Abstract：When 3D seismic exploration is carried out in urban districts,if designed shot-points are near the buildings,the safety problem of buildings always exists in some degree whether using dynamite source or vibroseis.Therefore,there is often devia-tion of the positions of some designed shot-points in geometry from the practically used positions in field production,which brings a lot of troubles in seismic data processing.In order to solve this prob-lem,the paper presented using synthetic regional first break time-distance template of shot records for correction of shot-points offset faced with the character of more stable near-surface velocity in the east of China.The method first draws first break travel-times of some normal shot and receiv-er points (coordinate positions of shot and receiver coincide with recorded positions in log book of field production ) as synthetic regional offsets-first break travel-times template,then uses the numeric relationship between offsets and first break travel-times to look for real positions of shot-points off-sets,which reaches the goal of correction of shot-points offsets.The results of practical seismic data processing showed that the method can accurately finish the correction of total shot-points offsets on its first operation and has popular adaptability for the correction of shot-points offsets in land seismic exploration of the east of China.
蔡加铭, 刘永红, 曹孟起, 王强. 兴隆台城区三维炮点偏移校正技术[J]. 石油地球物理勘探, 2005, 40(2): 200-203.
Cai Jia-ming, Liu Yong-hong, CaoMong-qi, Wang Qiang. Correction of 3D shot-points offsets in Xinglongtaiurban district. OGP, 2005, 40(2): 200-203.
