黄瓜峁-茫东-黄石地区宽线二维地震采集技术探讨

Research on wide-line two-dimensional seismic acquisition method of Huangguamao-Mangdong-Huangshi region

近年来随着地震勘探的进一步深入,勘探区域由构造简单区向构造复杂区转变,常规二维采集方法难以取得品质较高的地震资料。为了提高资料品质,柴达木盆地很多高陡构造区采用了宽线二维地震采集方法,并且取得了较好的效果,但在2014年-2015年的黄瓜峁-茫东-黄石系列项目中却出现了宽线二维剖面资料品质不及常规二维老剖面的现象,这里对这种现象进行系统的分析,提出了合理拆分炮点、采用小道距小组合接收、优化接收线距、选择合适横向面元大小等一系列技术措施,并针对该区域地震地质特点提出了合理化建议。

In recent years,with the further development of seismic exploration,the exploration area is changed from simple structure to complex structure.Conventional two-dimensional acquisition method is difficult to obtain high-quality seismic data.In order to improve the quality of data,many complicated tectonic areas in Qaidam basin have adopted wide-line two-dimensional seismic acquisition method,and have achieved good results.But in the 2014-2015 Huangguamao-Mangdong-Huangshi series of projects where the wide-line two-dimensional profile data quality is less than the conventional two-dimensional profile of the phenomenon.In this paper,such a phenomenon is systematically analyzed.The paper puts forward a series of technical measures such as the reasonable split shot,the small distance from the small group to receive,optimizing the receiving line distance,selecting the appropriate horizontal face size and so on,and then put forward the rationalization suggestion for the seismic geology characteristics of the area.