Underwater distributed channel sandstone reservoir characterization in Kumkol South Oilfield, South Turgai Basin

Under the guidance of modern river distribution pattern, the architecture characteristics and sedimentation mechanism of distributed channelis studied with the core, log and seismic data. Based on the research mentioned above, with the increasing of A/S, the shape of composite distribution channel sand body is varied as sheet belt and wide belt and narrow belt and band-like belt.There are three types of single distributed channel, including the high sinuous distributed channel and the low sinuous distributed channel and the straight distributed channel. As the accommodation increasing and the sediments supply decreasing, the distributed pattern of the single distributed channel changes from the high sinuous distributed channel to the low sinuous distributed channel and the straight distributed channel. There are three types of mudstone interlayer in the single distributed channel. The continuous mudstone interlayer has high GR of SP value and is mainly developed in the straight distributed channel and its size is relatively large. The complex mudstone interlayer has medium GR of SP value and is mainly developed in the low sinuous distributed channel and its size is medium. The discontinuous mudstone interlayer has low GR of SP value and is mainly developed in the high sinuous distributed channel and its size is relatively small.