南堡油田低井控区主力油组岩相模拟研究

The Simulation of Main Oil Formation Lithofacies of Low Well-control Area of Nanpu Oilfield

在对井控程度不同却有类似沉积环境的油藏进行类比研究的基础上,通过储层参数统计分析,建立类似储层岩相知识库。利用综合了基于象元方法以及基于目标方法两者优点的多点地质统计学方法,建立了南堡油田馆2油层组辫状河岩相模型。研究结果表明,在地质规律约束下,以露头资料和井控程度较高井网区储集层地质知识库所得到的砂体规模形态参数作为重要约束条件,对于河流相等具有复杂地质形态的储层岩相精确建模,该方法比传统方法更有优势,模拟结果与理论及实际模型有好的接近性,可以给出较好的储层岩相模型。

On the basis of analogy research on the reservoirs with different levels of well controls but with similar sedimentary environment and by means of reservoir parameter statistical analysis,a knowledge base of similar reservoir lithofacies was established.A multi-point geostatistic method based on the advantage of image element method and object method was used to build a braided channel lithofacies model of Guan 2 Oil Formation in Nanpu Oilfield.The result of research indicates that in the constrain of geologic regulation,sand body scale and morphologic parameters obtained from the outcrop data and well network area with higher level of well control in the knowledge base are used as the important constraining condition for building accurate lithofacies model of fluvial facies with complex geology morphologic rock facies,this method has more advantages than traditional one and the simulated result has a good concordance with theory and practice model,it can give a preferable rock lithofacies model.