民丰凹陷大地电磁探测研究
|
摘要
利用"深部探测技术与试验研究(SinoProbe)"项目在塔里木盆地东南边缘民丰凹陷37°N、84°E建立的大地电磁标准点实测数据,对民丰凹陷深部电性结构进行了研究。采用Robust方法对实测数据进行处理,并进行极化模式识别、静校正、二维偏离度及磁感应矢量分析,最终采用非线性共轭梯度法(NLCG)对该测区的两条剖面进行了带地形的二维反演。通过对反演结果的分析可知,民丰凹陷地下结构具有较好的电性分层,结合塔东南区域地质概况,推测其莫霍面深度约为41~43km,并且推测基底发育两条断层(F1、F2)。另外通过计算民丰凹陷地壳构造特征参数得出该区地壳结构适宜油气成藏,烃源岩发育,但成熟度不高,属于一般油气区。
We analyze deep conductivity structures based on MT data acquired at standard points(36°N84°E)in Minfeng Sag,southeast Tarim Basin,which is a part of SinoProbe project.First we process MT data with the Robust method,and then carry out polarization pattern recognition,static corrections,and 2D-approximator and induction arrow vector analysis.Finally,we conduct 2Dinversion of two profiles with nonlinear conjugate gradient(NLCG).The inversion results show that the subsurface in Minfeng Sag possesses good electrical layered structures.According to the regional geological conditions,we conclude that the Moho depth is about 41 to 43km and 2faults exist above the basement. Crustal structures of Minfeng Sag might be suitable for hydrocarbon accumulation based on crustal tectonic characteristic parameter calculation.Hydrocarbon source rock might be developed,but its maturity could not be high.
We analyze deep conductivity structures based on MT data acquired at standard points(36°N84°E)in Minfeng Sag,southeast Tarim Basin,which is a part of SinoProbe project.First we process MT data with the Robust method,and then carry out polarization pattern recognition,static corrections,and 2D-approximator and induction arrow vector analysis.Finally,we conduct 2Dinversion of two profiles with nonlinear conjugate gradient(NLCG).The inversion results show that the subsurface in Minfeng Sag possesses good electrical layered structures.According to the regional geological conditions,we conclude that the Moho depth is about 41 to 43km and 2faults exist above the basement. Crustal structures of Minfeng Sag might be suitable for hydrocarbon accumulation based on crustal tectonic characteristic parameter calculation.Hydrocarbon source rock might be developed,but its maturity could not be high.
引文
[1]何登发,白武明,孟庆任.塔里木盆地地球动力学演化与含油气系统旋回.地球物理学报,1998,41(增刊):77-87.He Dengfa,Bai Wuming,Meng Qingren.Geodynamic evolution and petroleum system cycle of Tarim basin.Acta Geophysica Sinica,1998,41(S):77-87.
[2]郑剑东,邵学钟,殷秀华.塔里木盆地深部探测的地质解释∥中国地震学会第五次学术大会论文摘要集.北京:地震出版社,1994,126.
[3]邵学钟,徐树宝,周东延.塔里木盆地地壳结构特征.石油勘探与开发,1997,24(2):1-5.Shao Xuezhong,Xu Shubao,Zhou Dongyan.Structural feature of earth crust in Tarim basin.Petroleum Exploration and Development,1997,24(2):1-5.
[4]殷秀华,黎益仕,刘占坡.塔里木盆地重力场与地壳上地幔结构.地震地质,1998,20(4):370-378.Yin Xiuhua,Li Yishi,Liu Zhanpo.Gravity field and crust-upper mantle structure over the Tarim baisin.Seismology and Geology,1998,20(4):370-378.
[5]李秋生,高锐,卢德源等.塔里木地壳俯冲在西昆仑山之下——宽角地震测量的证据.地球学报,2002,20(5):442-450.Li Qiusheng,Gao Rui,Lu Deyuan et al.Tarim crustal subduction in the west Kunlun mountains-the evidence of wide-angle seismic survey.Acta Geoscientica Sinica,2002,23(5):442-450.
[6]姜迪迪,江为为,胥颐等.中国西部地区地壳结构特征与强震活动相关性研究.地球物理学报,2014,57(12):4029-4040.Jiang Didi,Jiang Weiwei,Xu Yi et al.Characteristics of crustal structure and their relation with major earthquakes in western China.Chinese Journal of Geophysics,2014,57(12):4029-4040.
