塔里木盆地河南探区地震资料处理方法研究
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摘要
二维原始地震资料表明,塔里木盆地阿北、顺北和草湖地区的目的层埋藏较深,地表和地下地质构造复杂,静校正问题突出,干扰波发育,信噪比低。通过分偏移距和优势频带静校正组合、多域去噪、精细速度分析和深层叠加成像等主要技术的应用,较好地解决了该区地震资料的静校正和低信噪比问题,提高了深层叠加成像的精度。经初步解释和地质分析认为,所处理剖面同相轴连续性好,信噪比较高,归位准确,剖面所反映的构造形态清楚,规模较大,基本落实了所部署测线工区的地下构造,而且还揭示了一些以前尚未认识到的构造或构造显示,丰富了该区构造特征和构造演化的认识。
The 2-D initial seismic data show that Abei,Shunbei and Caohu areas in Tarim basin are characterized by deep buried target zones,complex surface and subsurface geologic structures,problems in static correction,developed interference wave and low signal-to-noise ratio.This paper uses the techniques such as composite static correction of partial offset distance and dominant frequency,multi-domain noise elimination,accurate velocity analysis and deep superimposed imaging to better deal with the problem appeared in past static correction and low signal-to-noise ratio,improving the accuracy of the deep superimposed imaging.Preliminary seismic interpretation and geologic analysis indicate that the processed profile is in good continuity of events,high signal-to-noise ratio,proper return,clear structural attitude and larger scale,generally revealing the subsurface structures in the profile-studied area,including some structures or structural shows that never recognized before.This study enriches knowledge about the structural characteristics and structural evolution in this area.
The 2-D initial seismic data show that Abei,Shunbei and Caohu areas in Tarim basin are characterized by deep buried target zones,complex surface and subsurface geologic structures,problems in static correction,developed interference wave and low signal-to-noise ratio.This paper uses the techniques such as composite static correction of partial offset distance and dominant frequency,multi-domain noise elimination,accurate velocity analysis and deep superimposed imaging to better deal with the problem appeared in past static correction and low signal-to-noise ratio,improving the accuracy of the deep superimposed imaging.Preliminary seismic interpretation and geologic analysis indicate that the processed profile is in good continuity of events,high signal-to-noise ratio,proper return,clear structural attitude and larger scale,generally revealing the subsurface structures in the profile-studied area,including some structures or structural shows that never recognized before.This study enriches knowledge about the structural characteristics and structural evolution in this area.
引文
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[2]谢里夫R E,吉尔达特L P.勘探地震学[M.]初英,等,译.北京:石油工业出版社,1999.
[3]阎世信,刘怀山,姚雪根.山地地球物理勘探技术[M.]北京:石油工业出版社,2000.
[4]胡中平,孙建国.高精度地震勘探问题思考及对策分析[J.]石油地球物理勘探,2002,37(5):530-536.
[5]王彦春,余钦范,段云卿,等.折射波静校正法在复杂地表地区的应用[J.]物探与化探,1999,23(6):428-434.
[6]陈启元,王彦春,段云卿,等.复杂山区的静校正法探讨[J.]石油物探,2001,40(1):73-81.
[7]李庆忠.走向精确的勘探道路[M.]北京:石油工业出版社,1996.
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