摘要
基于阵列声波测井资料的特点和声波在岩石中的传播规律,利用时频分析方法从阵列声波信息中提取了储层的主频、主频偏移等频域特征参数,并根据远、近波形的波至时间提取了时差信息。对不同油藏类型储层阵列声波资料进行了处理和统计分析,结果表明,所求取的声波时差能够较为准确地反映储层孔隙度的变化,主频、主频偏移等频域特征参数能够有效地描述岩性差别,且对储层流体的性质较为敏感。
Based on the characters of the array acoustic and the acoustic attenuation,the dominant frequency and the offset frequency for the reservoir is extracted from the data of array acoustic by means of utilization of the time-frequency analysis method.and then the slowness information may be filtered from the acoustic arrival of far and near wave.The process and statistic analysis on different reservoirs show that the calculated slowness may show the variation of porosity correctly,and the dominant frequency and the off-set of dominant frequency may play an important role in lithology recognition and fluid analysis.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第2期64-66,共3页
Petroleum Geology and Recovery Efficiency
基金
国家"863"计划资助项目"多尺度地球物理资料井地联合反演技术"(2007AA060504)
关键词
阵列声波
岩性识别
流体分析
特征参数提取
时频分析
主频
主频偏移
array acoustic
acoustic attenuation
time frequency analysis
dominant frequency
offset of dominant frequency
