摘要
2008年汶川大地震发生后,我国迅速实施了汶川地震断裂带科学钻探项目(WFSD).钻井取心是研究地下情况的直接资料,但取心时通常采用非定向取心技术,缺少准确的深度和方位信息,需要利用测井资料对其进行深度和方向的还原,即岩心空间归位.针对汶川地震断裂带科学钻探项目一号孔(WFSD-1孔),利用成像-岩心扫描图像综合处理软件(CCSDLogCore)精确和直观的完成了2055块岩心图像的空间归位.对归位成果进行了分析,发现随着钻孔深度的增加,岩心深度误差增大,说明了归位结果符合实际情况,为下一步地质构造分析奠定了基础,文章还总结了归位过程中遇到的问题并提出了建议.
After the Wenchuan earthquake in 2008, the government of our country rapidly implemented the Wenehuan Earthquake Fault Zone Scientific Drilling Project （WFSD）. Form drilling cores can obtain the direct data of the underground. This is very important for scientific drilling researches. But the original depths and orientations of cores cannot be positive, so core spatial position restoring is needed. By being processed by imaging log-core scanning picture processing integrated software （CCSDLogCore）, the spatial positions of 2055 pieces of core scanning images collected from No. 1 borehole of Wenchuan Earthquake Fault Zone Scientific Drilling （WFSD-1） are restored precisely and visually. By analyzing the results of the restoring work, it is found that the depth error of the cores increased with the depth of the hole, and that confirmed the results accord the reality. These results lay a good foundation for the following geological structure analysis; the problems during the work are summed up and suggestions are presented as follows, it＇s better to do the acoustic imaging logging and the resistivity imaging logging at the same hole so that we can obtain better information about the wall of the borehole~ we should also avoid the problems caused by human during the preliminary work of position restoring before we can start the accurate and efficient work of core position restoring.
出处
《地球物理学进展》
CSCD
北大核心
2012年第1期75-82,共8页
Progress in Geophysics
基金
教育部科学技术研究重点项目(109035)
中央高校基本科研业务费专项资金(2011YXL009)联合资助
关键词
汶川地震断裂带科学钻探(WFSD)
成像测井
岩心归位
人机联作
Wenchuan Earthquake Fault Zone Scientific Drilling （WFSD）, imaging logging, core spatial position restoring, man-computer interaction
