Origin and classification of the composite sand bodies of the delta front in K1q4 of the Quantou Formation in the central region of the Fuyu oil field

This study discusses the formation mechanisms of the delta front reservoir of K1q4 of the Quantou Formation in the central region of the Fuyu oil field and summarizes the types of deposition based on an analysis of facies markers and a comprehensive study of the sedimentary microfacies using well cores, logs, and geologic data. The results show that K1q4 of the Quantou Formation mainly formed through shallow-water sedimentation on a delta front...