激发井深选择的优化技术
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摘要
炸药震源是陆上地震勘探使用最广泛的激发方式。针对虚反射界面对其激发出的子波所产生的影响,从频率和振幅2个方面进行了分析。经过野外实地试验,确定利用虚反射调查和激发子波监测的定量分析技术可较准确地选择激发井的深度。尤其在深层地震勘探中,将激发深度选择在虚反射界面1／4波长处,可获得能量较强的激发子波,有利于提高深层的反射能量,改善地震剖面的整体品质。
Dynamite is the main source in the onshore seismic acquisition at present. It's important to determine the optimal hole depth to obtain better seismic records for various exploration targets. This article present a method of determining hole depth scientifically by means of analyze dynamite source wavelets, the phantom reflection effected on wavelet blazed, analyzed by frequency and amplitude and got great progress in the deep layer seismic exploration in east China. Especially the depth chose the 1/4 of wavelength in the deep prospecting. It is propitious to improve the reflection energy and seismic section quality and received the stronger wavelet. The author also argued that we should use different hole depths according to the various geologic requirements and weathering layers.
Dynamite is the main source in the onshore seismic acquisition at present. It's important to determine the optimal hole depth to obtain better seismic records for various exploration targets. This article present a method of determining hole depth scientifically by means of analyze dynamite source wavelets, the phantom reflection effected on wavelet blazed, analyzed by frequency and amplitude and got great progress in the deep layer seismic exploration in east China. Especially the depth chose the 1/4 of wavelength in the deep prospecting. It is propitious to improve the reflection energy and seismic section quality and received the stronger wavelet. The author also argued that we should use different hole depths according to the various geologic requirements and weathering layers.
引文
1 潘文锋,赵伟卫,孟祥顺,等.高分辨率地震勘探中最佳 药量及耦合条件的选取[J].石油地球物理勘探,2000,35(4):443-451
2 李套山,高洪强,刘振夏,等.虚反射信息的采集及其形 成机制频率响应的理论探讨[J].石油物探,1997,36 (4):38-44
3 谢海兵,马在田,王燕琨.井间地震导波速度特征研究 [J].石油物探,1998,37(2):8-13
4 陈世军,周建宇,王延广,等.井问地震技术在樊124井 区的应用[J].石油物探,2003,42(3):369-373
5 Monk D. Pitfalls in seismic acquisition[J]. The Leading Edge, 1999,18(9): 1 080-1 083
6 Hamarbition N S, Margrave G F. Spectral analysis of a ghost[J]. Geophysics,2001,66(4) : 1 267-1 273
7 吕公河.地震勘探中震动问题分析[J].石油物探,2002, 41(2):154-157
2 李套山,高洪强,刘振夏,等.虚反射信息的采集及其形 成机制频率响应的理论探讨[J].石油物探,1997,36 (4):38-44
3 谢海兵,马在田,王燕琨.井间地震导波速度特征研究 [J].石油物探,1998,37(2):8-13
4 陈世军,周建宇,王延广,等.井问地震技术在樊124井 区的应用[J].石油物探,2003,42(3):369-373
5 Monk D. Pitfalls in seismic acquisition[J]. The Leading Edge, 1999,18(9): 1 080-1 083
6 Hamarbition N S, Margrave G F. Spectral analysis of a ghost[J]. Geophysics,2001,66(4) : 1 267-1 273
7 吕公河.地震勘探中震动问题分析[J].石油物探,2002, 41(2):154-157
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