CN204371132U - SAGD dual horizontal well cyclic preheat tubing string - Google Patents
SAGD dual horizontal well cyclic preheat tubing string Download PDFInfo
- Publication number
- CN204371132U CN204371132U CN201420762218.6U CN201420762218U CN204371132U CN 204371132 U CN204371132 U CN 204371132U CN 201420762218 U CN201420762218 U CN 201420762218U CN 204371132 U CN204371132 U CN 204371132U
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- horizontal well
- string
- tubing string
- steam
- dual horizontal
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- 230000009977 dual effect Effects 0.000 title claims abstract description 65
- 125000004122 cyclic group Chemical group 0.000 title claims abstract description 36
- 238000010796 Steam-assisted gravity drainage Methods 0.000 title claims abstract description 34
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 34
- 238000012544 monitoring process Methods 0.000 claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000009833 condensation Methods 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 16
- 239000003129 oil well Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 12
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 238000004891 communication Methods 0.000 abstract description 6
- 238000000605 extraction Methods 0.000 abstract description 4
- 230000005494 condensation Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 37
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
Abstract
The utility model provides a kind of SAGD dual horizontal well cyclic preheat tubing string, the production string being located at the upper horizontal well of dual horizontal well and lower horizontal well is inner, comprise by production string top to downward-extension and be arranged in parallel for inject to the horizontal segment of dual horizontal well steam steam injection string, for forming the lifting tubing string of liquid and the test string for level monitoring section temperature and pressure after extracting steam-condensation.When adopting this tubing string to carry out cyclic preheat, the steam injection string first to dual horizontal well injects steam, and steam is sprayed by screen casing and at dual horizontal well Inner eycle, steam heats oil reservoir in cyclic process and condensation liquefaction is liquid; Pass through lifting tubing string again by liquid extraction; In steam cycle process, monitored the temperature of the horizontal segment of dual horizontal well, pressure at any time by test string.Cyclic preheat tubing string of the present utility model can solve the problem that horizontal segment employs inequality and dual horizontal well interwell communication uniformity coefficient difference, can the whole horizontal segment of homogeneous heating.
Description
Technical field
The utility model relates to a kind of down-hole process pipe string, especially a kind of SAGD dual horizontal well cyclic preheat tubing string being applicable to heavy crude reservoir exploitation.
Background technology
SAGD (Steam Assistance Gravity Drive is called for short SAGD) is a cutting edge technology of exploitation super-heavy oil deposit, especially very large to the contribution of recovery ratio when being applied to dual horizontal well exploitation.SAGD dual horizontal well is extensive use abroad, and achieves good effect.SAGD dual horizontal well is by upper and lower parallel horizontal well to forming, and top is steam injection well, and bottom is producing well.Its general principle is using steam as heat medium, high-quality steam is injected continuously by steam injection well, steam is far smaller than crude oil and upwards onlap forms vapor chamber in the earth formation due to density, along with the continuous injection of steam, vapor chamber constantly expands, and by the thermal convection current of fluid and conduction of heat to heating crude oil, is reduced by the viscosity of crude heated, gravity is relied on to flow into horizontal production well together with condensed water, and by horizontal production well extraction.
Because cold oil original in oil reservoir is immobilising, therefore proceeding to before SAGD produces, must carry out preheating to well, object is the homogeneous heating realizing oil reservoir, and make to set up between steam injection well and producing well a unified thermal communication, this stage is warm-up phase.SAGD dual horizontal well is a kind of mining type of high investment, in order to obtain higher output, must shorten preheating time, sets up a unified thermal communication as early as possible between steam injection well and producing well.Adopt steam soak to carry out preheating during Block Du 84, Liaohe Oilfield SAGD pilot test, and obtain successfully in straight well+horizontal well combination well, but adopting steam soak to carry out preheating in dual horizontal well there is no successfully, show that horizontal segment employs inequality and dual horizontal well interwell communication uniformity coefficient is poor, so propose cyclic preheat technique, its principle be high-temperature steam only at horizontal well Inner eycle one circle, heat oil reservoir when not entering oil reservoir (or minute quantity enters oil reservoir) by heat exchange pattern.
