William J Corea

US Patent:

7620498, Nov 17, 2009

Filed:

Aug 23, 2007

Appl. No.:

11/844193

Inventors:

William Stephen Kowalik - San Ramon CA, US
William Charles Corea - San Ramon CA, US
William Harrison Crane - Houston TX, US
William John Schweller - Walnut Creek CA, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

G06F 19/00

US Classification:

702 8, 324323

Abstract:

A method of analyzing characteristics of a subterranean formation includes transmitting a signal at least partially into a material of the subterranean formation such that the signal is transformed in a manner indicative of a characteristic of the material, receiving the transformed signal from the material, converting the transformed signal into image data indicative of the characteristic of the material, applying a first set of machine executable rules to the image data to produce segmented image data, wherein portions of the image that are sufficiently related according to the applied rules are grouped into segments, and analyzing, according to a second set of machine executable rules, the segmented image data to produce a geological profile of the subterranean formation.

US Patent:

8126647, Feb 28, 2012

Filed:

Apr 7, 2008

Appl. No.:

12/098533

Inventors:

Marina M. Hruska - San Ramon CA, US
William C. Corea - San Ramon CA, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

G01V 3/38
G06F 19/00

US Classification:

702 7

Abstract:

A method of analyzing characteristics of a subterranean formation includes applying a wavelet transform to measured data or to derived data obtained from the measured data, the measured data obtained by measuring a physical property at each of a plurality of positions in a borehole that penetrates the subterranean formation; selecting one or more scales for analyzing wavelet coefficients; performing a segmentation of the data; calculating a distribution of wavelet coefficients for each scale, for one or more spatial directions of wavelet transform application, for the wavelet transform of the data and for each segment that belongs to the portion on which the wavelet transform has been calculated; and for each segment, analyzing a distribution of the data and the distribution of the wavelet coefficients for each scale in terms of their overlap with corresponding distributions of training samples to produce a geological interpretation of the subterranean formation.

US Patent:

7363158, Apr 22, 2008

Filed:

Apr 7, 2006

Appl. No.:

11/399969

Inventors:

Charles E. Stelting - Missouri TX, US
William J. Schweller - Walnut Creek CA, US
William C. Corea - San Ramon CA, US
William H. Crane - San Ramon CA, US
Lisa R. Goggin - Sugar Land TX, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

G01V 1/04
G01N 15/08

US Classification:

702 6, 702 12

Abstract:

A method for creating a stratigraphic model is provided. A core is obtained from a wellbore and a detailed graphic core description is created. Wireline data, including a borehole image, is obtained for a cored interval corresponding to the core and processed into an interpretable borehole image. The core description is compared with the interpretable borehole image to create a catalogue of geologic image facies. The borehole image from the entire interval of interest is compared to the catalogue to create a preliminary pseudocore description. The interpretable borehole image is interactively examined and compared with the preliminary pseudocore description to create a master pseudocore interpretation. A second master pseudocore is developed for a second wellbore. A stratigraphic model, and subsequently a reservoir model, may then be created by correlating between the master pseudocores of the first and second wellbores.