基于波动方程和地震照明度的渝西山地煤炭资源二维地震勘探研究
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摘要
针对渝西煤炭资源分布区山地地形及地层受褶皱控制的地质特点,利用波动方程进行正演模拟,验证了开展二维地震探勘的可行性。利用叠前逆时偏移成像优选出适合工作区地质特征的观测系统,采用地震照明分析对该观测系统进行了评估,并针对背斜轴部能量不均匀区局部加密炮点,提高了地下复杂构造的成像精度。该技术对改善复杂地区地震采集资料的质量有重要作用和指导意义。
To aim at the geological characteristics of the mountainous terrain and the fold-controlled strata of coal resources distribution in western Chongqing area,the possibility of applying 2D seismic method to explore the mountainous coal resources was verified by using the wave equation modeling.The prestack inverse-time migration imaging was applied for selecting an observation system suitable for the geological characteristics of the working area,evaluation was carried out on this observation system by the seismic illumination analysis,and the partial encryption shot-point in the uneven energy region of the anticline axis improved the imaging accuracy of underground complex structures.This technology has the important role and guiding significance for improving the quality of seismic acquisition data in complex areas.
To aim at the geological characteristics of the mountainous terrain and the fold-controlled strata of coal resources distribution in western Chongqing area,the possibility of applying 2D seismic method to explore the mountainous coal resources was verified by using the wave equation modeling.The prestack inverse-time migration imaging was applied for selecting an observation system suitable for the geological characteristics of the working area,evaluation was carried out on this observation system by the seismic illumination analysis,and the partial encryption shot-point in the uneven energy region of the anticline axis improved the imaging accuracy of underground complex structures.This technology has the important role and guiding significance for improving the quality of seismic acquisition data in complex areas.
引文
[1]罗建峰,王松,孙杰龙,等.九龙川矿黄土塬复杂地表三维地震勘探技术[J].矿业安全与环保,2013,40(5):73-76.
[2]朱金平,董良国,程玖兵.基于地震照明、面向勘探目标的三维观测系统优化设计[J].石油地球物理勘探,2011,46(3):339-348.
[3]陈生昌,毕亚杰,林晨.地震观测系统评价的波动方程方向照明方法[J].石油地球物理勘探,2009,44(6):656-661.
[4]李佩,陈生昌,常鉴,等.基于波动理论的地震观测系统设计[J].浙江大学学报(工学版),2010,44(1):203-208.
[5]牟永光,裴正林.三维复杂介质地震数值模拟[M].北京:石油工业出版社,2005.
[6]邹春艳,高明专,吕吉春.采区地震勘探在山脚树矿的应用及意义[J].矿业安全与环保,2004,31(S1):145-146.
[7]董良国,马在田,曹景忠,等.一阶弹性波方程交错网格高阶差分解法[J].地球物理学报,2000,43(3):411-419.
[8]刘洋,李承楚,牟永光.任意偶数阶精度有限差分法数值模拟[J].石油地球物理勘探,1998,33(1):1-10.
[9]吴桁,刘建红,周振晓.模型正演技术在煤田复杂地质体识别中的应用[J].中国煤炭地质,2015,27(5):58-62.
[10]陈祖银.波动方程有限差分数值模拟及叠后深度偏移[D].成都:西南石油大学,2013.
[11]丁科.PML吸收边界条件影响因素分析[J].物探与化探,2012,36(4):623-627.
[12]COLLINO F,TSOGKA C.Application of the perfectly matched absorbing layer model to the linear elastodynamic problem in anisotropic heterogeneous media[J].Geophysics,2001,66(1):294-307.
[13]谢小碧,何永清,李培明.地震照明分析及其在地震采集设计中的应用[J].地球物理学报,2013,56(5):1568-1581.
[2]朱金平,董良国,程玖兵.基于地震照明、面向勘探目标的三维观测系统优化设计[J].石油地球物理勘探,2011,46(3):339-348.
[3]陈生昌,毕亚杰,林晨.地震观测系统评价的波动方程方向照明方法[J].石油地球物理勘探,2009,44(6):656-661.
[4]李佩,陈生昌,常鉴,等.基于波动理论的地震观测系统设计[J].浙江大学学报(工学版),2010,44(1):203-208.
[5]牟永光,裴正林.三维复杂介质地震数值模拟[M].北京:石油工业出版社,2005.
[6]邹春艳,高明专,吕吉春.采区地震勘探在山脚树矿的应用及意义[J].矿业安全与环保,2004,31(S1):145-146.
[7]董良国,马在田,曹景忠,等.一阶弹性波方程交错网格高阶差分解法[J].地球物理学报,2000,43(3):411-419.
[8]刘洋,李承楚,牟永光.任意偶数阶精度有限差分法数值模拟[J].石油地球物理勘探,1998,33(1):1-10.
[9]吴桁,刘建红,周振晓.模型正演技术在煤田复杂地质体识别中的应用[J].中国煤炭地质,2015,27(5):58-62.
[10]陈祖银.波动方程有限差分数值模拟及叠后深度偏移[D].成都:西南石油大学,2013.
[11]丁科.PML吸收边界条件影响因素分析[J].物探与化探,2012,36(4):623-627.
[12]COLLINO F,TSOGKA C.Application of the perfectly matched absorbing layer model to the linear elastodynamic problem in anisotropic heterogeneous media[J].Geophysics,2001,66(1):294-307.
[13]谢小碧,何永清,李培明.地震照明分析及其在地震采集设计中的应用[J].地球物理学报,2013,56(5):1568-1581.