发明名称 |
Method for increasing the calorific value of gas produced by the in situ combustion of coal |
摘要 |
The present invention relates to the production of relatively high Btu gas by the in situ combustion of subterranean coal. The coal bed is penetrated with a horizontally-extending borehole and combustion is initiated in the coal bed contiguous to the borehole. The absolute pressure within the resulting combustion zone is then regulated at a desired value near the pore pressure within the coal bed so that selected quantities of water naturally present in the coal will flow into the combustion zone to effect a hydrogen and carbon monoxide-producing steam-carbon reaction with the hot carbon in the combustion zone for increasing the calorific value of the product gas.
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申请公布号 |
US4095650(A) |
申请公布日期 |
1978.06.20 |
申请号 |
US19770823480 |
申请日期 |
1977.08.10 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE UNITED STATES DEPARTMENT OF ENERGY |
发明人 |
SHUCK, LOWELL Z. |
分类号 |
E21B43/243;E21B43/30;(IPC1-7):E21B43/24 |
主分类号 |
E21B43/243 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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