is less than or equal to the first height so that the first set of the plurality of rods are within the curable material and extend to or past the height of the curable material in the mold, curing the curable material, dissolving the first set of the plurality of rods to thereby form perforations in the cured material and removing the cured material having the perforations from the mold.

Perforated membranes and methods of making the same

A method for forming spheroidal particles including inducing flow of a slurry of particles and a reactant through one or more orifices, detaching an amount of the slurry from the slurry flow following exit from the one or more orifices, the detached amount forming a slurry body, forming the slurry body into a spheroidal shape, contacting the spheroidally shaped slurry body with a coagulation solution to form a stabilized spheroidal particle and drying and/or sintering the stabilized spheroidal particle.

Method of making spheroidal particles

A method for forming particles having a ridge portion includes inducing flow of a slurry of particles and a reactant through one or more orifices, detaching an amount of the slurry from the slurry flow following exit from the one or more orifices, the detached amount forming a slurry body, forming the slurry body into a particle shape, contacting the particle shaped slurry body with a coagulation solution to form a stabilized particle having the ridge portion, and drying and/or sintering the particle having the ridge portion.

Method of making particles having a ridge portion for use as proppant

A method for forming rod-shaped particles includes inducing flow of a slurry of particles and a reactant through one or more orifices and into a coagulation solution, wherein the slurry exiting the one or more orifices is a continuous uninterrupted stream, coagulating the reactant in the coagulation solution to form stabilized rods, drying the stabilized rods and reducing a length of the dried stabilized rods.

The current application discloses compositions and methods for reducing fluid loss during subterranean operations. COactivated swellable elastomers can be used in subterranean operations to reduce fluid loss. In particular, the current application discloses compositions and methods for reducing lost circulation during drilling and drilling related subterranean operations.

Compositions and methods for reducing fluid loss

The current application discloses compositions and methods for treating a subterranean formation. CO2 swellable elastomers can be used in a treatment fluid to at least partially block a high permeability region, therefore improving the performance of an operation such as matrix stimulation, acidizing, and acid fracturing.

Swellable elastomer and its use in acidizing or matrix stimulation

The invention provides an oilfield suspending friction reducer treatment composition fluid comprising from about 0.001 weight percent to about 0.5 weight percent of a drag reducing surfactant; at least one drag reducing enhancer selected from the group consisting of polymeric drag reduction enhancers, monomeric drag reduction enhancers, and mixtures thereof.

Friction reduction fluids

Methods for treating wellbores using fluids containing a sphingan heteropolysaccharide which contributes viscosity stability and a decrease in friction pressure. Some methods are clean-out operations using recyclable-viscosity fluids containing at least a sphingan heteropolysaccharide and an optional salt. Others include methods of pumping fluids incorporating sphingan heteropolysaccharides to reduce pumping frictional pressure.

Methods of treating wellbores with recyclable fluids

A method of treatment of subterranean formations in which leakoff through natural fractures is controlled through the use of fibers. The method involves pumping a mixture of a formation treatment fluid and a fiber into the formation for matrix stimulation, fracture stimulation, diversion, and/or water control. In carbonate formations, the formation treatment fluid is preferably an in situ gelled acid. The method optionally also involves pumping the same or a different formation treatment fluid without fiber.

Methods for controlling fluid loss

A method is described for treating a subterranean formation with a low viscosity fluid system that contains a surfactant or mixture of surfactants that does not divert fluid flow in the formation, but that develops the ability to divert flow as the fluid flows through the formation. The fluid optionally contains a formation-dissolving agent. The fluid is used in matrix acidizing, acid fracturing, and diversion.

Self diverting matrix acid

Methods and compositions are disclosed for controlled addition of components that decrease the viscosity of the viscoelastic surfactant fluids or for controlled changes in the electrolyte concentration or composition of the viscoelastic surfactant fluids. One aspect of the invention relates to the use of internal breakers with a delayed activation. Another aspect of the invention relates to the use of precursors that release a breaking system such as alcohol by a process such as melting, slow dissolution, reaction with a compound present in the fluid or added to the fluid during or after the step of injecting, rupture of an encapsulating coating and de-adsorption of a breaking agent absorbed into solid particles. In another aspect of the invention, alcohols are included in a pad to reduce the low-shear viscosity and reduce the resistance to flow of the treatment fluids during a desired phase of the treatment.

Viscosity reduction of viscoelastic surfactant based fluids

Present invention relates to high brine carrier fluid, said carrier fluid selected from the group consisting of organic acids, organic acid salts, inorganic salts and combination of one or more organic acids or organic acid salts, a co-surfactant and an amount of a zwitterionic surfactant. The invention also relates to methods of treating a subterranean wellbore, including drilling, hydraulic fracturing, gravel placement, scale removing, mud cake removing, using said high brine carrier fluid.

Viscoelastic surfactant fluids stable at high brine concentrations

Growing community of inventors

Houston, TX, United States of America

Bernhard Lungwitz