Preliminary Results of Subsurface Physical Properties using Resistivity Logger Prototype

2nd Southeast Asian Conference on Geophysics

Widodo^1 ; Fatkhan^1 ; Christy Viony, Natashia^1 ; Setiawan, Tedy^1

Department of Geophysical Engineering, Faculty of Mining and Petroleum Engineering, Bandung Institute of Technology, Jl. Ganesha10, West Java, Bandung

40132, Indonesia^1

关键词: Geological modeling;    Geophysical techniques;    Physical properties of materials;    Resistivity logs;    Resistivity values;    Resistivity well-logging;    Scale utilization;    Subsurface layer;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/318/1/012044/pdf
DOI  :  10.1088/1755-1315/318/1/012044

来源: IOP

【 摘 要 】

All geophysical techniques are depends on the existance of a contrasts in physical properties of materials. Since the complexity of the subsurface physical properties can vary, the knowledge of basic theories about it should be validated with practical skills. One effective way to improve the practical skills is by designing a small-scale instrument of well logging to identify the resistivity of the subsurface layers. In this research, a simple tunnel model is implemented in order to represent a complex geological model. Based on well-logging principles, this prototype is made to identify variations in resistivity value using a logger equipped with Wenner Array of four electrodes. An Arduino UNO microcontroller is utilized to arrange the work of the logger and programmed to process the potential values. It is obtained from the electrodes and displayed by the interface. In order to test the propotype, the air-filled tunnel models are performed. At the location near the air-filled tunnel, the resistivity log data give highest values compare any other location due to the air material. The results show that the resistivity well logging data are able to represent the air-filled tunnel model. The 3D model of well log data can identify the type of the physical properties of material in the air-filled tunnel model. Furthermore, the simple concept of this prototype can be developed for large-scale utilization.