Aria Abubakar

7565244, Jul 21, 2009

Jun 27, 2007

11/768975

David Alumbaugh - Berkeley CA, US
Ping Zhang - Albany CA, US
Edward Nichols - Berkeley CA, US
Frank Morrison - Berkeley CA, US
Aria Abubakar - North Reading MA, US
Tarek Habashy - Burlington MA, US

Schlumberger Technology Corporation - Sugar Land TX

G01V 1/40

702 6, 702 7, 702 11, 324323, 324334, 324339, 367 29, 367 49

Characterizing a reservoir with electromagnetic imaging surveys includes normalizing measured voltage data by transmitter moment, sorting the normalized voltage data into common receiver profiles, densely resampling transmitter locations using common positions for the receiver profiles, coarsely resampling the data at discreet transmitter locations, defining a starting model for inversion, weighting the data by a factor, converting the normalized voltage data to ratios, calculating a conductivity image using a ratio inversion method, and verifying that an inversion has converged and the image is geologically reasonable. The image can then be displayed. The invention can be used for cross-well, surface-to-borehole, and borehole-to-surface measurements by which the effects of steel casing are reduced.

7640110, Dec 29, 2009

Apr 27, 2007

11/741234

Aria Abubakar - North Reading MA, US
Tarek M. Habashy - Burlington MA, US
Vladimir Druskin - Brookline MA, US
David Lee Alumbaugh - Berkeley CA, US

Schlumberger Technology Corporation - Cambridge MA

G01V 3/38
G01V 3/08

702 2, 702 6, 702 7, 702 11, 702 13, 367 75, 324323, 324324, 324325, 324326, 324327, 324328, 324329, 324330, 324331, 324332, 324333, 324334, 324365, 324366, 324375

A method of determining the nature of a submarine or subterranean reservoir having an electromagnetic characteristic is described. The method comprises analyzing data associated with the application of a time varying electromagnetic field from above the reservoir using a data analysis methodology that does not utilize an estimate of the reservoir's geometry in determining one or more characteristics of the reservoir.

7756642, Jul 13, 2010

Jun 27, 2007

11/769031

Aria Abubakar - North Reading MA, US
Tarek Habashy - Burlington MA, US
David Alumbaugh - Berkeley CA, US
Ping Zhang - Albany CA, US
Guozhong Gao - Albany CA, US
Jianguo Liu - Quincy MA, US

Schlumberger Technology Corporation - Sugar Land TX

G01V 3/18

702 7, 702104

To characterize an earth subterranean structure using a measurement assembly including electromagnetic (EM) receivers and one or more EM sources, measured voltage data collected by EM receivers in response to transmission by one or more EM sources is received. Based on a model, predicted EM data is computed. Inversion is iteratively performed according to a function that computes a difference between the measured voltage data and a product of a term containing the predicted EM data and a term containing distortion data that accounts at least for distortion effect by an environment of the measurement assembly. The inversion is iteratively performed to solve for parameters of the model and the distortion data.

7991553, Aug 2, 2011

Jun 19, 2008

12/142408

David Alumbaugh - Berkeley CA, US
Ping Zhang - Albany CA, US
Edward Nichols - Berkeley CA, US
Frank Morrison - Berkeley CA, US
Aria Abubakar - North Reading MA, US
Tarek Habashy - Burlington MA, US

Schlumberger Technology Corporation - Sugar Land TX

G01V 1/40

702 6, 702 7, 702 11, 324323, 324334, 324339, 367 29, 367 49

Characterizing a reservoir with electromagnetic imaging surveys includes normalizing measured voltage data by transmitter moment, sorting the normalized voltage data into common receiver profiles, densely resampling transmitter locations using common positions for the receiver profiles, coarsely resampling the data at discreet transmitter locations, defining a starting model for inversion, weighting the data by a factor, converting the normalized voltage data to ratios, calculating a conductivity image using a ratio inversion method, and verifying that an inversion has converged and the image is geologically reasonable. The image can then be displayed. The invention can be used for cross-well, surface-to-borehole, borehole-to-surface, and single-well (borehole-to-borehole) measurements measurements by which the effects of steel casing are reduced.

