Denise Elaine Freed

US Patent:

6597171, Jul 22, 2003

Filed:

Jul 20, 2001

Appl. No.:

09/909665

Inventors:

Martin D. Hurlimann - Ridgefield CT
Olivier J. Terneaud - Saint Avertin, FR
Denise Freed - Mount Kisco NY
Ulrich Scheven - Bethel CT
Lalitha Venkataramanan - Stamford CT

Assignee:

Schlumberger Technology Corporation - Ridgefield CT

International Classification:

G01V 300

US Classification:

324303, 324300

Abstract:

Nuclear magnetic resonance methods for extracting information about a fluid in a rock are described. A system of nuclear spins in the fluid are prepared in a driven equilibrium, and a series of magnetic resonance signals generated from the fluid. The series of magnetic resonance signals is detected and analyzed to extract information about the fluid in the rock.

US Patent:

7718434, May 18, 2010

Filed:

Jun 9, 2004

Appl. No.:

10/864124

Inventors:

Denise Freed - Mount Kisco NY, US

Assignee:

Schlumberger Technology Corporation - Ridgefield CT

International Classification:

G01N 33/24

US Classification:

436 29, 436 26, 436 30, 436173

Abstract:

The diffusion coefficients and relaxation times of mixtures of alkanes follow simple scaling laws based on the chain length of the constituents and the mean chain length of the mixture. These scaling laws are used to determine chain sizes in a mixture from the distribution of the diffusion coefficients. These scaling laws can be used to determine the mean chain lengths (or chain lengths) of a sample (alkanes or mixtures of alkanes) and therefore the constituents of the sample.

US Patent:

8587302, Nov 19, 2013

Filed:

Mar 4, 2010

Appl. No.:

12/717512

Inventors:

Lalitha Venkataramanan - Lexington MA, US
Tarek M. Habashy - Burlington MA, US
Denise Freed - Newton Highlands MA, US
Ashok Belani - Paris, FR

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G01V 3/00
G01V 1/48

US Classification:

324303, 702 8, 702 9, 702 12, 324300

Abstract:

Methods and related systems are described for estimating fluid or rock properties from NMR measurements. A modified pulse sequence is provided that can directly provide moments of relaxation-time or diffusion distributions. This pulse sequence can be adapted to the desired moment of relaxation-time or diffusion coefficient. The data from this pulse sequence provides direct estimates of fluid properties such as average chain length and viscosity of a hydrocarbon. In comparison to the uniformly-spaced pulse sequence, these pulse sequences are faster and have a lower error bar in computing the fluid properties.

US Patent:

8206993, Jun 26, 2012

Filed:

Mar 29, 2010

Appl. No.:

12/749216

Inventors:

Denise Freed - Newton Highlands MA, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G01N 24/00

US Classification:

436173, 436 28, 436 29, 436 85

Abstract:

The diffusion coefficients and relaxation times of mixtures of alkanes follow simple scaling laws based on the chain length of the constituents and the mean chain length of the mixture. These scaling laws are used to determine chain sizes in a mixture from the distribution of the diffusion coefficients. These scaling laws can be used to determine the mean chain lengths (or chain lengths) of a sample (alkanes or mixtures of alkanes) and therefore the constituents of the sample.

US Patent:

20030085702, May 8, 2003

Filed:

Nov 6, 2001

Appl. No.:

09/992815

Inventors:

Denise Freed - Mount Kisco NY, US
Martin Hurlimann - Ridgefield CT, US
Ulrich Scheven - Bethel CT, US

Assignee:

SCLUMBERGER TECHNOLOGY CORPORATION - Ridgefield CT

International Classification:

G01V003/00

US Classification:

324/303000

Abstract:

Nuclear magnetic resonance logging methods that detect and analyze a steady state free precession (SSFP) signal are described. In some embodiments, Carr-Purcell-Meiboom-Gill (CPMG) spin echoes are detected along with the SSFP signals. From the SSFP signal, either alone or in combination with CPMG signals, information about a region of an earth formation, such as porosity, bound fluid volume and diffusion, may be extracted.

US Patent:

20090312997, Dec 17, 2009

Filed:

Jun 12, 2009

Appl. No.:

12/483813

Inventors:

Denise E. Freed - Newton Highlands MA, US
Kentaro Indo - Edmonton, CA
Oliver C. Mullins - Ridgefield CT, US
John Ratulowski - Edmonton, CA
Julian Zuo - Edmonton, CA

Assignee:

Schlumberger Technology Corporation - Cambridge MA

International Classification:

G06G 7/57
G06F 17/10

US Classification:

703 10, 703 2

Abstract:

Methods and systems to characterize a fluid in a reservoir to determine if the fluid is in one of equilibrium or non-equilibrium in terms of one of gravity, solvency power, entropy effect or some combination thereof. The method includes acquiring tool data at each depth for each fluid sample of at least two fluid samples wherein each fluid sample is at a different depth and communicating the tool data to a processor. Determining formation properties of each fluid sample to obtain formation property data and determining fluid properties for each fluid sample to obtain fluid property data. Selecting a mathematical model based on one of gravity, solvency power or entropy, in view of a fluid property, using one of tool data, formation property data, fluid property data, known fluid reservoir data or some combination thereof, to predict if the fluid is in an equilibrium distribution or a non-equilibrium distribution.

US Patent:

20110175607, Jul 21, 2011

Filed:

Jun 29, 2009

Appl. No.:

13/002415

Inventors:

Edmund Fordham - Suffolk, GB
Denise Freed - Newton Highlands MA, US
Yuesheng Cheng - Edmonton, CA
John Edwards - Sultanate of Oman, OM

Assignee:

Schlumberger Technology Corporation - Cambridge MA

International Classification:

G01V 3/32

US Classification:

324303

Abstract:

NMR logging in a wellbore is used to monitor an oil reservoir during oil recovery by miscible displacement. Diffusivity distributions found by NMR logging indicate whether one or two phases are present and composition of residual oil. Operation of the oil recovery procedure may be maintained or modified in response to monitoring of the reservoir.

US Patent:

20120232799, Sep 13, 2012

Filed:

Aug 10, 2010

Appl. No.:

13/394437

Inventors:

Youxiang Zuo - Edmonton, CA
Denise E. Freed - Newton Highlands MA, US
Oliver Clinton Mullins - Ridgefield CT, US
Christopher Harrison - Auburndale MA, US

International Classification:

G01V 8/00
G06F 19/00
E21B 49/08

US Classification:

702 6, 7315228, 250255

Abstract:

A methodology that performs downhole fluid analysis of fluid properties of a reservoir and characterizes the reservoir based upon such downhole fluid analysis. The methodology acquires at least one fluid sample at a respective measurement station and performs downhole fluid analysis to measure properties of the fluid sample, including concentration of a plurality of high molecular weight components. For each of a plurality of type classes corresponding to different subsets of a predetermined set of high molecular weight components, a model is used to predict the concentration of the components of the given type class for the plurality of measurement stations. The predicted concentrations of the high molecular weight components for the plurality of type classes are then compared with corresponding concentrations measured by downhole fluid analysis for the plurality of measurement stations to identify the best matching type class. The results of the comparison are used for reservoir analysis,