单砂体内部物性参数解释模型的建立方法研究

Study on the Establishment of the Physical Parameter Interpretation Model Inside Single Sand Body

单砂体形态及分布特征预测是精细油藏描述的主要内容,而砂体内部参数模型的建立是单砂体非均质性研究的最终目的。采用经验公式建立了泥质含量解释模型以及存在声波时差曲线情况下的孔隙度解释模型;通过从其他测井曲线出发,对已求取出孔隙度的井进行孔隙度与测井曲线相关性分析,选取相关性较大的参数进行回归,从而建立缺少声波时差曲线情况下的孔隙度解释模型;结合岩心资料、油田探井资料、通过线性回归建立了渗透率解释模型;建立了单砂体内部泥质含量、渗透率和孔隙度的物性参数解释模型。并与检查井原始参数值进行了物性参数解释模型的检验分析,得出物性参数解释模型的解释结果较为可靠、合理,误差均不超过15%。

The morphology and distribution of single sand body prediction is the main content of fine reservoir description,and the establishment of the inside sand parameters model is the final goal of the heterogeneity study for a single sand body.With the empirical formulas,this article established interpretation model of shale content and the porosity interpretation model when the acoustic curve is available.Correlation analysis is taken between the porosity and other logs for the well which porosity is already calculated,then the larger correlation parameters are chosen to make regression in order to establish the porosity interpretation model without acoustic curve.Combined the core data with the production data,permeability interpretation model is established with the method of linear regression;Furthermore,interpretation model of shale content,permeability and porosity inside the single sand is also obtained.With the verification between the original parameter and result of the parameter interpretation model in some well,the reliability of the parameters interpretation is proved,and the error is less than fifteen percent.