电火花微测井在准噶尔盆地的适用性研究

Applicability of EDM micro logging in Junggar Basin

近年来,在准噶尔盆地推行宽频高密度可控震源高效地震采集技术,微测井常用的雷管等民爆物品震源,需要用非民爆物品震源替代,电火花震源是一种优选的替代震源。电火花震源替代雷管震源用于微测井资料采集,需要解决激发的稳定性、系统延迟时及电火花微测井精度等问题。通过试验,电火花激发在一定条件下是稳定的,系统延迟时满足技术指标要求,与常规微测井相比,资料解释成果误差在3%以内。通过在准噶尔盆地地震采集项目上的成功应用,证明电火花微测井可以替代常规微测井。

In recent years,an effective seismic acquisition technique targeted at broadband high-density controlled seismic sources has been put into force in the Junggar Basin.Regarding micro logging,civil explosion substances, including the commonly used detonator,etc.that acted as seismic sources,should be replaced with items rather than these substances.Electric spark source substituting for detonator source was adopted to acquire micro logging data, problems such as stability of the excitation,delay time of the system and precision of electric spark micro logging, etc.should be solved.Through tests,it was proven that electric spark excitation is steady under certain circumstances and delay time of the system was also up to requirements of the technical indicator.Comparing with conventional micro logging,error of data interpretation became 3% and below.As the electric spark micro logging has been successfully applied into the Junggar Basin Seismic Acquisition Project,we were able to use it to replace the conventional micro logging.