Seven Districts Gudong Oilfield West 6 (3 +4) Unit Remaining Oil Layer Segmented Injection Tapping The Potential

The 63+4 unit in the west of the seventh district are river deposit sand reservoir in Gudong oil field. The sands are distribution in plane and connectivity. The reservoir of sand are heterogeneous because the river energy change and the riverbed transferred. This paper analysed the character of sedimentary and microcosmic or macroscopical reservoir heterogeneous, the affusion b thick different oil floors have good effects because interlayer of reservoir are continuous. When we deal with data dynamically, there are many methods that include mainly numerical simulation ,and others such as petroleum reservoir engineering .streamline model, dynamically monitoring in subsidiary. These methods can be used to research pack flat, intrastratal characteristic of water flooding and distribution feature of remained oil. In the end we conclude the macro-thought and micro-thought regularity of remained oil distribution. However we can reveal the variance of the nonhomogeneity inside layers, especially effect that sandwich distribution controls regularity that oil and water move between sedimentary unit. In compounding rhythm and positive rhythm oil layers, it is very evidence that displacement efficiency of oil by water subsection diversity which sandwich causes inside layers. In my analysis ,1 consider that we should improve potential of exploitation remained oil inside layers of unit mainly. Our emphasis is that through adjust the section of water absorption and oil production, improve the potential that exploitation oil from low osmosis and low water flooding sections in compounding rhythm and positive rhythm oil layers. It is necessary that we implement water injection in subsection inside layers. By means of these methods, we do some experiment in 7-30-4326 phreatic, and get the satisfactory effect. Finally we achieve the goal of enlarging thickness conformance factor inside layers and improving development effects.