MEASURING SYSTEM TO INVESTIGATE GEO- AND GAS-DYNAMIC PROCESSES IN HYDRAULIC FRACTURING OF COAL SEAMS
A. N. Drobchik
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Угольный пласт, дегазация, газодинамический каротаж, гидроразрыв, лабораторный стенд, Coal seam, degassing, gas-dynamic logging, hydraulic fracturing, laboratory test bench
Abstract
A measuring system has been developed for a test bench allowing the study of gas-dynamic processes in large-sized rock samples when performing hydraulic fracturing of a coal seam in a borehole model. This system provides collection of the data on pressure in a hydraulic fracturing device and loading of pneumatic jacks which create compressive stresses in the borehole zone, it also records acoustic emission during crack formation. An additional capability is implemented to measure the flow rate of gas suppled to sample through the holes on its side wall and pumped from the borehole.
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