高精度三维地震勘探技术在青藏高原沙漠戈壁区煤田的应用
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摘要
以青海省鱼卡煤田东部三维地震勘探为例,针对青藏高原沙漠戈壁区表浅层地层横向岩性变化大、岩性复杂、中深部断层褶皱非常发育、地层倾角大且变化剧烈、主要目的层层间距变化大、目的层(煤层)厚度变化大特点,采用钻机成孔,未风化基岩激发多种方法进行低速带调查,叠前时间偏移方法进行三维空间归位,三维地震数据体进行三维多属性地质解释等诸多技术和措施,获得了比较满意的地质成果。
To take 3D seismic exploration in eastern Iqe coalfield,Qinghai Province as an example,aimed at the Qinghai-Tibet Plateau desert and Gobi area near-surface larger transverse strata variation and complicated lithology,middle deep part faults and folds are well developed,larger and changing strata dip angles,intervals of main target beds have larger variation,used borehole unweathered rock shot,multiple methods were carried out for low velocity zone investigation,pre-stack time migration for 3D spatial homing,3D seismic data volume for 3D multi-attribute geological interpretation and finally obtained satisfied geological results.
To take 3D seismic exploration in eastern Iqe coalfield,Qinghai Province as an example,aimed at the Qinghai-Tibet Plateau desert and Gobi area near-surface larger transverse strata variation and complicated lithology,middle deep part faults and folds are well developed,larger and changing strata dip angles,intervals of main target beds have larger variation,used borehole unweathered rock shot,multiple methods were carried out for low velocity zone investigation,pre-stack time migration for 3D spatial homing,3D seismic data volume for 3D multi-attribute geological interpretation and finally obtained satisfied geological results.
引文
[1]张德忠.复杂地表地区地震勘探实例[M].北京:石油工业出版社,1994.
[2]韩文功,等.地震技术新进展[M].东营:中国石油大学出版社,2005.
[3]陈红恩,等.青海省鱼卡煤田东部三维地震勘探报告[R].河北邯郸:中国煤炭地质总局水文物测队,2006.
[2]韩文功,等.地震技术新进展[M].东营:中国石油大学出版社,2005.
[3]陈红恩,等.青海省鱼卡煤田东部三维地震勘探报告[R].河北邯郸:中国煤炭地质总局水文物测队,2006.
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