| 摘要 |
A two-step process for recovering hydrocarbons from a subterranean formation in which the formation is first heated by injecting steam at a temperature of about 500 DEG to about 1500 DEG F. through an injection well and in a second step a mixture of carbon monoxide and hydrogen is pressured into the formation via the injection well where in the heated formation reaction with the carbon monoxide and steam takes place forming additional hydrogen and carbon dioxide and finally hydrocarbons are recovered via a production well. Optionally, after injection of the mixture of carbon monoxide and hydrogen into the formation has been terminated, the heat stored in the formation may be recovered by injecting water, as a drive fluid into the formation via the injection well. The injected water may contain a small amount of a sulfated interfacial tension reducer such as a compound of the formula: <IMAGE>
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