塔东北满加尔坳陷地震资料处理方法研究
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摘要
塔东北满加尔坳陷地区地表地质条件恶劣,地下构造复杂。工区表现为地表起伏剧烈的高大沙丘,在这里陡坡、陡坎为主要地貌。受复杂地表因素影响,所获地震记录,各种干扰波发育,在大量试验及分析的基础上,采用沙丘曲线静校正、折射波静校正、剩余静校正相结合的办法有效地解决了由于地形起伏、低降速带速度与厚度的剧烈变化等因素所带来的静校正影响。实践证明,该方法系列能有效地解决满加尔地区复杂地表条件下静校正问题,对于提高地震资料的信噪比和地下成像质量能发挥积极作用。采用多域去噪、振幅补偿、串联反褶积等技术方法,提高了剖面的信噪比。
In Manjia'er,Tadongbei depression district,the geological condition of the earth's surface is rough and the underground structure is very complex.Tall dunes with the rugged surface are seen in this district.The physiognomy there is steep and scarp.With the complex factors,the obtained seismic data,the development with various disturbing waves are tested and analyzed in this paper.The dune curve static correction,refractive static correction and residual static correction are adopted to solve the problem caused by hypsography,low velocity and so on effectively.The result shows that the method is very effective in the use of the complex surface in ManJia'er district.What's more,it plays an active role in improving seismic data's SNR(signal to noise ratio) and subsurface imaging quality.
In Manjia'er,Tadongbei depression district,the geological condition of the earth's surface is rough and the underground structure is very complex.Tall dunes with the rugged surface are seen in this district.The physiognomy there is steep and scarp.With the complex factors,the obtained seismic data,the development with various disturbing waves are tested and analyzed in this paper.The dune curve static correction,refractive static correction and residual static correction are adopted to solve the problem caused by hypsography,low velocity and so on effectively.The result shows that the method is very effective in the use of the complex surface in ManJia'er district.What's more,it plays an active role in improving seismic data's SNR(signal to noise ratio) and subsurface imaging quality.
引文
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[2]李庆忠.走向精确勘探的道路[M].北京:石油工业出版社,1993.
[3]渥.伊尔马兹.地震资料处理[M].北京:石油工业出版社,1994.
[4]曾庆才,李琛.沙漠地区地震资料处理方法研究[J].2003,42(3):406～409.
[5]刘红霞,高林.复杂地表地区地震勘探静校正方法应用研究[J].世界地质,2002,21(3):294～298.
[6]秦亚玲,王彦春,王瑞祥,等.用多项式拟合求取沙漠地区表层速度的静校正方法[J].天然气工业,2009,29(6):36～39.
[7]王彦春,于钦范,李峰,等.交互迭代静校正方法[J].石油物探,1998,32(2):63～70.
[8]蔡希玲.声波和强能量干扰的分频自适应检测与压制方法[J].石油地球物理勘探,1999,34(4):373～380.
[9]蔡希玲,张俊桥.复杂地表区噪音分析技术与噪音压制方法应用[J].石油地球物理勘探,2002,37(增刊):1～4.
[10]马义忠,于更新,符力耘.复杂地表低信噪比地震数据处理研究[J].地球物理学进展,2008,23(6):1849～1858.
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