井间层析成像质量影响因素分析

The analysis of influence factors related to cross-well tomographic imaging quality

地矿部石油物探研究所, 南京210014

Research Institute of Geophysical Prospeeting for Petroleum Nanjing 210014

本文利用一些典型数学模型的井间层析成像结果,较为深入地讨论了井间层析成像质量的影响因素,加射线密度、射线有限视角、初至误差(包括初至随机误差和系统误差)、速度差异和射线弯曲等。在此基础上,提出了一些克服上述影响因素的具体建议,这对于井间层析成像以及指导野外施工,都具有重要的意义。

Through the cross-well tomographic imaging results of some typical mathematical models wego comparatively deep into influence factors relatod to cross-well tomographic imaging quality,such as ray density, ray limited visual angle. first arrival error (including first arrival randomcrror and first arrival systematic crror), velocity contrast and ray winding, Practical measures areprescnted to overcome the abovc influence factors which are very important to cross-welltomographic imaging and to guiding field work.