The Architecture Research Of The Channel Sand In The Horizontal Well Of The Xing 8^th-9^th Area

With oil fields developing,many oil fields have gone into high water-cut period. Especially the Daqing oil field has went into later development stage of extra-high water-cut period. The distribution of remaining oil in space is highly scattered. Facing the task of 40 million ton production, how remaining oil was produced has become a great difficult problem of increasing recovery efficiency. The point bar of meandering stream channel accounted for a substantial proportion of reservoirs with containing remaining oil. Many problems, including distribution of internal filtration field, distribution mechanism of remaining oil and producing approaches, are great topics of development geologist. Although many experts domestic and abroad have carried out relevant study from outcrop, modern fluvial sediment and fine dissecting underground monosandstone, but, they haven't completely revealed control of internal architecture of the point bar to field of filtration and how distribution mechanism of remaining oil was affected so far.Which internal architecture of monosandstone have important controlling action to the heterogeneity of reservoirs, and remaining oil mainly distribute the middle and upper of reservoirs, because of the architecture of internal interlayer in space, the satiric change of permeability in single lateral bedding, the choking of 4-level interface and so on. By principles of deposition and hierarchy analysis theory, the architecture of the sand bodies was refined; the outcome of this text provided full geological references for exploration of remaining oil in the point bar of meandering stream channel and had geological direction to selection of producing methods.;It provided a guarantee for the efficient design of horizontal wells. At the same time, the outcome of this text can play an important role for further study of numerical simulation of the point bar reservoirs.