The Architectural Structure Of Meandering Point Bar

The north second district of Daqing lamadian oil field, belong to the big river delta sedimentary system, at present has entered the stage of tertiary oil recovery. In the study area, the meandering river deposition developed, due to the discontinuous interlining in layer distribution inside the reservoir and abandoned channel block,remaining oil show highly fragmented state, this has a great block for residual oil exploration work, and the reservoir internal structure characterization techniques can be quantitatively given internal heterogeneous distribution of sand body, so it is necessary to study architectural structure of the reservoir.In this paper, through investigation and research domestic and foreign research present situation, By researching of north second district SⅢ meandering point bar in Lamadian oilfield, according to three wells core data,138 wells logging and dynamic and static data, on the basis of the point bar sand deposition evolution and development of research on model systems, carried out the quantitative characterization of four structures(lateral accretion layer) in research area. Achieved the following understanding: Side of the plot is a typical iterative model crescent in research area; lateral accretion layer mainly developed in five parts of points, which is lower, middle, upper middle, upper, and top, the inclination is between 1-20°, and in inversely “S” type, down angle moderate, middle steep. And put forward five kinds’ identity standards according to core and logging relations, and made out three kinds of quantitative characterization methods. Then put forward three kinds of platform combination styles and five kinds of vertical stacking patterns of abandoned channels according to abandoned channel structure characteristics and combination form.Finally use SⅢ4+5 the area of dense well pattern in daqing lamadian oil field as an example, with the proposed technology and methods analyzed the effective of high water cut stage of oilfield water injection development.