Schlumberger Technology Corporation

Andrey Vladimirovich Fedorov

Diankui Fu

Olesya Levanyuk

Gary John Tustin

Bruno Lecerf

Xiaowei Weng

Alexander Nadeev

Artem Valeryevich Kabannik

Valerie Lafitte

Roman Vladimirovich Korkin

Eric Clum

Alexey Vladimirovich Alekseev

Shiyi Wang

Roman Korkin

Kira Vladimirovna Yudina

Dmitry Viktorovich Badazhkov

Vadim Kamilievich Khlestkin

Aleksandra Mikhailovna Khudorozhkova

Jared Bruns

Demid Valeryevich Demidov

Tatiana Zolnikova

Larisa Kochmar

Nikolay Borisovich Gorshkov

Methods for locating fluid interfaces in a cased wellbore include generating vibrations in the casing, thereby forming oscillations in the wellbore fluids and the casing. The oscillations are detected by a vibration detector. The oscillations are recorded by a data acquisition system. Mathematical processing of the oscillations by cepstrum analysis is performed to determine the depths of interfaces between fluids in the annulus. The methods may also be employed to determine the time at which a cement slurry begins to set and harden. The methods may be performed in real time.

Methods for determining positions of fluid interfaces and detecting cement setting in a subterranean wellbore

A method is offered to predict and prevent the event of fracture hit (direct fluid communication) between a parent well and a child (active) well. The growth of a child well creates 3D stress field in the vicinity of a parent well. The growth of a child well is simulated using the geomechanic-transport model. A model of interaction between the child well and parent well is provided. The simulations for different job designs create a set of pressure scenario in the parent both for the cases with and without fracture hit (fracture hit catalogue). Comparison (matching) of actual pressure data in the parent and child well with the pre-calculated pressure scenarios indicate the risk of fracture development with a fracture hit, which means a stop in fracturing stimulation.

Method of predicting and preventing an event of fracture hit

A method for fracturing a subterranean formation, the method comprising injecting a fracturing fluid into a wellbore through the subterranean formation, thereby creating a fracture network in the subterranean formation, the fracturing fluid comprising a proppant and a plurality of polymer fibers having a deflection temperature ranging from about 70&#xb0; C. to about 150&#xb0; C. dispersed in a carrier fluid.

Polymer fiber additive for proppant flowback prevention

A method for treating a subterranean formation penetrated by a wellbore is provided. The method includes providing a treatment fluid containing a viscoelastic surfactant having at least one degradable linkage, a hydrolysable material, and a pH control material, and injecting the treatment fluid into a subterranean formation. The pH control material may have a pH equal or greater than about 9 and may include a strongly alkaline material and an oxidizing agent.

Method for treating subterranean formation with degradable material

An embodiment of a downhole method of breaking of a well treatment fluid relates to overcrosslinking a polymeric thickener with an overcrosslinking agent such as an excess crosslinking agent and/or an excess alkaline material, wherein either or both the agent and/or material may be encapsulated.

Delayed breaking of well treatment fluids

Growing community of inventors

Kolsovo, Russia

Andrey Vladimirovich Fedorov