Joint Using PP-Wave and PS-Wave Elastic Impedance to Construct Reservoir Sensitive Elastic Parameters

Due to the different seismic amplitude information carried by PP-wave and PS-wave, the sensitive of PP-wave and PS-wave to reservoir are different. The joint using of PP-wave and PS-wave information can reduce the multi-solution of reservoir prediction. The construction of conventional elastic parameters is mainly based on PP-wave seismic information. This study investigates elastic parameter construction by using PP-wave and PS-wave elastic impedance jointly. Based on the previous research on PS-wave elastic impedance, a new form of PS-wave elastic impedance equation which can keep consistency with the PP-wave elastic impedance equation is derived. According to the construction formula of conventional elastic parameters, we use PP-wave and new PS-wave elastic impedance instead of P-wave and S-wave impedance to construct a new kind of elastic parameter with the concept of angle elastic parameter. Compared with the conventional elastic parameters, the angle elastic parameters have incidence angle and PS-wave information and can be used as sensitive indicators of reservoir. Both the model and real data show that the angle elastic parameters have high sensitivity to the beneficial reservoir.