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The Wise Report Henry M. Wise, P.G. August 22, 2010 Lynn Clark, member of the Texas Board of Professional Geoscientists wrote to me a response to the previous Wise Report. He states: I attended the Legislative Committee also, and I offer my personal observations to augment Mr. Mikel's more

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HGS General Lunch

Wednesday 28-Jan-09 11:30 AM to 1:00 PM CST

We were unable to register you for this event as the event deadline has passed or the maximum number of seats available has been reached.

Total Seats: 120

Reserved: 111

Petroleum Club of Houston

800 Bell St., 43rd Floor
Houston Texas 77002 USA
Google Maps | Hotels Near | Yahoo! Maps | Weather Forecast
Phone: (713) 659-1431

Speaker David Paddock

Position: Reservoir Characterization Team Leader and Principal Geophysicist
Company: Schlumberger DCS Reservoir Seismic Services USA

Event Description

Seismic Reservoir Characterization of a Gas Shale Utilizing Azimuthal Data Processing, Pre-Stack Seismic Inversion and Ant Tracking

David Paddock*, Christian Stolte, Lei Zhang, Javaid Durrani
Schlumberger Data & Consulting Services, Houston

John Young
WesternGeco, Denver

Prospective hydrocarbon-bearing zones in the subject gas shale are characterized by gas entrapped in the sediment matrix with some additional open-fracture component. This gas is economically recovered by horizontal drilling and fracturing. We sho

w the results of an integrated workflow to get a good seismic image in the presence of anisotropy, find the sweet spots, and characterize fractures and reservoir risk.

Seismic azimuthal anisotropic analysis determines the dominant direction of the fast and slow seismic velocities indicative of maximum horizontal stress and / or fracture orientation and intensity. Corrections for HTI medium were applied prior to VTI anisotropic Kirchhoff pre stack time migration (KPSTM). Data processing created a prestack volume as input for inversion and a stacked volume as input for Ant Tracking.

Simultaneous inver

sion of the pre-stack data determined acoustic impedance (AI) and Poisson�s ratio (PR). A blind test of the inverted attributes is very encouraging. Sweet spots may be areas of anomalously low Poisson�s ratio (PR), away from faults, with high velocity anisotropy.

Ant Tracking reduces the risk of drilling near faults (a reservoir risk due to expected mineralization) by providing a high resolution image of fractures and faults beyond what can be interpreted from conventional seismic data. Faults were expected to be mineralized, with some mineralization extending out into the surrounding shales.

The resulting integration of Poisson's ratio, fractogram, and Ant Tracking provides effective delineation of areas with superior porosity and charge, areas with open fractures, and areas with faulting, outlining likely sweet spots as well as areas to be avoided in drilling.

Integration of anisotropic data processing with pre-stack seismic inversion and Ant Tracking provides a superior tool to explore for gas in gas shale.

Attachments


Event Contact	Event Coordinator
Arthur Berman	Arthur Berman
(713) 557-9076	(713) 557-9076
(281) 565-0215 FAX	(281) 565-0215 FAX

http://petroleumtruthreport.blogspot.com/

HGS General Lunch

Wednesday 28-Jan-09 11:30 AM to 1:00 PM CST

Speaker David Paddock

Position: Reservoir Characterization Team Leader and Principal Geophysicist
Company: Schlumberger DCS Reservoir Seismic Services USA

Biography

David Paddock is Reservoir Characterization Team Leader and Principal

Geophysicist for Schlumberger DCS Reservoir Seismic Services for the United States.

Since September 2000 Dave has been with Schlumberger Data & Consulting Services leading a wide range projects, but with a special emphasis on the onshore U.S. Previous to Schlumberger Dave was a geophysicist at ARCO and Vastar for 18 years, working in the greater Gulf of Mexico and Permian basins.