Abstract:

Point bar is the most important reservoir sand of sedimentary units in meandering river, whose internal side of lateral accretion bedding is the main factors of controlling the remaining oil distribution. This paper took the pilot test Five of Area II in Gangdong oilfield as an example, dissected the architecture of point bar by comprehensive use of logging, core, dense well, horizontal wells, etc. Quantitative understanding of lateral accretion thickness is about 0.2 to 0.3 m, inclination 3.5°, and lateral accretion body scale sizes are different in the test area. After that, the 3D super-fine model of inner point bar is established, through secondary infilling and embedding technology of grading times, and fine simulation studies is carried out. At the same time, logging, core, laboratory analysis, etc. are combined to find out the residual oil distribution law qualitatively, which are mainly in the top of sand and side of lateral accretion bedding. Applying geology-modeling-simulation integrated studies to setting up plan of reservoir and site implementation, good results is achieved. It provides an innovative idea and method for point bar configuration.

Key words: point bar, internal architecture, fine modeling, simulation, remaining oil