二维三分量地震采集技术在四川盆地广安构造的应用
|
摘要
二维三分量地震勘探采用纵波激发,三分量检波器接收P波和S波。在设置采集参数时,充分考虑P波和S波的传播特性,利用P波和S波的AVO响应确认炮检距,综合应用CCP和CMP获得排列长度和道距;在野外施工时根据横波波长短、信号弱的特点,选择较大的药量激发,并且改进接收方式,以获得更大的S波响应。由于S波受近地表影响严重,故采用小间隔多点调查,获得了更准确的S波静校正。通过对采集方法的探讨,广安构造二维三分量资料采集获得了较好的效果,为后期研究该地区的地下地质特征提供了依据。
In 2D 3-component (3C) geophysical prospecting, P-wave charge is adopted and P-and S-wave are received by 3C geophone. When acquisition parameters are set, the propagation characteristics of P-and S-wave may be fully considered, the offset is confirmed by P-and S-wave AVO response, and spread length and trace offset are gained by both CCP and CMP. Based on wave length and weak signal of S-wave, more charge is chosen and receiving patterns are improved in order to get a longer S-wave response in field operation. Due to S-wave affected by near surface seriously, a multipoint examination in small space is used so as to obtain more accurate S-wave static correction. Through studying acquisition methods, better results have been obtained by 2D 3C seismic acquisition in Guangan Structure and they also provide a basis for the subsurface geology research in the area.
In 2D 3-component (3C) geophysical prospecting, P-wave charge is adopted and P-and S-wave are received by 3C geophone. When acquisition parameters are set, the propagation characteristics of P-and S-wave may be fully considered, the offset is confirmed by P-and S-wave AVO response, and spread length and trace offset are gained by both CCP and CMP. Based on wave length and weak signal of S-wave, more charge is chosen and receiving patterns are improved in order to get a longer S-wave response in field operation. Due to S-wave affected by near surface seriously, a multipoint examination in small space is used so as to obtain more accurate S-wave static correction. Through studying acquisition methods, better results have been obtained by 2D 3C seismic acquisition in Guangan Structure and they also provide a basis for the subsurface geology research in the area.
引文
1董敏煜.多波多分量地震勘探[M].北京:石油工业出版社,2002.
2李庆忠.岩石的纵横波速度规律[J].石油地球物理勘探,1992,27(1).
3S.诺曼.多门尼科主编.横波勘探论文集[M].北京:石油工业出版社,1987.
4石建新,王延光,毕丽飞,等.多分量地震资料处理解释技术研究[J].地球物理学进展,2006,21(2):505-511.
5王光杰,陈东,赵爱华,等.多波多分量地震探测技术[J].地球物理学进展,2000,15(1):54-59.
6徐丽萍,杨勤.多波多分量地震技术发展与展望[J].勘探地球物理进展,2002,25(3):47-52.
7李庆忠,王建花.多波地震勘探的难点与展望[M].青岛:中国海洋大学出版社,2007.
8姚姚.多波地震勘探的发展里程和趋势展望[J].勘探地球物理进展,2005,28(3):169-173.
2李庆忠.岩石的纵横波速度规律[J].石油地球物理勘探,1992,27(1).
3S.诺曼.多门尼科主编.横波勘探论文集[M].北京:石油工业出版社,1987.
4石建新,王延光,毕丽飞,等.多分量地震资料处理解释技术研究[J].地球物理学进展,2006,21(2):505-511.
5王光杰,陈东,赵爱华,等.多波多分量地震探测技术[J].地球物理学进展,2000,15(1):54-59.
6徐丽萍,杨勤.多波多分量地震技术发展与展望[J].勘探地球物理进展,2002,25(3):47-52.
7李庆忠,王建花.多波地震勘探的难点与展望[M].青岛:中国海洋大学出版社,2007.
8姚姚.多波地震勘探的发展里程和趋势展望[J].勘探地球物理进展,2005,28(3):169-173.
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