基于层状大地响应的异常场提取与载流环地-井TEM反演技术
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摘要
基于等效载流环的异常场反演是一种地-井瞬变电磁快速反演方法,通过等效电流环能够迅速对井中TEM数据进行处理解释,给出异常的中心位置和空间展布,但是等效载流环只能对异常场进行反演,而实测数据中往往包含较强的背景场信息,造成了等效载流环反演难以直接应用于实测数据的反演解释,针对这一实际问题提出了采用层状大地响应来模拟背景场,通过"差值法"从实测数据中减去背景场的方法实现异常场提取,结合等效载流环技术完成异常场反演,最终实现地-井TEM数据的快速定量反演解释.
Anomalous inversion method based on equivalent current is a fast borehole transient electromagnetic inversion method.According to the equivalent current,wo can can quickly accomplish borehole TEM data processing and interpretation,getting the center position and spatial distribution of anomaly. However,the equivalent current carrying only for anomalous field inversion,the measured data are contains strong background information,resulting the filaments inversion is difficult to be applied to real data inversion.In view of this practical problem,we extract anomalies through the"difference"from the measured data by subtracting the background field which used the layered earth to simulate,combined with the filaments inversion technology,finally,achieved the borehole TEM data rapid quantitative interpretation at last.
Anomalous inversion method based on equivalent current is a fast borehole transient electromagnetic inversion method.According to the equivalent current,wo can can quickly accomplish borehole TEM data processing and interpretation,getting the center position and spatial distribution of anomaly. However,the equivalent current carrying only for anomalous field inversion,the measured data are contains strong background information,resulting the filaments inversion is difficult to be applied to real data inversion.In view of this practical problem,we extract anomalies through the"difference"from the measured data by subtracting the background field which used the layered earth to simulate,combined with the filaments inversion technology,finally,achieved the borehole TEM data rapid quantitative interpretation at last.
引文
Barnett C T.1984.Simple inversion of time-domain electromagnetic data[J].Geophysics,49(7):925-933.
Chave A D.1983.Numerical integration of related Hankel transforms by quadrature and continued fraction expansion[J].Geophysics,48(12):1671-1686.
Chen X J,Ren H Z.1988.Borehole TEM response of equiaxial conductor[J].Geology and Exploration(in Chinese),11,41-45.
Coggon J H,Clarke E H.1987.The fixed receiver electromagnetic(FREM)method for drill hole surveys[J].Exploration Geophysics,18(3):305-311.
Cull L J.1996.Interpretation of primary fields in electromagnetic surveying[D].Melbourne,Monash University.
Cull L J,Asten M J,Cull J P.1998.Reflection models and ramp response for downhole TEM data[J].Exploration Geophysics,29(4):320-323.
Dai X P.2013.A research on three-dimensional response characteristic of borehole transient electromagnetic method(in Chinese)[Master's thesis].Beijing:China University of Geosciences(Beijing).
Duncan A.C.1987.Interpretation of down-hole transient EM data using current filaments[J].Exploration Geophysics,18(2):36-39.
Duncan A C.1995.Filament 2.0 for Windows(Operations Manual).EMIT,Perth.
Dyck A V,Bloore M,Vallee M A.1980.User manual for programs PLATE and SPHERE:Geophysics Laboratory,University of Toronto.
Dyck A V,West G F.1984.The role of simple computer models in interpretations of wide-band,drill-hole electromagnetic surveys in mineral exploration[J].Geophysics,49(7):957-980.
Eadie T,Staltari G.1987.Introduction to Downhole Electromagnetic Methods[J].Exploration Geophysics,18(3):247-354.
Eaton P A,Hohmann G W.1984.The influence of a conductive host on two-dimensional borehole transient electromagnetic responses[J].Geophysics,49(7):861-869.
Fullagar P K.1987.Inversion of downhole TEM data using circular current filaments[J].Exploration Geophysics,18(3):341-344.
