水平井网状裂缝储层双侧向响应特性研究  

Characteristics of dual laterolog response of net-fracture reservoirs in horizontal well

作　　者：王小明[1] 万文春 赵建武 周丽艳 

机构地区：[1]中石油华北油田分公司勘探开发研究院,河北任丘062552 [2]中石油长庆油田分公司第五采油厂,陕西榆林718600 [3]中国石油集团测井有限公司评价中心,陕西西安710201

出　　处：《物探与化探》2014年第6期1218-1221,共4页Geophysical and Geochemical Exploration

基　　金：国家重点基础研究发展项目(2007CB209607)

摘　　要：网状裂缝型储层具有良好的油气储集能力且广泛存在。双侧向测井能够有效地识别裂缝。采用三维有限元素法对水平井网状裂缝型储层的双侧向响应进行数值模拟,并重点对网状裂缝中流体电阻率、基岩电阻率及裂缝倾角等因素变化所引起的响应特性进行了研究。数值结果分析表明,随着裂缝中流体电阻率增加,视电阻率值相应增加,但增加幅度不大;随着基岩电阻率的增加,视电阻也会随着增加,当基岩电阻率较小时,基岩电阻率的影响会降低;两组裂缝为低角度裂缝时,形成的网状裂缝对电流的阻碍能力较强。所得结论可为水平井网状裂缝型储层测井评价提供理论参考。The widespread net-shaped fracture reservoirs have good reservoir capacity. The dual laterolog can recognize fractures effectively. The dual laterolog logging response within the net-shaped fracture reservoir was simulated through the 3-D finite element method, with emphasis placed on the influence of logging response such as fluid resistivity, bedrock resistivity and fracture dip. The results show that the apparent resistivity increases with the increasing fluid resistivity in the fracture, but the rate is pretty small. The apparent resistivity increases with the increasing bedrock resistivity, but this kind of influence will decrease when the bedrock resistivity is very small. The net-shaped fractures formed by the low angle fractures often hinder current strongly. The conclusions above can provide theoretical reference for the horizontal well bore logging evaluation with the net-shaped fracture reservoir.

关 键 词：油气勘探 双侧向测井 水平井 网状裂缝 数值模拟 储层评价 

分 类 号：P631[天文地球—地质矿产勘探]