Effect Evaluation Of Water Flooding Development In Xinjiang Conglomerate Reservoir

At present, Xinjiang oilfield have found97conglomerate reservoirs with total proven reserves6.67×108t, accounting for51.1%of the total reserves of the Xinjiang Oilfield Company, in the Junggar Basin, where is the largest distribution area of conglomerate reservoir in the world. Like sandstone reservoir, the mainly exploitation mode for conglomerate reservoirs is water-flooding development. As the result of serious heterogeneity, rapid facies change and Small interval layer development, compared with the sandstone reservoir, underground conflicts become more outstanding when the water content rises. In order to fulfill the goal of economic, rational and efficient development in conglomerate reservoirs of Xinjiang oilfield, objective and correct evaluation system of the development has important practical significance.For Xinjiang conglomerate reservoir geological features, using reservoir engineering, fluid mechanics in porous, fuzzy mathematics and other theoretical tools, this paper has thoroughly studied its theories and methods of water-flooding effectiveness and has obtained corresponding results:Firstly, drawing on relative geological parameters of the various kinds of conglomerate reservoirs and learning from various principles and methods of classification, the paper divided97Xinjiang conglomerate reservoirs into three categories and seven sub-categories, which provides the geological basis for the classification for evaluating the effect of the development. Secondly, thesis established a set of technologies with evaluation index system, Calculation method, comprehensive evaluation methods, which provides the theoretical basis for evaluating the effect of the development.Thirdly, according to statistical regularity of development indexes and Statistics of development effect index of Xinjiang conglomerate reservoir, established evaluation criteria of key indicators. At last, the evaluation of six typical conglomerate reservoir proved that the evaluation index system and evaluation standard has a good applicability.