[7]许炳如.根据航磁解释的塔里木盆地基岩分布.西安石油学院学报,1997,12(6):8-11.Xu Bingru.Basement rock distribution in Talimu basin inferred from aeromagnetic data.Journal of Xi'an Shiyou University,1997,12(6):8-11.
[8]刘占坡,殷秀华,黎益仕.塔里木盆地深部构造特征∥1994年中国地球物理学会第十届学术年会论文集.北京:地震出版社,1994,115.
[9]王步清,潘中正,郭群英等.塔东南构造演化和上新世以来的构造格架.新疆石油地质,2007,28(6):704-706.Wang Buqing,Pan Zhongzheng,Guo Qunying et al.Structural evolution and structural framework since Pliocene in southeast Tarim basin.Xinjiang Petroleum Geology,2007,28(6):704-706.
[10]潘中正,郭群英,王步清等.塔东南地区构造单元划分新方案.新疆石油地质,2007,28(6):781-783.Pan Zhongzheng,Guo Qunying,Wang Buqing et al.A discussion on division of tectonic units of southeastern Tarim basin.Xinjiang Petroleum Geology,2007,28(6):781-783.
[11]周新源,罗金海,王清华.塔里木盆地南缘冲断带构造特征及其油气地质特征.中国科学(D辑),2004,34(增刊):56-62.Zhou Xinyuan,Luo Jinhai,Wang Qinghua.The thrust zone tectonic characteristics and geological features of oil-gas on the southern margin of the Tarim basin.Scientia Sinica Terrae,2004,34(S):56-62.
[12]温声明,丁长辉,刘兴晓等.塔里木盆地塔东南缘地区构造特征.石油地球物理勘探,2005,40(增刊):19-24.Wen Shengming,Ding Changhui,Liu Xingxiao.The tectonic characteristics of the southeastern Tarim basin.OGP,2005,40(S):19-24.
[13]邵学钟,张家茹,殷秀华.油气勘探与地壳深部构造研究.石油勘探与开发,1999,26(2):11-14.Shao Xuezhong,Zhang Jiaru,Yin Xiuhua.Oil-gas exploration and study of deep crustal structure.Petroleum Exploration and Development,1999,26(2):11-14.
[14]Simon L K.Crustal thinning and nature of extension in the northern North Sea from deep sismic reflection profiling.Tectonics,1988,7(4):803-821.
[15]程裕淇.中国区域地质概论.北京:地质出版社,1994:152-153.
[16]刘宏.塔东南坳陷石油地质研究及远景目标评价[学位论文].四川成都:成都理工大学,2005.
[17]董树文,李廷栋.Sinoprobe-中国深部探测实验.地质学报,2009,83(7):895-909.Dong Shuwen,Li Tingdong.SinoProbe:the exploration of the deep interior beneath the Chinese continent.Acta Geologica Sinica,2009,83(7):895-909.
[18]程远志,胡祥云,王程.45°N 86°E大地电磁参数标准点建设方法研究.工程地球物理学报,2011,8(5):515-520.Cheng Yuanzhi,Hu Xiangyun,Wang Cheng.Construction method of magnetotelluric parameter standard point 45°N 86°E.Chinese Journal of Engineering Geophysics,2011,8(5):515-520.
[19]刘殿秘.松辽盆地及其周围典型盆地部分地球物理特征[学位论文].吉林长春:吉林大学,2008.
[20]詹艳.青藏高原东北缘地区深部电性结构及构造涵义[学位论文].北京:中国地震局地质研究所,2008,33-36.
[21]陈乐寿,刘国栋.大地电磁测深研究.北京:地震出版社,1985.
[22]陈小斌,赵国泽,詹艳等.磁倾子矢量的图示分析及其应用研究.地学前缘,2004,11(4):626-636.Chen Xiaobin,Zhao Guoze,Zhan Yan et al.Analysis of tipper visual vectors and its application.Earth Science Frontiers,2004,11(4):626-636.
[23]Groot-Hedlin C D,Constable S C.Occam's inversion to generate smooth,two-dimensional models from magnetotelluric data.Geophysics,1990,55(12):1613-1624.
[24]Smith J T,Booker J R.Rapid inversion of two and three-dimensional magnetotelluric data.Geophys.Res,1991,96(5):3905-3922.
[25]叶益信,胡祥云,邓居智等.SBI与RRI结合的MT二维反演方法研究.第十届中国国际地球电磁学术讨论会,2011,237-240.
[26]Rodi W L,Mackie R L.Nonlinear conjugate gradients algorithm for 2D magnetotelluric inversion.Geophysics,2001,66(1):174-187.
