地层各向异性对随钻方位电阻率仪器测量信号的影响
发布时间：2018-07-15 07:04
【摘要】：随钻方位电阻率仪器在大斜度井、水平井中测量时会受到地层电阻率各向异性的严重影响。随钻方位电阻率仪器旋转测量时,可得到地质信号和各向异性信号。文章采用数值仿真方法计算地层各向异性对仪器测量信号的影响。计算结果表明,相位差地质信号会随着地层各向异性系数的增大而减小,而幅度衰减地质信号随着各向异性系数的增大而增大。两种地质信号均会随着相对倾角的增大而增大。相对倾角较大时,地质信号峰值对应地层界面的位置。在均匀地层,各向异性信号为零,在各向异性地层中,幅度比各向异性信号随着相对倾角、各向异性系数的增大而增大。
[Abstract]:While drilling the azimuth resistivity instrument in high inclination wells and horizontal wells will be seriously affected by the anisotropy of formation resistivity. Geological and anisotropic signals can be obtained when the resistivity instrument rotates with drilling azimuth. In this paper, numerical simulation method is used to calculate the influence of formation anisotropy on the measured signal. The results show that the phase difference geological signal will decrease with the increase of the anisotropy coefficient, while the amplitude attenuation geological signal will increase with the increase of the anisotropy coefficient. Both geological signals increase with the increase of relative dip angle. When the relative dip angle is large, the peak value of geological signal corresponds to the position of the stratigraphic interface. In homogeneous formation, the anisotropic signal is zero. In anisotropic formation, the amplitude ratio anisotropic signal increases with the increase of relative dip angle and anisotropy coefficient.
【作者单位】： 中海油田服务股份有限公司;
【分类号】：TE927
，
本文编号：2123212
[Abstract]:While drilling the azimuth resistivity instrument in high inclination wells and horizontal wells will be seriously affected by the anisotropy of formation resistivity. Geological and anisotropic signals can be obtained when the resistivity instrument rotates with drilling azimuth. In this paper, numerical simulation method is used to calculate the influence of formation anisotropy on the measured signal. The results show that the phase difference geological signal will decrease with the increase of the anisotropy coefficient, while the amplitude attenuation geological signal will increase with the increase of the anisotropy coefficient. Both geological signals increase with the increase of relative dip angle. When the relative dip angle is large, the peak value of geological signal corresponds to the position of the stratigraphic interface. In homogeneous formation, the anisotropic signal is zero. In anisotropic formation, the amplitude ratio anisotropic signal increases with the increase of relative dip angle and anisotropy coefficient.
【作者单位】： 中海油田服务股份有限公司;
【分类号】：TE927
，
本文编号：2123212
本文链接：https://www.wllwen.com/kejilunwen/shiyounenyuanlunwen/2123212.html
