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 low- permeable 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.
出处
《地质科学》
CAS
CSCD
北大核心
2013年第4期1286-1294,共9页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家自然科学基金项目(编号:41074045,41174055)
中国地质调查局国土资源大调查综合研究基金项目(编号:1212010610102)
陕西省普通高等学校重点学科专项资金(编号:081802)资助
关键词
古地磁
岩心定向
裂缝重定向
Paleomagnetism,Orientation of drilling core, Redirection of cracks
