CN211174064U - Double horizontal well production well branch well structure of SAGD viscous crude - Google Patents
Double horizontal well production well branch well structure of SAGD viscous crude Download PDFInfo
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- CN211174064U CN211174064U CN201921888621.2U CN201921888621U CN211174064U CN 211174064 U CN211174064 U CN 211174064U CN 201921888621 U CN201921888621 U CN 201921888621U CN 211174064 U CN211174064 U CN 211174064U
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Abstract
The embodiment of the utility model provides a two horizontal well production well branch well structures of SAGD viscous crude, a serial communication port, two horizontal well production well branch well structures of SAGD viscous crude include: gas injection wells, production wells, a1 lateral, B1 lateral, and a2 lateral; the gas injection well and the production well are horizontal wells, and the gas injection well is positioned above the production well; a1 is obliquely arranged on the gas injection well; the A2 branch is obliquely arranged on the A1 branch; the B1 lateral is positioned diagonally upward on the production well.
Description
Technical Field
The utility model relates to an oil field especially relates to a two horizontal well production well branch well structures of SAGD viscous crude.
Background
China and other places in the world have rich thickened oil resources, and the SAGD (gravity assisted steam drainage) double-horizontal well development technology used at present becomes the mainstream technology. As the heavy oil reservoir is mostly a continental phase stratum, the phase change is frequent in the plane and the longitudinal direction, and the interlayer in the oil reservoir is numerous, the oil reservoir is divided and isolated, and the existence of the interlayer creates a great obstacle for the further fine development of the heavy oil.
In the process of implementing the present invention, the inventor finds that there are at least the following problems in the prior art: the efficiency of exploiting the thick oil is low, and the production well has poor capacity of receiving the thick oil above.
SUMMERY OF THE UTILITY MODEL
The utility model provides a two horizontal well production well branch well structures of SAGD viscous crude, it has to adopt viscous crude efficient, and the advantage that the viscous crude ability is strong is accepted to the production well.
The utility model provides a two horizontal well production well branch well structures of SAGD viscous crude, two horizontal well production well branch well structures of SAGD viscous crude include: gas injection wells, production wells, a1 lateral, B1 lateral, and a2 lateral;
the gas injection well and the production well are horizontal wells, and the gas injection well is positioned above the production well;
a1 is obliquely arranged on the gas injection well;
the A2 branch is obliquely arranged on the A1 branch;
the B1 lateral is positioned diagonally upward on the production well.
Preferably, the SAGD viscous crude double horizontal well production well lateral well structure still includes: and the B2 branch well is obliquely and upwards arranged on the B1 branch well and is parallel to the A2 branch well.
Preferably, the B1 branch well is parallel to the A1 branch well.
Preferably, the vertical distance between the A1 branch well and the B1 branch well is within 3-10m, and the horizontal distance is within 0-10 m.
Preferably, the vertical distance between the A2 branch well and the B2 branch well is within 3-10m, and the horizontal distance is within 0-10 m.
Preferably, the lengths of the A1 branch well and the B1 branch well are less than or equal to 300m, the included angle between the A1 branch well and the gas injection well is not more than 40 degrees, and the included angle between the B1 branch well and the production well is not more than 40 degrees.
Preferably, the length of the A2 branch well and the B2 branch well is less than or equal to 300m, the included angle between the A2 branch well and the A1 branch well is not more than 30 degrees, and the included angle between the B2 branch well and the B1 branch well is not more than 30 degrees.
Preferably, the gas injection well is provided with a plurality of A1 branch wells and A2 branch wells.
Preferably, the production well is provided with a plurality of B1 branch wells and B2 branch wells.
The technical scheme has the following beneficial effects: because the technical means of a plurality of branch wells is adopted, the technical effect of improving the recovery efficiency of the thickened oil is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the present invention excavating only a B1 lateral;
fig. 2 is a schematic diagram of the present invention excavating a B1 lateral and a B2 lateral.
Reference numerals: 1. gas injection well, 2. production well, 3.A1 multilateral well, 4.B1 multilateral well, 5.A2 multilateral well, 6.B2 multilateral well.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model provides a two horizontal well production well offset well structures of SAGD viscous crude, as shown in figure 1, two horizontal well production well offset well structures of SAGD viscous crude include: gas injection well 1, production well 2, a1 lateral 3, B1 lateral 4, and a2 lateral 5;
the gas injection well and the production well are horizontal wells, and the gas injection well is positioned above the production well;
the A2 branch well 5 is arranged on the A1 branch well in an inclined upward direction;
the B1 branch well 4 is arranged on the production well in an inclined upward direction; the quantity of the produced thick oil is enlarged through the A1 branch well and the A2 branch well, and the thick oil produced by the A1 branch well and the A2 branch well is received through the B1 branch well and then flows into the production well; only the B1 branch well is excavated, so that the site construction time and cost are saved; in order to save the site construction time and cost, only one B1 branch well can be constructed, and sidetracking is not performed, and the B1 branch well and the A1 branch well are approximately overlapped.
