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February 22, 2006 --"Twenty-five years ago this month, the AAPG Bulletin published Andy Bengtson's classic paper, Statistical Curvature Analysis Techniques for Structural Interpretation of Dipmeter Data," said Jim Morse, Computational Geology's President. "We'd like to take this opportunity to recognize and honor Andy posthumously for the significant contributions he made to structural geology and the petroleum E&P industry."

"Despite the many significant advances in seismic imaging over the past twenty-five years, SCAT is still essential for mapping structures completely and accurately," Morse continued. "SCAT is required wherever seismic is fair or poor and wherever structures are complicated. Geologists and geophysicists around the world are using SCAT to map structures in many different geologic environments: from subsalt fields cut by complex patterns of normal faults (e.g., Gulf of Suez) to complicated compressional folds (e.g., southern Oklahoma, Bangladesh, and Egypt's Western Desert). Geoscientists are also using SCAT to pick and orient faults--including faults that cannot be resolved seismically and those that cannot be seen through log correlations or conventional tadpole-plot analysis."

"In certain important respects, dips picked from wellbore image data are better than conventional dipmeter data, but wellbore image data often are collected just over a short interval of a well. Moreover, dips picked from wellbore image data must still be analyzed and interpreted. In short, dips from wellbore image data can also benefit greatly from SCAT."

"An article in the January, 1992, AAPG Explorer (Fritz, 1992) describes how Andy developed SCAT. It turns out that he actually developed SCAT many years prior to the publication of his 1981 paper. During that time, Chevron (Andy's employer) used SCAT extensively and profitably. Originally, Chevron had hoped to maintain a competitive edge by keeping SCAT proprietary. However, in the 1970s, as many of Chevron's geoscientists left to go to work for other companies, this proved to be a practical impossibility."

"Although SCAT has been in the public domain for twenty-five years and although SCAT is a proven technology for helping geoscientists substantially improve their structural models, many geoscientists remain unfamiliar with SCAT. Thus, popularizing SCAT remains an important technology-transfer objective for the E&P industry."

NOTE: Andy's SCAT paper was first published in 1980 by the Oil & Gas Journal.

Computational Geology is a U. S.-based provider of specialty geological software and interpretation services. Current products and services focus on 3D analysis and interpretation of dip data using advanced techniques, including SCAT and isogon-based cross sections.

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