Sunday, January 18, 2015

Consistency of Seismic Interpretation

It is rare that the correctness or incorrectness of an interpretation can be ascertained because the actual geology is rarely ever known in adequate detail. The test of a good interpretation is consistency rather than correctness (Anstey, 1973). Not only must a good interpretation be consistent with all the seimic data, it also must be consistent with all that is known about the area, including gravity and magnetic data, well information and surface geology, as well as geologic and physical concepts.

One can usually be consistent and still have a choice of interpretations, the more so when data are sparse. The interpreter should explore various possibilities, but usually only one interpretation is wanted, that which offers the greatest possibilities for significant profitable hydrocarbon accumulation (assuming this is the objective).

An interpreter must be optmistic, that is, he must find the good possibilities.whereas a nonoptimistic interpretation may result in abandoning the area. Management is usually tolerant of optmistic interpretations that are disproven by subsequent work, but failing to recognize a possibility is an "unforgivable sin."

(Sherrif. 1995. Exploration Seismology)

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