Application of key technologies for Ordovician imaging processing in KDKZ3 block of Tarim basin

In KDKZ3 block of Tarim basin,the main target strata of Ordovician have complex structure, developed fractures and caves,while the seismic data have low signal-to-noise ratio and there exists much difficulty in imaging. In order to improve the imaging accuracy of seismic data,through the application of micro-logging constrained tomography static correction technology,processing technology based on lowfrequency effective signal protection,high-precision depth domain velocity modeling technology for fine imaging of Ordovician carbonate rocks,reverse-time migration and other technologies, the imaging accuracy of complex geological structures inside the Ordovician was improved,and the reflection characteristics of various traps in middle and lower Ordovician-upper Cambrian carbonate rocks were highlighted,which therefore provides reliable seismic data for the further implementation of the distribution of fracture-cave Ordovician reservoirs in Paleozoic.