Edward Jason Nichols

US Patent:

7795872, Sep 14, 2010

Filed:

Oct 5, 2007

Appl. No.:

11/868379

Inventors:

Brian Clark - Sugar Land TX, US
Frank Morrison - Berkeley CA, US
Edward Nichols - Berkeley CA, US
Hong Zhang - El Sobrante CA, US
Richard A. Rosthal - Richmond CA, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G01V 3/18
G01V 3/00

US Classification:

324338, 324337

Abstract:

To determine effect on a magnetic field caused by a lining structure in a wellbore, an array may be deployed into the wellbore lined with the lining structure. The array comprises a plurality of sensors including sensor A configured to operate as a transmitter, sensor B configured to operate as either a transmitter or a receiver, and sensor C configured to operate as a receiver. The array measures magnetic fields using sensor B as a receiver and sensor C in response to activation of sensor B as a transmitter and sensor A. A plurality of lining structure correction factors can be calculated based on the measured magnetic fields, based on the reciprocity of the sensors.

US Patent:

7822553, Oct 26, 2010

Filed:

Jun 29, 2007

Appl. No.:

11/770902

Inventors:

Christian Besson - Le Pecq, FR
Kamal Babour - Bures sur Yvette, FR
Kambiz A. Safinya - Houston TX, US
Edward Nichols - Berkeley CA, US

Assignee:

WesternGeco L.L.C. - Houston TX

International Classification:

G01V 3/00

US Classification:

702 2

Abstract:

A method for determining formation electrical properties includes deploying one or more receivers for electromagnetic logging; obtaining measurement data indicative of the formation electrical properties using the deployed receivers; correcting the measurement data for receiver imperfection; and inverting the corrected measurement data to obtain one or more parameters of formation electrical properties.

US Patent:

7825664, Nov 2, 2010

Filed:

Dec 19, 2006

Appl. No.:

11/612881

Inventors:

Dean Homan - Sugar Land TX, US
Edward Nichols - Berkeley CA, US
Michael Wilt - Walnut Creek CA, US
Jean Seydoux - Sugar Land TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G01V 3/18
G01V 3/30

US Classification:

324334, 324339, 324343

Abstract:

A wireline tool string used in a wellbore to determine formation properties is disclosed which comprises one or more transmitter tools disposed within the tool string, each transmitter tool having three linearly independent coils; a receiver tool disposed within the tool string, wherein the receiver tool has three linearly independent coils; and a tool string component disposed between the one or mole transmitter tools and the receiver tool; wherein the one or more transmitter tools are selectably spatially separated from the receiver tool along the tool string to provide a desired depth of investigation and measurements made using the one or more transmitter tools and receiver tool are used to determine formation properties.

US Patent:

20090001986, Jan 1, 2009

Filed:

Jun 29, 2007

Appl. No.:

11/771598

Inventors:

Christian Besson - Le Pecq, FR
Kamal Babour - BURES SUR YVETTE, FR
Kambiz A. Safinya - Houston TX, US
Edward Nichols - Berkeley CA, US

Assignee:

SCHLUMBERGER TECHNOLOGY CORPORATION - Sugar Land TX

International Classification:

G01V 3/08

US Classification:

324335, 324334

Abstract:

An electromagnetic receiver includes at least one sensor for measuring electromagnetic signals, and a calibration antenna configured to generate an electromagnetic signal at a first frequency.

US Patent:

20100308832, Dec 9, 2010

Filed:

Apr 12, 2010

Appl. No.:

12/758556

Inventors:

Brian Clark - Sugar Land TX, US
Frank Morrison - Berkeley CA, US
Edward Nichols - Berkeley CA, US
Hong Zhang - El Sobrante CA, US
Richard A. Rosthal - Richmond CA, US

International Classification:

G01V 3/18

US Classification:

324338

Abstract:

To determine effect on a magnetic field caused by a lining structure in a wellbore, an array may be deployed into the wellbore lined with the lining structure. The array comprises a plurality of sensors including sensor A configured to operate as a transmitter, sensor B configured to operate as either a transmitter or a receiver, and sensor C configured to operate as a receiver. The array measures magnetic fields using sensor B as a receiver and sensor C in response to activation of sensor B as a transmitter and sensor A. A plurality of lining structure correction factors can be calculated based on the measured magnetic fields, based on the reciprocity of the sensors.

US Patent:

20110315378, Dec 29, 2011

Filed:

May 25, 2011

Appl. No.:

13/115407

Inventors:

DEAN M. HOMAN - Sugar Land TX, US
Edward Nichols - Berkeley CA, US

International Classification:

E21B 47/00
E21B 31/06
E21B 17/00

US Classification:

1662542, 1662421, 166 665

Abstract:

A casing string in a wellbore has conductive tubulars and modified conductivity (MC) or non-conductive tubulars joined to one another. A MC/non-conductive tubular may be disposed between two conductive tubulars. If there are at least two MC/non-conductive tubulars and at least three conductive tubulars, two of the MC/non-conductive tubulars may be alternately disposed between three of the conductive tubulars. The MC/non-conductive tubulars may be formed from materials such as stainless steel, fiber-reinforced thermal sets, and thermal plastics. One such thermal plastic is polyetheretherketone (PEEK) and it may be glass-reinforced. The conductive tubulars, if electrically isolated, may be used as electrodes to transmit or receive electromagnetic signals. The casing string may used for borehole to surface applications, surface to borehole applications, borehole to borehole applications, or single well applications. The casing string may also have downhole sensors, uphole sensors, and surface sensors. Those sensors may be transmitters or receivers.