Schlumberger Technology Corporation

Bruce A MacKay

Douglas E Miller

Oliver Clinton Mullins

Philip F Sullivan

Ralph Michael D'Angelo

Gregory Kubala

Romain Charles Andre Prioul

Nicolas Droger

Ahmad Latifzai

Andreas Hausot

Canyun Wang

Alireza Farahani

Methods and related systems are described for measuring acoustic signals in a borehole during a fracturing operation. The system includes a downhole toolstring designed and adapted for deployment in a borehole formed within a subterranean rock formation. A downhole rock fracturing tool opens and propagates a fracture in the subterranean rock formation. Dipole and/or quadrupole acoustic sources transmit acoustic energy into the subterranean rock formation. A receiver array measures acoustic energy traveling through the subterranean rock formation before, during and after the fracture induction. Geophones mounted on extendable arms can be used to measure shear wave acoustic energy travelling in the rock formation. The toolstring can be constructed such that the sources and receivers straddle the fracture zone during the fracturing. Alternatively, the sources or the receivers can co-located axially with the fracture zone, or the toolstring can be repositioned following fracturing such that the fracture zone is between the acoustic sources and receivers.

Microhydraulic fracturing with downhole acoustic measurement

A method comprising providing a composition with at least one isocyanate including a blocking group able to be unblocked at or above a deblocking temperature, contacting the composition with an inactivated catalyst and at least one active hydrogen compound, exposing the composition to a trigger to activate the catalyst, creating an elastomeric gel composition, and exposing the composition to a temperature above the deblocking temperature with a second downhole tool, wherein the second downhole tool is able to generate microwaves is provided.

Method for treating well bore with polyurethane composition

The invention discloses a method of creating a polymerized composition in a well bore: providing a polymerizable composition made of a polymerization initiator and a monomer polymerizable by frontal polymerization; introducing the polymerizable composition into the wellbore; exposing the polymerizable composition to a trigger to activate the frontal polymerization; and creating the polymerized composition.

Method for treating well bore within a subterranean formation

A method of treating a shale-containing subterranean formation penetrated by a wellbore is accomplished by forming a carbon dioxide treatment fluid having a viscosity of less than about 10 mPa-s at a shear rate of about 100 s. The carbon dioxide treatment fluid is introduced into the formation through the wellbore at a pressure above the fracture pressure of the formation. In certain embodiments, the treatment fluid may be comprised of from about 90% to 100% by weight carbon dioxide and may contain a proppant. A method of treating hydrocarbon-bearing, shale-containing subterranean formation penetrated by a wellbore may also be carried out by forming a carbon dioxide treatment fluid and introducing the carbon dioxide treatment fluid into the formation through the wellbore at a pressure above the fracture pressure of the formation. The formation being treated may have a permeability of less than 1 mD.

Use of carbon-dioxide-based fracturing fluids

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Sugar Land, TX, United States of America

Bruce A MacKay