PROCEDURE FOR EXTRACTION OF FLUID HYDROCARBONS FROM UNDERGROUND RESERVOIR (VERSIONS) Russian patent published in 2011 - IPC E21B43/243 

FIELD: gas-and-oil producing industry.

SUBSTANCE: procedure consists in following stages: a) in constructing at least one pressure well for pumping gas-oxidiser into upper part of underground reservoir; and b) in constructing at least one producing well with basically horizontal section and with basically vertical producer connected to horizontal section. Also, an initial point of the horizontal section is located near connection with the vertical producer, while its end point is located on an opposite edge of the horizontal section. Further, the procedure consists in (c) pumping gas-oxidiser through the pressure well to perform intra-formation combustion with production of gaseous combustion products so, that gaseous combustion products are continuously moving aside in form of a front basically perpendicular to the horizontal section, while fluids come to the horizontal section; (d) in lowering a lifting pipe into the producer, in making a horizontal section for pressurising carbon-dioxide gas into the horizontal section of the producer near the front of combustion occurring at a distance on horizontal along the horizontal section of the producer; (e) in pumping medium including carbon-dioxide gas into the lifting pipe so, that said medium travels in the horizontal section along the lifting pipe and (f) in extracting hydrocarbons from producer at its horizontal section.

EFFECT: increased efficiency of inventions due to increased oil yield.

21 cl, 7 tbl, 3 dwg