Kerry Key.2009.1D inversion of multicomponent,multifrequency marine CSEM data:Methodology and synthetic studies for resolving thin resistive layers[J]Geophysics,74(2):F9-F20.
Li D J,Weng A H,Yang R,et al.2017.Three-dimention forward modeling and characteristics for surface-borehole transient electromagnetic by using staggered-grid finite difference method[J].Journal of Jilin University(Earth Science Edition)(in Chinese),47(5):1552-1561.
Li J H,Liu S C,Jiao X F,et al.2015.Three-Dimensional Forward Modeling for Borehole Transient Electromagnetic Model[J].Geophysical Prospecting(in Chinese),50(3):556-564.
Li J P,Li T L,Zhang H,et al.2005.Study and application of the TEMforward and inversion problem of irregular loop source over the layered medium[J].Journal of Jilin university(Earth Science Edition)(in Chinese),35(6):790-795.
Li J P,Li T L,Zhao X F,et al.2007.Study on the TEM all-time apparent resistivity of arbitrary shape loop source over the layered medium[J].Progress in Geophysics(in Chinese),22(6):1777-1779,doi:10.3969/j.issn.1004-2903.2007.06.015.
Macnae J,Staltari G.1987.Classification of sign changes in Borehole TEM decays[J].Exploration Geophysics,18(3)331-339.
Meng Q X,Hu X Y,Pan H P,et al.2017.Numerical analysis of multicomponent responses of surface-hole transient electromagnetic method[J].Applied Geophysics,14(1):175-186.
Meng Q X,Pan H P.2012.Numerical simulation analysis of surfacehole TEM responses[J].Chinese J.Geophysics.(in Chinese),55(3):1046-1053,doi:10.6038/j.issn.0001-5733.2012.03.035.
Meng Q X,Pan H P,Niu Z.2014.Forward simulation of surface-borehole TEM in geological medium effect[J].Journal of China University of Mining&Technology(in Chinese),43(6):1113-1119.
Newman G A,Hohmann G W,Anderson W L.1986.Transient electromagnetic response of a three-dimensional body in a layered earth[J].Geophysics,51(8):1608-1627.
Rai S S,Verma S K.1984.Nomograms to interpret Crone PEM data using a dipping sheet model[J].Geophysics Prospecting,32(4):740-749.
Raiche A P,Bennett L A.1987.Layered earth models using downhole electromagnetic receivers[J].Exploration Geophysics,18(3):325-329.
Richard C W,Ward S H.1988.The borehole transient electromagnetic response of a three-dimensional fracture zone in a conductive halfspace[J].Geophysics,53(11):1469-1478.
Thomas L.1987.Short note:A simple interpretation aid for downhole time?domain electromagnetic anomalies[J].Exploration Geophysics,18(3):349-351.
Verma S K,Rai S S.1982.Response of a layered earth to the Crone pulse electromagnetic system[J]Geophysics,47(1):63-70.
Wood D V.1975.A model study of the Crone borehole pulse electromagnetic(PEM)system[D].Ontario.Queen's University.
Wood D V,CRONE J D.1980.Scale model study of a borehole pulse electromagnetic system[J].CIM Bulletin,73(817):819-828.
WU J J,Li X,Zhi Q Q,et al.2017a.Analysis of three component TEMresponse characteristic of electric source dill hole TEM[J].Progress in Geophysics(in Chinese),32(3):1273-1278.
WU J J,Li X,Zhi Q Q,et al.2017b.Full field apparent resistivity definition of Borehole TEM with electric source[J].Chinese J.Geophysics(in Chinese),60(4):1595-1650,doi:10.6038/cjg20170431.
Xu X G,Xu Z Y.2017.Three-dimensional finite difference time domain simulation for down-hole transient electromagnetic method[J].Geophysical and Geochemical Exploration(in Chinese),41(3):496-504.
