OVT域处理技术在黄土塬区煤田三维地震勘探中的应用

Application of OVT domain processing technology in 3D seismic exploration of coalfield in loess plateau region

在煤层埋深较深、构造较复杂、煤层顶板水害较严重的煤矿,对煤层上部地层构造发育情况的勘探是重要的勘探任务。宽方位(全方位)地震勘探已成为现阶段地震勘探技术研究的发展方向,为了获得更多的地震信息、满足资料处理的高要求,以高家堡煤矿为工程背景,开展了OVT域处理技术的应用。在明确勘探区浅表层地震地质条件复杂、深层地震地质条件简单的基础上,通过设置采集观测系统,利用属性预测裂缝,取得了较好的效果。实践表明,OVT域处理技术是一种比较先进的叠前数据排列方式,可以有效改善宽方位数据处理效果,成果剖面分辨率明显提高,能够有效改善地震资料品质。

It is an important exploration task to explore the development of upper stratum structure of coal seam in the coal mine where the depth of coal seam is deep,the structure is complex and the roof water damage is serious.Wide-azimuth(omni-directional)seismic exploration has become the development direction of seismic exploration technology research at present stage.In order to obtain more seismic information and meet the high requirements of data processing,the application of OVT domain processing technology is carried out with Gaojiapu Coal Mine as engineering background.On the basis of clarifying that the shallow surface seismic geological conditions are complex and the deep seismic geological conditions are simple in the exploration area,good results have been achieved by setting up an acquisition and observation system and using attributes to predict fractures.The practice shows that OVT domain processing technology is an advanced way of prestack data arrangement,which can effectively improve the processing effect of wide azimuth data,improve the resolution of the result profile,and improve the quality of seismic data.