摘要
库车坳陷山地地震勘探受复杂地表和地下条件影响,激发和接收条件差,原始资料信噪比低,构造成像困难,影响地下构造形态认识和油气资源评价。在西秋里塔格构造带进行了宽线采集技术攻关,针对工区复杂的地震地质条件,提出了相应的技术对策。首先对宽线主要采集参数如道距、覆盖次数、最大炮检距、接收线距和激发接收参数等进行了详细论证,然后根据论证结果选择2炮3线、单线480道接收的宽线观测系统进行了资料采集。与常规二维采集相比,宽线采集能较好地解决复杂山体区资料信噪比低,浅层反射弱和中、深层成像难的问题,所获得的剖面品质有较大幅度的改善。
Because of the complex surface and subsurface conditions as well as the poor shooting and receiving conditions encountered in seismic survey in the mountainous area of Kuqa depression,the ac- quired seismic data is low in S/N and difficult in imaging the sub- surface structure.Aiming at this problem,we studied the wide-line seismic acquisition technique and applied it in western Qiulitage structural belt.Aiming at the complex geological and seismic con- ditions in the area,the technical countermeasures were proposed. Some basic parameters were evaluated,such as receiver interval, fold,maximum offset,receiver line interval,shooting and receiv- ing parameters,and wide-line geometry was selected with 2 shots, 3 receiver lines,and 480 receiving traces on a line.The quality of the obtained profiles has been greatly changed,with much higher S/N in complex mountainous area and good imaging effect of the structure from shallow to deep underground.
出处
《石油物探》
EI
CSCD
2008年第4期418-424,共7页
Geophysical Prospecting For Petroleum
