In-situ Measurements in the Nankai Accretionary Prism with the Geoprops Probe

国际大洋钻探计划的主要目标之一是研究在会聚的构造板块边缘形成的增生棱柱内的变形机制和流体迁移路径。该项目将建造一个原型仪器，用于南开吸积棱柱的一个ODP孔中，测量孔隙流体压力、地层温度、渗透率和局部应力方向；还将对流体进行采样。这些测量对于了解棱镜内半饱和沉积物变形的机制是很重要的。与其他同类仪器相比，该仪器的主要优点是它将在钻井砂线上回收，而不是测井电缆，这将大大加快测量过程。%%%

One of the prime objectives of the international Ocean Drilling Program (ODP) is to investigated the mechanics of deformation and paths of fluid migration within accretionary prisms that form at convergent tectonic plate margins. This project will construct a prototype instrument to be used in an ODP hole in the Nankai accretionary prism to measure pore fluid pressure, formation temperature, permeability, and partial stress orientation; fluids will also be sampled. These measurements are important in order to understand the mechanics of semiindurated sediment deformation within the prism. The main advantage of this instrument over other similar instruments is that it will be recovered on the drilling sand line rather than the logging cable; this will greatly speed the process of measurement. %%%