Abstract:

The use of Differential Interformational Velocity Analysis (DIVA) in hydrocarbon seismic indication in Northern Tarim Basin is discussed in this paper, and the procedures of the DIVA mapping and interpretation have been improved so that the procedures may be applied to indicate hydrocarbon in deeper (>4500m) strata. The results of the comparation and analysis of Shacan-2 and Sha-7 wells suggested that the hydrocarbon potential of the formations is closely related to the abnormal zones of differential interformational velocity. The abnormal amplitudes fit well with the amounts of hydrocarbon in corresponding formation sections. This shows that the DIVA procedure could not only be used to detect formation porosity, but also could be used to detect subsurface hydrocarbon even in deeper strata.