鄂尔多斯盆地东南部延长组岩心裂缝重定向
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摘要
裂缝对鄂尔多斯盆地低渗透储层至关重要。为研究该盆地岩心裂缝展布,在古地磁岩心定向以及笔者曾提出的古地磁岩心裂缝重定向的基础上,以鄂尔多斯盆地东南部某油田延长组的岩心为研究对象,对采集的样品采用2种不同的加工方式,建立样品坐标系和反向样品坐标系,采用古地磁方法分别对其进行重定向。最终推导出各自测试结果所表达的裂缝方向的公式,得到鄂尔多斯盆地东南部某油田6口井延长组岩心裂缝的方位,并对比验证了其计算结果,均比较可靠。研究表明对于类似鄂尔多斯盆地的裂缝系统,运用古地磁方法对2个相对坐标系加工的标样进行裂缝重定向是可靠的,且精度较高,可为同类盆地裂缝研究提供参考。
It is very important to study the fractures in Ordos Basin which is the typical low-permeability reservoir.This paper studies the fracture distribution of the basin,cores of Yanchang Group in the southeast of Ordos Basin on the basis of paleomagnetic direction to cores and paleomagnetic redirection to core fracture.The samples were redirected by two different processing methods through which sample coordinate system and reverse sample coordinate system were built.Finally,equations of fracture direction expressed by test results were deduced and direction of core fracture from Yanchang Group in the oil field of southeastern Ordos Basin was obtained.The contrast and verification results show that it is reliable and accurate to use paleomagnetism to redirect core fracture based on two opposite coordinates,which could provide reference to fracture system of the similar basins.
It is very important to study the fractures in Ordos Basin which is the typical low-permeability reservoir.This paper studies the fracture distribution of the basin,cores of Yanchang Group in the southeast of Ordos Basin on the basis of paleomagnetic direction to cores and paleomagnetic redirection to core fracture.The samples were redirected by two different processing methods through which sample coordinate system and reverse sample coordinate system were built.Finally,equations of fracture direction expressed by test results were deduced and direction of core fracture from Yanchang Group in the oil field of southeastern Ordos Basin was obtained.The contrast and verification results show that it is reliable and accurate to use paleomagnetism to redirect core fracture based on two opposite coordinates,which could provide reference to fracture system of the similar basins.
引文
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[15]贺晓.鄂尔多斯盆地姬塬—元城地区上三叠统裂缝发育特征及形成机理研[D].西安:西北大学,2009.
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[17]周亚楠.延长油田西南部裂缝空间展布及古水流方向研究[D].西安:西北大学,2013.
[18]卢颖忠,黄智辉,管志宁,等.储层裂缝特征测井解释方法综述[J].地质科技情报,1998,17(1):85-90.
[19]Collinson D W.Methods in eock magnetic and palaomagnetism[M].London,New York:Chapman and Hall,1983.
[20]McElhinny M W.Palaomagnetism and plate tectonics[M].[S.l.]:Camberidge University Press,1973.
[21]Kirschvink J K.The least-squares line and plane and anaysis of paleomagnetic data[J].Geophys.J.R.Astron.Soc.,1980,62(3):699-718.
[22]Tan Xiaodong,Liu Chun,Fang Dajun,et al.A paleomagnetic study of Triassic sedimentary rocks from Qinshui Basin,Shanxi Province,North China[J].Science in China:Series D,1996,39(1):101-112.
[23]Fisher R A.Dispersion on a sphere[J].Proc.R.Soc.Lond.A,1953,217:295-305.
[24]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.
[25]Zhu R X,Tschu K K.Studies on paleomagnetism and resersals of geomagnetic field in China[M].Beijing:Science Press,2001.
[26]Butler R F.Paleomagnetism:Magnetic domains to geologic terranes[M].New York:Blackwell Scientific Publications,1998.
