摘要
储层含有油气等流体区域对地震波的吸收衰减比周围干层区域严重,地震剖面解释的精确度较低。应用粘弹介质体中的声波传播方程进行含流体储层的地震信号响应的数值模拟,得到储层合成地震记录剖面,应用复数道分析技术对地震记录进行瞬时参数与主参数的提取,重点分析各种瞬时参数对流体识别的敏感性。研究结果表明:主参数对流体识别的敏感性明显优越于瞬时参数。主参数对流体识别的敏感程度依次为:主相位最敏感,主振幅次之,主频率最差。主相位和主振幅在流体识别中将起到重要作用。
The seismic waves are absorbed and decayed more seriously in the reservoirs stratum which contain the oil and gas than the surrounding dry layer or rock ,and the precision of seismic profile interpretation is low. The acoustic equation in viscoelastic medium was applied to simulate the seismic records in the fluid reservoir,and the synthetic seismic recording profile was obtained. The instantaneous parameters and main parameters of seismic records were extracted using complex trace analysis, various instantaneous parameters on the sensitivity of the fluid recognition were analysed as the key. The results of the study show that the sensitive degree of main parameters are prior to instantaneous parameters. Main parameters on the sensitive degree of fluid recognition are as follows： main phase is the most sensitive, main amplitude is inferior, and main frequency is the worst. The main phase and main amplitude will play important roles on fluid identification.
出处
《中州煤炭》
2012年第8期31-34,共4页
Zhongzhou Coal
关键词
瞬时参数
流体识别
希尔伯特变换
正演模拟
粘弹介质
instantaneous parameters
fluid identification
Hilbert transform
forward modeling
viscoelastic medium
