延迟震源技术在三维高分辨率地震勘探中的应用
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摘要
探讨了延迟爆炸震源技术,设计了延迟震源柱的制作方法,进行了野外点试验和束线试验,对比分析了延迟炸药震源和普通炸药震源所获得的地震资料在频率和能量方面的特征。延迟炸药震源具有丰富的高频成分,其地震波具有较强的下传能力,能提高中深层反射波能量。除垂直向下方向和其附近方向以外的其它方向特别是向上方向和水平方向,由于每个小炸药包爆炸所产生的地震波相位等不一致,所产生的面波等干扰波能量均相互削弱。延迟炸药震源地震剖面各目的层反射波稳定且连续性好,反射特征清楚,断点清晰,说明了延迟炸药震源是一种较好的地震激发震源。在官1井区三维高分辨率地震勘探中采用了这一新技术,获得了好的高分辨率地震资料。
This paper discusses delayed blast technology. The assembly of a delayed blast source is introduced. To compare sections resulted from the delayed blast source and conventional explosives, point and swath tests were implemented. It is showed that the delayed blast source has the advantage over conventional explosives. The seismic waves excited by the delayed blast source are rich in high frequency components, and strong in downgoing capability, which are favorable for the enhancement of reflection energy for middle and deep layers. Apart from near vertically downgoing directions, interference waves like ground roll act against each other, especially in up-going and horizontal directions, due to the phase differences of waves. Reflections on the resulted seismic sections are of good definition and continuity, and faults are readily recognized. Satisfactory high resolution seismic data have been acquired by using the new source in Guan 1 survey area.
This paper discusses delayed blast technology. The assembly of a delayed blast source is introduced. To compare sections resulted from the delayed blast source and conventional explosives, point and swath tests were implemented. It is showed that the delayed blast source has the advantage over conventional explosives. The seismic waves excited by the delayed blast source are rich in high frequency components, and strong in downgoing capability, which are favorable for the enhancement of reflection energy for middle and deep layers. Apart from near vertically downgoing directions, interference waves like ground roll act against each other, especially in up-going and horizontal directions, due to the phase differences of waves. Reflections on the resulted seismic sections are of good definition and continuity, and faults are readily recognized. Satisfactory high resolution seismic data have been acquired by using the new source in Guan 1 survey area.
引文
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8朱成宏,胡建国,许学峰,等.裂隙介质的运动学特征反演与应用[J].石油物探,2002,41(3) :253～258
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2 Moldoveanu N.海上地震勘探中的垂直震源组合[A].见:郭建,宋玉龙.SEG 第70届年会论文摘要[C].北京:石油工业出版社,2002． 133～136
3赵殿栋,谭绍泉,徐锦玺,等.地震采集中低截滤波的试验分析[J].石油物探,2001,40(2) :92～97
4吕公河,张庆淮,段卫星,等.黄土塬地区地震勘探采集技术[J].石油物探,2001,40(2) :84～91
5胡立新,杨德宽,何兵寿,等.延迟爆炸法的理论分析[J].石油地球物理勘探,2002,37(1) :33～38
6吴铭东,李峰,马学军.塔河1号油田高分辨率地震勘探采集试验[J].石油物探,2000,39(4) :49～56
7李忠平.渝鄂湘山地地震勘探资料采集中的几个关键问题[J].石油物探,2000,39(4) :40～48
8朱成宏,胡建国,许学峰,等.裂隙介质的运动学特征反演与应用[J].石油物探,2002,41(3) :253～258
9张美根,王妙月.各向异性介质弹性波叠后逆时深度偏移[J].石油物探,2002,41(3) :259～263
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