Downhole Measurements in the AND-2A Borehole, ANDRILL Southern McMurdo Sound Project, Antarctica
Downhole Measurements in the AND-2A Borehole, ANDRILL Southern McMurdo Sound Project, Antarctica
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南极洲 ANDRILL 南麦克默多海峡项目 AND-2A 钻孔的井下测量
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发表时间：
2009
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影响因子：
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通讯作者：
T. Wilson
中科院分区：
文献类型：
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作者：
T. Wonik;T. Grelle;D. Handwerger;R. Jarrard;A. McKee;T. Patterson;T. Paulsen;S. Pierdominici;D. Schmitt;H. Schröder;M. Speece;T. Wilson
在ANDRILL south McMurdo Sound （SMS）项目的框架下，在1138.54米深的AND-2A井眼中进行了成功的井下实验。成功记录的电缆测井包括：磁化率、伽马能谱、声速、井眼观测、中子孔隙度、密度、测径器、地球化学、温度和倾角仪。某电阻率工具及其备份工具均失效，导致电阻率数据无法采集。由于井眼条件的原因，除了一些由于桥接或被钻柱屏蔽而无法进入的井段外，测井数据是从海底以下1138米至230米的总深度中分几次收集的。此外，从~1000 mbsf到海底建立了垂直地震剖面（VSP）。在南极洲进行了首次水力压裂应力测量，测量范围为1000-1138 mbsf。这个广泛的数据集将使短信科学团队能够实现短信项目的一些雄心勃勃的目标。预计在以下主题上可以做出有价值的贡献：旋回与气候变化、热通量与流体流动、维多利亚陆盆地地震地层学以及现代地壳应力场的结构与状态。
Under the framework of the ANDRILL Southern McMurdo Sound (SMS) Project successful downhole experiments were conducted in the 1138.54 metre (m)-deep AND-2A borehole. Wireline logs successfully recorded were: magnetic susceptibility, spectral gamma ray, sonic velocity, borehole televiewer, neutron porosity, density, calliper, geochemistry, temperature and dipmeter. A resistivity tool and its backup both failed to operate, thus resistivity data were not collected. Due to hole conditions, logs were collected in several passes from the total depth at ~1138 metres below sea floor (mbsf) to ~230 mbsf, except for some intervals that were either inaccessible due to bridging or were shielded by the drill string. Furthermore, a Vertical Seismic Profile (VSP) was created from ~1000 mbsf up to the sea floor. The first hydraulic fracturing stress measurements in Antarctica were conducted in the interval 1000-1138 mbsf. This extensive data set will allow the SMS Science Team to reach some of the ambitious objectives of the SMS Project. Valuable contributions can be expected for the following topics: cyclicity and climate change, heat flux and fluid flow, seismic stratigraphy in the Victoria Land Basin, and structure and state of the modern crustal stress field.