储层相对稳定性及其在储层模拟中的应用

储层相对稳定性是以一定的表征尺度为基础,储层参数在给定的空间(或时间)变程内的变化量是变程的函数.这是沉积储层所普遍具有的特征.储层相对稳定性提供了一种综合测井、地震、地质资料进行定量储层模拟的新途径,它能同时在一定程度上保持井的高垂向分辨率和地震的高横向分辨率信息,从而提高模型的表征精度.将储层相对稳定性作为储层横向变化的约束条件,并与地震随机反演相结合用于定量储层模拟研究,结果表明该方法能显著提高储层横向预测的精度和外推合理性.

CONCEPT OF RELATIVE RESERVOIR STABILITY AND ITS APPLICATION TO RESERVOIR SIMULA-TION

Relative reservoir stability (RRS) is defined as that the variation of reservoir parameter is a function of given space (or time) range,taking a certain scale of reservoir characterization as a basis.Relative reservoir stability,such as lateral continuity,is a common attribute of almost all sedimentary reservoirs.It can provide a new method to quantitative reservoir simulation by incorporating well logging,seismic,and geological data.The resolution of reservoir model is improved by both maintaining high resolution information of vertical well data and that of lateral well data of seismic data.RRS is used as a constraint of reservoir lateral variation in simulation,and can be integrated with stochastic seismic inversion method for interwell parameter simulation.Application examples provided in the paper indicate that RRS can improve forecasting precision significantly.