利用古地磁学研究岩心古水流的方法与应用——以延长油田西南部延长组为例
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摘要
古水流向对于油气的勘探与开发具有重要意义。古地磁方法是研究岩心古水流向的一种手段。文中在利用古地磁方法进行钻井岩心重定向的基础上,分析磁化率长轴方位,进而达到确定古水流方向的目的。以延长油田西南部延长组钻井岩心研究为例,首先通过热退磁分离黏滞剩磁进行岩心定向,再进行磁化率测试,计算分析最长轴方位,进而得到古水流方向。结果表明,该区储层砂体的展布方向为NW—SE,亦有来自NE—SW向和近EW向。同时,这一结果还验证了古地磁分析古水流方法的可靠性,为油气田的勘探开发提供了依据。
The redirection of drilling cores is studied using paleomagnetism, and the method and application of magnetic fabric is used to quantitatively determine the paleocurrent. By using the viscous remanence and original residual magnetism separated by thermal demagnetization, the drilling cores are redirected with low temperature component resultant vector. The anisotropy of magnetic susceptibility of rock is analyzed and tested to study the rock depositional environment information and establish the palaeocurrent direction and the direction of sand body distribution. At the same time, this method is used to study the cores from six wells of southwest Yanchang Oilfield. The results show that the distribution direction of reservoir sand bodies in this area is NW-SE,also having NE-SW and nearly E-W. The operation of this method that the redirection of cores and the direction analysis of paleocurrent is simple, quick and less expensive, Study of Yanchang Formation verifies the feasibility and reliability of the method application.
The redirection of drilling cores is studied using paleomagnetism, and the method and application of magnetic fabric is used to quantitatively determine the paleocurrent. By using the viscous remanence and original residual magnetism separated by thermal demagnetization, the drilling cores are redirected with low temperature component resultant vector. The anisotropy of magnetic susceptibility of rock is analyzed and tested to study the rock depositional environment information and establish the palaeocurrent direction and the direction of sand body distribution. At the same time, this method is used to study the cores from six wells of southwest Yanchang Oilfield. The results show that the distribution direction of reservoir sand bodies in this area is NW-SE,also having NE-SW and nearly E-W. The operation of this method that the redirection of cores and the direction analysis of paleocurrent is simple, quick and less expensive, Study of Yanchang Formation verifies the feasibility and reliability of the method application.
引文
[1]岳乐平,王建其,邸世祥.油气田钻井岩心及岩心裂缝方位确定的古地磁原理与方法[J].地球物理学进展,1997,12(3):71-76.
[2]Hailwood E H.古地磁岩心重定向与油气藏砂岩的磁性组构分析[J].石油物探译丛,1994,12(6):35-38.
[3]杨斌谊,吴汉宁,李学森.南泥湾油田钻井岩心古地磁学初步研究[J].石油与天然气地质,2002,23(4):397-401.
[4]梁利平,王海军,程鑫,等.钻井岩心古水流方向确定方法和原理[J].地球物理学进展,2012,27(1):370-375.
[5]张家振,陈勉,鲍洪志,等.非定向岩心黏滞剩磁重定向的方法[J].油气地球物理,2008,6(2):14-18.
[6]李学森,熊国锦.钻井岩心重定向的古地磁方法及其可靠性[J].石油勘探与开发,2006,33(5):581-585.
[7]侯守信,田国荣.黏滞剩磁(VRM)岩心定向的应用[J].岩石力学与工程学报,2000,19(增刊1):1128-1131.
[8]Graham J W.Magnetic susceptibility anisotropy,an unexploited petrofabric element[J].Bulletin of the Geological Society of America,1954,65(12):1257-1258.
[9]王海军,梁利平,程鑫,等.岩心定向与储层裂缝探测技术研究进展[J].断块油气田,2011,18(3):330-332.
[10]余钦范,郑敏.岩石磁组构分析及其在地学中的应用[M].北京:地质出版社,1992:87-93.
[11]吴汉宁.岩石的磁性组构及其在岩石变形中的应用[J].岩石学报,1988,4(1):94-97.
[12]张拴宏,周显强.磁化率各向异性地学应用综述[J].地质论评,1999,45(6):613-620.
[13]许同春,刘秀铭,阎虹.用旋转式磁化率仪和卡帕桥对岩样磁组构的比测[J].地震学报,1989,11(3):303-308.
[14]Hrouda F.Magnetic anisotropy of rocks and its applicationin geology and geophysics[J].Geophysical Survey,1982,5(1):37-82.
[15]Aidona E,Kondopoulou D,Georgakopoulos A.Palaeomagnetic and rock magnetic properties of sediment cores from Chalkidiki,Greece[J].Physics and Chemistry of The Earth Part A-solid Earth and Geodesy,2001,26(11/12):879-884.
[16]Janák F,Kropáek R V.A brief outline of the magnetic susceptibility anisotropy of various rock types[J].Studia Geophysica et Geodaetica,1973,17(2):123-130.
[17]Papanna G,Venkateshwarlu M,Periasamy V,et al.Anisotropy of magnetic susceptibility(AMS)studies of Campanian-Maastrichtian sediments of Ariyalur Group,Cauvery Basin,Tamil Nadu,India:An appraisal to Paleocurrent directions[J].Journal of Earth System Science,2014,123(2):351-364.
[18]Tarling D.H.Magnetism principles and applications in geology,geophysics and archaeology[M].London-New York:Chapman and Hall,1983:35-50.
[19]邓秀芹,刘新社,惠潇,等.岩心磁组构分析古水流方向的原理与应用[J].西北大学学报:自然科学版,2007,37(6):896-900.
