陇东巨厚黄土塬区煤田地震采集效果分析

Earthquake gather result analytical method of coal field in longdong loess plateau

随着资源开发需要,近年来陇东地区资源勘探程度不断加深,地震采集技术的提高成为该地区资源勘探关键。以陇东地区多个勘查区二维及三维煤田地震勘探资料为依托,通过对比分析,获得研究区全区地震数据特征、采集效果及最佳激发参数。结果可知:研究区煤田地震勘探黄土塬上最佳激发参数是井深8~16 m、单井药量2 kg、6井组合、井间距5 m;研究区内通过多井组合、大药量、深井激发方式能够获得良好的煤田地震采集资料;研究区全区发育良好、波组特征明显的反射波组有四组,分别是TQ波、Tn波、TK波和TT波;研究结果证明虽然在巨厚黄土塬区开展三维地震勘探工作难度极大,但通过优选采集参数也能够获得优质的地震资料。

As time goes on the need of resource development,the recent years degree of resource exploration in longdong region has been deeped,and in this regionthe improvement of earthquakegathertechnology has become the important to resource exploration.on account of 2D and 3D earthquake data of coal field in longdong area,the characteristics of earthquake data,gather effect and optimal excitation parameters are obtained through comparative analysis.Result:The optimal excitation parameter on loess plateau in earthquake exploration of coal field in the study area is welling depth 8~16 m,single well use level 2 kg、6 well combination、well spacing 5 m;Good earthquake data can be obtained by multi-well combination,large use level and deep well excitation in the study area;In the study area,there are four groups of well-developed reflected waves with distinct characteristics,namely TQ wave,Tn wave,TK wave and TT wave.The results show that:although it is very difficult to carry out 3D earthquake exploration in the giant thick loess plateau,high quality earthquake data can be obtained by optimizing the collection parameters.