CN105756640A - SAGD horizontal well system - Google Patents
SAGD horizontal well system Download PDFInfo
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- CN105756640A CN105756640A CN201410779343.2A CN201410779343A CN105756640A CN 105756640 A CN105756640 A CN 105756640A CN 201410779343 A CN201410779343 A CN 201410779343A CN 105756640 A CN105756640 A CN 105756640A
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- horizontal well
- transfer pipeline
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Abstract
The invention provides a SAGD horizontal well system comprising two horizontal wells; the two horizontal wells comprise an upper horizontal well and a lower horizontal well; the SAGD horizontal well system also comprises a steam control device; the steam control device comprises a steam supply unit and a first convey pipe; either the upper or the lower horizontal well is connected with the steam supply unit through the first convey pipe; the first convey pipe is provided with a first flow gauge and a first electric control valve; the upper or lower horizontal well is connected with the steam supply unit through the first convey pipe, so the steam quantity injected in the horizontal well can be controlled; the steam control device can realize accurate steam injection measurement, so too much steam waste can be prevented while ensuring the heat demands of to be mined crude oil, thus further improving production unit net margin.
Description
Technical field
The present invention relates to the exploitation of reservoir region, in particular to a kind of SAGD horizontal well system.
Background technology
SAGD is at present in the world for technology that super heavy oil development is maximally efficient.This technique was divided into for two megastages, startup stage and the production phase.Startup stage in the world universal method be that the simultaneously steam injection of upper and lower horizontal well is circulated preheating, heat oil reservoir around pit shaft by conduction of heat, reduce viscosity, gradually build up upper and lower horizontal well heating power and hydraulic communication passages.Starting and namely proceed to the SAGD production phase after terminating, on the production phase, horizontal well continues steam injection, and lower horizontal well recovers the oil continuously.
SAGD technology has strict requirement to injecting quantity of steam, and quantity of steam is too low affects crude output；Quantity of steam is too high, wastes the energy, later stage crude Treatment causes very big difficulty.During the exploitation of SAGD well early stage, it is necessary to producing well and steam injection well are circulated preheating simultaneously, when normally producing, also need accurately control steam injection amount.Therefore the distribution of SAGD well well head steam, metering, the technology that controls are needed badly, but currently without the matured product that the steam of applicable SAGD well head distributes, measures and control.
Based on the problems referred to above, it is necessary to propose a kind of method, to solve prior art can not realize in prior art the on-demand steam injection problem of SAGD well.
Summary of the invention
Present invention is primarily targeted at a kind of SAGD horizontal well system of offer, to solve prior art can not realize the on-demand steam injection problem of SAGD well.
To achieve these goals, according to an aspect of the invention, it is provided a kind of SAGD horizontal well system, including two horizontal wells, and two horizontal wells are upper horizontal well and lower horizontal well, SAGD horizontal well system also includes vapor controlling device, and above-mentioned vapor controlling device includes: steam providing apparatus；First transfer pipeline, upper horizontal well is connected with steam providing apparatus by the first transfer pipeline with one of lower horizontal well, and the first transfer pipeline is provided with first-class gauge and the first electric control valve.
Further, above-mentioned first-class gauge and the first electric control valve set gradually along the direction away from steam providing apparatus.
Further, above-mentioned vapor controlling device also includes: the first secondary transfer pipeline, in parallel with the first transfer pipeline, and one end of the first secondary transfer pipeline is connected with steam providing apparatus, and the other end of the first secondary transfer pipeline is connected with upper horizontal well or lower horizontal well.
Further, above-mentioned vapor controlling device also includes: the first blood pressure lowering transfer pipeline, and top and first electric control valve of the first blood pressure lowering transfer pipeline are connected, and the end of the first blood pressure lowering transfer pipeline is connected with first-class gauge.
Further, above-mentioned vapor controlling device includes: the second transfer pipeline, and lower horizontal well is connected with steam providing apparatus by the second transfer pipeline, and the second transfer pipeline is provided with second gauge and the second electric control valve.
Further, above-mentioned second gauge and the second electric control valve set gradually along the direction away from steam providing apparatus.
Further, above-mentioned upper horizontal well is connected with steam providing apparatus by the first transfer pipeline, above-mentioned vapor controlling device also includes: the second secondary transfer pipeline, in parallel with the second transfer pipeline, one end of second secondary transfer pipeline is connected with steam providing apparatus, and the other end of the second secondary transfer pipeline is connected with lower horizontal well.
