Schlumberger Technology Corporation

Bernhard Rudolf Lungwitz

Mohan Kanaka Raju Panga

Chad Kraemer

Maxim Pavlovich Yutkin

Sergey Sergeevich Skiba

Diankui Fu

Bruno Lecerf

Jiangshui Huang

Dmitriy Ivanovich Potapenko

Marina Nikolaevna Bulova

John Daniels

Olga Petrovna Alekseenko

Jose Alberto Ortega Andrade

Fedor Nikolaevich Litvinets

Alexey Alexandrovich Sova

Denis Viktorovich Bannikov

Alexey Vladimirovich Alekseev

Fatma Daou

Kira Vladimirovna Yudina

Ksenia Mikhailovna Kaprielova

Konstantin Viktorovich Vidma

Olga Alexandrovna Minikh

Sergey Vladimirovich Semenov

Svetlana Viktorovna Nesterova

Geza Horvath Szabo

Andrey Vladimirovich Yakovlev

A method of stimulating the inflow of oil and/or gas from the wellbore, in particular, a hydraulic fracturing method, is disclosed. The method of hydraulic fracturing comprises the stages: injecting a slug of a proppant-free fluid through the well into a formation for hydraulic fracture creation and propagation; injecting a slug of proppant-laden slurry into the formation to create a proppant pack in the hydraulic fracture; injecting a slug of slurry that contains a fluid and the polyelectrolyte complex-based proppant aggregates to create permeable channels in the near-wellbore area of the hydraulic fracture; injecting a slug of a displacement fluid into the well. This sequence of operations allows avoiding the proppant slurry overdisplacement deep into the hydraulic fracture, maintaining high fracture conductivity, and increasing the well productivity.

Method for hydraulic fracturing (variants)

Methods of treating a subterranean formation penetrated by a well bore, by providing a treatment fluid comprising a blend including a first amount of particulates having a first average particle size between about 3 mm and 2 cm and a second amount of particulates having a second average size between about 1.6 and 20 times smaller than the first average particle size or a second amount of flakes having a second average size up to 10 times smaller than the first average particle size; by introducing the treatment fluid into the well bore; and by creating a plug with the treatment fluid.

Methods of zonal isolation and treatment diversion

This method is designed to facilitate the well treatment with the possibilities for non-uniform/heterogeneous proppant placement in the extended and branched fractures produced by hydraulic fracturing. The essence of the method is to inject a proppant-bearing gel into the wellbore drilled into a productive formation. The low-viscosity fracturing fluid is injected into the wellbore together with the gel fluid (simultaneously or in turns). The method also provides for the injection of gas into the proppant-bearing gel and/or the low-viscosity fluid. The gas can be injected upstream of the junction point, at the junction point, or downstream of the junction point of the flows of the proppant-bearing gel and the low-viscosity fluid. The method further provides for the division of the gel fluid into the separate agglomerates with their subsequent injection into the fractures in the subterranean formation to form the proppant structures in the fracture.

Method of treating a well with the formation of proppant structures (variants)

Adding shapeable particles to drilling fluids may be useful for curing lost circulation. When the shapeable particles are pumped downhole through the drillpipe and the drillbit, they may deform when exposed to shear as they pass through the drillbit nozzles. While circulating back toward the surface they may relax at least partially and assume the shape of cracks or voids they encounter along the formation wall, thereby stopping losses.

Compositons and methods for curing lost circulation

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Wuerzburg, Germany

Bernhard Rudolf Lungwitz