喇嘛甸油田北北块河流相储层流动单元划分

Classification of fluvial reservoir flow unit in the north part of the north section in Lamodian Oil Field

我国东部许多老油田已进入高含水期开采阶段,为了搞清剩余油分布规律,必须加强储层非均质性研究,流动单元划分是储层非均质性研究的深入.从垂向和横向划分流动单元,垂向划分精细到单砂层级,使对储层的认识更加清晰;横向划分利用综合系数法,选用相关参数,并结合岩心得到非取心井流动单元划分的定量标准,得出流动单元与沉积微相的关系.提出流动单元分布为独立分布型、平面联合型、垂向复合型3种基本类型,总结了各类流动单元在研究区的分布.现场剩余油控潜实践验证了流动单元划分的正确性.

Many old reservoirs in the east of China have entered the high water-bearing development period. In order to grasp the law of residual oil distribution, strengthening reservoir heterogeneity is necessary, and classification of flow unit is a further step in the study of reservoir heterogeneity. The paper puts forward classification method of vertical and plain flow units, vertical flow unit classification is fine to one sheet of sand, by which we understand reservoir well. Plain flow unit is classified by integrated coefficient method, the paper gets the criterion of not getting core wells with relative parameters and core, and finds the relation of sedimentary microfacies and flow unit. The paper first puts forward three types of plane flow unit distribution, they are isolated distribution type, plane combination type, profile compound type, and it also summarizes distribution law of flow unit in the target pay zone. Lastly the paper validates the classification of flow unit by practice, by means of which the conclusion is arrived at..