| 摘要 |
Methods for treating a hydrocarbon containing formation prior to the use of an in situ heat treatment process to produce hydrocarbons from the formation include providing a first fluid comprising heated water or steam to a portion of the formation, wherein the first fluid is initially at a temperature below a dissociation temperature of nahcolite in the formation,-producing a second fluid from the portion, wherein the second fluid comprises nahcolite; providing heat from one or more heaters to the formation to heat the formation; and producing hydrocarbon fluids from the formation. As the solution mining progresses, the first fluid temperature may be increased so that the temperature of the first fluid that reaches nahcolite is below the dissocation temperature and so that the temperature of the first fluid is below a pyrolysis temperature of hydrocarbons in the formation. |