Further, above-mentioned vapor controlling device also includes: the second blood pressure lowering transfer pipeline, and top and second electric control valve of the second blood pressure lowering transfer pipeline are connected, and the end of the second blood pressure lowering transfer pipeline is connected with second gauge.
Application technical scheme, upper horizontal well or lower horizontal well are connected with steam providing apparatus by the first transfer pipeline, can realize the control of quantity of steam in Injection Level well, first calculate, according to the finimeter in target crude oil viscosity Ji Zangyou district, the heat that circulation preheating is required, and then obtain the quantity of steam needed；Afterwards, set according to the above-mentioned quantity of steam calculated and inject the gas injection rate of unit interval in steam course, last in actual gas injection process, persistently adjust vapor controlling device until the flow value that vapor controlling device shows stablizes the gas injection rate in the calculated unit interval before, namely metering the injected gas accurately is achieved by vapor controlling device, treat under the premise of the heat needed for crude oil extraction meeting, do not cause the waste of too much quantity of steam, further increase the net profit of production unit.
Accompanying drawing explanation
The Figure of description constituting the part of the application is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 illustrates the schematic diagram of the SAGD horizontal well system provided according to a kind of exemplary embodiment of the present invention；
Fig. 2 illustrates the schematic diagram of the vapor controlling device according to embodiments of the invention one；
Fig. 3 illustrates the schematic diagram of the vapor controlling device according to embodiments of the invention two；
Fig. 4 illustrates the schematic diagram of the vapor controlling device according to embodiments of the invention three；
Fig. 5 illustrates the schematic diagram of the vapor controlling device according to embodiments of the invention four；And
Fig. 6 illustrates the schematic diagram of the vapor controlling device according to embodiments of the invention five.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling:
10, upper horizontal well；
20, lower horizontal well；
41, steam providing apparatus；
42, the first transfer pipeline；
421, first-class gauge；
422, the first electric control valve；
43, the first secondary transfer pipeline；
44, the first blood pressure lowering transfer pipeline；
45, the second transfer pipeline；
451, second gauge；
452, the second electric control valve；
46, the second secondary transfer pipeline；
47, the second blood pressure lowering transfer pipeline.
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Introduce as background section, prior art exists the on-demand steam injection problem that can not realize SAGD well.In order to solve this problem, a kind of exemplary embodiment of the present invention provides a kind of SAGD horizontal well system, as shown in Figure 1, including two horizontal wells, and two horizontal wells are upper horizontal well 10 and lower horizontal well 20, SAGD horizontal well system also includes vapor controlling device, vapor controlling device includes steam providing apparatus 41 and the first transfer pipeline 42, upper horizontal well 10 is connected with steam providing apparatus 41 by the first transfer pipeline 42 with one of lower horizontal well 20, and the first transfer pipeline 42 is provided with first-class gauge 421 and the first electric control valve 422.
The present invention is connected with at least one horizontal well by vapor controlling device, it is possible to achieve to the control of quantity of steam in Injection Level well, first calculates, according to the finimeter in target crude oil viscosity Ji Zangyou district, the heat that circulation preheating is required, and then obtains the quantity of steam needed；Afterwards, set according to the above-mentioned quantity of steam calculated and inject the gas injection rate of unit interval in steam course, last in actual gas injection process, persistently adjust vapor controlling device until the flow value that vapor controlling device shows stablizes the gas injection rate in the calculated unit interval before, namely metering the injected gas accurately is achieved by vapor controlling device, treat under the premise of the heat needed for crude oil extraction meeting, do not cause the waste of too much quantity of steam, further increase the net profit of production unit.
Pass through said structure, vapor controlling device provides the steam that horizontal well circulation preheating is required, steam enters in horizontal well by the first transfer pipeline 42, first-class gauge 421 on first transfer pipeline 42 shows the instant flow in the first transfer pipeline 42, the first electric control valve 422 is utilized to adjust the flow of steam in the first transfer pipeline 42, make the numerical stability that first-class gauge 421 shows at the gas injection rate of above-mentioned calculated unit interval, namely realize relatively accurate gas injection rate with this.
