Sedimentary types in the Miocene of Lower Congo Basin is of dominantly deep water gravity flow.Analyses of drilling and logging data combined with study of high-resolution 3D seismic attributes reveal characteristics of the deep water sedimentary system and sequence of southwestern lower Congo Basin.About 7 third-order sequences can be recognized from the Miocene of Block A:massive transportation

water channels

levees

lobes

abandoned water channels

flood fans and deep sea mud under their respective sequence frameworks.Features and scales of gravity flow under these frameworks vary greatly:small-scale highly-bent gravity flow channels and levees were developed in the less intensive sedimentation of SQ1-SQ2 and SQ4-SQ5 and massive complex gravity flow channels

lobes and levees were developed during the large-scale deposition of SQ3 and SQ6-SQ7.An integrated development characterization of the units was performed to establish the sedimentary model in the area:the massive transportation occurring near continental slope

water channel-levee complexes and flood fans near provenance

and abundant water channels in highly-bent area and lobes at the end of water channels.The modal may provide guidance for further deep oil and gas exploration in the area.