马岭油田中一区储层流动单元研究

正确划分储层的流动单元可以深化对储层非均质性的认识,对预测剩余油分布、调整开发方案、提高采收率都具有重要意义.根据流动层带指标、孔隙度、渗透率、泥质含量以及粒度中值等参数,采用神经网络模型,将马岭油田中一区砂岩储层定量划分为4类流动单元;利用该区314口井的测井精细解释成果,研究了延安组Y9,Y10砂岩储层5个油层组连通体的流动单元平面展布状况;结合该地区的实际地质和生产状况,研究了各类流动单元的主要特征;分析了流动单元与储层吸水、产液以及剩余油分布之间的关系.指出流动单元Ⅰ,Ⅱ区仍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.

Division of the reservoir flow units of Zhong- 1 block in Maling Oilfield

The correct division of the flow units of a reservoir can deepen the understanding of its heterogeneity,and it is important to predicting residual oil distribution,adjusting the development plan and enhancing recovery factor.The sandstone reservoir of Y9 andY10 in Zhong-1 block is divided into four types of flow units by means of gray system theory based on the reservoir parameters such as flow zone indicator,porosity,permeability,shale content,grain-size median,etc;the plane distribution of the flow units of five interconnected sandstone formations of Y9 and Y10 is obtained based on the fine logging interpretation of 314 wells in the area;the main characteristics of the four types of flow units are discussed on the basis of the actual geological property and production situation in the area;the relationships between reservoir flow units and reservoir absorbability,liquid yield and remaining oil distribution are also analyzed.It is pointed that the zones of ⅠandⅡtypes of flow units are the enrichment zones of remaining oil and they are the main targets of the oilfield tapping potentiality.