Reservoir characteristics and influencing factors analysis of Yaoyingtai oilfield

Based on rock slices identification,core analysis and logging data,the study on petrologic characteristics and reservoir properties of Yaoyingtai oilfield,and the influencing factors analysis of reservoir properties have been carried out.The results showed that the reservoirs of Qingshankou formation are mainly of feldspathic sandstone,with lithology of fine sandstone and siltstone,moderate sorted,mid-poor rounded,lower sandstone compositional maturity,and mid-low structure maturity.The reservoir pore structure is complex,the heterogeneity degree is high and the largest connected pore throat is generally small.The main pores include intergranular pores,dissolution pores and micropores.The reservoirs belong to low-porosity ultra-low permeability and ultra-low-porosity super-low-permeability.The main influencing factors are mainly sedimentary microfacies,debris composition and structure,and diagenesis.