地震反演、地质协同约束储层精细建模研究

Integrated Reservoir Modeling Based on Seismic Inversion and Geological Data

针对强非均质油藏,需要综合运用多尺度信息来进行精细描述,以提高井间及外围预测模型的精度和确定性。以红柳泉地区E13油藏为例,分别探讨了单纯变差函数、相控、地震属性体约束建模的优、缺点,确定了多信息协同约束综合建模的研究思路。以测井相为井点数据,以反演砂体厚度图为平面约束,刻画沉积微相的平面展布;同时以测井解释数据为硬数据,采用沉积微相控制、地震反演协同体约束建立储层的泥质含量模型,进一步利用阈值离散化得到岩相模型。多信息协同约束综合建模利用了地震资料横向连续性好,测井资料纵向分辨率高,沉积微相反映地质沉积规律等优点,弥补了变差函数多解性强、地震数据纵向分辨率低、井间预测对数据密度要求苛刻、相控模拟沉积模式化严重等缺陷,在实际应用中取得了较好的预测效果,可作为解决储层表征难题的重要策略。

Aiming at the fine reservoir characterization of strong non-homogeneity,multi-scale information should be integrated to improve the model＇s accuracy and certainty of inter-well and periphery.Taking Hongliuquan oilfield as an example,we explored merits and drawbacks of variation function analytic,sedimentary microfacies-controlled and seismic attribute body constraint modeling and determined research approach of multi-information integrated modeling.With the constraints of sandstone thickness by seismic inversion,the microfacies planar distribution is characterized by using electro-facies as well point data.Based on well-logging,we built the V-shale model with sedimentary microfacies and seismic inversion collaborative constrain,and then discretized it into lithofacies model by a threshold.This method took advantages of seismic data with lateral continuity,well logging data with high vertical resolution,geological depositional patterns of microfacies etc.,and made up the disadvantage of the inter-well multi-solution by variogram function,low vertical resolution of seismic data,the demanding data density in inter-well prediction,patternized sedimentary model.Good prediction effect is obtained in practical application.So this research can be used as an important strategy for reservoir description.