基于离散裂缝网络模型的储层裂缝建模

Modeling of reservoir fractures based on discrete fracture network

应用测井和地震资料分析储层裂缝在三维空间上的分布形态.首先对微电阻率成像测井EMI资料处理,人工识别出天然张开裂缝,计算裂缝的密度、长度、宽度、倾角、方位等参数,并生成LAS格式的数据;然后以GoCAD为软件平台,依据离散裂缝网络模型DFN原理,综合运用裂缝定量数据、测井数据和地震资料,建立普光气田碳酸盐岩储层裂缝地质模型.该模型客观地反映了储层裂缝的几何特征和分布形态,可为后续气藏数值模拟提供依据.

Well logging and seismic data are utilized to analyze the distribution of reservoir fractures in three-dimensional space.First,we identify natural fractures and calculate quantitative fracture parameters such as density,length,width,dip angle and strike after processing EMI data,and output them in LAS format which will be used in geological modeling.Then by making use of fracture parameters,well logging and seismic data,fracture model of carbonate reservoirs can be built up according to discrete fracture network theory on GoCAD software platform.This model not only precisely displays the geometrical features and distribution of fractures,but also serves as a base for subsequent numerical simulation.