XU Z Y,Yang H Y,Deng J Z,et al.2015.Research on response of down-hole TEM by vertical sheet[J].Progress in Geophysics.(in Chinese),30(3):1345-1353,doi:10.6038/pg20150346.
Yang H Y,Xu Z Y,Yue J H,et al.2016a.3D inclined conductor behavior of down-hole transient electromagnetic method with overburden layer[J].Geophysical and Geochemical Exploration(in Chinese),40(1):190-196.
Yang H Y,Yue J H,Xu Z Y,et al.2016b.Transient Electromagnetic Method Modeling in Ground-Borehole Model with Overburden Influence[J].Journal of Jilin University(Earth Science Edition)(in Chinese),46(5):1527-1537.
Yang Y,Deng X H,Zhang J,et al.2014.A borehole TEM anomaly inversion method[J].Geophysical and Geochemical Exploration(in Chinese),38(4):855-859,864.
Zhang J.2009.Analysis of anomalous character and study vector intersection for down-hole transient electromagnetic method(in Chinese)[Master's thesis].Beijing:China University of Geosciences(Beijing).
Zhang J,Deng X H,Guo X,et al.2013.Typical cases of applying Borehole TEM to deep prospecting in crisis mines[J].Geophysical and Geochemical Exploration(in Chinese),37(1):30-34.
Zhang Z,Xiao J.2001.Inversions of surface and borehole data from large-loop transient electromagnetic system over a 1-D earth[J].Geophysics,66(4):1090-1096.
Zhang Z J,Yang J,Xu Z C.1986.Model test study of pulse electromagnetic method in borehole[J].Mineral and Geology(in Chinese),(3):51-57.
陈锡杰,任怀宗.1988.钻井中等轴状导体的瞬变电磁响应[J].地质与勘探,11:41-45.
戴雪平.2013.地-井瞬变电磁法三维响应特征研究[硕士论文].北京:中国地质大学(北京).
李大俊,翁爱华,杨悦,等.2017.地一井瞬变电磁三维交错网格有限差分正演及响应特性[J].吉林大学学报(地球科学版),47(5):1552-1561.
李建慧,刘树才,焦险峰,等.2015.地一井瞬变电磁法三维正演研究[J].石油地球物理勘探,50(3):556-564.
李建平,李桐林,张辉,等.2005.不规则回线源层状介质瞬变电磁场正反演研究及应用[J].吉林大学学报(地球科学版),35(6):790-795.
李建平,李桐林,赵雪峰,等.2007.层状介质任意形状回线源瞬变电磁全区视电阻率的研究[J].地球物理学进展,22(6):1777-1780,doi:10.3969/j.issn.1004-2903.2007.06.015.
孟庆鑫,潘和平.2012.地一井瞬变电磁响应特征数值模拟分析[J].地球物理学报,55(3):1046-1053,doi:10.6038/j.issn.0001-5733.2012.03.035.
孟庆鑫,潘和平,牛峥.2014.大地介质影响下地一井瞬变电磁的正演模拟分析[J].中国矿业大学学报,43(6):1113-1119.
武军杰,李琳,智庆全,等.2017a.电性源地一井瞬变电磁法三分量响应特征分析[J].地球物理学进展,32(3):1273-1278,doi:10.6038/pg20170343.
武军杰,李貅,智庆全,等.2017b.电性源地-井瞬变电磁全域视电阻率定义[J].地球物理学报,60(4):1595-1650,doi:10.6038/cjg20170431.
许新刚,徐正玉.2017.地一井瞬变电磁响应三维时域有限差分模拟[J].物探与化探,41(3):496-504.
徐正玉,杨海燕,邓居智,等.2015.基于异常场的地井瞬变电磁法正演研究[J].物探与化探,39(6):1176-1182.
徐正玉,杨海燕,邓居智,等.2015.垂直接触带影响下地-井瞬变电磁响应研究[J].地球物理学进展,30(3):1345-1353,doi:10.6038/pg20150346.
