Sedimentary Characteristics and Depositional Model of a Shallow‐Water Braided Delta in the Enping Formation, Lufeng X Oilfield, Pearl River Mouth Basin, China

Based on core observations, well‐log data, and 3D seismic attributes, this study integrates lithofacies analysis, log‐facies interpretation, and seismic‐facies delineation to investigate the sedimentary characteristics and depositional architecture of the Enping formation in the Lufeng X Oilfield, Pearl River Mouth Basin. The Enping formation is interpreted as a shallow‐water braided delta system composed of distributary channels and interdistributary bays on the delta plain and underwater distributary channels, mouth bars, and interdistributary bays on the delta front. From the delta plain to the delta front, single‐channel sand bodies evolve from vertically erosional stacking to lateral channel‐stacking and isolated patterns, accompanied by decreasing channel scale, increasing channel number, and reduced connectivity. Seismic attribute calibration indicates that RMS amplitude responds positively to sand‐prone intervals, whereas RGB spectral decomposition attributes help delineate facies boundaries. On this basis, the spatial distribution and evolutionary pattern of the Enping formation sedimentary system are reconstructed, and a shallow‐water braided‐delta depositional model with a dominant sediment source from the northeast is proposed. The results provide a geological basis for reservoir prediction and remaining‐oil evaluation in the Paleogene interval of the Lufeng X Oilfield.