摘要
针对岩心实验成本高、非均质差异及数据量有限,难以大范围获取及使用相渗数据的难题,根据黄河口凹陷相渗实验数据特征,通过对数据归一化处理,引入反映储层孔隙结构差异的特征指数λ对归一化数据进行特征值提取,通过特征指数消除孔隙结构差异等因素,使得不同相渗曲线变化规律趋于一致,进而拟合相对渗透率与含水饱和度之间关系,构建出黄河口凹陷相渗曲线。结果表明,特征指数λ与束缚水饱和度具有很好的相关性,构建的油、水相渗曲线与黄河口凹陷实验数据吻合度较高。在缺少相渗实验数据时,该方法可以作为估算油水相对渗透率的有效方法。
Because of high core experiment cost,core heterogeneity difference and limited core experiment data,it is difficult to obtain and use a wide range of relative permeability data. For this reason,taking Huanghekou Sag as an example,a construction method of relative permeability curve was presented. The relative permeability experiment data are normalized,the features of the normalized data are extracted by introducing the characteristic indexλreflecting reservoir pore structure difference,and the relationship between relative permeability curve and water saturation can be fitted. Introducing the characteristic indexλ is for eliminating the difference in reservoir pore structure and makes the variation laws of different relative permeability curves tend consistent. The result shows that there is a good correlation betweenλ and irreducible water saturation,the relative permeability curve of Huanghekou Sag obtained using the method has high coincidence degree with core experiment data. This method can be used as an effective method to estimate the oil/water relative permeability in the absence of relative permeability data.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2017年第2期59-63,共5页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家科技重大专项"海上大井距多层合采复杂水淹层测井定量解释和评价技术研究及应用"(2011ZX05057-001-002)
关键词
相渗曲线
黄河口凹陷
特征指数λ
自由流体饱和度
比采油指数
relative permeability curve
Huanghekou Sag
characteristic index λ
free fluid saturation
specific productivity index
