Method of thermal-mine working of oil reservoir

Details Method of thermal-mine working of oil reservoir Method of thermal-mine working of oil reservoir

E - Fixed Constructions

21

B

166/39

E21B 43/24 (2006.01)

Patent

CA 1145670

METHOD OF THERMAL-MINE WORKING OF OIL RESERVOIR Abstract of the Disclosure The method of thermal-mine working of an oil reservoir includes providing at least one injection gallery and a re- covery gallery and drilling therefrom, rescectively, inject- ion and recovery wells. The formation is heated up by feed- ing a heat carrier into the injection wells, and oil with associated water thus evolved are withdrawn through the recovery wells. The associated water is separated from the oil and pumped into the oil-bearing formation, to assist in driving-out the oil. The recovered oil is conveyed to the ground surface through the mine workings. At least one auxiliary well is also drilled, to connect directly the re- covery gallery and the injection one, and a pipe line is mounted in this auxiliary well, spaced from the walls of the bore thereof. Oil and associated water are separated directly within the recovery gallery. The associated water thus obtained is conveyed via the pipe line to the injection gallery, to be fed into the injection wells, while at the sa- me time oil and associated water are recovered through the annular space between the pipe line and the walls of the auxiliary well.

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