地震相控约束下的储层高精度定量预测方法--以曲塘次凹阜三上亚段为例

High precision quantitative reservoir prediction method controlled by seismic facies constraints--by taking the upper 3^(th) Funing formation in Qutang sub-sag

滩坝砂体空间分布非均质性较强、厚度薄,常规储层预测方法无法精细刻画其特征。针对该问题,采用主成分分析的地震相分析技术获取滩坝砂体空间展布变程、方向、规模等表征参数,将沉积模式和地震相引入地质统计学反演中进行变差函数的分析,在提高垂向分辨率的同时弱化随机反演井间结果的不确定性,最终实现对滩坝薄砂体的高精度定量预测。

As the beach bar sand body has strong heterogeneity and thin thickness,conventional reservoir prediction methods cannot accurately characterize its characteristics.Aiming at the problem,the seismic facies technology based on principal component analysis was used to obtain the parameters such as the space range,direction and scale of beach bar sand body.The sedimentary model and seismic facies are introduced into the analysis of variogram in geostatistical inversion.The research can improve the vertical resolution and weaken the uncertainty of the results between wells caused by stochastic inversion.Finally,the high-precision quantitative prediction of beach bar sand body is realized.