关键词: 裂缝性储层建模, DFN离散裂缝网络模型, 裂缝密度, 地震属性, 裂缝尺度

Abstract: According to the problem of the fractured reservoir modeling, an approach of Discrete Fracture Network (DFN) model of fractured reservoir is discussed. The proposal of the DFN fracture model is built by dividing into the large and small-mid scales of fracture. Firstly, with the deterministic modeling method, the large scale of fracture model is built with the 3D seismic data. Secondly, based on the well fracture density, length, dip and azimuth, which are calculated from well core observation and image log calibrations, using the prediction of fracture from the seismic attribute volume as constraints, the whole area fracture density distribution model is built. And then, taking the fracture density model as constraints and using the stochastic modeling method, the small-mid scale of fracture model is generated from fracture density model. The constraint for inter well fracture density is realized. Finally, integrated with the large and small-mid scales of the DFN models, the comprehensive discrete fracture network fracture model and the models of fracture porosity and permeability are established in Z Area. This model reflects the characteristics of reservoir fracture in three-dimensional space, which provides the foundation of geological for the numerical reservoir simulation in Z Area.

Key words: fracture modeling, discrete fracture network model, fracture density, seismic attributes, fracture scale