Abstract: Langa anticline belt located in southern Tahe oil field is of condition of non-anticline trap with low degree of exploration. The conventional inversion method depending on the initial model could inversion not be used to get exact inversion result, while the constrained sparse-pulse inversion does not depend on any model but on the characteristics of original data. This paper presents the principle of the constrained sparse-pulse inversion technology and its application to Langa area in reservoir prediction, including extraction of the wavelet of seismic traces near the borehole, synthetic seismogram, horizon calibration, wave impedance inversion, and conversion of obtained the absolute wave impedance profile into sand-shale seismic profile. The results are accordant with the drilling results.

Key words: reservoir rock, prediction, pulse, synthetic seismogram, wave impendence