场偏移 meaning in English

field offset

In the paper , in order to reveal the characters of seismic migration image affected by velocity model and improve the precision of seismic migration and imaging , we present some analysis to the complex geology conditions , through modeling and migrating the theoretical model , deduce some features of seismic wave field imaging affected by velocity model , and give some advises to improve the imaging and some useful idea
为了揭示速度模型对地震波场偏移成像的影响特征，提高偏移成像的精度，对一些复杂地质模型进行了波动方程正演和偏移，并从理论模型的数值模拟结果中，推导出了速度模型对地震波场偏移成像的一些影响特征，提出了相应的改进建议和一些有益的结论和认识。