摘要
裂缝信息对于低渗透储层的勘探开发具有重要意义。本文在深入探讨利用古地磁方法进行岩心裂缝重定向原理的基础上,详细介绍了岩心裂缝重定向的工作方法。针对垂直及平行于岩心中心轴的两种样品加工方式,推导出可直接利用退磁结果表达的裂缝方向的公式,并将这一结果应用于鄂尔多斯盆地一口有裂缝井的岩心,取得较好的应用效果。研究结果表明,利用古地磁方法进行岩心裂缝重定向具有操作简便、成本较低、且精度相对较高的特点。本文研究结果对于鄂尔多斯盆地的裂缝系统研究具有参考意义。
The crack information is of great significance for the exploration and development of lowpermeable reservoirs.After principle of reorientation core-cracks with paleomagnetic method was discussed,the operational approach of that was introduced specially.According to vertical and parallel drilling ways of samples,formulas for crack-redirection were elicited with the results of demagnetization.And the method was applied to the cores of a fractured well in Ordos Basin and achieved good results.The research shows that using paleomagnetic method to redirect cores-cracks has the characteristics of easy operation,low cost and high precision.At the same time,the research is reference for the study of Ordos Basin cracks.
引文
邓海成,刘洪涛,许洪东.2005.大庆台肇地区低渗透砂岩储层裂缝动态研究.石油天然气学报(江汉石油学院学报)27(增刊1):233--236.Deng Haicheng,Liu Hongtao and Xu Hongdong.2005.Dynamic study on low permeability sandstone reservoir fractures in Taizhao area of Daqing oilfield.Journal of Oil and Gas Technology,27(suppl.1):233-236.
何义中.2002.裂缝油气储层检测与预测的地球物理方法研究(博士学位论文).成都:成都理工大学.1-120.He Yizhong.2002.The Detection and Prediction of Nature Fraetured Oil and Gas Reservoirs Using Geophysical Method(PhD Thesis).Chengdu:Chengdu University of Technology.1-120.
李学森,熊国锦.2006.钻井岩心重定向的古地磁方法及其可靠性.石油勘探与开发,33(5):581-585.Li Xuesen and Xiong Guojin.2006.Paleomagnetic method of reorienting cores and its reliability.Petroleum Exploration and Development,33(5):581-585.
林树龙.2011.储层构造裂缝识别与预测方法研究.内江科技,32(2):138-139.Lin Shulong.2011.Method research of identification and forecast of structural fracture in reservior.Neijiang Science&Tecnology,32(2):138-139.
王海军,梁利平,程鑫等.2011.岩心定向与储层裂缝探测技术研究进展.断块油气田,18(3):330-332.Wang Haijun,Liang Liping,Cheng Xin et al.2011.Research progress in core orientation and reservoir fracture detection technology.Falt-Block Oil&Gas Field,18(3):330-332.
吴朝容.2005.致密碎屑岩气藏裂缝性储层预测方法(博士学位论文),成都:成都理工大学.1-133.Wu Chaorong.2005.The Prediction of Fractured Gas Reservoirs of Tight Clastic Rock;(PhD Thesis).Chengdu?Chengdu University of Technology.1-133.
杨斌谊,吴汉宁,李学森等.2002.南泥湾油田钻井岩心古地磁学初步研究.石油与天然气地质,23(4):397-342.Yang Binyi,Wu Hanning,Li Xuesen et al.2002.Paleomagnetic research of drilling cores in Nanniwan oilfield.Oil&Gas Geology,23(4):397-342.
杨斌谊,龚建军,陈建军.2003.确定油田钻井岩心原始方位的古地磁学方法.西北地质,36(4):79-83.Yang Binyi,Gong Jianjun and Chen Jianjun.2003.Paleomagnetism research on orientation of drilling cores in oil field.Northwestern Geology,36(4):79-83.
朱岗崑.2005.古地磁学:基础、原理、方法、成果与应用.北京:科学出版社.1-268.Zhu Gangkun.2005.Paleomagnetism:Basic,Principles,Methods,Results and Applications.Beijing:Science Press.1-268.
谈晓冬,刘椿,方大钧等.1995.山西沁水盆地三叠纪岩石古地磁学研究.中国科学(B辑),25(7):755-763.Tan Xiaodong,Liu Chun,Fang Dajun et al.1996.A paleomagnetic study of Triassic sedimentary rocks from Qinshui Basin,Shanxi Province,north China.Science in.Chino(Series B),39(1):101-112.
岳乐平,王建其,邸世祥等.1997.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.地球物理学进展,12(3):71-76.Yue Leping.Wang Jianqi.Di Shixiang et al.1997.The paleomagnetic principle and method appliing to orientation of core and cracks in oil and gas field.Progress in Geophysics,12(3):71-76.
温博华.2007.古地磁在大庆徐家围子火山岩裂缝定向中的应用(硕士学位论文).浙江:浙江大学,1-83.Wen Bohua.2007.The Application of Paleomagnetic Method on Fracture Orientation of Volcanic Rocks,Xujiaweizi in Daqing(Master Thesis).Zhejiang:Zhejiang University.1-83.
王兴建.2003.地震裂缝预测方法研究及应用(硕士学位论文).成都:成都理工大学.1-85.Wang Xingjian-2003.Study on the Rock Fractures Prediction Methods from Seismic Data(Master Thesis).Chengdu:Chengdu University of Technology.1-85.
张光辉.2011.油气储层测井裂缝识别方法研究及软件研制(硕士学位论文).成都:成都理工大学.1--88.Zhang Guanghui.2011.Method Research and Software Development of Identification of Fracture in Oil or Gas Reservoir Based on Well Logging(Master Thesis).Chengdu:Chengdu University of Technology.1-88.
吴汉宁,岳乐平.1996.古地磁学在油气勘探中的应用.见:徐文耀编.地磁大气空间研究及应用.北京:地震出版社.91-95.Wu Hanning and Yue Leping.1996.Paleomagnetism research on basin geology and petroleum exploration.In:Xu Wenyao(Ed.).Research and Application of Magnetism,Atmosphere and Space.Beijing;Earthquake Publishing House.91-95.
蒲静,秦启荣.2008.油气储层裂缝预测方法综述.特种油气藏,15(3):9-13.Pu Jing and Qin Qirong.2008.An overview of fracture prediction methods for oil and gas reservoirs.Special Oil and Gas Reservoirs,15(3):9-13.
董亨茂.2004.储层裂缝描述与预测研究进展.新疆石油学院学报,16(2):9-14.Dong Hengmao.2004.Description and prediction of reservoir fractures networks.Journal of Xinjiang Petroleum Institute,16(2):9-14.
Fisher R.1953.Dispersion on a Sphere.Proceedings of the Royal Society ofLondon(Series A),217(1130):295-305.
Irving E.1964.Paleomagnetism and Its Application to Geological and Geophysical Problems.New York;Wiley.1-399.
Kirschvink J K.1980.The least-squares line and plane and the analysis of palaeomagnetic data.Geophysical Journal of the Royal Astronomical Society,62(3):699-718.
McFadden P L and McElhinny M W.1988.The combined analysis of remagnetization circles and direct observations in palaeomagnetism.Earth and Planetary Science Letters,87(1-2):161-172.
Zhu R X and Tschu K-K.2001.Studies on Paleomagnetism and Reversals of Geomagnetic Field in China.Beijing:Science Press.1-168.