断裂带结构单元特征及其测井识别方法研究

On Features and Logging Recognition Method of Structure Unit in Fracture Belt

断裂带内部诱导裂缝带和滑动破碎带等内部结构单元的准确划分对于油气成藏过程中的疏导体系研究具有重要意义。利用岩心等资料进行标定,系统总结了断裂带不同结构单元常规测井资料和成像测井资料的响应特征。电成像测井和地层倾角分析资料可以有效进行断层结构的识别,通过提取声波时差、电阻率差比、电阻率变化率、声波变化率、密度变化率和井径增大率等裂缝指示曲线,在对研究区指示曲线进行分析优选的基础上,结合主成分分析可以很好地识别断裂带内部结构单元。实际应用取得了良好效果。

The accurate subdivision of fracture belt internal structure units such as internal induced fracture zone and slipping fractured zone has important influence on research of translocation system of oil and gas accumulation process. Based on core calibration, the conventional logging data and imaging logging data response characters of fracture belt different structure units are summarized systematically. The electric imaging logging and formation dip data may effectively identify the fracture belts. Fracture index curves are extracted such as the sonic interval transit time, change rate of density, resistivity, acoustic travel time and caliper increment, etc. Based on optimizing the index curves, the composite curve indicating characteristics of fault structure are extracted by using principal component analysis method, and resistivity imaging logging data is united to subdivide the internal structure unit of fracture, the result of which shows that＇s a good method in the practical application.