Prediction of carbonate reservoir in platform based on the multiplication of amplitude-frequency attribute fusion body

The dolomite reservoir of Algal mound beach facies in the fourth member of the Sinian DengYing Formation (abbreviation as Z₂dn⁴ Formation) of Hechuan area is developed, and the characteristics of seismic response are complex. Based on the well seismic characteristics and the combination of forward modeling and actual response characteristics, three types of reservoir assemblage are identified in the Z₂dn⁴ Formation in Hechuan area. Type I reservoir assemblage - the top of the Z₂dn⁴ Formation is the dissolution fracture-cavity type reservoir. The Z₂dn⁴ Formation presents the response characteristics of “top weak and complex wave”. Type II reservoir assemblage -- internal fracture-cavity reservoir is developed, and the Z₂dn⁴ Formation presents the response characteristics of “top strength and internal disturbance”. Type III reservoir assemblage - the reservoir is poorly developed, and the Z₂dn⁴ Formation is characterized by “top strength and narrow trough” response. The quantitative intersection analysis shows that the individual well productivity or reservoir development is inversely proportional to the amplitude and frequency. By using attribute fusion body technology to make the multiplication of amplitude frequency attribute fusion body attribute, the coincidence rate of high quality reservoir of the Z₂dn⁴ Formation reaches 90.4%, which effectively supports the well location deployment of the Z₂dn⁴ Formation in Hechuan area.