Method for thermoshaft oil production
First Claim
1. A method for thermoshaft oil production of viscous oils or fluid bitumens wherein mining openings are provided above an oil-bearing bed at an overburden level comprising forming said mining openings with an inclination of from about 1°
- to about 3°
to the horizon;
drilling injection holes from said mining openings for feeding a heating medium into said oil-bearing bed;
constructing a slope and a footway from at least one mine opening leading to the bottom part of said oil-bearing bed to a production gallery which is provided within the bottom part of said bed;
drilling a system of horizontal and ascending holes for oil production from said production gallery;
positively feeding a heating medium into said injection holes for uniform distribution thereof over the entire volume of said oil-bearing bed and for displacement of oil into said horizontal and ascending production holes towards said production gallery; and
recovering the oil from said production gallery.
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Abstract
The method for thermoshaft oil production comprises the provision of a combination of mining holes above an oil-bearing bed which are inclined at from 1° to 3° to the horizon. Then injection holes are drilled from these mining openings for feeding a heating medium into the bed. After that, a slope and a footway leading to the bottom part of the oil-bearing bed are constructed, and a production gallery is provided within the bottom part of the bed. Horizontal and ascending holes are drilled from the production gallery for oil production. A heating medium is fed into the injection holes for uniform distribution thereof over the entire volume of the oil-bearing bed and for displacement of oil into the horizontal and ascending production holes towards the production gallery wherefrom the oil is fed up to the surface.
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Citations
6 Claims
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1. A method for thermoshaft oil production of viscous oils or fluid bitumens wherein mining openings are provided above an oil-bearing bed at an overburden level comprising forming said mining openings with an inclination of from about 1°
- to about 3°
to the horizon;
drilling injection holes from said mining openings for feeding a heating medium into said oil-bearing bed;
constructing a slope and a footway from at least one mine opening leading to the bottom part of said oil-bearing bed to a production gallery which is provided within the bottom part of said bed;
drilling a system of horizontal and ascending holes for oil production from said production gallery;
positively feeding a heating medium into said injection holes for uniform distribution thereof over the entire volume of said oil-bearing bed and for displacement of oil into said horizontal and ascending production holes towards said production gallery; and
recovering the oil from said production gallery. - View Dependent Claims (2, 3, 4, 5, 6)
- to about 3°
Specification