hydrocarbon indicators  search
BTgeophysical methods
 .seismic methods
 ..hydrocarbon indicators
UFdirect hydrocarbon indicators
RTgeophysical surveys
 AVO methods
 petroleum exploration
 bottom-simulating reflectors
 indicators
 seismic stratigraphy
SNBefore 1993, also search bright spots. For surveys, also index geophysical surveys and specific method. Added to Thesaurus in 1993.