Improving the Structural Detail of a Subsalt Play: Phillips Petroleum Co.
Published:January 01, 1998
Craig S. Hartline, Kay Dautenhahn Wyatt, Paul A. Valasek, Scott A. Irvine, David A. Walker, Robert R. Sartain, 1998. "Improving the Structural Detail of a Subsalt Play: Phillips Petroleum Co.", The Seismic Velocity Model as an Interpretation Asset, Phil Schultz
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“Because much of the more accessible geological territory in presently known producing regions has been intensively explored, the search for oil is being extended to more remote areas and deeper regions.” This statement, which could just as easily be made today, was extracted from Phillips Petroleum Company's 1947 Annual Report. This report’s date of publication coincides with the offshore discovery of the Ship Shoal 32 Field. The 1947 discovery well, 10.5 miles off the coast of Terrebone Parish, Louisiana, was the first well drilled out of site of land in the world. This paper will review the history of the field, with an emphasis on the advancing technology which has been utilized in developing the salt-related hydrocarbon accumulations. This study will conclude with a discussion of 3D velocity model building and 3D prestack depth migration imaging recently completed for this area of complex structure and highly variable seismic velocity.
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The Seismic Velocity Model as an Interpretation Asset
“A velocity model can have enduring and growing interpretive value, beyond its initial creation to optimize the seismic image. The 3D velocity model often is built carefully with a combination of geophysical and geologic input because of the accuracy demands placed on it by the requirements of depth imaging. As such, this model becomes an increasingly effective interpretive tool. This book, first published for use with the second SEG/EAGE Distinguished Instructor Short Course, addresses ways in which the interpreter should participate in development of the velocity model and underscores the velocity model's interpretive value with numerous case-study examples. This volume will be invaluable to interpreters who are excited about the prospect of participating actively in the velocity model-building process and who wish to pursue aggressively the additional advantages offered by using the velocity model during interpretation. (Video course, 438B, is also available.)”