松辽盆地北部宋芳屯地区垂直地震剖面速度与叠加速度关系研究

STUDY OF RELATION BETWEEN THE VSP VELOCITY AND THE STACK VELOCITY IN SONGFANGTUN AREA OF THE NORTH PART OF SONGLIAO BASIN

分析了ＶＳＰ速度校正叠加速度的方法——拟合速度比法，以提高叠加速度的精度。建立了阻尼正弦和多项式两种模型，对宋芳屯地区的ＶＳＰ速度和叠加速度进行了全井段和分层拟合，求出了本地区的８个校正公式。利用这８个校正公式校正叠加速度的最大相对误差均小于１．５％。

Analyzes the adjustment of stack velocity by VSP velocity, which is referred to as fitting velocity proportionality, to improve the precision of stack velocity, and have established the damped sinusdidal and the multi nomial models to fit both stack and VSP velocities by full well and the division layer in Sonfangtun area, and 8 correction formulations are derived. The biggest relative error is less than 1.5% when they are used to adjust the stack velocity.