摘要
根据指示条件模拟的基本原理，提出了建立渗透率空间分布模型的三维指示条件模拟方法。条件模拟是一种非参数 模拟方法。同转向带法等其它高斯模拟方法相比，它不要求模拟变量符合特定的概率分布模型，这在模拟象渗透率这样具 有奇异值的参数时非常有效。该方法在松辽盆地大庆长垣北部喇嘛甸油田北实验区进行了实际应用。在进行不同流动单 元三维渗透率分布模拟时，首先从油田开发数据库中提取相关的数据，然后用井模型将渗透率值转化为指示值，得到在井 中连续分布的渗透率剖面。根据各井中连续分布的指示值计算出不同渗透率等级的指示变异函数，并用指数函数进行最 优拟合，最后用指示条件模拟方法计算出萨尔图、葡萄花和高台子油层渗透率指示值的三维数据体和不同等级渗透率岩 石的厚度分布。研究结果不仅可以作为油藏数值模拟的输入，在预测剩余油分布时也可以作为重要的参考信息。
Based upon the theories of conditional indicator simulation,an approach for predicting the distribution of rocks with different permeability categories is presented. The conditional indicator simulation is a non-parameter simulating method. Compared with other Guassian simulation methods such as Turning Band Algorithm,it does not require the simulated variables having a predetermined probability distribution model,which is very useful in simulation of variables with outliners. The approach is applied to the northern testing area of Lamadian oilfield,the north part of Daqing placanticline in the Songliao Basin. The data used in the modeling of permeability in three dimensions for different flowing units are extracted from the database of development wells in Daqing oilfields. The permeability is first converted into indicators,and the indicator logs in all wells are calculated by interpretation. The indicator variograms for different permeability categories are modeled with the exponent functions from the indicator logs in wells. 3-D data volume of indicators for permeability and thickness for different permeability categories in Saertu,Putaohua and Gaotaizi oil-bearing formations are calculated by the conditional indicator simulation. The results of modeling can be used as input to reservoir simulators and as important information to predict the distribution of residual oil in the research area.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2000年第3期61-65,共5页
Acta Petrolei Sinica
关键词
建模
模拟
渗透率
三维模型
储集层
reservoir modeling
conditional simulations permeability
3-D model
