Reservoir characteristics and favorable reservoir prediction of the Enping Formation in Kaiping Sag,Pearl River Mouth Basin

In order to comprehensively promote the application of deep-water reservoir prediction technology in the Kaiping sag, the Pearl River Mouth Basin, we conduct a study on stratigraphic division and depositional system, together with lithologic and petrophysical properties in the Enping Formation, based on 3D seismic, drilling, and logging data. The log-constrained sparse spike inversion is utilized to determine the spatial distribution of favorable sandstone reservoirs. Combined with the seismic multi-attribute analysis method, multiple attributes with varying sensitivities to seismic information were extracted along the layer. Three attributes with high correlation coefficients were selected for weight fusion. Drilling data reveal that deeply buried Eocene formations in the Kaiping sag consist of interbedded sandstones and mudstones. Sandstones in the Enping Formation have better reservoir properties, i.e. higher porosity and higher permeability, than in the Wenchang Formation. According to sedimentation, reservoir properties, seismic inversion results, and seismic attribute analysis, deltaic sandstones with good continuity and high impedance in the Enping Formation may function as promising reservoir rocks. The northwest of KP11 tectonic zone is predicted to be a promising area for drilling. A favorable drilling well location is proposed aiming to establish a theoretical direction for future oil and gas exploration.