复杂构造区二维地震勘探需要注意的问题

The Issues Need Attention in Complex Tectonic Zone 2D Seismic Exploration

充分认识二维地震方法的固有缺陷,合理部署二维地震方案和勘探井,可有效降低地质勘探风险并提高勘探准确性。通过分析复杂地区的典型二维地震实例,讨论了二维地震勘探部署不当,二维地震剖面所反映的地层形态空间偏差过大导致的控制不足问题,大断裂附近异常波极为发育、无法合理解释造成的工作量浪费问题。提出了利用二维时间剖面数据和时深转换速度进行计算机地质成图时,数据空白区网格化质量的问题和相应的人工干预对策。

Fully understanding of the inherent defects in the 2D seismic method,reasonable deployment of 2D seismic scheme and exploration wells,can effectively reduce the geological prospecting risk and improve the explora-tion accuracy.By analyzing the typical examples of 2D seismic in complex area,the problems are discussed,such as the improper deployment of 2D seismic exploration,2D seismic sections reflecting large deviation of stratigraphic con-figuration space lead to less control,abnormal waves near the fault extremely developed and unaccountability lead to workload waste.Proposes when using 2D time profile data and time depth conversion speed make the computer graph-ics,data gaps grid quality problem and corresponding artificial intervention countermeasures.