High-Resolution Study of Subsurface Geology using Core-Log Data Integration

使用岩心测井数据集成对地下地质进行高分辨率研究

• 批准号: 12640439
• 负责人: TAIRA Asahiko
• 金额: $ 2.37万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12640439/
• 关键词: Downhole Logging; Physical Property; Paleoenvironment; Sedimentology; Structural Geology; Nankai Trough; Ocean Drilling Program; 孔壁画像; デコルマ; 氷期・間氷期; Core-Log Integration; GeoFrame

In 2001, a software package for downhole logging data analysis called Geoframe was introduced to Ocean Research Institute, University of Tokyo. Using this software the logging data obtained through Ocean Drilling Program Leg 186 and 196 were processed. The resistivity formation scanner data from the forearc basin off Sanriku showed clear image of mudstone and dolomite intercalation. Leg 196 data at the decollement horizon of the Nankai subduction zone indicate complex network of porosity structure of the fault zone.Logging data obtained from 200m drilling at Choshi, Chiba Prefecture showed cyclic singles of porosity, natural gamma-ray and resistivity. Such cyclic variability of logging data was correlated with oxygen isotope variability for last 400K yr. ago to 800 yr. ago. Examination of both lithological data and logging data, it was possible to show that the Kuroshio-Oyashio fluctuation according to glacial and interglacial cycles was a cause for the physical property cyccles.This study demonstrated that combined analysis of samples and logging data produces a powerful tool for sedimentology and structural geology.

2001年，东京大学海洋研究所推出了一款名为geframe的井下测井数据分析软件包。利用该软件对海洋钻井项目186和196段测井资料进行了处理。三陆外弧前盆地的电阻率地层扫描数据显示出清晰的泥岩和白云岩夹层图像。南开俯冲带滑脱层196段资料表明，该断裂带具有复杂的孔隙结构网络。千叶县Choshi 200米钻井的测井数据显示了孔隙度、天然伽马射线和电阻率的循环单。这种测井资料的旋回变化与最近400K ~ 800年的氧同位素变化相关。通过对岩性资料和测井资料的综合分析，可以证明，根据冰期和间冰期旋回的黑潮-漂潮波动是物性旋回的一个原因。该研究表明，将样品分析与测井资料相结合，可以为沉积学和构造地质学提供有力的工具。

项目成果

Taira A: "Tectonic Evolution of the Japanese island arc system"Annual Review of Earth and Planetary Sciences. 105 (5). 109-134 (2000)

平A：“日本岛弧系统的构造演化”地球与行星科学年度评论。

芦 寿一郎: "メタンハイドレートと冷湧水からみた沈み込み帯の物質循環-南海トラフ付加プリズムの例-"地球号外. 122-129 (2001)

Juichiro Ashi：“从甲烷水合物和冷泉水中看到的俯冲带物质循环 - 南海海槽吸积棱镜的一个例子 -” Earth Extra 122-129 (2001)。

Asahiko Taira: "Material cycle in subduction zone-role of accretionay prism"Earth Montyly (Chikyu) special issue. (32). 6-12 (2001)

Asahiko Taira：“俯冲带的物质循环-吸积棱镜的作用”Earth Montyly (Chikyu) 特刊。

朴 進午: "EW9907/08航海乗船研究者,南海トラフ反射法地震探査データのAVO解析"地質雑誌. 110(4). 510-520 (2001)

Jin-go Park：“EW9907/08航次的研究员，南海海槽反射法地震勘探数据的AVO分析”地质杂志110（4）510-520（2001）。

ho G: "Compensation of the Ontong Java Platenau by surface and subsurface ioading"Journal of geophysical Research. 105 (5). 11171-11183 (2000)

ho G：“地表和地下装载对翁通爪哇高原的补偿”地球物理研究杂志。