Imaging the Underground Coal Gasification Zone with Microgravity Surveys

Czasopismo : Acta Geophysica
Tytuł artykułu : Imaging the Underground Coal Gasification Zone with Microgravity Surveys

Autorzy :
Stanisławska, I.
Space Research Center Polish Academy of Sciences,
Popielawska, B.
Space Research Center Polish Academy of Sciences,
Vashisth, A. K.
Department of Mathematics, Kurukshetra University, Kurukshetra, India,,
Rani, K.
Department of Mathematics, Government Post Graduate College, Hisar, India,,
Singh, K.
Department of Mathematics, Guru Jambheshwar University of Science and Technology, Hisar, India,,
Kotyrba, A.
Central Mining Institute (GIG), Katowice, Poland,,
Kortas, Ł.
Central Mining Institute (GIG), Katowice, Poland,,
Stańczyk, K
Central Mining Institute (GIG), Katowice, Poland,,
Abstrakty : The paper describes results of microgravity measurements made on the surface over an underground geo reactor where experimental coal gasification was performed in a shallow seam of coal. The aim of the research was to determine whether, and to what extent, the microgravity method can be used to detect and image a coal gasification zone, especially caverns where the coal was burnt out. In theory, the effects of coal gasification process create caverns and cracks, e.g., zones of altered bulk density. Before the measurements, theoretical density models of completely and partially gasified coal were analysed. Results of the calculations of gravity field response showed that in both cases on the surface over the gasification zone there should be local gravimetric anomalies. Over the geo reactor, two series of gravimetric measurements prior to and after gasification were conducted. Comparison of the results of two measurement series revealed the presence of gravimetric anomalies that could be related to the cavern formation process. Data from these measurements were used to verify theoretical models. After the experiment, a small cavern was detected at the depth of the coal seam by the test borehole drilled in one of the anomalous areas.

Słowa kluczowe : microgravity, time lapse data, coal, gasification, control,
Wydawnictwo : Instytut Geofizyki PAN
Rocznik : 2015
Numer : Vol. 63, no. 3
Strony : 634 – 651
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Cytuj : Stanisławska, I. ,Popielawska, B. ,Vashisth, A. K. ,Rani, K. ,Singh, K. ,Kotyrba, A. ,Kortas, Ł. ,Stańczyk, K , Imaging the Underground Coal Gasification Zone with Microgravity Surveys. Acta Geophysica Vol. 63, no. 3/2015