柴达木盆地砂砾岩油藏储层有效性评价及应用

Effective Gravel-rock Reservoir Evaluation in Qaidam Basin and Its Application

结合柴达木盆地某油田第三系路乐河组砂砾岩储层的特点,综合分析了影响储层品质的各种因素,优选泥质和碳酸盐含量、流动孔喉中值半径、孔隙度、渗透率和束缚水饱和度作为储层有效性评价的特征参数,结合生产资料建立储层有效性评价分类标准,采用K-means聚类方法将储层有效性分四大类,以生产资料为依据,通过对比分析判别准确率,建立储层有效性分类评价模式,实践应用证明,对研究区储层有效性分类能够达到产能分级,提高了储层有效性识别精度,应用效果良好。

According to the characteristics of the gravel rock reservior of Lulehe formation in the third Department in an oilfield of the Qaidam Basin, the factors affecting the reservoir quality are studied completely. The percent content of clay and carbonate, flowable pore-throat radius, porosity, permeability and bound water saturation is used as the characteristic parameter of effective reservoir evaluation to build the criteria of reservoir effective evaluation combining with the production data. The effective reservoir will be divided into four types by the K-means clustering method, and the accuracy rate is distinguished by comparison and discriminant analysis with the production data. The production practice proves that the research on reservoir classification effectiveness can reach capacity grading, and the accuracy of effective reservoir recognition is improved to achieve good results.