Seismic sedimentology for development of Daqing Changyuan Oilfield

As the research and application of seismic sedimentology continue, a number of problems are encountered during the prediction of thinly interbedded continental sand-mud reservoirs in the development area with a dense well pattern in Daqing Changyuan Oilfield. Such problems include low efficiency of stratal slice optimization, difficult matching analysis of logging and seismic data information, and lack of quantified correlation of stratal slices with reservoir thickness. Therefore, methods such as automatic stratal slice optimization, plane reliability analysis of seismic attributes, and quantitative thickness prediction integrating logging and seismic data are studied after the analysis of wave impedance characteristics and amplitude-preserved seismic data processing based on geological targets. As a result, the basic framework of seismic sedimentology-based technology for Daqing Changyuan Oilfield is established, and reservoir prediction software integrating logging and seismic data is developed to improve the accuracy and efficiency of seismic sedimentology-based reservoir prediction for the development of the Changyuan Oilfield. Practical applications show that the development area with a dense well pattern is still subject to sand body changes that cannot be controlled with logging data and that narrow channels with a width less than half the well spacing are likely to develop between wells. The prediction and analysis of such geological phenomena with seismic sedimentology are of great significance for oilfield development. © 2022, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.