三维地震与测井资料在多煤层对比中的应用研究
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摘要
陆相成煤环境及断陷构造特点,致使二连盆地内煤层具有层数多、间距小、厚度横向变化大、标志层少等特点,利用钻探资料进行煤层对比难度大,其结果将直接影响对煤层、煤质评价及煤炭资源量估算。考虑到研究区煤层赋存特点,利用三维地震成果,对该区进行了煤层辅助对比,其结果与原有7个钻孔煤层对比成果存在差异。通过三维地震层位对比与构造解释方案的核查,结合波阻抗反演结果和测井资料重新解释,认为三维地震的煤层对比是合理的。该实例表明,综合利用测井资料、三维地震解释和波阻抗反演等,可有效提高煤层对比的可靠性,提高煤炭资源地质勘探阶段的控制精度。
Coal seams in the Erenhot Basin have characteristics of multiple coal seams with smaller intervals,large transversal variations and lack of marker beds caused by limnic coal-forming environment and fault depression structure.It is difficult to carry out coal seams correlation only relying on drilling data,and results can directly impact coal seam,coal quality assessment and coal resource estimation.In view of coal hosting characteristics in the study area,the 3D seismic results are used in additive coal seams correlation,found out the results are different from original coal seams correlation of seven boreholes.After examination and verification of 3D seismic horizons correlation and structural interpretative version,combined with wave impedance inversion results and reinterpreted,considered that the 3D seismic coal seams correlation is reasonable.The instance has demonstrated that the integral well logging data,3D seismic interpretation and wave impedance inversion method can improve coal seams correlation reliability and control accuracy during coal resource exploration stage effectively.
Coal seams in the Erenhot Basin have characteristics of multiple coal seams with smaller intervals,large transversal variations and lack of marker beds caused by limnic coal-forming environment and fault depression structure.It is difficult to carry out coal seams correlation only relying on drilling data,and results can directly impact coal seam,coal quality assessment and coal resource estimation.In view of coal hosting characteristics in the study area,the 3D seismic results are used in additive coal seams correlation,found out the results are different from original coal seams correlation of seven boreholes.After examination and verification of 3D seismic horizons correlation and structural interpretative version,combined with wave impedance inversion results and reinterpreted,considered that the 3D seismic coal seams correlation is reasonable.The instance has demonstrated that the integral well logging data,3D seismic interpretation and wave impedance inversion method can improve coal seams correlation reliability and control accuracy during coal resource exploration stage effectively.
引文
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[5]孙义娟.内蒙古红格尔勘查区早白垩世煤层对比[J].河北煤炭,2008(2):14,42.
[6]万欣,吴绍萍.内蒙五间房煤田主要含煤段煤层综合对比[J].江西煤炭科技,2009(4):59-60,84.
[7]林建东,霍全明,吴奕峰.波阻搞约束反演技术预测煤层厚度[J].中国煤田地质,2003,15(03).
[8]刘伍,崔若飞.波阻抗反演在煤炭资源勘探中的应用[J].中国煤炭地质,2008,20(06).
[9]何光强.煤田地质勘查中煤层对比方法的探讨[J].煤炭科学技术,2009,37(6):106-109.
[10]常东,高占华,彭鸿鹄,等.测井曲线在准东煤田大井矿区一井田煤层对比中的应用[J].中国煤炭地质,2008,20(12):26-27,31.
[11]苏时才,王海清.利用测井曲线进行煤层对比及聚煤规律研究[J].煤田地质与勘探,1995,23(6):55-58.
[12]祝友联.利用测井曲线进行麦朵山煤层对比[J].陕西煤炭,2008(2):P93,102.
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[14]张玉峰.朔县平原分叉煤层对比方法的探讨[J].中国煤炭地质,2008,20(9):23-24,35.
[15]黄澎涛,武学维,马占琴.内蒙古自治区二连盆区域构造和聚煤特征[J].中国煤炭地质,2009,21(z1).
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