[27]胡祖志,胡祥云,何展翔.大地电磁非线性共轭梯度拟三维反演.地球物理学报,2006,49(4):1226-1234.Hu Zuzhi,Hu Xiangyun,He Zhanxiang.Pseudothree-dimensional magnetotelluric inversion using nonlinear conjugate gradients.Chinese Journal of Geophysics,2006,49(4):1226-1234.
[28]韩波,胡祥云,何展翔等.大地电磁反演方法的数学分类.石油地球物理勘探,2012,47(1),177-187.Han Bo,Hu Xiangyun,He Zhanxiang et al.Mathematical classification of magnetotelluric inversion methods.OGP,2012,47(1):177-187.
[29]管贻亮,李予国,胡祖志等.大地电磁非线性共轭梯度一维反演.石油物探,2014,53(6):752-759.Guan Yiliang,Li Yuguo,Hu Zuzhi et al.Nonlinear conjugate gradients algorithm for 1D magnetotelluric inversion.GPP,2014,53(6):752-759.
[30]Siripunvaraporn W,Egbert G.An efficient data-subspace inversion method for 2-D magnetotelluric data.Geophysics,2000,65(3):791-803.
[31]胡祖志,胡祥云,吴文鹂等.大地电磁二维反演方法对比研究.煤田地质与勘探,2005,33(1):65-69.Hu Zuzhi,Hu Xiangyun,Wu Wenli et al.Compared study of two-dimensional magnetotelluric inversion methods.Coal Geology&Exploration,2005,33(1):65-69.
[32]韩骑,胡祥云,程正璞等.自适应非结构有限元MT二维起伏地形正反演研究.地球物理学报,2015,58(12):4675-4684.Han Qi,Hu Xiangyun,Cheng Zhengpu et al.A study of two-dimensional MT inversion with steep topography using the adaptive unstuctured finite element method.Chinese Journal of Geophysics,2015,58(12):4675-4684.
[33]Unsworth M.Studying continental dynamics with magnetotelluric exploration.Earth Science Frontiers,2003,10(1):25-38.
[34]徐鸣洁,王良书,钟楷等.塔里木盆地重磁场特征与基底结构分析.高校地质学报,2005,11(4):585-592.Xu Mingjie,Wang Liangshu,Zhong Kai et al.Features of gravitational and magnetic fields in the Tarim basin and basement struture analysis.Geological Journal of China Universities,2005,11(4):585-592.
[35]张恺.论塔里木盆地类型、演化特征及含油气远景评价.石油与天然气地质,1990,11(1):1-15.Zhang Kai.On the basin type,evolution feature and petroleum potential of Tarim basin.Oil&Gas Geology,1990,11(1):1-15.
[36]蒲仁海,车自成,任战利.塔里木盆地东南部构造特征与油气远景.石油实验地质,1995,17(3):249-258.Pu Renhai,Che Zicheng,Ren Zhanli.Tectonic characteristics and hydrocarbon prospects of southeast Tarim basin.Experimental Petroleum Geology,1995,17(3):249-258.
[37]鲁新便,杨林.新疆塔里木盆地及邻区深部岩石圈结构特征.新疆地质,1996,14(4):289-296.Lu Xinbian,YangLin.Deep-seated lithospheric structrue of Tarim basin and neighboring area of Xinjiang.Xinjiang Geology,1996,14(4):289-296.
[38]董浩,魏文博,叶高峰等.基于有限差分正演的带地形三维大地电磁反演方法.地球物理学报,2014,57(3):939-952.Dong Hao,Wei Wenbo,Ye Gaofeng et al.Study of three-dimensional magnetotelluric inversion including surface topography based on finite-difference method.Chinese Journal of Geophysics,2014,57(3):939-952.
[2]郑剑东,邵学钟,殷秀华.塔里木盆地深部探测的地质解释∥中国地震学会第五次学术大会论文摘要集.北京:地震出版社,1994,126.
[3]邵学钟,徐树宝,周东延.塔里木盆地地壳结构特征.石油勘探与开发,1997,24(2):1-5.Shao Xuezhong,Xu Shubao,Zhou Dongyan.Structural feature of earth crust in Tarim basin.Petroleum Exploration and Development,1997,24(2):1-5.
[4]殷秀华,黎益仕,刘占坡.塔里木盆地重力场与地壳上地幔结构.地震地质,1998,20(4):370-378.Yin Xiuhua,Li Yishi,Liu Zhanpo.Gravity field and crust-upper mantle structure over the Tarim baisin.Seismology and Geology,1998,20(4):370-378.
