Core-log-seismic integration in hard rock environments using the ICDP drilling project COSC-1, Sweden

使用瑞典 ICDP 钻井项目 COSC-1 在硬岩环境中进行岩心-测井-地震一体化

基本信息

批准号：
339380967
负责人：
Professor Dr. Christian Berndt
金额：
--
依托单位：
Sektion 4.2: Geomechanik und Wissenschaftliches Bohren
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/339380967?language=en
关键词：
Core log seismic integration hard

项目摘要

This study will investigate in detail the geological structure and the petrophysical properties of the Scandinavian Caledonides within the framework of the ICDP project Collisional Orogeny in the Scandinavian Caledonides (COSC). The goal is to gain new insights into critical orogenic processes, such as nappe emplacement, and to establish a justified base for the comparison of the Caledonides with modern analogues, e.g. the Himalayas. The key objective of this proposal is to construct a high-resolution seismic stratigraphy of the Seve Nappe Complex at the COSC site and nearby areas by core-log-seismic integration (CLSI). This will allow identification of distinctive petrophysical characteristics of the metamorphic sequence of the Seve Nappe Complex and lead to an improved understanding of its evolution. Furthermore, this information will be extrapolated to a large scale model, using already existing high-resolution and VSP calibrated 2D and 3D seismic imaging. Accurate characterization of the subsurface requires not only reflection seismic analysis but also integration of high-resolution petrophysical drill core and geophysical well-log data sets. To reach this goal, a useful merging and cross calibration of core, downhole logging and seismic data is mandatory to shed new light on the configuration and evolution of the primary shear zones (supposedly transformed into mylonites) between nappes. Our proposal focuses on investigations of the geo- and petrophysical properties of the rock using an interdisciplinary approach based on CLSI. We will integrate core measurements, logging data and seismic data, which are of different resolution in the respective measurement scales. The CLSI method has been successfully applied in marine and lake environments and in many IODP drilling projects. In this proposal, the techniques will be applied to hard rock for the first time, which will require the development of new approaches of CLSI to crystalline basement. The COSC project has been chosen because excellent seismic data, downhole logging and VSP data are available and several petrophysical measurements are currently being performed by different labs on a large set of core samples; all scientists working on these data have agreed to be involved or support this work.

这项研究将详细研究在Scandinavian Caledonides（COSC）中ICDP项目碰撞的框架内，斯堪的纳维亚喀里多尼尼德郡的地质结构和岩石物理特性。目的是获得对关键造口过程的新见解，例如纳普的安置，并为将喀里多尼德与现代类似物（例如喜马拉雅山。该提案的主要目的是通过COSC地点和附近地区的Seve Nappe复合物（CLSI）构建高分辨率的地震地层。这将允许鉴定Seve Nappe复合物的变质序列的独特岩石物理特性，并提高人们对其进化的理解。此外，该信息将使用已经存在的高分辨率和VSP校准的2D和3D地震成像来推断到大型模型。地下的准确表征不仅需要反射地震分析，而且还需要集成高分辨率的岩石物理钻芯和地球物理井数据集。为了实现这一目标，必须对核心，井下记录和地震数据进行有用的合并和交叉校准，以确保对尿布之间的主要剪切区（据称已转化为甲隆人）的构型和演变的新启示。我们的建议着重于使用基于CLSI的跨学科方法对岩石的地球和岩石物理特性进行研究。我们将整合核心测量值，记录数据和地震数据，这些数据在相应的测量量表中具有不同的分辨率。 CLSI方法已成功应用于海洋和湖泊环境以及许多IODP钻井项目。在此提案中，该技术将首次应用于硬石，这将需要开发CLSI的新方法来结晶地下室。之所以选择COSC项目，是因为提供了出色的地震数据，井下记录和VSP数据，并且目前由不同的实验室在大量的核心样本上进行了几项岩石物理测量。所有从事这些数据的科学家都同意参与或支持这项工作。

项目成果

期刊论文数量（2）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Core‐Log‐Seismic Integration in Metamorphic Rocks and Its Implication for the Regional Geology: A Case Study for the ICDP Drilling Project COSC‐1, Sweden

DOI：
10.1029/2020gc009376
发表时间：
2021-01
期刊：
Geochemistry
影响因子：
3.7
作者：
J. Elger;C. Berndt;Felix Kästner;S. Pierdominici;J. Kück;B. Almqvist;C. Juhlin;H. Lorenz
通讯作者：
J. Elger;C. Berndt;Felix Kästner;S. Pierdominici;J. Kück;B. Almqvist;C. Juhlin;H. Lorenz

Cross‐Scale Seismic Anisotropy Analysis in Metamorphic Rocks From the COSC‐1 Borehole in the Scandinavian Caledonides

斯堪的纳维亚喀里多尼亚山脉 COSCâ1 钻孔变质岩的跨尺度地震各向异性分析