杨海燕,徐正玉,岳建华,等.2016a.覆盖层下三维板状体地-井瞬变电磁响应[J].物探与化探,40(1):190-196.
杨海燕,岳建华,徐正玉,等.2016b.覆盖层影响下典型地-井模型瞬变电磁法正演[J].吉林大学学报(地球科学版),46(5):1527-1537.
杨毅,邓晓红,张杰,等.2014.一种井中瞬变电磁异常反演方法[J].物探与化探,38(4):855-859,864.
张杰.2009.地-井瞬变电磁异常特征分析及矢量交会解释方法研究[硕士论文].北京:中国地质大学(北京).
张杰,邓晓红,郭鑫,等.2013.地-井TEM在危机矿山深部找矿中的应用实例[J].物探与化探,37(l):30-34.
张兆京,杨健,徐正超.1986.井中脉冲电磁法的模型实验研究[J].矿产与地质,3:51-57.
Chave A D.1983.Numerical integration of related Hankel transforms by quadrature and continued fraction expansion[J].Geophysics,48(12):1671-1686.
Chen X J,Ren H Z.1988.Borehole TEM response of equiaxial conductor[J].Geology and Exploration(in Chinese),11,41-45.
Coggon J H,Clarke E H.1987.The fixed receiver electromagnetic(FREM)method for drill hole surveys[J].Exploration Geophysics,18(3):305-311.
Cull L J.1996.Interpretation of primary fields in electromagnetic surveying[D].Melbourne,Monash University.
Cull L J,Asten M J,Cull J P.1998.Reflection models and ramp response for downhole TEM data[J].Exploration Geophysics,29(4):320-323.
Dai X P.2013.A research on three-dimensional response characteristic of borehole transient electromagnetic method(in Chinese)[Master's thesis].Beijing:China University of Geosciences(Beijing).
Duncan A.C.1987.Interpretation of down-hole transient EM data using current filaments[J].Exploration Geophysics,18(2):36-39.
Duncan A C.1995.Filament 2.0 for Windows(Operations Manual).EMIT,Perth.
Dyck A V,Bloore M,Vallee M A.1980.User manual for programs PLATE and SPHERE:Geophysics Laboratory,University of Toronto.
Dyck A V,West G F.1984.The role of simple computer models in interpretations of wide-band,drill-hole electromagnetic surveys in mineral exploration[J].Geophysics,49(7):957-980.
Eadie T,Staltari G.1987.Introduction to Downhole Electromagnetic Methods[J].Exploration Geophysics,18(3):247-354.
Eaton P A,Hohmann G W.1984.The influence of a conductive host on two-dimensional borehole transient electromagnetic responses[J].Geophysics,49(7):861-869.
Fullagar P K.1987.Inversion of downhole TEM data using circular current filaments[J].Exploration Geophysics,18(3):341-344.
Kerry Key.2009.1D inversion of multicomponent,multifrequency marine CSEM data:Methodology and synthetic studies for resolving thin resistive layers[J]Geophysics,74(2):F9-F20.
Li D J,Weng A H,Yang R,et al.2017.Three-dimention forward modeling and characteristics for surface-borehole transient electromagnetic by using staggered-grid finite difference method[J].Journal of Jilin University(Earth Science Edition)(in Chinese),47(5):1552-1561.
Li J H,Liu S C,Jiao X F,et al.2015.Three-Dimensional Forward Modeling for Borehole Transient Electromagnetic Model[J].Geophysical Prospecting(in Chinese),50(3):556-564.
Li J P,Li T L,Zhang H,et al.2005.Study and application of the TEMforward and inversion problem of irregular loop source over the layered medium[J].Journal of Jilin university(Earth Science Edition)(in Chinese),35(6):790-795.
