Schlumberger Technology Corporation

Schlumberger Canada Limited

Services Petroliers Schlumberger

Schlumberger Holdings Limited

Prad Research and Development Limited

Abbas Mahdi

Gary Gill

Yiyan Chen

Barton Sponchia

Timothy L Pope

Richard Marcinew

Craig Skeates

Stephen P Lemp

Trevor McLeod

Skeates Craig

Matt Graham

Bryan C Linn

John Kovacs

Gary E Gill

A method of treating a subterranean formation penetrated by a wellbore involves introducing an acid treatment fluid through the wellbore into the formation. The treatment fluid is formed from a zwitterionic viscoelastic surfactant, an acid in an amount to provide the treatment fluid with an initial pH of &#x2266;0 and a rheology enhancer. The treatment fluid has a high viscosity at the initial pH and a lower viscosity when the pH of the treatment fluid is raised to an intermediate pH of from greater than 0 to about 5.

Viscoelastic surfactant acid treatment

A method of determining when to stop pumping proppant during hydraulic fracturing in a wellbore is described. By accurately detecting tip screen-out with a bottom hole pressure gauge mounted to a perforating gun, the optimal amount of proppant can be supplied to a fracture while avoiding the risks associated with wellbore screen-out.

Live bottom hole pressure for perforation/fracturing operations

A stand-alone frac liner that allows for fracturing of multiple lateral legs of a multilateral well on a single call out and rig-up of fracturing equipment. Tools and techniques are provided that include setting multiple stand-alone frac liners in multiple lateral legs of the multilateral well. The liners may rest in the legs physically untethered to surface equipment. Thus, a single call out of a frac string tubular and associated equipment may be used to frac the lateral legs in sequence from one leg to the next. This may be achieved without the requirement of removal of the tubular from the well or disconnect of surface fracturing equipment between the lateral fracture applications. Thus, a considerable amount of expenses associated with time and manpower may be saved.

Structurally stand-alone FRAC liner system and method of use thereof

A method enables stimulation of a well having a plurality of lateral wellbores. The method comprises deploying fracturing equipment downhole for isolated interaction with each lateral wellbore of the plurality of lateral wellbores. The method and the fracturing equipment are designed to enable fracturing of the plurality of lateral wellbores during a single mobilization.

Method and apparatus for multilateral multistage stimulation of a well

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Calgary, Canada

Abbas Mahdi