Picture of boy being examining by doctor at a tuberculosis sanatorium

Understanding our future through Open Access research about our past...

Strathprints makes available scholarly Open Access content by researchers in the Centre for the Social History of Health & Healthcare (CSHHH), based within the School of Humanities, and considered Scotland's leading centre for the history of health and medicine.

Research at CSHHH explores the modern world since 1800 in locations as diverse as the UK, Asia, Africa, North America, and Europe. Areas of specialism include contraception and sexuality; family health and medical services; occupational health and medicine; disability; the history of psychiatry; conflict and warfare; and, drugs, pharmaceuticals and intoxicants.

Explore the Open Access research of the Centre for the Social History of Health and Healthcare. Or explore all of Strathclyde's Open Access research...

Image: Heart of England NHS Foundation Trust. Wellcome Collection - CC-BY.

Experimental ultrasonic microseismograms using scaled realistic earth and borehole models

Parra, Jorge O. and Xu, Pei-Cheng and Post, Mark (2006) Experimental ultrasonic microseismograms using scaled realistic earth and borehole models. In: SEG Technical Program Expanded Abstracts 2006. Society of Exploration Geophysicists, Tulsa.

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

This experimental study is aimed at simulating and interpreting borehole sonic logs in a laboratory environment. Our interest is focused on pattern recognition of seismic signatures associated with formation inhomogeneity and irregular boreholes, typical as those encountered in a single borehole environment. A comprehensive set of high-resolution full waveform ultrasonic responses in scaled realistic earth and borehole models was acquired. The borehole models presented in this paper target the effect of these two factors on the microseismogram: i) a high velocity layer between lower velocity materials; and ii) a washout in a homogeneous medium. We first describe the specimens, experimental apparatus, and data acquisition and processing system of the experiment; and then present the different patterns of microseismograms that we have obtained. Finally we analyze the results and provide some guidance as how these images can be used in a practical application. The results suggest that understanding of the signal due to the interaction between the layered medium and the borehole can assist in the interpretation of microseismograms acquired in the field and the associated Q logs.