8249812, Aug 21, 2012

Jun 19, 2008

12/142216

Aria Abubakar - North Reading MA, US
Tarek Habashy - Burlington MA, US
David Alumbaugh - Berkeley CA, US
Ping Zhang - Albany CA, US
Guozhong Gao - Albany CA, US
Jianguo Liu - Durham NC, US

Schlumberger Technology Corporation - Sugar Land TX

G01V 3/40
G01V 3/18
G01V 5/04
G01V 9/00

702 7, 702 6, 702 9, 702 11, 324345

To characterize an earth subterranean structure using a measurement assembly including electromagnetic (EM) receivers and one or more EM sources, measured voltage data collected by EM receivers in response to transmission by one or more EM sources is received. Based on a model, predicted EM data is computed. Inversion is iteratively performed according to a function that computes a difference between the measured voltage data and a product of a term containing the predicted EM data and a term containing distortion data that accounts at least for distortion effect by an environment of the measurement assembly. The inversion is iteratively performed to solve for parameters of the model and the distortion data.

20080103700, May 1, 2008

Oct 31, 2006

11/554857

Peter M. van den Berg - Pinjacker, NL
Aria Abubakar - Danbury CT, US
Tarek Habashy - Danbury CT, US

Schlumberger Technology Corporation - Sugar Land TX

G06F 19/00
G06F 17/40
G06F 17/10

702 6, 702 1, 702 2, 702127, 702187, 702189

To perform surveying of a subterranean structure, electromagnetic (EM) wavefields traveling in opposite directions are determined. A relationship is defined among the EM wavefields, where the EM wavefields include a first set of EM wavefields in a first state in which a sea surface is present, and a second set of EM wavefields in a second, different state in which the sea surface is not present. At least one EM wavefield in the relationship is determined to perform removal of sea surface-related effects.

20090164187, Jun 25, 2009

Dec 21, 2007

12/004792

Tarek Habashy - Burlington MA, US
Aria Abubakar - North Reading MA, US
Jeff Spath - Missouri City TX, US
Raj Banerjee - Abingdon, GB

G06G 7/50

703 10

A method is disclosed for building a predictive or forward model adapted for predicting the future evolution of a reservoir, comprising: integrating together a plurality of measurements thereby generating an integrated set of deep reading measurements, the integrated set of deep reading measurements being sufficiently deep to be able to probe the reservoir and being self-sufficient in order to enable the building of a reservoir model and its associated parameters; generating a reservoir model and associated parameters in response to the set of deep reading measurements; and receiving, by a reservoir simulator, the reservoir model and, responsive thereto, generating, by the reservoir simulator, the predictive or forward model.

20100185393, Jul 22, 2010

Oct 28, 2009

12/607708

Lin Liang - Cambridge MA, US
Aria Abubakar - North Reading MA, US
Tarek Habashy - Burlington MA, US
Michael Thambynayagam - Sugar Land TX, US

Schlumberger Technology Corporation - Cambridge MA

G01V 3/38
G01V 3/30

702 7, 702 12

Methods and related systems are described relating to an inversion approach for interpreting the geophysical electromagnetic data. The inversion can be constrained by using a multiphase fluid flow simulator (incorporating pressure data if available) which simulates the fluid flow process and calculates the spatial distribution of the water saturation and the salt concentration, which are in turn transformed into the formation conductivity using a resistivity-saturation formula. In this way, the inverted invasion profile is consistent with the fluid flow physics and moreover accounts for gravity segregation effects. Jointly with the pressure data, the inversion estimates a parametric one-dimensional distribution of permeability and porosity. The fluid flow volume is directly inverted from the fluid-flow-constrained inversion of the electromagnetic data. The approach is not limited by the traditional interpretation of the formation test, which is based on a single-phase model without taking into account invasion or assuming that the fluid, for example mud-filtrate, has been cleaned up from the formation testing zone. The joint inversion of the electromagnetic and pressure data provides for a more reliable interpretation of formation permeability. One advantage of the approaches described herein, is its possible generalization to three-dimensional geometries, for example dipping beds and highly deviated wells.