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储层流动单元指的是连通体内具有相似岩性和物性特征的储集单元,而储层的非均质性则表现为不同流动单元之间岩性和物性的差异性。因此,利用表征储层岩性和物性特征的流动层带指标、孔隙度、渗透率和泥质含量等参数对储层流动单元进行定量评价,可以更好地了解地下油水运动规律以及油田注水开发过程中剩余油的分布。在马岭油田中一区开展了储层流动单元的划分和剩余油分布的研究。首先选择马岭油田中一区的4口井作为关键井,利用4口关键井的岩心分析资料和测井资料,计算和提取了流动层带指标和孔隙度、渗透率、泥质含量等参数,进行了聚类分析,并参照油田实际开发情况,确定了该区主力油层延安组储层流动单元的划分标准,即将延安组储层流动单元定义为4类,Ⅰ类的储集性能最好,Ⅳ类的储集性能最差。然后,采用神经网络技术,根据延安组储层流动单元的划分标准。对延安组的延_9~(2+3)、延_(10)~2、延_(10)~2、延_(10)~3和延_(10)~4等5个油层组进行了储层流动单元平面分布预测,并结合实际地质和生产状况,对各类流动单元的主要特征进行了分析,研究了流动单元与储层吸水、产液和剩余油分布之间的关系。研究结果表明．Ⅰ类和Ⅱ类流动单元区储集性能好,虽然开发程度高,但仍然是油田目前剩余油分布的主要区域,是油田挖潜的主要目标。
Reservoir flow units refer to reservoirs with similar lithologic and physical characteristics in a connected body, while reservoir heterogeneities are characterized by differences in lithology and physical properties between different flow units. Therefore, the quantitative evaluation of reservoir flow units can be carried out by using the parameters of the fluid zone index, porosity, permeability and shale content that characterize reservoir lithology and physical properties to better understand the underground oil-water movement law and the development of oilfield waterflooding The remaining oil in the process of distribution. In the Maling-1 area of Maling Oilfield, a study has been conducted on the division of flow units and the distribution of remaining oil. Firstly, four wells in Zhongyi district of Maling oilfield were chosen as the key wells. Based on the core analysis data and well logging data of four key wells, the parameters of flow strata index, porosity, permeability and shale content were calculated and extracted , And carried out cluster analysis. With reference to the actual development of the oilfield, the division standard of flow units in the Yan’an Formation of the main oil reservoir in this area was defined. That is to say, the flow units in the Yan’an Formation are defined as Class 4 and Class I , Ⅳ type of the worst storage performance. Then, using neural network technology, according to Yan’an reservoir flow unit division criteria. The study shows that there are 5 oil layer groups in Yan’an Formation such as Yanchang Formation, Yanchang Formation and Yan’an Formation. Based on the actual geology and production status, the main characteristics of all kinds of flow units are analyzed. The relationship between flow units and reservoir water absorption, liquid production and remaining oil distribution is studied. Research indicates. Class I and II flow units have good reservoir performance. Although their development level is high, they are still the main areas for the remaining oil distribution in oilfields and are the major targets for tapping potential in oil fields.