3-D Seismic Interpretation by M. Bacon

By M. Bacon

This e-book introduces geophysicists and geologists to the means of studying 3-D seismic facts. the subjects it covers contain easy structural interpretation and map-making; using 3D visualization tools; interpretation of seismic amplitudes; the iteration and use of AVO and acoustic impedance datasets; and time-lapse seismic mapping. Written by means of specialist geophysicists with decades of operating adventure within the oil undefined, the ebook should be necessary for graduate scholars, researchers, and new entrants into the petroleum undefined.

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Re The next stepsin theprocessingsequence Migration is one of the key stepsin seismicdata processing- it is the step which attemptsto move the recordeddata so that eventslie in their correctspatiallocation ratherthan their recordedlocation (flgs. 32). There are a numberof texts,suchas Stolt & written Benson(1986),Berkhout(1982,1984)andBancroft(1997,1998),specifically are more there aboutseismicmigrationthat describethe mathematicsin detail. Large dips may meanthat shallower(slower) eventsarrive at the sametime as deeperevents,giving rise to the two eventsneeding to stackat the sametime but with differentvelocities(fig.

Once sortedinto CMP gathersthe number of traceswithin each gatherhas doubled and the trace separationhas halved. rto underlying primaries,andif it is not removedit mayobscurethedeeperreflectivity. The next stepin fig. 26 explains the differences between primary events and multiples. Here again there are a large number of choices of technique. Methods are based either on velocity moveout differences, or on prediction based on the timing and geometry of the cause of 42 - andplocessing dataacquisition 3-Dseismic the multiple.

There are a numberof texts,suchas Stolt & written Benson(1986),Berkhout(1982,1984)andBancroft(1997,1998),specifically are more there aboutseismicmigrationthat describethe mathematicsin detail. Large dips may meanthat shallower(slower) eventsarrive at the sametime as deeperevents,giving rise to the two eventsneeding to stackat the sametime but with differentvelocities(fig. Suchan occurrenceis known as a stackingconflict andthe solutionis to migratethe databeforestack The 47 - 3-Ddataprocessing DepthModel distance distance Fig.

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