Sedimentary system of the Lower Hanjiang Formation in Kaiping Sag,Pearl River Mouth Basin
For a long time,there has been a lack of research on the plane distribution of sedimentary system of the ancient Pearl River delta-deep water fan in Kaiping area.Based on 3D seismic data and drilling data,the sedimentary sys-tem of the Lower Hanjiang Formation in Kaiping Sag has been studied by using seismic sedimentology method.The study shows that the sedimentary system of shelf margin delta-slope fan is mainly developed in the study area,and six types of sedimentary units such as estuarine bar,coastal sand ridge,shelf sand ridge,sheet sand,slope fan and deep cement are developed in it.The shelf area mainly develops the far end deposits of ancient Pearl River delta front,and the main flow path is near north-south or NE-SW direction.A large number of shelf sand ridges are developed at the edge of shelf,dis-tributed in NW-SE direction,and the scale of single sand ridge is small.Large scale slope fan deposits,which are mainly composed of massive overlapping fan sand bodies with typical fan-shaped characteristics,are developed in the slope area.The basin area mainly develops argillaceous deposits,and the sand body is not developed.Overall,a large number of thick sand bodies are developed in the sequence of SQ13.8.They are easy to form lithologic traps and have the conditions for the development of oil-gas reservoirs.The research results can provide a basis for the prediction of reservoir distribution of the lower Miocene in Kaiping Sag.
万方数据
维普
