Schlumberger Technology Corporation

Schlumberger Canada Limited

Services Petroliers Schlumberger

Schlumberger Holdings Limited

Prad Research and Development Limited

James G Filas

Lang Zhan

Dhandayuthapani Kannan

Fikri John Kuchuk

Gary L Rytlewski

Laurent Alteirac

Christian C Spring

Erwann Lemenager

Gaelle Jannin

Stephane Hiron

Malcolm Atkinson

Matthe Contant

Anthony J Fitzpatrick

Edgar Jose Montiel

Pierre F Le Foll

Christopher Sarvari

Alexander Starostin

Bertrand Theuveny

Pavel Evgenievich Spesivtsev

Graham Birkett

David E Sask

Susanna Fragoso

Colin Arthur Longfield

Malcolm Philip Atkinson

John Stevens

Adeel Khan

An apparatus for performing a well test operation includes a tubular member having a surge chamber and a valve that can control fluid flow from a well into the surge chamber during the well test operation. The apparatus can also include a flow control device, in addition to the valve, for further controlling fluid flow into the surge chamber from the well. Flow rate and pressure data can be measured during the well test operation and used to estimate reservoir properties. Various other systems, devices, and methods are also disclosed.

Closed chamber impulse test with downhole flow rate measurement

A technique facilitates mechanical operation of components, e.g. valves, without utilizing electronics at the components or control lines routed to the components. An actuation control system is fully mechanical in the sense that it is constructed to mechanically shift to different control positions via pressure input, such as pressure input supplied along a wellbore annulus. The actuation control system utilizes a spool valve coupled with a pilot control circuit which establishes a reference pressure that can be used in shifting the spool valve to different operational positions.

Actuation control system using pilot control circuit

A system and method for transmitting data from within a wellbore to a surface location includes downhole tool that is nm into the wellbore. The downhole tool includes a sensor, a processor, and a transmitter. A pressure response in the wellbore is measured with the sensor. A function that approximates the pressure response is determined. The function is transmitted to the surface location with the transmitter.

Wirelessly transmitting data representing downhole operation

A data retrieval device for communicating between a downhole location within a wellbore () and a surface location () in which a downhole to surface telemetry system is installed and adapted to communicate between a first telemetry module and a second telemetry module with the second telemetry module () positioned downhole and connected to a string () positioned within the wellbore (). The data retrieval device is provided with a housing adapted to be positioned inside the string; a communication device supported by the housing; a connection port positioned on the housing and adapted to be connected to a line; and an electronic module supported by the housing. The electronic module is in communication with the communication device and is adapted to store and use at least an identification parameter of the first telemetry module to intercept a signal transmission addressed to the first telemetry module from the second telemetry module () via the communication device.

Data retrieval device for downhole to surface telemetry systems

A method for capturing a sample from a wellbore, comprising the steps of introducing a first message and a second message into a tubing positioned within the wellbore. The first message is directed to a first modem connected to a first sampler device to cause the first sampler device to collect a first sample. The second message is directed to a second modem connected to a second sampler device to cause the second sampler device to collect a second sample.

Accoustic triggering devices for multiple fluid samplers and methods of making and using same

A multizone testing system (), for the testing of subterranean layers, comprises an upper subsystem () comprising a control station (), a main isolation packer () for isolating the upper subsystem () from the lower subsystem (), a lower subsystem () comprising an array of individual apparatuses () connected in series, each apparatus () being adapted for the testing of one layer and comprising a series of remotely activated tools for hydraulically isolating and testing the corresponding layer and a communication system comprises communication means between the control station () and the surface and between the control station () and each of the individual apparatuses () in order to control the remotely activated tools of the individual apparatuses for sequential testing of the layers. A multizone testing method for the testing of a plurality of subterranean layers intersected by a well, using a multizone testing system () comprises the steps of running and positioning said system () into the well such that each individual apparatus () is adjacent to a layer to be tested and controlling the remotely activated tools of the individual apparatuses for a sequential test of the layers.

Downhole, single trip, multi-zone testing system and downhole testing method using such

Based on measurements that are obtained from a well test, a pressure in the well is modeled as a function of at least a skin effect factor that varies with time. The results of the modeling may be used to estimate at least one well parameter, such as a formation parameter and/or a well pressure, as examples.

Interpreting well test measurements

The invention relates to fluid sampling in a test that is used to determine physical and chemical characteristics of the fluids in a subterranean reservoir. The method reconstructs the entire pressure history of the fluid parcel that is captured in the fluid samplers during a test. Using this reconstructed pressure history of the samples, the quality of the samples, particularly, whether there is a phase change in the samples during the test, can be accurately quantified.

Method and apparatus to quantify fluid sample quality

For optimizing well production, intervals are selected along a deviated wellbore, and a well test and treatment string is deployed in the wellbore. Each interval is then isolated to enable performance of desired testing. The test data obtained is evaluated to determine an appropriate remedial action which is then implemented via the well test and treatment string. The system and method enable the testing and treatment of a plurality of intervals along a horizontal well during the same run downhole.

System and method for optimizing production in a well

A technique that is usable with a well includes communicating fluid from the well into a downhole chamber in connection with a well testing operation. The technique includes monitoring a downhole parameter that is responsive to the communication to determine when to close the chamber.

Technique and apparatus for use in well testing

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Missouri City, TX, United States of America

James G Filas