从学科高度看核测井

彭琥．从学科高度看核测井．测井技术，１９９４，１８（５）：３１８～３２５本文试图在核测井领域内．从其发展历史、方法和仪器分类，以及信息流三方面入手，以认识和思想方法为重点，响应和补充对我国测井学科发展的讨论。本文认为核测井研究可分为地质—物理基础原理、测量方法和仪器、应用方法和资料处理解释三大部分，它们以解决实际问题为共同出发点和归宿。我国核测井仪器研制与国际水平的差距在６０年代曾缩短到５年，但近年来却拉大到了十多年。投产仪器的内在质量和刻度标准化体系的差距更大。按辐射源、被测射线和信息采集分析方法来命名和分类．提供了一个把所有的核测井方法和仪器进行横向比较的方法，从中可体会到发展核测井仪应该综合运用空间、时间、能量等分析手段，以介质固有的核物理参数或岩石物理参数为仪器输出值，通过刻度（试验）井和数值模拟，建立仪器输出值—地层核物理参数—岩石物理参数之间的准确的定量转换及影响因素校正关系。核测井信息流程图提供了对核测井进行纵向分析的线索。研究和认识核测井应该全面完成其正演问题和反演问题的研究，而反演问题存在着更多的困难。在核测井信息流转的每一步骤上都有过成功，也都还存在问题。这对核测井工作者既是挑战，又是机

A General Survey of Nuclear Well Logging from the View-point of Well Logging Science.

Centring on the method of understanding and thinking, this paper tries to analyze nuclear well logging (NWL) through its history, classification and information flow, as a response and an addition to the discussion on how to develop well logging science in China. The research field of NWL can be divided into three ports: geologic and physical elementals, measuring method and instrument, as well as application and data processing. To solve practical problems is the starting point and end-result of the three parts mentioned above. The classification based on radiation source, detected radiation and data acquisition and analysing method, provides a way for horizontal comparison of all NWL methods and tools, from which the following conclusion on how to develop NWL tools can be drawn: (1) integration of such analyzing means as space, time and energy; (2) using medium intrinsic parameters in nuclear physics or petrophysics as the outputs of tools; (3) establishing accurately quantitative transformation relations among the tool output, nuclear physics and petrophysics parameters and correcting relations for influence factors by means of test pits and numerical simulation. The information flow chart provides a clue for vertical analysis of NWL. Both forward modelling and inversion should be used in NWL research work. Inversion is much more difficult. There have been successes and problems to be solved in every step of NWL informatign transfer. It is not only a challenge, but a chance as well for those who work in the field of NWL. Illustration is given in the paper to explain the above mentioned arguments.