The Maoming oil shale in China is easy to recover due to the shallow rich layer and mild dip angle. The mining technology has been developed rapidly in the past few years, which brings not only significant profit but also severe environmental problems. The oil shale in-situ processing technologies show a promising future in China. The geological characters of the Maoming oil shale imply the advantages of in-situ processing. Heating the oil shale formation is an essential process during the in-situ processing and the prediction of temperature distribution is extremely significant. This paper analyzed the mechanism of heat transfer, physical and chemical change. The mathematical model for the temperature distribution was established considering temperature effect on the heat conductivity, chemical reaction, and heat loss to the upper and bottom layers. Then the heating well pattern of triangle, square and hexagon were simulated. At last the sensitivity of the main influence factors of the temperature distribution was analyzed. The results show that the heat loss, heat conductivity, and heating power play the important roles in temperature distribution. The optimization of heating parameters could shorten the heating time for the oil shale from initial temperature to required temperature, which makes a great sense to the improvement of heating efficiency for the development of Maoming oil shale.
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