地震属性技术在解释小断层中的应用

Application of seismic attribute technology in interpreting small faults

落差2-5 m的小断层现成为影响煤矿生产效率和安全的一个重要因素。通过实例,探讨了三维地震对小的断层解释。建立了一个断层落差为2 m的地质模型进行数值模拟,并在正演生成的时间剖面上提取了属性,结果显示,虽然断层在时间剖面上看不出来,但在属性上有明显反映,因此利用地震属性技术可解释小断层。对一个实例利用地震属性技术进行了解释,解释出了一个落差2.5 m的断层,与煤矿实际揭露吻合。

The small fault whose gap is from 2 to 5 meters is an important factor in affecting productivity and safety of coal mine at present. This article has discussed on if 3D seismic can interpret a small fault. a geological model of fault whose fall head is 2 m was established for numerical simulation,meanwhile,attributes were extracted on time profile which was produced by forward modeling,the results indicate that,although faults are invisible on time profile,it can reflect on attributes obviously,therefore,small faults can be interpreted by using 3D seismic attributes. At last,a fault whose gap is 2. 5 meters has been interpreted by using seismic attributes technology to have applied on an example,fit with coal mine reality as well.