METHODS FOR INCREASING OIL EXTRACTION

摘要

1. A method for determining the character of seismic activity of points on the earth surface of an oil field, characterized in that amplitudes of the microseismic waves are measured on the area greater than the oil field area, wherein after the first measurement a test vibroshock is performed, which is followed by a second measurement of microseismic waves, and establish the character of the point's activities on the selected area by the difference of said measurements. 2. The method of claim 1, characterized in that the area of the measurement of amplitudes of the microseismic waves is selected so that its linear dimensions must be about two times greater than that of the oil field. 3. The method of claim 2, characterized in that the test vibroshocks are performed during one or two days. 4. The method for carrying out vibroshocks on the earth surface for increasing oil extraction, characterized in that vibroshocks are performed in points, where the difference of amplitudes determined according to claims 1 or 2, prior to and after the vibroshocks, are maximum. 5. The method of claim 4, characterized in that the vibroshocks are performed in the range of 10 to 30 Hz. 6. The method of claim 5, characterized in that the vibroshocks are performed with the increasing frequency. 7. The method of claim 5, characterized in that the vibroshocks are performed with the decreasing frequency. 8. The method of claim 5, characterized in that the vibroshocks are performed with the variable frequency. 9. The method of claims 4 to 8, characterized in that the vibroshocks are performed during two to four weeks by 5 to 8 hours daily. 10. The method of claims 4 to 9, characterized in that the vibroshocks are performed periodically. 11. The method of claims 4 to 10, characterized in that the vibroshocks are performed at decreasing of oil extraction and/or lowering of pressure in an oil bed. 12. The method of claims 4 to 11, characterized in that the vibroshocks are performed at decreasing of oil extraction, but not bringing decreasing of oil extraction and/or lowering pressure in an oil bed to the level preceding to vibroshocks. 13. The method for determining points for oil production wells, characterized in that they are located on the oil field in points, where the difference of amplitudes determined according to claim 1, prior to and after the vibroshocks, are minimum.