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Houston Geological Society Bulletin


Houston Geological Society Bulletin, Volume 38, No. 3, November 1995. Pages 11-11.

Abstract: Case Studies Using Sequence Stratigraphy on an Interactive Previous Hit3-DNext Hit Previous HitSeismicNext Hit Workstation


D. Bradford Macurda, Jr.1 and Gary L. Jones2
1The Energists
2Landmark Graphics Corporation

Interpretation of 2-D and Previous Hit3-DNext Hit Previous HitseismicNext Hit Previous HitdataNext Hit using workstations has greatly enhanced our exploration and exploitation efforts. The ratios of successful/nonsuccessful wells have improved, and finding costs have been reduced. The primary emphasis of these efforts has been Previous HitstructuralNext Hit interpretations, however. This has been dictated largely by the available software. The stratigraphic component has been underutilized and not exploited. Review of many case histories that describe the traps as being Previous HitstructuralNext Hit shows stratigraphy to be a significant component of the traps.

Stratigraphic analysis of Previous HitseismicNext Hit Previous HitdataNext Hit on workstations is now possible; software is available Previous HitfromNext Hit several sources. We have Previous HitappliedNext Hit these tools to interpretation problems in the Gulf of Mexico, North Sea, North Africa, South America, and southeast Asia. The methodology involves describing and assigning values for Previous HitseismicNext Hit attributes such as the external geometry, internal reflection configuration, amplitude, and continuity to areas bounded horizontally by horizons and vertically by internal partitions ("schzaa M" lines). These attributes and well Previous HitdataNext Hit are used to make lithofacies, systems tracts, and depositional environment predictions for each interval of interest. The predictions are then interactively projected to map view. Their values are electronically contoured to produce maps of the Previous HitseismicNext Hit facies, external geometry, continuity, amplitude, systems tracts, lithofacies, and depositional environments; these can easily be plotted at various scales. It is also possible to effect a chronostratigraphic analysis and restore missing intervals.

We will present case histories Previous HitfromNext Hit the Gulf of Mexico and North Sea that will show the application of these types of analyses to carbonate ramps, deltaic clastics, submarine fans, and basin Previous HitinversionTop and erosion.

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