Volcanic Rock Diagenesis and Characteristics Analysis of Reservoir Space of Yingcheng Formation in Yaoshen 2_3 Well Area

Research on volcanic rock diagenesis has important reference value in volcanic rock secondary pore formation, evolution and reservoir prediction. Using the core data, flakes, imaging logging, geochemical analysis and lithologies-lithofacies characteristics of Yaoshen 2_3 well area in Yingcheng Formation, Changling fault depression, we research on the volcanic rock diagenesis, reservoir space types, characteristics and relationships. The results are shown that: The research area mainly develop volcanic rock mantle thermal liquid alkali metasomatism and other 10 diagenesis types, and base on diagenesis formation mechanism and the effects of the reservoir spaces, which is divided constructive and destructive; The primary, secondary and composite pore types are all developed, base on the diagenetic stages, combination of porosity-fracture, which is identified further 12 types, almond body residual pore, matrix pore, intergranular pore-dissolved pore and suture fracture develop best; Volcanic rock diagenesis complexity are the main control factors of complexity and diversity in reservoir space types.