Li J P,Li T L,Zhao X F,et al.2007.Study on the TEM all-time apparent resistivity of arbitrary shape loop source over the layered medium[J].Progress in Geophysics(in Chinese),22(6):1777-1779,doi:10.3969/j.issn.1004-2903.2007.06.015.
Macnae J,Staltari G.1987.Classification of sign changes in Borehole TEM decays[J].Exploration Geophysics,18(3)331-339.
Meng Q X,Hu X Y,Pan H P,et al.2017.Numerical analysis of multicomponent responses of surface-hole transient electromagnetic method[J].Applied Geophysics,14(1):175-186.
Meng Q X,Pan H P.2012.Numerical simulation analysis of surfacehole TEM responses[J].Chinese J.Geophysics.(in Chinese),55(3):1046-1053,doi:10.6038/j.issn.0001-5733.2012.03.035.
Meng Q X,Pan H P,Niu Z.2014.Forward simulation of surface-borehole TEM in geological medium effect[J].Journal of China University of Mining&Technology(in Chinese),43(6):1113-1119.
Newman G A,Hohmann G W,Anderson W L.1986.Transient electromagnetic response of a three-dimensional body in a layered earth[J].Geophysics,51(8):1608-1627.
Rai S S,Verma S K.1984.Nomograms to interpret Crone PEM data using a dipping sheet model[J].Geophysics Prospecting,32(4):740-749.
Raiche A P,Bennett L A.1987.Layered earth models using downhole electromagnetic receivers[J].Exploration Geophysics,18(3):325-329.
Richard C W,Ward S H.1988.The borehole transient electromagnetic response of a three-dimensional fracture zone in a conductive halfspace[J].Geophysics,53(11):1469-1478.
Thomas L.1987.Short note:A simple interpretation aid for downhole time?domain electromagnetic anomalies[J].Exploration Geophysics,18(3):349-351.
Verma S K,Rai S S.1982.Response of a layered earth to the Crone pulse electromagnetic system[J]Geophysics,47(1):63-70.
Wood D V.1975.A model study of the Crone borehole pulse electromagnetic(PEM)system[D].Ontario.Queen's University.
Wood D V,CRONE J D.1980.Scale model study of a borehole pulse electromagnetic system[J].CIM Bulletin,73(817):819-828.
WU J J,Li X,Zhi Q Q,et al.2017a.Analysis of three component TEMresponse characteristic of electric source dill hole TEM[J].Progress in Geophysics(in Chinese),32(3):1273-1278.
WU J J,Li X,Zhi Q Q,et al.2017b.Full field apparent resistivity definition of Borehole TEM with electric source[J].Chinese J.Geophysics(in Chinese),60(4):1595-1650,doi:10.6038/cjg20170431.
Xu X G,Xu Z Y.2017.Three-dimensional finite difference time domain simulation for down-hole transient electromagnetic method[J].Geophysical and Geochemical Exploration(in Chinese),41(3):496-504.
XU Z Y,Yang H Y,Deng J Z,et al.2015.Research on response of down-hole TEM by vertical sheet[J].Progress in Geophysics.(in Chinese),30(3):1345-1353,doi:10.6038/pg20150346.
Yang H Y,Xu Z Y,Yue J H,et al.2016a.3D inclined conductor behavior of down-hole transient electromagnetic method with overburden layer[J].Geophysical and Geochemical Exploration(in Chinese),40(1):190-196.
Yang H Y,Yue J H,Xu Z Y,et al.2016b.Transient Electromagnetic Method Modeling in Ground-Borehole Model with Overburden Influence[J].Journal of Jilin University(Earth Science Edition)(in Chinese),46(5):1527-1537.
Yang Y,Deng X H,Zhang J,et al.2014.A borehole TEM anomaly inversion method[J].Geophysical and Geochemical Exploration(in Chinese),38(4):855-859,864.
Zhang J.2009.Analysis of anomalous character and study vector intersection for down-hole transient electromagnetic method(in Chinese)[Master's thesis].Beijing:China University of Geosciences(Beijing).
