Document Type

Conference Paper

Publication Date


Publication Details

J. Pope and Q. Morgan, A new in-situ method for measuring simultaneously coal seam gas content and permeability, 13th Coal Operators' Conference, University of Wollongong, The Australasian Institute of Mining and Metallurgy & Mine Managers Association of Australia, 2013, 284-290.


This paper will describe a new method for measuring simultaneously coal seam gas content and permeability that can be performed on existing coal quality holes. The goal of the work was to provide an operational expedient and cost effective method for achieving these simultaneous measurements reliably and accurately. This reported method involves combining an established gas testing technique, based on downhole Raman spectroscopy, with an established permeability testing technique, based on open hole inflate straddle packer technology. This paper describes these two key enabling technology platforms and the means developed to facilitate simultaneous operations of both. A standard test program is also described, encompassing a review of test planning, test methods, and operational considerations required to successfully combine these measurement methods. In addition, the steps required to validate data integrity and ensure accuracy while optimising operational efficiencies are discussed. The conclusions of the work indicated that proper selection of equipment options and careful coordination of the test plans typically used for the two methods results in successful integration of the testing methods and simultaneous measurement of gas content and permeability in coal seams.