弱弹性介质中炸药震源大基距面积组合激发效果分析
|
摘要
针对地震勘探中弱弹性介质(弹性较差的介质)地震波激发问题,如何更好地利用弱弹性介质的弹性性质是改善激发效果的关键。根据井中炸药震源激发的特点,通过大面积组合激发可以增加对弱弹性介质的作用面,即可以较好利用弱弹性介质的弹性特点,从而激发出较强的弹性波。在黄土塬和灰岩区分别进行了不同组合井距的面积组合激发试验,对试验资料的分析表明,随着组合基距的增大,不仅激发地震波的信噪比提高,而且地震波的能量也有所提高。这一结果表明,增大激发作用面可以有效地改善在弱弹性介质中的激发效果。
For the activation of seismic waves in weak elastic medium(medium with poor elasticity),how to make better use of its elastic properties is the key to improving shooting effects.According to the shooting characteristics of borehole dynamite source,shooting with large areal array increases the acting surface for the weak elastic medium,which means the elastic features of weak elastic medium can be better revealed and better elastic waves can be excited.Areal array shooting experiments with different group lengths are carried out in loess tableland and limestone regions,respectively.Analysis of the experimental data shows that besides the improvement of signal-to-noise ratio of seismic waves,the energy of seismic waves enhances with the increase of group length.The results show that increasing the acting surface can effectively improve the shooting effects in weak elastic medium.
For the activation of seismic waves in weak elastic medium(medium with poor elasticity),how to make better use of its elastic properties is the key to improving shooting effects.According to the shooting characteristics of borehole dynamite source,shooting with large areal array increases the acting surface for the weak elastic medium,which means the elastic features of weak elastic medium can be better revealed and better elastic waves can be excited.Areal array shooting experiments with different group lengths are carried out in loess tableland and limestone regions,respectively.Analysis of the experimental data shows that besides the improvement of signal-to-noise ratio of seismic waves,the energy of seismic waves enhances with the increase of group length.The results show that increasing the acting surface can effectively improve the shooting effects in weak elastic medium.
引文
[1]吕公河,张庆淮,段卫星等.黄土塬地区地震勘探采集技术.石油物探,2001,40(2):84～91LüGong-he,Zhang Qing-huai,Duan Wei-xing et al.Seismic acquisition in loess yuan areas.GeophysicalProspecting for Petroleum,2001,40(2):84～91
[2]孙景旺,杜中东,任文军等.鄂尔多斯盆地黄土塬区多线地震采集技术.石油物探,2003,42(4):505～507Sun Jing-wang,Du Zhong-dong,Ren Wen-jun et al.Seismic acquisition with a swath of lines in area of lo-ess tableland.Geophysical Prospecting for Petrole-um,2003,42(4):505～507
[3]郭红启,林明强,陆昌平等.民和盆地黄土塬区地震采集技术.石油地球物理勘探,2008,43(增1):1～4Guo Hong-qi,Lin Ming-qiang,Lu Chang-ping et al.Seismic acquisition technique in loess plateau of Min-he basin.OGP,2008,43(Sup 1):1～4
[4]李仲远.南方碳酸盐岩地区地震采集技术方法探讨.天然气工业,2009,29(6):33～36Li Zhong-yuan.A discussion on technologies of seis-mic data acquisition in carbonate area of South China.Natural Gas Industry,2009,29(6):33～36
[5]杨贵祥.碳酸盐裸露区地震勘探采集方法.地球物理学进展,2005,20(4):1108～1128Yang Gui-xiang.The method of seismic explorationin the bare carbonate rock area.ProgressinGeophysics,2005,20(4):1108～1128
