石油物探解译在判定断裂地震活动性研究的探讨

Application of Petroleum Geophysical Interpretation in Judging Fracture Seismic Activity

为了确定城市松散覆盖区内隐伏断裂的性质及活动性,浅层地震勘探是非常重要的手段,而在活动断裂深部背景探明和判断孕震可能性时,应选择使用各种深部地震探测方法。在开展讷河市断层探测项目中,对讷河市周围的第四系隐伏区的断裂采用了石油物探解译方法,幵结合石油钻孔资料和地震勘探,确定断裂的存在、上断点的埋深以及深浅构造之间的关系,幵通过6条断裂探测的示例,探讨石油物探解译在判定断裂地震活动性研究上的意义,判定了工作区内最主要的孕震断裂讷漠尔河断裂的最新活动时代为早中更新世。

For acquiring properties andactivityof the buried fault under loose overburden in some large cities,the shallow seismic explorationis avery importantway;butinexploringactive faultdeep background andjudging seismogenic possibility,various deep seismic sounding methodsshould be chosen. In carrying out detection of Nehe fault activityproject, petroleum geophysical interpretation methodswere used forthe fracture of Nehe surrounding quaternaryconcealedarea.Combinedwith oil drilling and seismic exploration,the presence of faultswas determined as well asthe depth of theupperbreakpoint and the relationship betweenshallowand deep structures. Through analyzingthe examplesof six breaksdetection, the significance of petroleum geophysical interpretation in determining fracture seismic activitywasdiscussed. Andit’sdetermined thatthe age of the latest activities of mainseismogenic Nehe faults in the work area was early or middlePleistocene.