地震勘探中炸药震源激发问题的几点认识
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摘要
随着吐哈盆地勘探工作的进一步深入,通过多年来的不断探索,如何获取深层高品质的地震采集资料是解决深层攻关的关键所在,震源激发问题就显得尤为重要。从炸药爆炸原理机制、弹性力学理论及相关勘探基本理论的再认识出发,对激发药量与地震子波振幅、频率的关系、细长药柱的应力场特性和频率特性以及地层对地震子波的吸收衰减强度等进行了理论探索。在此基础之上,得出了地震勘探采集活动中激发条件选取的指导性原则,并就实际工作出现的问题进行了初步的认识和探讨。
As the oil exploration in Tuha basin go further, it becomes the key of deep formation exploration to acquire high quality seismic data of deep fonnation, in which the dynamite source shooting, especially, plays an important role. Through the re - understanding of principle of dynamite explosion, elastic mechanics and related exploration theories, the relations between the quantity of dynamite and the amplitude or frequency of seismic wavelet, the stress field and frequency features of the elongated charge, and the absorption loss of seismic wavelet in formation have been discussed. Based on these studies, guidelines for the shooting condition selection in seismic acquisition has laid down, some problems in practical application are discussed as well.
As the oil exploration in Tuha basin go further, it becomes the key of deep formation exploration to acquire high quality seismic data of deep fonnation, in which the dynamite source shooting, especially, plays an important role. Through the re - understanding of principle of dynamite explosion, elastic mechanics and related exploration theories, the relations between the quantity of dynamite and the amplitude or frequency of seismic wavelet, the stress field and frequency features of the elongated charge, and the absorption loss of seismic wavelet in formation have been discussed. Based on these studies, guidelines for the shooting condition selection in seismic acquisition has laid down, some problems in practical application are discussed as well.
引文
[1] 钱绍瑚,等.地层吸收衰减模型的制作及补偿方法的研究.石油地球物理勘探,1998,33,(1) :18-24．
[2] 钱绍瑚,等.炸药震源爆炸机制及激发条件的研究.石油物探,1998,37,(3) :1-14．
[3] 任义庆,等.地震爆炸震源模拟.石油物探,1998,37． (3) :15-21．
[4] 王永刚,等.增加深层下传能量的野外试验及理论分析.石油地球物理勘探,2001．
[2] 钱绍瑚,等.炸药震源爆炸机制及激发条件的研究.石油物探,1998,37,(3) :1-14．
[3] 任义庆,等.地震爆炸震源模拟.石油物探,1998,37． (3) :15-21．
[4] 王永刚,等.增加深层下传能量的野外试验及理论分析.石油地球物理勘探,2001．
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