[20]陈柏林,李中坚,谢艳霞.北京怀柔崎峰茶-琉璃庙地区岩石磁组构特征及其构造意义[J].地球学报,1997,18(2):134-141.
[21]朱岗崑.古地磁学:基础、原理、方法、成果与应用[M].北京:科学出版社,2005:166-174.
[22]朱日祥,黄宝春,潘永信,等.岩石磁学与古地磁实验室简介[J].地球物理学进展,2003,18(2):177-181.
[23]Kirschvink J L.The least-squares line and plane and the analysis of palaeomagnetic data[J].Geophysical Journal of the Royal Astronomical Society,1980,62(3):699-718.
[24]Fisher R A.Dispersion on a sphere[J].Proceedings of The Royal Society A:Mathematical Physical and Engineering Sciences,1953,217(1130):295-305.
[25]刘秀婷,韦乐乐,周亚楠,等.磁组构分析岩心古水流方向原理与应用[J].西部探矿工程,2014,26(8):86-91.
[26]张文昭.中国陆相大油田[M].北京:石油工业出版社,1997:810-852.
[27]姜亭,魏仙样,杭健,等.延长油田郑庄区长6油层组小层对比划分在注水开发中的应用[J].西北地质,2007,40(3):85-91.
[2]Hailwood E H.古地磁岩心重定向与油气藏砂岩的磁性组构分析[J].石油物探译丛,1994,12(6):35-38.
[3]杨斌谊,吴汉宁,李学森.南泥湾油田钻井岩心古地磁学初步研究[J].石油与天然气地质,2002,23(4):397-401.
[4]梁利平,王海军,程鑫,等.钻井岩心古水流方向确定方法和原理[J].地球物理学进展,2012,27(1):370-375.
[5]张家振,陈勉,鲍洪志,等.非定向岩心黏滞剩磁重定向的方法[J].油气地球物理,2008,6(2):14-18.
[6]李学森,熊国锦.钻井岩心重定向的古地磁方法及其可靠性[J].石油勘探与开发,2006,33(5):581-585.
[7]侯守信,田国荣.黏滞剩磁(VRM)岩心定向的应用[J].岩石力学与工程学报,2000,19(增刊1):1128-1131.
[8]Graham J W.Magnetic susceptibility anisotropy,an unexploited petrofabric element[J].Bulletin of the Geological Society of America,1954,65(12):1257-1258.
[9]王海军,梁利平,程鑫,等.岩心定向与储层裂缝探测技术研究进展[J].断块油气田,2011,18(3):330-332.
[10]余钦范,郑敏.岩石磁组构分析及其在地学中的应用[M].北京:地质出版社,1992:87-93.
[11]吴汉宁.岩石的磁性组构及其在岩石变形中的应用[J].岩石学报,1988,4(1):94-97.
[12]张拴宏,周显强.磁化率各向异性地学应用综述[J].地质论评,1999,45(6):613-620.
[13]许同春,刘秀铭,阎虹.用旋转式磁化率仪和卡帕桥对岩样磁组构的比测[J].地震学报,1989,11(3):303-308.
[14]Hrouda F.Magnetic anisotropy of rocks and its applicationin geology and geophysics[J].Geophysical Survey,1982,5(1):37-82.
[15]Aidona E,Kondopoulou D,Georgakopoulos A.Palaeomagnetic and rock magnetic properties of sediment cores from Chalkidiki,Greece[J].Physics and Chemistry of The Earth Part A-solid Earth and Geodesy,2001,26(11/12):879-884.
[16]Janák F,Kropáek R V.A brief outline of the magnetic susceptibility anisotropy of various rock types[J].Studia Geophysica et Geodaetica,1973,17(2):123-130.
[17]Papanna G,Venkateshwarlu M,Periasamy V,et al.Anisotropy of magnetic susceptibility(AMS)studies of Campanian-Maastrichtian sediments of Ariyalur Group,Cauvery Basin,Tamil Nadu,India:An appraisal to Paleocurrent directions[J].Journal of Earth System Science,2014,123(2):351-364.
[18]Tarling D.H.Magnetism principles and applications in geology,geophysics and archaeology[M].London-New York:Chapman and Hall,1983:35-50.
[19]邓秀芹,刘新社,惠潇,等.岩心磁组构分析古水流方向的原理与应用[J].西北大学学报:自然科学版,2007,37(6):896-900.
[20]陈柏林,李中坚,谢艳霞.北京怀柔崎峰茶-琉璃庙地区岩石磁组构特征及其构造意义[J].地球学报,1997,18(2):134-141.
[21]朱岗崑.古地磁学:基础、原理、方法、成果与应用[M].北京:科学出版社,2005:166-174.
[22]朱日祥,黄宝春,潘永信,等.岩石磁学与古地磁实验室简介[J].地球物理学进展,2003,18(2):177-181.
[23]Kirschvink J L.The least-squares line and plane and the analysis of palaeomagnetic data[J].Geophysical Journal of the Royal Astronomical Society,1980,62(3):699-718.
[24]Fisher R A.Dispersion on a sphere[J].Proceedings of The Royal Society A:Mathematical Physical and Engineering Sciences,1953,217(1130):295-305.
[25]刘秀婷,韦乐乐,周亚楠,等.磁组构分析岩心古水流方向原理与应用[J].西部探矿工程,2014,26(8):86-91.
[26]张文昭.中国陆相大油田[M].北京:石油工业出版社,1997:810-852.
[27]姜亭,魏仙样,杭健,等.延长油田郑庄区长6油层组小层对比划分在注水开发中的应用[J].西北地质,2007,40(3):85-91.