TITLE:
Study on the Depositional Characteristics of Tidal Flat and Barrier Bars in Bohai Oilfield and Reservoir Prediction
AUTHORS:
Jianmin Zhang, Xijie Wang
KEYWORDS:
Mid-Deep Layer, Shoal Bar, Waveform Indication, Quantitative Prediction
JOURNAL NAME:
Open Journal of Geology,
Vol.15 No.11,
November
6,
2025
ABSTRACT: The Bohai A Oilfield is located in the southwest gentle slope belt of the Bohai Depression, forming an overall anticlinal structure adjacent to the southwest depression of the Bohai Depression. It possesses favorable reservoir and preservation conditions, making it highly conducive for hydrocarbon accumulation. In the study area, the deep-middle layer tidal-flat-bar reservoirs are influenced by seismic signal-to-noise ratio and resolution, making it difficult to characterize the distribution range of sand bodies using conventional methods. Based on the study of reservoir pore space characteristics, this paper clarifies the favorable development zones of tidal-flat-bar sand bodies through paleogeomorphic restoration. By waveform classification, the model waveform features of near-well paths are obtained, enabling the evaluation of the distribution characteristics of typical tidal-flat-bar reservoirs in favorable development areas. Consequently, the quantitative delineation of reservoir spatial extent and thickness is effectively achieved. The predictive results show good consistency with drilled wells and regional sedimentary understanding.