1. Methods:Use orthogonal test, act the swimming ability, soak time, decoct extraction time as changing factor, select L9(34)table to conduct test.

2. The influences of different injected rate, volume and soak time of solvent had been simulated to improve the permeability of the damaged region. And the permeability is also predicted after soak.

3. Rational soak time is:steam cavity of oil reservoir disappeared, decreasing speed is stable in the temperature field, and decline degree of pressure is stable.

4. Rational injected steam volume and soak time can be known through downhole monitoring of thermal regime.

5. The soak time allows any circuit capacitance to settle before the measurement begins.

6. Source voltage ( soak time ) - Model 7169 A relays normally open and Model 7158 relays remain normally closed.

7. The utility model shortens the soak time of the perforating fluid to the stratum and avoids a secondary pollution to the oil layer during a pulling operation process.

8. Again, the current is measured after the desired soak time.

9. For a long period of time, the determination of soak time relies on field experiences without a theoretic basis.

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10. The higher the fluorine content in the fluxes was and the longer the soak time of the fluxes in the water was, the more the fluorine would transfer into the water.

11. The test showed that the simulated results were influenced greatly by the soak time after heating, the current density and the sample shape.