Volcanic Diagenesis and Influence on the Reservoir Space Evolution of Yingcheng Formation in Xunjiaweizi Fault Depression

The research on volcanic diagenesis have important value in volcanic secondary pore formation, evolution and reservoir prediction. Using core, slice, imaging logging and geochemical analysis, from lithology-lithofacies characteristics of Yingcheng Formation in Xujiaweizi depression, Songliao Basin, study on volcanic diagenesis, types, characteristics and relationship of reservoir space. The results are shown that: The volcanic mainly developed dissolution 13 diagenesis types, and base on the formation mechanism and effect to the reservoir space, it is divided further into constructive and destructive categories In the study area; Reservoir performance of reservoir space depend on the type, combination form and development degree, and the diagenesis is main control factor of rservoir space (pore, crack) formation, preservation, damage evolution characteristics; volcanic diagenetic complexity is the main reason of reservoir space complexity and diversity.