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Title: Formation pressure prediction with seismic data from the Gulf of Mexico

Abstract

In this paper, the authors derive seismic formation-pressure logs using seismic data from offshore Louisiana to delineate the distribution of overpressured zones in the subsurface. The seismic-data processing consists of velocity modeling, wavelet processing, and seismic inversion. From the acoustic impedances produced by seismic inversion, the authors derive seismic velocity and density logs at every seismic tracer location using a relationship between sonic velocities and acoustic impedances. The authors use these logs to compute the seismic formation-pressure logs vs. depth. Formation-pressure logs are calculated with the assumption that compressional velocity, means density, and depth are proportional to formation pressure. These logs are constrained at every depth by estimated matrix and fluid compressional velocities (v{sub max} and v{sub min}). v{sup max} and v{sub min} are derived from porosity and sonic well-log information. Results include profiles of seismic-velocity, seismic-density, and formation-pressure logs for two intersecting seismic lines from offshore Louisiana. Log from one well are used to constrain the data processing. The seismic formation-pressure sections delineate a large region of overpressured shales in the subsurface.

Authors:
;  [1];  [2]
  1. Halliburton Geophysical Services Inc. (US)
  2. Stanford Univ., CA (United States)
Publication Date:
OSTI Identifier:
5739991
Resource Type:
Journal Article
Journal Name:
SPE Formation Evaluation (Society of Petroleum Engineers); (United States)
Additional Journal Information:
Journal Volume: 6:1; Journal ID: ISSN 0885-923X
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 47 OTHER INSTRUMENTATION; GULF OF MEXICO; SEISMIC SURVEYS; WELL DRILLING; OIL FIELDS; PRESSURE MEASUREMENT; ACOUSTIC TESTING; DATA PROCESSING; LOUISIANA; OFFSHORE OPERATIONS; POROSITY; RESERVOIR PRESSURE; SEISMIC WAVES; VELOCITY; WELL LOGGING; ATLANTIC OCEAN; CARIBBEAN SEA; DEVELOPED COUNTRIES; DRILLING; FEDERAL REGION VI; GEOLOGIC DEPOSITS; GEOPHYSICAL SURVEYS; MATERIALS TESTING; MINERAL RESOURCES; NONDESTRUCTIVE TESTING; NORTH AMERICA; PETROLEUM DEPOSITS; PROCESSING; RESOURCES; SEAS; SURFACE WATERS; SURVEYS; TESTING; USA; 020200* - Petroleum- Reserves, Geology, & Exploration; 440700 - Geophysical & Meteorological Instrumentation- (1990-); 440400 - Well Logging Instrumentation

Citation Formats

Martinez, R D, King, G A, and Schrueder, J D. Formation pressure prediction with seismic data from the Gulf of Mexico. United States: N. p., 1991. Web. doi:10.2118/16621-PA.
Martinez, R D, King, G A, & Schrueder, J D. Formation pressure prediction with seismic data from the Gulf of Mexico. United States. doi:10.2118/16621-PA.
Martinez, R D, King, G A, and Schrueder, J D. Fri . "Formation pressure prediction with seismic data from the Gulf of Mexico". United States. doi:10.2118/16621-PA.
@article{osti_5739991,
title = {Formation pressure prediction with seismic data from the Gulf of Mexico},
author = {Martinez, R D and King, G A and Schrueder, J D},
abstractNote = {In this paper, the authors derive seismic formation-pressure logs using seismic data from offshore Louisiana to delineate the distribution of overpressured zones in the subsurface. The seismic-data processing consists of velocity modeling, wavelet processing, and seismic inversion. From the acoustic impedances produced by seismic inversion, the authors derive seismic velocity and density logs at every seismic tracer location using a relationship between sonic velocities and acoustic impedances. The authors use these logs to compute the seismic formation-pressure logs vs. depth. Formation-pressure logs are calculated with the assumption that compressional velocity, means density, and depth are proportional to formation pressure. These logs are constrained at every depth by estimated matrix and fluid compressional velocities (v{sub max} and v{sub min}). v{sup max} and v{sub min} are derived from porosity and sonic well-log information. Results include profiles of seismic-velocity, seismic-density, and formation-pressure logs for two intersecting seismic lines from offshore Louisiana. Log from one well are used to constrain the data processing. The seismic formation-pressure sections delineate a large region of overpressured shales in the subsurface.},
doi = {10.2118/16621-PA},
journal = {SPE Formation Evaluation (Society of Petroleum Engineers); (United States)},
issn = {0885-923X},
number = ,
volume = 6:1,
place = {United States},
year = {1991},
month = {3}
}