Field Seminar on Seismic and Sequence Stratigraphy of Carbonate Systems: the 3 step procedure
Step 3 - Subdivide megasequences into higher order sequences and build a geological model to develop play concepts.
Individuate higher order shifts of facies belts which modulate the long-term sedimentary record of a megasequence and put results in a sound geologic model. Once the geological model is established, the next step is to develop play concepts within the framework of higher order sequences, by identifying the depositional environment that most likely contains source rock potential and reservoirs in the drainage of the source rocks.
Sequence boundaries of higher order sequences are better highlighted by vertical changes in facies and stratal stacking patterns rather than subaerial unconformities. The analysis of vertical succession of facies in stratigraphic sections and seismic-scale panoramic views of the margin to basin transition lead very rapidly to a perception of lateral displacement of facies belts.
Detailed prospect mapping in areas of favorable reservoir rock and seal development is used to construct a probability map and to highlight areas with high chance of success.
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