[5]李秋生,高锐,卢德源等.塔里木地壳俯冲在西昆仑山之下——宽角地震测量的证据.地球学报,2002,20(5):442-450.Li Qiusheng,Gao Rui,Lu Deyuan et al.Tarim crustal subduction in the west Kunlun mountains-the evidence of wide-angle seismic survey.Acta Geoscientica Sinica,2002,23(5):442-450.
[6]姜迪迪,江为为,胥颐等.中国西部地区地壳结构特征与强震活动相关性研究.地球物理学报,2014,57(12):4029-4040.Jiang Didi,Jiang Weiwei,Xu Yi et al.Characteristics of crustal structure and their relation with major earthquakes in western China.Chinese Journal of Geophysics,2014,57(12):4029-4040.
[7]许炳如.根据航磁解释的塔里木盆地基岩分布.西安石油学院学报,1997,12(6):8-11.Xu Bingru.Basement rock distribution in Talimu basin inferred from aeromagnetic data.Journal of Xi'an Shiyou University,1997,12(6):8-11.
[8]刘占坡,殷秀华,黎益仕.塔里木盆地深部构造特征∥1994年中国地球物理学会第十届学术年会论文集.北京:地震出版社,1994,115.
[9]王步清,潘中正,郭群英等.塔东南构造演化和上新世以来的构造格架.新疆石油地质,2007,28(6):704-706.Wang Buqing,Pan Zhongzheng,Guo Qunying et al.Structural evolution and structural framework since Pliocene in southeast Tarim basin.Xinjiang Petroleum Geology,2007,28(6):704-706.
[10]潘中正,郭群英,王步清等.塔东南地区构造单元划分新方案.新疆石油地质,2007,28(6):781-783.Pan Zhongzheng,Guo Qunying,Wang Buqing et al.A discussion on division of tectonic units of southeastern Tarim basin.Xinjiang Petroleum Geology,2007,28(6):781-783.
[11]周新源,罗金海,王清华.塔里木盆地南缘冲断带构造特征及其油气地质特征.中国科学(D辑),2004,34(增刊):56-62.Zhou Xinyuan,Luo Jinhai,Wang Qinghua.The thrust zone tectonic characteristics and geological features of oil-gas on the southern margin of the Tarim basin.Scientia Sinica Terrae,2004,34(S):56-62.
[12]温声明,丁长辉,刘兴晓等.塔里木盆地塔东南缘地区构造特征.石油地球物理勘探,2005,40(增刊):19-24.Wen Shengming,Ding Changhui,Liu Xingxiao.The tectonic characteristics of the southeastern Tarim basin.OGP,2005,40(S):19-24.
[13]邵学钟,张家茹,殷秀华.油气勘探与地壳深部构造研究.石油勘探与开发,1999,26(2):11-14.Shao Xuezhong,Zhang Jiaru,Yin Xiuhua.Oil-gas exploration and study of deep crustal structure.Petroleum Exploration and Development,1999,26(2):11-14.
[14]Simon L K.Crustal thinning and nature of extension in the northern North Sea from deep sismic reflection profiling.Tectonics,1988,7(4):803-821.
[15]程裕淇.中国区域地质概论.北京:地质出版社,1994:152-153.
[16]刘宏.塔东南坳陷石油地质研究及远景目标评价[学位论文].四川成都:成都理工大学,2005.
[17]董树文,李廷栋.Sinoprobe-中国深部探测实验.地质学报,2009,83(7):895-909.Dong Shuwen,Li Tingdong.SinoProbe:the exploration of the deep interior beneath the Chinese continent.Acta Geologica Sinica,2009,83(7):895-909.
[18]程远志,胡祥云,王程.45°N 86°E大地电磁参数标准点建设方法研究.工程地球物理学报,2011,8(5):515-520.Cheng Yuanzhi,Hu Xiangyun,Wang Cheng.Construction method of magnetotelluric parameter standard point 45°N 86°E.Chinese Journal of Engineering Geophysics,2011,8(5):515-520.
[19]刘殿秘.松辽盆地及其周围典型盆地部分地球物理特征[学位论文].吉林长春:吉林大学,2008.
[20]詹艳.青藏高原东北缘地区深部电性结构及构造涵义[学位论文].北京:中国地震局地质研究所,2008,33-36.
[21]陈乐寿,刘国栋.大地电磁测深研究.北京:地震出版社,1985.
[22]陈小斌,赵国泽,詹艳等.磁倾子矢量的图示分析及其应用研究.地学前缘,2004,11(4):626-636.Chen Xiaobin,Zhao Guoze,Zhan Yan et al.Analysis of tipper visual vectors and its application.Earth Science Frontiers,2004,11(4):626-636.
