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文章以牛居油田牛12断块东营组为例,储层存在严重的非均质性,层间渗透率级差高,层间矛盾突出,并已在特高含水期。为提高采收率,延缓断块递减趋势,控制含水上升速度,进而达到稳产目的,提高整体水驱油效率。有必要对作为含油目的层的东营组加以分析,结合该区块70口井的地质资料,利用储层“四性”对该该区块进行测井解释分析,确定了划分油层的标准层,同时总结了水淹判别方法,为剩余油的开发提供了有力的依据。
Taking the Dongying Formation of Niu 12 fault block in Niuju Oilfield as an example, the reservoir is characterized by serious heterogeneity, high level difference of interlayer permeability and prominent contradiction between layers, and has been in the period of ultra-high water cut. In order to improve oil recovery, slow down the trend of decreasing blocks, control the rate of increase of water-bearing, so as to achieve the goal of stable production and improve the overall water-flooding efficiency. It is necessary to analyze the Dongying Formation, which is the oil-bearing target layer, and combine the geological data of 70 wells in the block with the reservoir “four characters ” to log interpretation and analysis of the block and determine the standard for dividing the oil layer At the same time, the method of waterflooding is summarized, which provides a strong basis for the development of remaining oil.