Preferably, above-mentioned first-class gauge 421 and the first electric control valve 422 set gradually along the direction away from steam providing apparatus 41.This structural design is principally obtaining closer to the steam flow value entered in horizontal well, avoid making the instant flow value near steam providing apparatus 41 differ greatly with the instant flow value near horizontal well because the first transfer pipeline 42 is long, and the present invention is more concerned with entering the instant flow in horizontal well, the place of steam providing apparatus 41 it is arranged far from by first-class gauge 421 and the first electric control valve 422, so as the possibility that the instant flow value eliminating as much as first-class gauge 421 display brought because the first transfer pipeline 42 is long differs greatly with the instant flow value actually entering in horizontal well.
In embodiments of the invention two, as shown in Figure 2, vapor controlling device also includes: the first secondary transfer pipeline 43, this first secondary transfer pipeline 43 is in parallel with the first transfer pipeline 42, one end of first secondary transfer pipeline 43 is connected with steam providing apparatus 41, and the other end of the first secondary transfer pipeline 43 is connected with upper horizontal well 10 or lower horizontal well 20.
The cost consumed when can reduce improper production by this structure.When production runs into emergency situations, first transfer pipeline 42 can not normal operation time, the connection of steam providing apparatus 41 and the first transfer pipeline 42 can be cut off immediately, and connect the connection of steam providing apparatus 41 and the first secondary transfer pipeline 43, under ensureing the premise that horizontal well circulation preheating is performed continuously over, the problem checking rapidly the first transfer pipeline 42, in order to switch to the first transfer pipeline 42 in time, controls the flow of steam.Without the first secondary transfer pipeline 43, when the first transport pipeline goes wrong, can only quit work, then be likely to again send out into solidification phenomenon already at the crude oil of pre-Warm status before, and so as to front work consumes in vain.So the cost that the setting of structure consumes when greatly reducing improper production.
Preferably, in embodiments of the invention three, as it is shown on figure 3, vapor controlling device also includes: the first blood pressure lowering transfer pipeline 44, top and first electric control valve 422 of the first blood pressure lowering transfer pipeline 44 are connected, and the end of the first blood pressure lowering transfer pipeline 44 is connected with first-class gauge 421.
The buckling increased when reducing the flow of the first transfer pipeline 42 can be reduced by said structure.When the instant flow in the first transfer pipeline 42 is more than the flow of target unit time, the flow in the first transfer pipeline 42 is reduced by the first electric control valve 422, now the pressure in the first transfer pipeline 42 can increase, improve the risk of pressure disturbance in the first transfer pipeline 42, and the setting of the first blood pressure lowering transfer pipeline 44, can by steam diversion too much in the first transfer pipeline 42, return it to steam providing apparatus 41, in reducing the first transfer pipeline 42, namely while steam flow, also maintain the pressure in the first transfer pipeline 42.
More preferably, in embodiments of the invention four, as shown in Figure 4, above-mentioned upper horizontal well 10 is connected with steam providing apparatus 41 by the first transfer pipeline 42, above-mentioned vapor controlling device includes the second transfer pipeline 45, lower horizontal well 20 is connected with steam providing apparatus 41 by the second transfer pipeline 45, and the second transfer pipeline 45 is provided with second gauge 451 and the second electric control valve 452.
The setting of the second transfer pipeline 45 achieves synchronicity and the diversity of horizontal well 10 and the circulation preheating of lower horizontal well 20, as the mechanism above by the second upper horizontal well 10 of transfer pipeline 45 preheating, vapor controlling device provides the steam that horizontal well circulation preheating is required, steam enters in horizontal well by the second transfer pipeline 45, second gauge 451 on second transfer pipeline 45 shows the instant flow in the second transfer pipeline 45, the second electric control valve 452 is utilized to adjust the flow of steam in the second transfer pipeline 45, make numerical stability that second gauge 451 shows at the gas injection rate of above-mentioned calculated unit interval, namely relatively accurate gas injection rate is realized with this.
Preferably, above-mentioned second gauge 451 and the second electric control valve 452 set gradually along the direction away from steam providing apparatus 41.This structure to arrange the purpose that purpose and first-class gauge 421 and the first electric control valve 422 set gradually away from the direction of steam providing apparatus 41 the same, go out no longer burden at this and repeat.
Preferably, in embodiment five, as shown in Figure 5, vapor controlling device also includes: the second secondary transfer pipeline 46, in parallel with the second transfer pipeline 45, one end of the second secondary transfer pipeline 46 is connected with steam providing apparatus 41, and the other end of the second secondary transfer pipeline is connected with lower horizontal well 20.Same second secondary transfer pipeline 46 arrange with the first secondary transfer pipeline 43 to arrange purpose identical, no longer burdensome herein.
