VERY HIGH RESOLUTION PSEUDO WELL LOGS OF VELOCITIES, PERCENTANISOTROPY, AND DENSITY FROM SEISMIC DATA

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$49,928.00
Award Year:
1989
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
10882
Agency Tracking Number:
10882
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Po Box 218470, Houston, TX, 77218
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr W Daniel Heinze
Principal Investigator
(713) 578-6000
Business Contact:
() -
Research Institute:
n/a
Abstract
THE TRAVEL TIMES OF COHERENT EVENTS IN SEISMIC SURVEYS OF THE CRUST PRINCIPALLY GIVE INFORMATION ABOUT THE LOW SPATIALFREQUENCY VELOCITY FIELD; DETAILS OF THE SEISMIC SIGNATURES OF BACKSCATTERED EVENTS PRINCIPALLY GIVE INFORMATION ABOUT THE HIGH SPATIAL FREQUENCY OF THE VELOCITY AND DENSITY FIELDS (WHICH CAN BE REPRESENTED BY PSEUDO WELL LOGS). TRAVEL TIME INVERSION IS BEGINNING TO FIND PRACTICAL APPLICATION IN THE OIL INDUSTRY. HOWEVER, COMMERCIALLY USEFUL EXTRACTION OF PSEUDO WELL LOGS FROM MOST SEISMIC DATASETS IS SOME TIME OFF. THE KEY TO BOTH SOLUTIONS LIES IN A SUCCESSFUL COHERENT EVENT-PICKING PROCEDURE THAT CAN OPERATEACCURATELY AND STABLY IN THE PRESENCE OF BOTH RANDOM AND COHERENT NOISE. THE ACCURACY OF THE TRAVEL TIME INVERSION WILL INCREASE WITH THE NUMBER AND ACCURACY OF THE PICKS. PICKS MUST BE MADE BASED ON TARGET WAVELET ESTIMATES AT VARIOUS SOURCE-RECEIVER OFFSETS. THESE TARGET WAVELETS CAN BE INVERTED FOR THE PSEUDO WELL LOGS. PHASE I WILL DEVELOP A SEISMIC MODELING-AIDED, COHERENT EVENT DECOMPOSITION CLASS OF PICKING ALGORITHMS THAT SHOULD BE ACCURATE AND STABLE IN THE PRESENCE OF BOTH RANDOM NOISE AS WELL AS INTERFERENCE FROM OTHER COHERENT EVENTS. SIMULTANEOUSLY, ITSHOULD BE ABLE TO EXTRACT ACCURATE TARGET WAVELET ESTIMATES AT EACH OFFSET THAT HAVE A MAXIMIZED SIGNAL-TO-NOISE RATIO.

* information listed above is at the time of submission.

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