鄂尔多斯盆地西缘黄土塬区综合物探技术的应用效果
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摘要
鄂尔多斯盆地西缘地区不仅地表起伏大,地下构造复杂,而且黄土层厚度变化也很大,导致地震勘探效果较差。该区重力和CEMP勘探效果好坏的关键是能否消除巨厚黄土层和地形起伏对重力异常的影响,以及减小或压制地形和随机噪声对CEMP资料的静态位移影响。对此提出了一套针对黄土覆盖区的重力异常校正方法和压制黄土塬区CEMP静态位移的方法,通过在该区进行CEMP和高精度重力资料综合处理解释及分析研究,取得了很好的勘探效果,对优选勘探有利目标发挥了较好的作用。
The western margin area of Ordos Basin is characteristic of not only larger fluctuant surface and complex underground structure,but also large variation of loess thickness,leading to poor effect of seismic exploration.The key of effects in gravity and CEMP exploration is whether the influence of the fluctuation of giant-thickness of loess layer and topographic fluctuation on gravity anomaly can be eliminated or not,and reduces or suppresses the influence of topography and random noise on static displacement of CEMP data.For that reason,the paper presented a set of method of correction of gravity anomaly in the loess-covered area and method for suppressing CEMP static displacement in loess plateau area.The good exploration effects were achieved by integrated processing,interpretation and study of CEMP and high-precision gravity data,playing the better role in optimization of target benefit for exploration.
The western margin area of Ordos Basin is characteristic of not only larger fluctuant surface and complex underground structure,but also large variation of loess thickness,leading to poor effect of seismic exploration.The key of effects in gravity and CEMP exploration is whether the influence of the fluctuation of giant-thickness of loess layer and topographic fluctuation on gravity anomaly can be eliminated or not,and reduces or suppresses the influence of topography and random noise on static displacement of CEMP data.For that reason,the paper presented a set of method of correction of gravity anomaly in the loess-covered area and method for suppressing CEMP static displacement in loess plateau area.The good exploration effects were achieved by integrated processing,interpretation and study of CEMP and high-precision gravity data,playing the better role in optimization of target benefit for exploration.
引文
[1]何展翔等.非地震技术在油气勘探中的作用.石油勘探与开发,2001,28(4)
[2]王家林.石油重磁解释.北京:石油工业出版社,1991
[3]何自新等.鄂尔多斯盆地演化与油气.北京:石油工业出版社,2003
[2]王家林.石油重磁解释.北京:石油工业出版社,1991
[3]何自新等.鄂尔多斯盆地演化与油气.北京:石油工业出版社,2003
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