鄂尔多斯盆地直罗探区长8~1孔隙度建模方法的探讨

Study on porosity modeling method of chang8~1 hypo-oil layer group in Zhiluo exploration area in the Ordos Basin

用Petrel软件可以选择多种方法进行井间内插和井外推测来建立储层地质模型。以直罗探区长81为例,选用随机建模、相控建模、趋势面约束建模三种方法分别建立孔隙度模型。相互比较后认为趋势面约束法建模保证了孔隙度模型与孔隙度平面图的匹配关系,无论在平面还是剖面上都表现出了数据的随机分布特征与储层分布的非均质性。因此,本工区使用该方法做的模型效果最好。

Many methods can be chosen to interpolate between wells and extrapolate outside of well for building a geologic model by using Petrel software.Porosity models of chang 8~1 hypo-oil layer group in Zhiluo exploration area were respectively established by using stochastic modeling,facies-controlled modeling and trend surface constraint modeling.Finally,by compared with experimental results,the trend surface constraint modeling method can ensure the porosity model to match with ichnography of porosity,and there are stochastic distribution of data and heterogeneity of the reservoir distribution both in plan or profile.Therefore,the best performance of the porosity model can be achieved by using the trend surface constraint modeling method in this research area.