Advanced Density Logging Tool

提出了一项研究计划，以开发一种新的， 一种用于测量体积的新型钻孔测井工具 地质构造的密度。 此工具使用 直线感应加速器（LIA），以产生强烈的x- 从地层散射的射线束。 检测器 放置在加速器附近， 从而提供密度的直接测量。 LIA基 系统相对于其它密度的系统具有显著的优点， 测井工具 因为它的强度是 对于放射性工具，LIA有助于提高 灵敏度和/或记录速度，同时提供更高的安全性 在处理和运输过程中。 而且，它将更加坚固， 能够承受更高的工作温度（175 oC）， 比其他X射线型测井工具昂贵， 参数：（1）电子能量1 MeV;（2）束流50 （3）直径10 cm;（4）成本50，000美元。 我们建议 完成三项任务：（1）开发LIA系统设计，包括 加速器、其动力系统和X射线转换器;（2） 进行实验，以评估和选择关键的LIA组件 以及（3）开发X射线探测器的概念设计 系统 第一阶段的成功将为以下方面奠定坚实的基础： 在第二阶段开发实验室原型测井工具。

A research program is proposed to develop a new and innovative type of borehole logging tool for measuring the bulk density of geological formations. This tool uses a linear induction accelerator (LIA) to generate an intense x- ray beam which is scattered from the formation. Detectors placed near the accelerator sense the scattered photons thereby providing a direct measure of density. LIA-base systems offer substantial advantages over other density logging tools. Because its intensity is 50X more than that for radioactive tools, the LIA facilitates higher sensitivity and/or logging speed while offering greater safety during handling and transport. Also, it will be more rugged, capable of higher operating temperatures (175oC), and 3X less expensive than other x-ray-type logging tool with the following parameters: (1) electron energy 1MeV; (2) beam current 50 uA; (3) diameter 10 cm and (4) cost $50,000. We propose to perform three tasks: (1) develop a LIA system design including the accelerator, its power system and an x-ray converter; (2) perform experiments to evaluate and select key LIA components and (3) develop a onceptual design for the x-ray detector system. Success in Phase I will provide a firm foundation for development of a laboratory prototype logging tool in Phase II.