鄂尔多斯盆地延长组超低渗透砂岩储层油井产能影响因素分析

Analysis of the factors influencing the oil well productivity of the unltra-low permeability sandstone reservoir in Yanchang Formation of Ordos Basin

为了准确预测超低渗透油藏的油井产能,必须认识清楚油井产能的影响因素.根据鄂尔多斯盆地延长组超低渗透砂岩储层的油井产能与地层单因素参数间的相关性统计分析,影响这类储层油井产能的因素不仅包含油层厚度和地层渗透率,还包括储层孔隙性、电性等多个因素.由多参数确定的油井产能预测模型将存在更加复杂的结构表达式,实际产能预测问题应是一个非线性系统问题.

Through the analysis and statistics of the correlation between oil well productivity of the unltra-low permeability sandstone reservoir in Yanchang Formation of Ordos Basin and the single-factor parameters of strata,it is held that the factors influencing oil well productivity of the reservoir include not only reservoir thickness and formation permeability,but also reservoir porosity,reservoir electric property and other elements which can't be ignored.So,the oil well productivity forecasting model determined by multi-parameter should be some more complex expression,and the actual productivity prediction problem must also be a nonlinear system.