[6]汪学武.南方黔中碳酸盐岩裸露区地震采集方法探讨.石油物探,2007,46(5):514～520Wang Xue-wu.Seismic data acquisition method forcarbonate outcropped area in central Guizhou provinceof southern China.Geophysical Prospecting for Pe-troleum,2007,46(5):514～520
[7]吕公河.地震勘探中振动问题分析.石油物探,2002,41(2):154～157Lu Gong-he.An analysis of vibration problem in seis-mic exploration.Geophysical Prospecting for Petro-leum,2002,41(2):154～157
[8]杨勤勇,常鉴,徐国庆.灰岩裸露区地震激发机理研究.石油地球物理勘探,2009,44(4):399～405Yang Qin-yong,Chang Jian,Xu Guo-qing.Study onshooting mechanism of seismic waves in limestone-exposed area.OGP,2009,44(4):399～405
[9]赵延江.黄土塬地区地震勘探激发技术探讨.石油物探,2006,45(6):646～650Zhao Yan-jiang.Research on shooting techniques ofseismic prospecting in Huangtuyuan area.GeophysicalProspecting for Petroleum,2006,45(6):646～650
[10]钟绍华,杨通胜.山区地震勘探激发要素探讨.石油地球物理勘探,1995,30(增1):160～163Zhong Shao-hua,Yang Tong-sheng.A discussion ofexcitation factors of seismic exploration in mountain-ous regions.OGP,1995,30(Sup 1):160～163
[11]戈革等.地震波动力学基础.北京:石油工业出版社,1983
[12]钱荣钧.炸药震源激发效果分析.石油地球物理勘探,2003,38(6):583～588Qian Rong-jun.Analysis of explosive effect of dyna-mite source.OGP,2003,38(6):583～588
[2]孙景旺,杜中东,任文军等.鄂尔多斯盆地黄土塬区多线地震采集技术.石油物探,2003,42(4):505～507Sun Jing-wang,Du Zhong-dong,Ren Wen-jun et al.Seismic acquisition with a swath of lines in area of lo-ess tableland.Geophysical Prospecting for Petrole-um,2003,42(4):505～507
[3]郭红启,林明强,陆昌平等.民和盆地黄土塬区地震采集技术.石油地球物理勘探,2008,43(增1):1～4Guo Hong-qi,Lin Ming-qiang,Lu Chang-ping et al.Seismic acquisition technique in loess plateau of Min-he basin.OGP,2008,43(Sup 1):1～4
[4]李仲远.南方碳酸盐岩地区地震采集技术方法探讨.天然气工业,2009,29(6):33～36Li Zhong-yuan.A discussion on technologies of seis-mic data acquisition in carbonate area of South China.Natural Gas Industry,2009,29(6):33～36
[5]杨贵祥.碳酸盐裸露区地震勘探采集方法.地球物理学进展,2005,20(4):1108～1128Yang Gui-xiang.The method of seismic explorationin the bare carbonate rock area.ProgressinGeophysics,2005,20(4):1108～1128
[6]汪学武.南方黔中碳酸盐岩裸露区地震采集方法探讨.石油物探,2007,46(5):514～520Wang Xue-wu.Seismic data acquisition method forcarbonate outcropped area in central Guizhou provinceof southern China.Geophysical Prospecting for Pe-troleum,2007,46(5):514～520
[7]吕公河.地震勘探中振动问题分析.石油物探,2002,41(2):154～157Lu Gong-he.An analysis of vibration problem in seis-mic exploration.Geophysical Prospecting for Petro-leum,2002,41(2):154～157
[8]杨勤勇,常鉴,徐国庆.灰岩裸露区地震激发机理研究.石油地球物理勘探,2009,44(4):399～405Yang Qin-yong,Chang Jian,Xu Guo-qing.Study onshooting mechanism of seismic waves in limestone-exposed area.OGP,2009,44(4):399～405
[9]赵延江.黄土塬地区地震勘探激发技术探讨.石油物探,2006,45(6):646～650Zhao Yan-jiang.Research on shooting techniques ofseismic prospecting in Huangtuyuan area.GeophysicalProspecting for Petroleum,2006,45(6):646～650
[10]钟绍华,杨通胜.山区地震勘探激发要素探讨.石油地球物理勘探,1995,30(增1):160～163Zhong Shao-hua,Yang Tong-sheng.A discussion ofexcitation factors of seismic exploration in mountain-ous regions.OGP,1995,30(Sup 1):160～163
[11]戈革等.地震波动力学基础.北京:石油工业出版社,1983
[12]钱荣钧.炸药震源激发效果分析.石油地球物理勘探,2003,38(6):583～588Qian Rong-jun.Analysis of explosive effect of dyna-mite source.OGP,2003,38(6):583～588
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心