Frequency-Decomposed Multi-seismic-Attributes RGB Fusion Technology Applied for the Paleogene Sokor Formation Reservoir Prediction in K Area, Termit Basin, Niger

The study area K is located in the center of the Fana Low Uplift in the Termit Basin, Niger, which is known as one of hydrocarbon-prone zones in this basin, where the oil producing Paleogene Sokor reservoir is dominated by the delta front underwater distributary channels and estuary bars, and the facies variation is fast, leaving the prediction of the distribution of favorable sand bodies the key issue for the further oil-fields development. In this article, the regional sedimentary characteristics, drilling and seismic data are integrated to study the sedimentary characteristics. It is believed that the Paleogene Sokor1 Formation mainly developed underwater distributary channel, estuarine bar, distal bar, interdistributary bay, beach bar sand and shore-shallow lake mud sedimentary microfacies. Through intensive well seismic calibration and forward modeling, the logging curves and seismic reflection characteristics of different lithologic associations are identified, and it is believed that seismic reflection characteristics have good correlation with sedimentary microfacies, and the well-seismic characteristics and seis-mic facies identification chart of 6 sedimentary microfacies in the study area are generated. On this basis, the spatial distribution of underwater distributary channel sand bodies are accurately characterized by using Frequency-Decomposed Multi-Seismic-Attributes RGB Fusion, seismic attribute analysis and other research, incorporated with drilling calibration and forward modeling. The result is consistent with the plane calibration of the drilled well, which provides a geological basis for the planning of development wells.