多参数岩性反演在灰岩解释中的应用
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摘要
对于煤田岩性地震勘探来说,利用密度和声速测井曲线约束的波阻抗反演是主要的方法之一。由于灰岩与围岩的波阻抗差异较小,常规波阻抗反演所获得的波阻抗信息很难识别出灰岩层位。通过对姚桥煤矿西六采区灰岩多测井曲线特征的分析,发现与围岩相比,煤层的密度较低、电阻率较高;而灰岩的视电阻率特别高。因此,在灰岩解释过程中,通过对密度曲线和视电阻率曲线进行融合,获得1条拟密度曲线,同时突出了煤层密度与灰岩的视电阻率异常。利用多参数岩性反演方法获得拟波阻抗数据体,确定出灰岩的空间分布和厚度变化,为煤矿的防治水工作提供了重要依据。
The surge impedance inversion which uses the density and acoustic velocity logging curve is one of the most important methods in coalfield seismic exploration.As the surge impedance difference between limestone and surrounding rocks is small,it is difficult to identify limestone horizon with the surge impedance information acquired from the conventional surge impedance inversion.Through the analysis on the characteristics of the multi-logging curves of the western No.6 mining district in Yaoqiao Mine,it was found that the coal seam has a lower density and a higher resistivity as compared with the surrounding rock;and the apparent resistivity of limestone is very high.Therefore,a quasi-density curve was obtained by merging the density curve with the apparent resistivity curve in limestone interpretation and the anomaly of the coal seam's density and the limestone's apparent resistivity was highlighted.The quasi-surge impedance data which were obtained with multi-parameter lithological inversion method and the spatial distribution and the thickness change of limestone which were determined with this method can provide an important basis for water prevention and control in coal mines.
The surge impedance inversion which uses the density and acoustic velocity logging curve is one of the most important methods in coalfield seismic exploration.As the surge impedance difference between limestone and surrounding rocks is small,it is difficult to identify limestone horizon with the surge impedance information acquired from the conventional surge impedance inversion.Through the analysis on the characteristics of the multi-logging curves of the western No.6 mining district in Yaoqiao Mine,it was found that the coal seam has a lower density and a higher resistivity as compared with the surrounding rock;and the apparent resistivity of limestone is very high.Therefore,a quasi-density curve was obtained by merging the density curve with the apparent resistivity curve in limestone interpretation and the anomaly of the coal seam's density and the limestone's apparent resistivity was highlighted.The quasi-surge impedance data which were obtained with multi-parameter lithological inversion method and the spatial distribution and the thickness change of limestone which were determined with this method can provide an important basis for water prevention and control in coal mines.
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.
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[3]孔炜,杨瑞召,彭苏萍.地震多属性分析在煤田拟声波三维数据体预测中的应用[J].中国矿业大学学报,2003,32(4):443-446.
[4]王远,崔若飞,孙学凯,等.利用地震反演信息划分煤体结构[J].煤田地质与勘探,2011,39(4):69-73.
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[7]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.
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[10]邹冠贵,彭苏萍,张辉,等.地震递推反演预测深部灰岩富水区研究[J].中国矿业大学学报,2009,38(3):390-395.
[2]彭苏萍,邹冠贵,李巧灵.测井约束地震反演在煤厚预测中的应用研究[J].中国矿业大学学报,2008,37(6):729-734.
[3]孔炜,杨瑞召,彭苏萍.地震多属性分析在煤田拟声波三维数据体预测中的应用[J].中国矿业大学学报,2003,32(4):443-446.
[4]王远,崔若飞,孙学凯,等.利用地震反演信息划分煤体结构[J].煤田地质与勘探,2011,39(4):69-73.
[5]彭刘亚,崔若飞,张亚兵,等.概率神经网络在地震岩性反演中的应用[J].煤田地质与勘探,2012,40(4):63-65.
[6]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.
[7]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.
[8]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.
[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]邹冠贵,彭苏萍,张辉,等.地震递推反演预测深部灰岩富水区研究[J].中国矿业大学学报,2009,38(3):390-395.
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