Preferably, as shown in fig. 2, the SAGD heavy oil double horizontal well production well lateral well structure further includes: the B2 branch well is obliquely and upwards arranged on the B1 branch well and is parallel to the A2 branch well; the two are parallel, and the thick oil in the A2 branch well can conveniently flow into the B2 branch well 6.
Preferably, the B1 branch well is parallel to the A1 branch well, so that thick oil in the A1 branch well can flow into the B1 branch well conveniently.
Preferably, the vertical distance between the A1 branch well and the B1 branch well is within 3-10m, and the horizontal distance is within 0-10 m; the thick oil in the A1 branch well can better flow into the B1 branch well within the distance.
Preferably, the vertical distance between the A2 branch well and the B2 branch well is within 3-10m, and the horizontal distance is within 0-10 m; the thick oil in the A2 branch well can better flow into the B2 branch well within the distance.
Preferably, the lengths of the A1 branch well and the B1 branch well are less than or equal to 300m, the included angle between the A1 branch well and the gas injection well is not more than 40 degrees, and the included angle between the B1 branch well and the production well is not more than 40 degrees; the 40 degrees is the limit angle of site construction, and the danger is increased when the value is exceeded.
Preferably, the length of the A2 branch well and the B2 branch well is less than or equal to 300m, the included angle between the A2 branch well and the A1 branch well is not more than 30 degrees, and the included angle between the B2 branch well and the B1 branch well is not more than 30 degrees; the 30 degrees are limit angles of site construction, and the danger is increased when the 30 degrees are exceeded.
Preferably, the gas injection well is provided with a plurality of A1 branch wells and A2 branch wells; the arrangement of a plurality of A1 branch wells and A2 branch wells leads to more efficient production of thick oil.
Preferably, the production well is provided with a plurality of B1 branch wells and B2 branch wells; the arrangement of a plurality of B1 branch wells and B2 branch wells enables the thick oil to be received more efficiently.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a two horizontal well production well lateral well structures of SAGD viscous crude, its characterized in that, two horizontal well production well lateral well structures of SAGD viscous crude include: gas injection wells, production wells, a1 lateral, B1 lateral, and a2 lateral;
the gas injection well and the production well are horizontal wells, and the gas injection well is positioned above the production well;
a1 is obliquely arranged on the gas injection well;
the A2 branch is obliquely arranged on the A1 branch;
the B1 lateral is positioned diagonally upward on the production well.
2. The SAGD thick oil dual horizontal well production well lateral well structure of claim 1, further comprising: and the B2 branch well is obliquely and upwards arranged on the B1 branch well and is parallel to the A2 branch well.
3. The SAGD heavy oil double horizontal well production well lateral well structure of claim 1, wherein the B1 lateral well is parallel to the A1 lateral well.
4. The SAGD heavy oil double horizontal well production well lateral well structure of claim 1, wherein the vertical distance between the A1 lateral well and the B1 lateral well is within 3-10m, and the horizontal distance is within 0-10 m.
5. The SAGD heavy oil double horizontal well production well lateral well structure of claim 2, wherein the vertical distance between the A2 lateral well and the B2 lateral well is within 3-10m, and the horizontal distance is within 0-10 m.
6. The SAGD heavy oil double horizontal well production well lateral well structure of claim 1, wherein the lengths of the A1 lateral well and the B1 lateral well are 300m or less, the included angle between the A1 lateral well and the gas injection well is not more than 40 degrees, and the included angle between the B1 lateral well and the production well is not more than 40 degrees.
7. The SAGD heavy oil double horizontal well production well lateral well structure of claim 2, wherein the lengths of the A2 lateral well and the B2 lateral well are less than or equal to 300m, the included angle between the A2 lateral well and the A1 lateral well is not more than 30 degrees, and the included angle between the B2 lateral well and the B1 lateral well is not more than 30 degrees.
8. The SAGD heavy oil dual horizontal well production well lateral well structure of claim 1, wherein the gas injection well is provided with a plurality of A1 lateral wells and A2 lateral wells.
9. The SAGD heavy oil dual horizontal well production well lateral well structure of claim 1, wherein the production well is provided with a plurality of B1 lateral wells and B2 lateral wells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921888621.2U CN211174064U (en) | 2019-11-04 | 2019-11-04 | Double horizontal well production well branch well structure of SAGD viscous crude |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921888621.2U CN211174064U (en) | 2019-11-04 | 2019-11-04 | Double horizontal well production well branch well structure of SAGD viscous crude |
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| CN211174064U true CN211174064U (en) | 2020-08-04 |
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| CN201921888621.2U Active CN211174064U (en) | 2019-11-04 | 2019-11-04 | Double horizontal well production well branch well structure of SAGD viscous crude |
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