Many large Mississippian fields (5-130 MMBO) in south-central Kansas and northern Oklahoma produce from discrete pods of porous chert and dolomite called 'chat.' Chat has unusual acoustic properties that allow the porosity pods to be recognized on seismic sections.Integrated geologic and geophysical studies of two analog fields indicate that both reservoir quality and geometry can be interpreted from good quality seismic data. Seismic modeling on an interactive work station plays an important role in developing these interpretations.

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