Lambda函数法计算储层含水饱和度
发布时间:2018-01-25 03:11
本文关键词: 测井解释 Lambda函数 储层分类 毛细管压力曲线 含水饱和度 出处:《测井技术》2016年04期 论文类型:期刊论文
【摘要】:A油田岩石孔隙结构复杂多样,储层物性变化较大,相应压汞毛细管压力曲线亦表现为不同类型形态特征,在进行压汞资料含水饱和度评价时,将其合理分类会取得更好效果。利用Lambda函数构建毛细管压力曲线评价储层含水饱和度时,函数公式各项参数可以反映出毛细管压力曲线变化趋势,其值大小在一定程度上指示了样品品质,可进行样品的分类划分。应用这种新的分类方法将A油田压汞样品划分为2类,对每一类根据Lambda函数公式构建出压汞资料评价储层含水饱和度的模型,利用模型计算密闭取心井储层含水饱和度,计算结果与岩心分析含水饱和度对比,平均绝对误差5.1%。
[Abstract]:The pore structure of rock in A oilfield is complex and varied, and the reservoir physical properties change greatly. The corresponding capillary pressure curve of mercury injection also shows different types of morphological characteristics, when evaluating the water saturation of mercury injection data. When using Lambda function to construct capillary pressure curve to evaluate reservoir water saturation, the parameters of function formula can reflect the change trend of capillary pressure curve. The value indicates the quality of samples to some extent and can be classified into two categories. For each model based on Lambda function formula to evaluate reservoir water saturation with mercury pressure data, the model is used to calculate water saturation in closed core well reservoir. The calculated results are compared with the water saturation of core analysis, and the average absolute error is 5.1.
【作者单位】: 大庆油田有限责任公司勘探开发研究院;
【分类号】:TE31
【正文快照】: 0引言油藏的含水饱和度是自由水界面上的高度和孔隙类型的函数[1],常用压汞法获得毛细管压力曲线计算储层含油(气)饱和度[2-3],方法为沃尔法和油柱高度法。沃尔法获得的饱和度值为油藏的平均原始含水饱和度[4],这种方法不能进行储层连续计算。对构造油藏,为能实现利用毛细管压,
本文编号:1461823
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