高分辨率地震技术在宁东煤田构造勘查中的应用
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摘要
宁东煤田地震勘探的开展始于2003年,截至2008年底,共完成各种勘查阶段的地震勘探报告29件,累计完成二维地震勘探物理点约144270万个,三维地震勘探控制面积159.33km2。历经6年多的努力,已初步形成了颇具宁东(沙漠、半沙漠和戈壁复杂地震地质条件)特色的六项地震勘探优势技术,即:①沙漠区、戈壁区地震资料采集技术;②复杂地表高精度静校正技术;③共反射面元优化叠加技术;④叠前偏移技术;⑤小断层地震识别技术;⑥陡倾逆掩构造高精度地震成像技术。从而使地震勘探技术在这一地区的煤田构造勘探中的应用取得了突破性进展。实践表明,其三维地震精细地质构造勘探与二维地震快速控制地质构造勘探,可有效提高勘查精度、降低勘查费用、缩短勘查周期。
Seismic prospecting in the Ningdong coalfield start from 2003,up to the end of 2008,29 seismic prospecting reports of different prospecting stages have been accomplished,with accumulative total of 144270 seismic prospecting physical points,controlled area159.33km2.Have made great efforts over 6 years,preliminarily formed 6 seismic prospecting predominant techniques with eastern Ningxia(complicated seismic geological conditions of desert,semi-desert and gobi areas) characteristics.They are ① seismic data acquisition technique in desert,gobi areas;② high precision statics technique on complex surfaces;③ common-reflection surface element optimizing and stacking techniques;④ high accuracy 3D seismic technology;⑤ minor fault seismic identifying technique;⑥ steep-dipping thrust seismic imaging technique.Thus breakthrough achieved in application of seismic coalfield structure prospecting in this area.Practices have demonstrated that the 3D precision seismic structure prospecting and 2D seismic structure quick speed controlling can improve prospecting accuracy,lowering prospecting expenditure and shortening prospecting period effectively.
Seismic prospecting in the Ningdong coalfield start from 2003,up to the end of 2008,29 seismic prospecting reports of different prospecting stages have been accomplished,with accumulative total of 144270 seismic prospecting physical points,controlled area159.33km2.Have made great efforts over 6 years,preliminarily formed 6 seismic prospecting predominant techniques with eastern Ningxia(complicated seismic geological conditions of desert,semi-desert and gobi areas) characteristics.They are ① seismic data acquisition technique in desert,gobi areas;② high precision statics technique on complex surfaces;③ common-reflection surface element optimizing and stacking techniques;④ high accuracy 3D seismic technology;⑤ minor fault seismic identifying technique;⑥ steep-dipping thrust seismic imaging technique.Thus breakthrough achieved in application of seismic coalfield structure prospecting in this area.Practices have demonstrated that the 3D precision seismic structure prospecting and 2D seismic structure quick speed controlling can improve prospecting accuracy,lowering prospecting expenditure and shortening prospecting period effectively.
引文
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[4]邹才能,等.油气勘探开发实用地震新技术[M].北京:石油工业出版社,2002.
[2]许云.地震层状构造理论及其应用[M].北京:石油工业出版社,1983.
[3]唐建益,方正.煤矿采区实用地震技术[M].北京:煤炭工业出版社,1998.
[4]邹才能,等.油气勘探开发实用地震新技术[M].北京:石油工业出版社,2002.
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