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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 68 (1984)

Issue: 4. (April)

First Page: 481

Last Page: 481

Title: Interactive Geologic Modeling: ABSTRACT

Author(s): J. D. Glaeser, Stephen A. Krajewski, Ron Budros


Improved success in finding hydrocarbons and minerals depends on developing geologic models from seismic, gravity, and magnetic Previous HitdataNext Hit that most closely approximate real-world settings. Although Previous HitdataNext Hit processing remains the chore of mainframe and minicomputers, interpretations and modeling of geologic and geophysical information now are best accomplished on personal computers because these computers afford the explorationist maximum freedom to shape and fine tune geophysical evaluations. Three case histories use the GEOSIM geophysical modeling systems to delineate exploration targets.

The first Previous HitexampleNext Hit is Silurian Niagaran reef trends in the Michigan basin. Here, differences in seismic reef anomalies result from variations in carbonate-evaporite stratigraphy encasing the reefs, reef geometry, and reef reservoir parameters. These variations which influence real seismic-response differences can be successfully matched using appropriate geologic models in generating synthetic seismic reef anomalies.

The second Previous HitexampleNext Hit applies gravity and magnetic Previous HitdataNext Hit to seismic modeling of a Wyoming coal Previous HitfieldNext Hit. Detailed seismic stratigraphy helps locate those portions of the Previous HitfieldNext Hit having multiple seams, although it does not resolve individual economic zones. Gravity Previous HitdataNext Hit do identify pinchout margins of multiseam zones and pinchouts between principal coals. Magnetic Previous HitdataNext Hit are then used to delineate the burn (clinker) margin.

Seismic modeling of subtle stratigraphic traps is the broader area of exploration interest contained in the first 2 examples. In the third, successfully modeled and tested examples of lateral changes in deltaic facies and of faulted, unconformity-bounded continent-margin sequences are shown to be successful guides to reinterpretation of seismic Previous HitdataTop.

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Copyright 1997 American Association of Petroleum Geologists