应用测井曲线包罗面积指数法进行产能预测

Application of Envelope Size Method to Productivity Prediction

鄂尔多斯盆地三叠系长8油层组属于典型的超低渗透储层,储层具有孔隙结构复杂、非均质性强等特点,利用测井信息定量评价储层产能难度大。产能指数法受区域储层参数解释模型精度的限制。提出直接用岩性、物性和电性曲线的包罗面积指数定量计算单井产能的方法。该方法是在油水识别的基础上,利用单井投产前3个月的平均油产量与测井曲线包罗面积指数建立区域产能评价模型,并在同一区块用2种方法对比验证,测井曲线包罗面积指数法产能预测具有简捷、精度高的特点,对其他油田产能预测具有一定的借鉴意义。

The Chang 8 oil-bearing of the Triassic belongs to a typical ultra low permeability reservoir in Ordos basin, and quantitatively evaluating reservoir production capacity is difficult through logging information analysis because the characteristics of reservoir are complex pore structure and strong heterogeneity. Production capacity index method is limited by the precision of regional reservoir parameters interpretation models at present. This paper presents a method of quantitative calculation single well, which uses envelope size index of lithological, physical and electrical curve. This method is based on oil-water identification to build regional capacity evaluation model by single well average oil production and envelope size index curve in the first three months, and the result validated the envelope size index method of characteristics of productivity prediction is simple, high precise by using two methods on the same block. Therefore, This method has certain significance for other oil fields production forecast.