[23]Groot-Hedlin C D,Constable S C.Occam's inversion to generate smooth,two-dimensional models from magnetotelluric data.Geophysics,1990,55(12):1613-1624.
[24]Smith J T,Booker J R.Rapid inversion of two and three-dimensional magnetotelluric data.Geophys.Res,1991,96(5):3905-3922.
[25]叶益信,胡祥云,邓居智等.SBI与RRI结合的MT二维反演方法研究.第十届中国国际地球电磁学术讨论会,2011,237-240.
[26]Rodi W L,Mackie R L.Nonlinear conjugate gradients algorithm for 2D magnetotelluric inversion.Geophysics,2001,66(1):174-187.
[27]胡祖志,胡祥云,何展翔.大地电磁非线性共轭梯度拟三维反演.地球物理学报,2006,49(4):1226-1234.Hu Zuzhi,Hu Xiangyun,He Zhanxiang.Pseudothree-dimensional magnetotelluric inversion using nonlinear conjugate gradients.Chinese Journal of Geophysics,2006,49(4):1226-1234.
[28]韩波,胡祥云,何展翔等.大地电磁反演方法的数学分类.石油地球物理勘探,2012,47(1),177-187.Han Bo,Hu Xiangyun,He Zhanxiang et al.Mathematical classification of magnetotelluric inversion methods.OGP,2012,47(1):177-187.
[29]管贻亮,李予国,胡祖志等.大地电磁非线性共轭梯度一维反演.石油物探,2014,53(6):752-759.Guan Yiliang,Li Yuguo,Hu Zuzhi et al.Nonlinear conjugate gradients algorithm for 1D magnetotelluric inversion.GPP,2014,53(6):752-759.
[30]Siripunvaraporn W,Egbert G.An efficient data-subspace inversion method for 2-D magnetotelluric data.Geophysics,2000,65(3):791-803.
[31]胡祖志,胡祥云,吴文鹂等.大地电磁二维反演方法对比研究.煤田地质与勘探,2005,33(1):65-69.Hu Zuzhi,Hu Xiangyun,Wu Wenli et al.Compared study of two-dimensional magnetotelluric inversion methods.Coal Geology&Exploration,2005,33(1):65-69.
[32]韩骑,胡祥云,程正璞等.自适应非结构有限元MT二维起伏地形正反演研究.地球物理学报,2015,58(12):4675-4684.Han Qi,Hu Xiangyun,Cheng Zhengpu et al.A study of two-dimensional MT inversion with steep topography using the adaptive unstuctured finite element method.Chinese Journal of Geophysics,2015,58(12):4675-4684.
[33]Unsworth M.Studying continental dynamics with magnetotelluric exploration.Earth Science Frontiers,2003,10(1):25-38.
[34]徐鸣洁,王良书,钟楷等.塔里木盆地重磁场特征与基底结构分析.高校地质学报,2005,11(4):585-592.Xu Mingjie,Wang Liangshu,Zhong Kai et al.Features of gravitational and magnetic fields in the Tarim basin and basement struture analysis.Geological Journal of China Universities,2005,11(4):585-592.
[35]张恺.论塔里木盆地类型、演化特征及含油气远景评价.石油与天然气地质,1990,11(1):1-15.Zhang Kai.On the basin type,evolution feature and petroleum potential of Tarim basin.Oil&Gas Geology,1990,11(1):1-15.
[36]蒲仁海,车自成,任战利.塔里木盆地东南部构造特征与油气远景.石油实验地质,1995,17(3):249-258.Pu Renhai,Che Zicheng,Ren Zhanli.Tectonic characteristics and hydrocarbon prospects of southeast Tarim basin.Experimental Petroleum Geology,1995,17(3):249-258.
[37]鲁新便,杨林.新疆塔里木盆地及邻区深部岩石圈结构特征.新疆地质,1996,14(4):289-296.Lu Xinbian,YangLin.Deep-seated lithospheric structrue of Tarim basin and neighboring area of Xinjiang.Xinjiang Geology,1996,14(4):289-296.
[38]董浩,魏文博,叶高峰等.基于有限差分正演的带地形三维大地电磁反演方法.地球物理学报,2014,57(3):939-952.Dong Hao,Wei Wenbo,Ye Gaofeng et al.Study of three-dimensional magnetotelluric inversion including surface topography based on finite-difference method.Chinese Journal of Geophysics,2014,57(3):939-952.