摘要
合成地震记录的精度直接影响到地震地质层位的准确标定。在总结前人工作的基础上,提出一套高精度合成地震记录的制作方法:①利用ＶＳＰ资料能准确地反映地震波在地层中传播速度的变化规律的优点,进行漂移校正,以提高深－时转换的精度;②利用密度测井资料与声波时差曲线联合计算反射系数序列,以提高反射系数序列的精度;③利用分时窗提取子波技术,解决长期以来合成地震记录中存在的子波问题。将此方法用于合成地震记录的制作,在提高合成地震记录与地震剖面的吻合度和分辨率方面,都取得了较好的效果。
Synthetic seismogram is an important ligament of seism and geology and its precision straightway affects the calibration of the seismic geologic horizon. The paper offers the producing method of synthetic seismogram of high precision on the base of predecessor's research: 1.Because VSP data can exactly describe the velocity of the wave in layers, we do drift correction using it to improve the precision of the time - deep change; 2.Using the seismic data and log information together, we improve the precision of the reflectance; 3.The paper advances the extractive method of seismic wavelet in different time window to solve the difficult wavelet problem. Also, the method is applied in synthetic seismogram and achieves good effect in two facts, improving the resolution power and the degree of fit seismic section.
出处
《世界地质》
CAS
CSCD
2001年第4期389-395,共7页
World Geology
关键词
合成地震记录
地震子波
子波提取
分辨率
高精度
synthetic seismogram
seismic wavelet
extraction of seismic wavelet
resolution power
