利用合成地震波振幅预测煤层厚度及其方法研究
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摘要
为了更精确预测煤层厚度变化,分析了波阻抗反演与煤厚的相关性,对测井资料和反演后的合成地震波振幅进行线性回归,建立了原生煤的正演模型.将该模型应用到非井点的地震属性上,利用同位协同克里金方法实现了对淮北桃园矿区煤层厚度的预测,结果与已知钻孔探测资料十分吻合,证明了利用地震振幅预测煤厚以及分类正演模型是可行的.
To predict the thickness change of the coal seam more accurately,the correlation of impedance inversion and coal thickness were analyzed.Through linear regression with log data and inverted synthetic seismic amplitude,the original coal forward model was established,which was applied in predicting the thickness of coal seams with collocated kriging in Taoyuan coal mining area,Huaibei.The prediction error of seam thickness was close to zero at well location.The result showed that classified forward model and the coal thickness predict technique by the seismic amplitude is feasible.
To predict the thickness change of the coal seam more accurately,the correlation of impedance inversion and coal thickness were analyzed.Through linear regression with log data and inverted synthetic seismic amplitude,the original coal forward model was established,which was applied in predicting the thickness of coal seams with collocated kriging in Taoyuan coal mining area,Huaibei.The prediction error of seam thickness was close to zero at well location.The result showed that classified forward model and the coal thickness predict technique by the seismic amplitude is feasible.
引文
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[2]Campman X,Riyanti C D.Non-linear inversion of scattered seismicsurfacewaves[J].GeophysicalJournalInternational,2007,171(3):1118-1125.
[3]Saunders J H,Herwanger J V,Pain C C,et al.Constrained resistivityinversion using seismic data[J].Geophysical Journal International,2005,160(3):785-796.
[4]Jianchun D,Snyder F,Gillespie D,et al.Exploration for gas hydrates inthe deepwater,northern Gulf of Mexico.I.A seismic approach based ongeologic model,inversion,and rock physics principles[J].Marine andPetroleum Geology,2008,25(9):830-844.
[5]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.Kong W,Yang R Z,Peng S P.Application for seismic multi-attributeanalysis in predicting 3D pseudo sonic logging cube of coalfield[J].Journal of China University of Mining&Technology,2003,32(4):443-446.
[6]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):729-733.Peng S P,Zou G G,Li Q L.Seam thickness prediction pethods based onthe logging constrained seismic inversion[J].Journal of China Universityof Mining&Technology,2008,37(6):729-733.
[7]林建东,张兴平.反演技术在解决煤层顶板岩性应用中的几个重要环节[J].中国煤炭地质,2008,20(11):53-54,80.Lin J D,Zhang X P.Several important links in application of inversiontechnology to predict coal roof ithology[J].Coal Geology of China,2008,20(11):53-54,80.
[8]Xu M H,Zhu X W,Wang D M,et al.Seismic reservoir inversion andprediction technique for the block Su-5,Sulige gas field[J].Natural GasIndustry,2007,27(12):33-35.
[9]刘文岭,夏海英.同位协同克里金方法在储层横向预测中的应用[J].勘探地球物理进展,2004,27(5):367-370.Liu W L,Xia H Y.The application of collocated cokriging in reservoirprediction[J].Progress in exploration geophysics,2004,27(5):367-370.
[10]李少华,张昌民,胡爱梅,等.煤储层孔隙度的协同模拟[J].煤炭学报,2007,32(9):980-983.Li S H,Zhang C M,Hu A M,et al.Building porosity model of coalbedusing collocated cokriging[J].Journal of China Coal Society,2007,32(9):980-983.
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