Application of multi-wavelet decomposition technique to reservoir prediction: A case study of the Yijianfang Formation in SN block, Tarim Basin

Good oil and gas shows were found in strong wave trough of the Yijianfang Formation in SN block of the Tarim Basin. Due to the shielding effect of the strong wave peak of T₇⁴ interface, general amplitude property could not effectively predict reservoir distribution while forward results also had multiple solutions. Multi-wavelet decomposition and reconstruction technique as well as the third component were introduced to predict reservoirs in the study area. The reservoir boundary and range predicted based on lower seismic tracks agreed with those based on the third component and drilling results. Zones with high amplitudes are favorable for reservoir development. Multi-wavelet decomposition technique can remove the influence of strong axis, and get a better reservoir recognition result.