Seam Thickness Prediction Methods Based on the Logging Constrained Seismic Inversion
Seam Thickness Prediction Methods Based on the Logging Constrained Seismic Inversion
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发表时间：
2008
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通讯作者：
Liu Qiao-ling
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作者：
Liu Qiao-ling
为获得高精度煤层厚度，研究了测井约束反演技术，利用相关系数和地震数据切片对反演过程进行评价，生成高分辨率声阻抗，通过煤层顶底板的阻抗差识别煤层厚度变化，包括煤层的组合、分叉、减薄、压尖等，并通过时深转换计算出厚度信息。结果表明，测井实现了煤层厚度的高精度反演。约束反演，综合了纵向分辨率高的测井资料和水平面岩性信息丰富的地震资料，井位煤层厚度预测误差接近于零，远离井位位置煤层厚度预测误差在5%以下，与井预测结果相比，精度提高12.6%。
To obtain the high precision seam thickness,a logging constrained inversion technique was studied.The correlation coefficient and seismic data slice were used to evaluate the inversion process.A high resolution acoustic impedance was generated.The thickness variation of seam,including combination,branch,thinning and pinching of seam,were identified by the impedance difference of coal seam roof and floor,and the thickness information was computed by the time-to-depth conversion.The results show that a high precision inversion of seam thickness was achieved by the logging constrained inversion,which integrated the logging data with high longitudinal resolution and seismic data with abundant horizontal lithologic information.The prediction error of seam thickness is close to zero at well location and under 5% at the location far from well position.The precision was improved by 12.6% compared with the result predicted by well.