基于随机介质模型的储层非均质性分析

本文利用随机介质模型对复杂岩性储层进行了非均质性描述.利用模型特征量即非均质纵横比、纵向谱指数、横向谱指数以及扰动标准差等来模拟不同的随机介质.在前人工作的基础上,由某油气田的两口井资料估计储层非均质性能谱,从能谱曲线上提取储层纵向大小尺度非均质谱指数.通过将二维随机介质模拟的合成井记录互相关系数与实际井记录互相关系数进行分析比较,分别得到大小尺度非均质情况下最佳拟合时的横向谱指数和非均质性纵横比.以上求得的各种特征量从不同角度定量分析了储层非均质性的纵横向变化,为储层横向预测提供了依据.

Analysis of reservoir heterogeneity based on random media models

This paper describes the complex reservoir heterogeneity using random media models.Random media are generated with different model characteristics which are heterogeneity aspect ratio,vertical spectral exponent,horizontal spectral exponent and fluctuation standard deviation.Based on the analysis of Ru-Shan Wu et.al,reservoir heterogeneity spectra are obtained by using records of two wells of on oil-gas field.Vertical spectral exponents of large-scale and small-scale heterogeneities are gained from the power spectrum curves.We estimate the horizontal spectral exponents and heterogeneity aspect ratios of large-scale and small-scale heterogeneities along with the best fit by comparing the cross-correlation coefficients of two-dimensional random medium simulation logs and that of the two holes.Heterogeneity aspect variations are analysed quantitatively from different aspects using varied characteristics,and lay a foundation for reservoir lateral prediction.