Zhang J,Deng X H,Guo X,et al.2013.Typical cases of applying Borehole TEM to deep prospecting in crisis mines[J].Geophysical and Geochemical Exploration(in Chinese),37(1):30-34.
Zhang Z,Xiao J.2001.Inversions of surface and borehole data from large-loop transient electromagnetic system over a 1-D earth[J].Geophysics,66(4):1090-1096.
Zhang Z J,Yang J,Xu Z C.1986.Model test study of pulse electromagnetic method in borehole[J].Mineral and Geology(in Chinese),(3):51-57.
陈锡杰,任怀宗.1988.钻井中等轴状导体的瞬变电磁响应[J].地质与勘探,11:41-45.
戴雪平.2013.地-井瞬变电磁法三维响应特征研究[硕士论文].北京:中国地质大学(北京).
李大俊,翁爱华,杨悦,等.2017.地一井瞬变电磁三维交错网格有限差分正演及响应特性[J].吉林大学学报(地球科学版),47(5):1552-1561.
李建慧,刘树才,焦险峰,等.2015.地一井瞬变电磁法三维正演研究[J].石油地球物理勘探,50(3):556-564.
李建平,李桐林,张辉,等.2005.不规则回线源层状介质瞬变电磁场正反演研究及应用[J].吉林大学学报(地球科学版),35(6):790-795.
李建平,李桐林,赵雪峰,等.2007.层状介质任意形状回线源瞬变电磁全区视电阻率的研究[J].地球物理学进展,22(6):1777-1780,doi:10.3969/j.issn.1004-2903.2007.06.015.
孟庆鑫,潘和平.2012.地一井瞬变电磁响应特征数值模拟分析[J].地球物理学报,55(3):1046-1053,doi:10.6038/j.issn.0001-5733.2012.03.035.
孟庆鑫,潘和平,牛峥.2014.大地介质影响下地一井瞬变电磁的正演模拟分析[J].中国矿业大学学报,43(6):1113-1119.
武军杰,李琳,智庆全,等.2017a.电性源地一井瞬变电磁法三分量响应特征分析[J].地球物理学进展,32(3):1273-1278,doi:10.6038/pg20170343.
武军杰,李貅,智庆全,等.2017b.电性源地-井瞬变电磁全域视电阻率定义[J].地球物理学报,60(4):1595-1650,doi:10.6038/cjg20170431.
许新刚,徐正玉.2017.地一井瞬变电磁响应三维时域有限差分模拟[J].物探与化探,41(3):496-504.
徐正玉,杨海燕,邓居智,等.2015.基于异常场的地井瞬变电磁法正演研究[J].物探与化探,39(6):1176-1182.
徐正玉,杨海燕,邓居智,等.2015.垂直接触带影响下地-井瞬变电磁响应研究[J].地球物理学进展,30(3):1345-1353,doi:10.6038/pg20150346.
杨海燕,徐正玉,岳建华,等.2016a.覆盖层下三维板状体地-井瞬变电磁响应[J].物探与化探,40(1):190-196.
杨海燕,岳建华,徐正玉,等.2016b.覆盖层影响下典型地-井模型瞬变电磁法正演[J].吉林大学学报(地球科学版),46(5):1527-1537.
杨毅,邓晓红,张杰,等.2014.一种井中瞬变电磁异常反演方法[J].物探与化探,38(4):855-859,864.
张杰.2009.地-井瞬变电磁异常特征分析及矢量交会解释方法研究[硕士论文].北京:中国地质大学(北京).
张杰,邓晓红,郭鑫,等.2013.地-井TEM在危机矿山深部找矿中的应用实例[J].物探与化探,37(l):30-34.
张兆京,杨健,徐正超.1986.井中脉冲电磁法的模型实验研究[J].矿产与地质,3:51-57.