More preferably, in embodiments of the invention six, as shown in Figure 6, vapor controlling device also includes: the second blood pressure lowering transfer pipeline 47, top and second electric control valve 452 of the second blood pressure lowering transfer pipeline 47 are connected, and the end of the second blood pressure lowering transfer pipeline 47 is connected with second gauge 451.Same second blood pressure lowering transfer pipeline 47 arrange with the first blood pressure lowering transfer pipeline 44 to arrange purpose the same, no longer burdensome herein.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (8)
1. a SAGD horizontal well system, including two horizontal wells, and said two horizontal well is upper horizontal well (10) and lower horizontal well (20), it is characterised in that, described SAGD horizontal well system also includes vapor controlling device, and described vapor controlling device includes:
Steam providing apparatus (41)；
First transfer pipeline (42), described upper horizontal well (10) is connected with described steam providing apparatus (41) by described first transfer pipeline (42) with one of described lower horizontal well (20), and described first transfer pipeline (42) is provided with first-class gauge (421) and the first electric control valve (422).
2. SAGD horizontal well system according to claim 1, it is characterised in that described first-class gauge (421) and the first electric control valve (422) set gradually along the direction away from described steam providing apparatus (41).
3. SAGD horizontal well system according to claim 2, it is characterised in that described vapor controlling device also includes:
First secondary transfer pipeline (43), in parallel with described first transfer pipeline (42), one end of described first secondary transfer pipeline (43) is connected with described steam providing apparatus (41), and the other end of the described first secondary transfer pipeline (43) is connected with described upper horizontal well (10) or described lower horizontal well (20).
4. SAGD horizontal well system according to claim 2, it is characterised in that described vapor controlling device also includes:
First blood pressure lowering transfer pipeline (44), the top of described first blood pressure lowering transfer pipeline (44) is connected with described first electric control valve (422), and the end of described first blood pressure lowering transfer pipeline (44) is connected with described first-class gauge (421).
5. SAGD horizontal well system according to any one of claim 1 to 4, it is characterized in that, described upper horizontal well (10) is connected with described steam providing apparatus (41) by described first transfer pipeline (42), and described vapor controlling device includes:
Second transfer pipeline (45), described lower horizontal well (20) is connected with described steam providing apparatus (41) by described second transfer pipeline (45), and described second transfer pipeline (45) is provided with second gauge (451) and the second electric control valve (452).
6. SAGD horizontal well system according to claim 5, it is characterised in that described second gauge (451) and the second electric control valve (452) set gradually along the direction away from described steam providing apparatus (41).
7. SAGD horizontal well system according to claim 6, it is characterised in that described vapor controlling device also includes:
Second secondary transfer pipeline (46), in parallel with described second transfer pipeline (45), one end of described second secondary transfer pipeline (46) is connected with described steam providing apparatus (41), and the other end of the described second secondary transfer pipeline (46) is connected with described lower horizontal well (20).
8. SAGD horizontal well system according to claim 6, it is characterised in that described vapor controlling device also includes:
Second blood pressure lowering transfer pipeline (47), the top of described second blood pressure lowering transfer pipeline (47) is connected with described second electric control valve (452), and the end of described second blood pressure lowering transfer pipeline (47) is connected with described second gauge (451).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410779343.2A CN105756640A (en) | 2014-12-15 | 2014-12-15 | SAGD horizontal well system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410779343.2A CN105756640A (en) | 2014-12-15 | 2014-12-15 | SAGD horizontal well system |
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| CN105756640A true CN105756640A (en) | 2016-07-13 |
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| CN201410779343.2A Pending CN105756640A (en) | 2014-12-15 | 2014-12-15 | SAGD horizontal well system |
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| CN201190558Y (en) * | 2008-04-23 | 2009-02-04 | 东营市科美特工贸有限公司 | Supercharging water injection device |
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| CN203905930U (en) * | 2014-06-09 | 2014-10-29 | 北京大漠石油工程技术有限公司 | Steam flow adjusting and allocating device |
| CN204457701U (en) * | 2014-12-15 | 2015-07-08 | 中国石油天然气股份有限公司 | A kind of SAGD horizontal well system |
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2014
- 2014-12-15 CN CN201410779343.2A patent/CN105756640A/en active Pending
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Application publication date: 20160713 |