多参数岩性反演在煤田地震勘探中的应用
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摘要
基于模型的常规地震反演方法,利用声速或密度测井曲线进行约束从而获得波阻抗信息。但是,当目的层与围岩的波阻抗差异很小时,根据波阻抗信息很难解决层位对比问题。实际上,视电阻率、自然伽马等测井曲线可以提供其他的地层岩性信息,利用多参数进行约束反演对区分岩性更加敏锐。双测井曲线融合法将密度和视电阻率测井曲线融合、变换后得到一条拟密度曲线,该曲线同时突出了煤层与岩浆岩的密度和电阻率异常。利用该曲线进行约束,可以实现多参数岩性反演。
The method of model-based seismic inversion makes use of sound velocity logging or density logging constrains to get wave impedance inversion information.However,when the difference between the purpose layer and the surrounding rock is small,it is difficult to solve the problem of layer contrast through the information.In fact,apparent resistivity and artificial gamma logging can provide lithological information of other strata.The inversion constrained by multiple parameters has more acute effect in distinguishing lithologic characters.The method of double logging curve fusion makes use of two different logging curves to fuse and transform into a imitated density curve,which can highlight the density anomaly of coal and magmatic rocks at the same time.Multiple parameters lithological inversion can be realized by the imitated density curve constraint.
The method of model-based seismic inversion makes use of sound velocity logging or density logging constrains to get wave impedance inversion information.However,when the difference between the purpose layer and the surrounding rock is small,it is difficult to solve the problem of layer contrast through the information.In fact,apparent resistivity and artificial gamma logging can provide lithological information of other strata.The inversion constrained by multiple parameters has more acute effect in distinguishing lithologic characters.The method of double logging curve fusion makes use of two different logging curves to fuse and transform into a imitated density curve,which can highlight the density anomaly of coal and magmatic rocks at the same time.Multiple parameters lithological inversion can be realized by the imitated density curve constraint.
引文
[1]崔若飞,孙学凯,崔大尉.基于地震反演方法的奥陶系顶部含隔水层探测[J].岩石力学与工程学报,2009,28(2):319-323.
[2]钱进,崔若飞,陈同俊,等.波阻抗反演预测煤层岩浆侵入范围[J].中国煤田地质,2010,22(1):58-61.
[3]刘胜,邱其祥,程增庆,等.利用相对波阻抗识别煤层缺失变薄带[J].物探与化探,2008,32(6):682-684.
[4]李明,侯联华,邹才能,等.岩性地层油气藏地球物理勘探技术与应用[M].北京:石油工业出版社,2005:95-135.
[5]杨立强.测井约束地震反演综述[J].地球物理学进展,2003,18(3):530-534.
[6]孙淑艳,李艳菊,彭莉,等.火成岩地震识别及构造描述方法研究[J].特种油气藏,2003,10(1):47-50.
[7]张静,王彦春,赵帆,等.多参数联合反演预测致密含气砂岩[J].天然气地球科学,2008,19(6):864-869.
[8]王梦倩,赵虎.多参数曲线反演技术在圈定岩浆岩侵入煤层范围中的应用[J].江苏地质,2006,30(4):287-289.
[9]闫建平,蔡进功,赵铭海,等.测井曲线融合方法研究及其在分层中的应用[J].西安石油大学学报,2008,23(6):6-10.
[10]万应明,高峻,董建平,等.多测井曲线合成应用方法初探[J].石油物探,2005,44(1):71-75.
[11]贾丹.基于模型反演及其STRATA软件中的应用[J].内蒙古石油化工,2008,(23):122-125.
[2]钱进,崔若飞,陈同俊,等.波阻抗反演预测煤层岩浆侵入范围[J].中国煤田地质,2010,22(1):58-61.
[3]刘胜,邱其祥,程增庆,等.利用相对波阻抗识别煤层缺失变薄带[J].物探与化探,2008,32(6):682-684.
[4]李明,侯联华,邹才能,等.岩性地层油气藏地球物理勘探技术与应用[M].北京:石油工业出版社,2005:95-135.
[5]杨立强.测井约束地震反演综述[J].地球物理学进展,2003,18(3):530-534.
[6]孙淑艳,李艳菊,彭莉,等.火成岩地震识别及构造描述方法研究[J].特种油气藏,2003,10(1):47-50.
[7]张静,王彦春,赵帆,等.多参数联合反演预测致密含气砂岩[J].天然气地球科学,2008,19(6):864-869.
[8]王梦倩,赵虎.多参数曲线反演技术在圈定岩浆岩侵入煤层范围中的应用[J].江苏地质,2006,30(4):287-289.
[9]闫建平,蔡进功,赵铭海,等.测井曲线融合方法研究及其在分层中的应用[J].西安石油大学学报,2008,23(6):6-10.
[10]万应明,高峻,董建平,等.多测井曲线合成应用方法初探[J].石油物探,2005,44(1):71-75.
[11]贾丹.基于模型反演及其STRATA软件中的应用[J].内蒙古石油化工,2008,(23):122-125.
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