RU2014153492A

RU2014153492A - IN SITU OIL SAND EXTRACTION BY AMMONIA

Info

Publication number: RU2014153492A
Application number: RU2014153492A
Authority: RU
Inventors: Пол Р. ХАРТ
Original assignee: Налко Компани
Priority date: 2012-06-05
Filing date: 2013-05-31
Publication date: 2016-07-27
Also published as: WO2013184506A1; RU2618798C2

Abstract

1. Способ добычи нефти из подземного резервуара, включающий:введение безводного газообразного аммиака в подземный резервуар при более высокой температуре, чем температура резервуара, и при давлении, которое позволяет газообразному аммиаку заполнять полости в подземном резервуаре,причем при контакте с нефтью в подземном резервуаре газообразный аммиак конденсируется с образованием жидкого аммиака,и жидкий аммиак вступает во взаимодействие с компонентами нефти с образованием поверхностно-активных веществ, которые способствуют образованию эмульсии нефти в аммиаке; иизвлечение эмульсии нефти в аммиаке из подземного резервуара.2. Способ по п. 1, дополнительно включающий:понижение давления эмульсии нефти в аммиаке для испарения аммиака и его обратного превращения в газообразный аммиак; исбор газообразного аммиака.3. Способ по п. 2, дополнительно включающий:повышение давления и нагревание собранного газообразного аммиака; иповторное введение сжатого и нагретого газообразного аммиака в подземный резервуар при более высокой температуре, чем температура резервуара, и при давлении, которое позволяет газообразному аммиаку заполнять полости в подземном резервуаре.4. Способ по п. 1, в котором газообразный аммиак вводят в подземный резервуар через нагнетательную скважину, и эмульсиюнефти в аммиаке извлекают через эксплуатационную скважину.5. Способ по п. 4, в котором нагнетательная скважина и эксплуатационная скважина представляют собой одну и ту же скважину.6. Способ по п. 4, в котором нагнетательная скважина и эксплуатационная скважина представляют собой отдельные скважины, причем в качестве нагнетательной и эксплуатационной скваж1. A method of extracting oil from an underground reservoir, including: introducing anhydrous gaseous ammonia into the underground reservoir at a temperature higher than the temperature of the reservoir, and at a pressure that allows ammonia gas to fill cavities in the underground reservoir, and when in contact with the oil in the underground reservoir, gaseous ammonia condenses to form liquid ammonia, and liquid ammonia interacts with oil components to form surfactants that contribute to the formation of mania oil emulsions in ammonia; extracting an oil emulsion in ammonia from an underground reservoir. 2. The method of claim 1, further comprising: lowering the pressure of the oil emulsion in ammonia to vaporize the ammonia and convert it back to gaseous ammonia; ammonia gas sampling. 3. The method according to claim 2, further comprising: increasing the pressure and heating the collected gaseous ammonia; and the repeated introduction of compressed and heated gaseous ammonia into the underground tank at a higher temperature than the temperature of the tank and at a pressure that allows gaseous ammonia to fill the cavities in the underground tank. 4. The method according to claim 1, wherein gaseous ammonia is introduced into the underground reservoir through the injection well, and the oil emulsion in ammonia is extracted through the production well. The method of claim 4, wherein the injection well and the production well are the same well. The method according to claim 4, in which the injection well and production well are separate wells, moreover, as the injection and production wells

Claims

1. The method of oil production from an underground reservoir, including:

introducing anhydrous gaseous ammonia into the underground tank at a higher temperature than the temperature of the tank and at a pressure that allows gaseous ammonia to fill cavities in the underground tank,

moreover, upon contact with oil in an underground reservoir, gaseous ammonia condenses to form liquid ammonia,

and liquid ammonia reacts with the components of the oil to form surfactants that contribute to the formation of an oil emulsion in ammonia; and

extracting an emulsion of oil in ammonia from an underground reservoir.

2. The method according to p. 1, further comprising:

lowering the pressure of the oil emulsion in ammonia to evaporate ammonia and its reverse transformation into gaseous ammonia; and

collection of gaseous ammonia.

3. The method according to p. 2, further comprising:

increasing pressure and heating the collected gaseous ammonia; and

re-introducing compressed and heated gaseous ammonia into the underground tank at a higher temperature than the temperature of the tank and at a pressure that allows gaseous ammonia to fill the cavities in the underground tank.

4. The method according to p. 1, in which gaseous ammonia is introduced into the underground reservoir through the injection well, and the emulsion

oil in ammonia is recovered through a production well.

5. The method of claim 4, wherein the injection well and the production well are the same well.

6. The method according to claim 4, in which the injection well and production well are separate wells, and vertical wells and horizontal wells are independently selected as the injection and production wells.

7. The method according to p. 1, in which the underground reservoir includes a wettable oil acid-soluble formation of the carbonate type.

8. The method according to p. 1, in which the emulsion of oil in ammonia contains from 10 to 50 wt.% Crude oil in liquid ammonia.