【摘要】 在进行VSP三分量资料采集时,检波器垂直分量的方向一般为铅垂向下,而检波器水平分量的方向一般是随机的,通常利用两个水平分量来计算水平分量方位角和实现水平分量旋转。在斜井中进行VSP三分量资料采集时,如果检波器垂直分量方向沿着井轨迹方向,要获得地震记录的垂直分量、径向分量和切向分量,必须对三个分量进行坐标旋转,此时计算检波器水平分量方位角也需要利用三个分量。本文首先推导出了斜井三分量检波器坐标系与旋转后坐标系之间的关系,得到了斜井VSP三分量旋转公式;然后给出了斜井零井源距、非零井源距VSP检波器水平分量方位角计算方法;最后针对实际斜井零井源距VSP资料和斜井三维VSP资料,计算了检波器水平分量方位角,并进行了三分量旋转定向,结果表明了文中方法的有效性。更多还原

【Abstract】 When carrying out 3-C VSP data acquisition,the direction of vertical component of geophone is generally vertically downward and the direction of its horizontal components is generally random,by which the azimuths and rotation of horizontal components are computed and implemented.When carrying out the 3-C VSP data acquisition in incline well,if the vertical component of geophone is along the well trail,it should carry out coordinate rotation of three components to obtain the vertical,radian and transverse components of seismic records,and computation of azimuths of horizontal components in geophone also needs to use these three components in this time.The paper firstly deduced the relationship between the coordinate of 3-C geophone in incline well and that after rotation,obtaining the rotation formula of 3-C VSP geophone in incline well; then the computational method azimuths of horizontal components in geophone of zero-offset and non-zero-offset VSP is given; finally,in view of practical zero-offset VSP data and 3-D VSP data in incline well,the azimuths of horizontal components in geophone are computed,and 3-C rotation orientation is carried out,which showed the effectiveness of the method presented in the paper.更多还原