## 3 Actual Seismic Data Application
### Application Example in SHB-YM Block  
Taking the SHB-YM area as an example, one of the design purposes of the YM801-H6 well in the block is to drill the weak reflection controlled by the fractured zone. After entering the target formation, the vertical fracture zone is designed to drill horizontally along the formation. During the drilling of the well, 7327.50 m encountered drilling fluid loss, and the interval of 7433.09-7278.00 m encountered drilling tool venting. Subsequently, it was transferred to oil and gas test production operations, and perforation tests were carried out in the open hole section of 7278.00-7440.00 m, and finally high-yield industrial oil gas flow was obtained (Figure 6). The maximum oil production reached 600 tons per day. After maintaining stable production for a period of time, water content was obtained. It rises in steps and then controls the smooth production of the nozzle (Figure 7). In fact, the data profile of the best migration processing results implemented so far does not reveal the characteristics of large-scale reservoirs around the wellbore and cannot explain the characteristics of the YM801-H6 well, such as drilling and test production. That is, the seismic interpretation plan does not match the actual drilling and production. Figure 5: Comparison of outcrop characteristics, underground formation micro-scanner image(FMI) logging characteristics, seismic profile characteristics and attribute plane distribution characteristics of complex karst fracture cave system. (**a**) Ordovician carbonates SSFCRs outcrops in the Tarm Basin. (**b**) FMI logging data, the gray blacks are dissolved pores. (**c**) seismic profile, it is proved by drilling that the string beads are the comprehensive response characteristics of fracture cavity body. (**d**) plane attribute characteristics, the fault zone demonstrates the characteristics of bright spots and is distributed in bands. The seismic profile along the YM801-H6 well, trajectory is characterized by band-like cluttered reflections of different widths, lengths, and energy strengths (Figure 8a), but they are not typical. We extracted the Root mean square (RMS) attributes of the target layer in the well area along the layers and found that the attribute features have but no obvious plane distribution rules (Figure 9a). In the results of the conventional seismic profile and attribute plane, the characteristics of a developed fault zone can only be vaguely displayed. The characteristics of weak anomalies are disturbed by the flake's strong reflection background in the South and North. The wave group anomalies caused by these anomalies are not affected by the presence of a fault zone. Figure 6: YM801-H6 well mud logging comprehensive profile. (rate of penetration: ROP). Figure 7: Curves of production data of YM801-H6 well. (**a**) Curves of wellhead liquid production, water production and rate of water content with time; (**b**) Nozzle and monitoring oil pressure curve with time. heterogeneous reservoirs are submerged in the background. This makes it impossible to effectively identify the characteristics of the FVRs. In view of the above situation, we apply the method of this paper to carry out targeted research and calculate the heterogeneous body wave field heterogeneous information data body. From the well tie profile SWFA data section (Figure 8b) and the target layer RMS amplitude attribute plan (Figure 9b) extracted based on the SWFA data, the characteristics of the fault zone and the high-quality heterogeneity can be clearly distinguished. The new data reveals that develops a north-east-spanning fault zone with a width of 50-350 m (vertical principal displacement zone) in the area, which controls a large number of high-quality zonal-distributed reservoirs and provides a material basis for continuous fluid transport and energy replenishment. The SHBI-3 well, which is far away from the fault zone (about 500 m), has not drilled a good reservoir, and the production effect after reservoir reconstruction is not ideal.