[27]马珊,林伟,王清晨,等.鄂尔多斯盆地南部延长组中段剪裂缝方向分析[J].科学通报,2016,61(27):3049-3063.
[2]闫生权,范斌,杨振迎,等.储层裂缝预测方法[J].中国石油和化工标准与量,2013(13):141.
[3]林树龙.储层构造裂缝识别与预测方法研究[J].内江科技,2011(2):138-139.
[4]唐诚.储层裂缝表征及预测研究进展[J].科技导报,2013,31(21):74-79.
[5]Bergosh J L,Lord G D.New developments in the analysis of cores fromnaturally fractured reservoirs[C]∥SPE Annual Technical Conference and Exhibition.Dallas,Texas,US:[s.n.],1987:27-30.
[6]Hailwood E A.Paleomagnetism of the Msissi norite(Morocco)and the paleozoic reconstruction Gondwanaland[J].Earth and Planetary Science Letters,1974,23(3):376-386.
[7]吴汉宁,岳乐平.古地磁学在油气勘探中的应用[C]∥徐文耀.地磁大气空间研究及应用.北京:地震出版社,1996:91-95.
[8]岳乐平,王建其,邸世祥,等.油气田钻井岩芯及岩芯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.
[9]杨斌谊,龚建军,陈建军.岩芯定向[J].西北地质,2003,36(4):79-83.
[10]杨斌谊,吴汉宁,李学森,等.南泥湾油田钻井岩芯古地磁学初步研究[J].石油与天然气地质,2002,23(4):397-342.
[11]温博华.古地磁在大庆徐家围子火山岩裂缝定向中的应用[D].杭州:浙江大学,2007.
[12]韦乐乐,程鑫,刘秀婷,等.岩心裂缝重定向的古地磁方法研究[J].地质科学,2013,48(4):1286-1294.
[13]宋永东,戴俊生.储层构造裂缝预测研究[J].油气地质与采收率,2007,14(6):9-13.
[14]王瑞飞,孙卫.鄂尔多斯盆地姬塬油田上三叠统长组超低渗透砂岩储层微裂缝研究[J].地质论评,2009,55(3):444-448.
[15]贺晓.鄂尔多斯盆地姬塬—元城地区上三叠统裂缝发育特征及形成机理研[D].西安:西北大学,2009.
[16]Nelson R A,Handin J W.Experimental study of fracture permeability in porous rocks[J].AAPG Bulletin,1977,61(2):227-236.
[17]周亚楠.延长油田西南部裂缝空间展布及古水流方向研究[D].西安:西北大学,2013.
[18]卢颖忠,黄智辉,管志宁,等.储层裂缝特征测井解释方法综述[J].地质科技情报,1998,17(1):85-90.
[19]Collinson D W.Methods in eock magnetic and palaomagnetism[M].London,New York:Chapman and Hall,1983.
[20]McElhinny M W.Palaomagnetism and plate tectonics[M].[S.l.]:Camberidge University Press,1973.
[21]Kirschvink J K.The least-squares line and plane and anaysis of paleomagnetic data[J].Geophys.J.R.Astron.Soc.,1980,62(3):699-718.
[22]Tan Xiaodong,Liu Chun,Fang Dajun,et al.A paleomagnetic study of Triassic sedimentary rocks from Qinshui Basin,Shanxi Province,North China[J].Science in China:Series D,1996,39(1):101-112.
[23]Fisher R A.Dispersion on a sphere[J].Proc.R.Soc.Lond.A,1953,217:295-305.
[24]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.
[25]Zhu R X,Tschu K K.Studies on paleomagnetism and resersals of geomagnetic field in China[M].Beijing:Science Press,2001.
[26]Butler R F.Paleomagnetism:Magnetic domains to geologic terranes[M].New York:Blackwell Scientific Publications,1998.
[27]马珊,林伟,王清晨,等.鄂尔多斯盆地南部延长组中段剪裂缝方向分析[J].科学通报,2016,61(27):3049-3063.