Utility model content
The purpose of this utility model is to provide a kind of SAGD dual horizontal well cyclic preheat tubing string, and to realize cyclic preheat, the horizontal segment solved existing for prior art employs the problem of inequality and dual horizontal well interwell communication uniformity coefficient difference.
For achieving the above object, the utility model provides a kind of SAGD dual horizontal well cyclic preheat tubing string, its production string being located at the upper horizontal well of described dual horizontal well and lower horizontal well is inner, comprising: by described production string top to downward-extension and be arranged in parallel for inject to the horizontal segment of described dual horizontal well steam steam injection string, for forming the lifting tubing string of liquid and the test string for level monitoring section temperature and pressure after extracting steam-condensation.
SAGD dual horizontal well cyclic preheat tubing string as above, wherein, described steam injection string has the vacuum heat insulation tube extending to horizontal segment from the vertical section of described dual horizontal well, and the end of described vacuum heat insulation tube is connected with the first oil pipe, screen casing in turn.
SAGD dual horizontal well cyclic preheat tubing string as above, wherein, the steam injection string of described upper horizontal well extends to 2/3rds places of horizontal segment from heel, and the steam injection string of described lower horizontal well extends to the tiptoe place of horizontal segment.
SAGD dual horizontal well cyclic preheat tubing string as above, wherein, the screen casing of described steam injection string is evenly equipped with multiple steam injection through hole.
SAGD dual horizontal well cyclic preheat tubing string as above, wherein, described lifting tubing string has the second oil pipe being positioned at the vertical section of described dual horizontal well, is provided with sucker rod in described second oil pipe, and described second oil pipe end is connected with oil well pump.
SAGD dual horizontal well cyclic preheat tubing string as above, wherein, described test string has the 3rd oil pipe extending to horizontal segment from the vertical section of described dual horizontal well, the end of described 3rd oil pipe is connected with the monitoring instrument for level monitoring section temperature and pressure, and described monitoring instrument is connected with ground data acquisition system.
SAGD dual horizontal well cyclic preheat tubing string as above, wherein, the 3rd oil pipe of described test string is integral joint tubing.
SAGD dual horizontal well cyclic preheat tubing string as above, wherein, is provided with the test cable that two ends are connected with described monitoring instrument with described ground data acquisition system respectively in the 3rd oil pipe of described test string.
Feature and the advantage of SAGD dual horizontal well cyclic preheat tubing string of the present utility model are:
1, SAGD dual horizontal well cyclic preheat tubing string of the present utility model comprises the steam injection string of upper and lower horizontal well, lifting tubing string and test string, note simultaneously, adopt simultaneously, realize balanced flood, carry out continuous well temperature pressure monitoring by test string, realize the Real-Time Monitoring that note adopts parameter.Cyclic preheat tubing string of the present utility model can solve the problem that horizontal segment employs inequality and dual horizontal well interwell communication uniformity coefficient difference, can the whole horizontal segment of homogeneous heating.
2, SAGD dual horizontal well cyclic preheat tubing string of the present utility model is adopted to carry out the method for preheating, compared with preheating of handling up, horizontal segment is more even along Cheng Jiare, more be conducive to homogeneous heating dual horizontal well Jing Jian cold oil district, horizontal segment temperature field is significantly improved, and fewer than pre-hot formation water-holding quantity of handling up.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the utility model and explain, does not limit scope of the present utility model.Wherein,
Fig. 1 is the preheating tubing string of dual horizontal well well above the average;
Fig. 2 is the preheating tubing string of dual horizontal well middle and lower level well;
Fig. 3 is the schematic diagram in A-A cross section in Fig. 1 and Fig. 2;
Fig. 4 is the schematic diagram in B-B cross section in Fig. 1 and Fig. 2.
Critical element label declaration:
Horizontal well on 100
200 times horizontal wells
1 steam injection string
11 vacuum heat-insulation tubing strings
Pipe in 111 box cuplings 112
12 first oil pipes
13 screen casing 131 steam injection through holes
2 lifting tubing strings
21 second oil pipe 22 sucker rod 23 oil well pumps
25 box cuplings
3 test strings
31 the 3rd oil pipe 32 monitoring instrument 33 test cables
4 production strings
5 surface pipes
A heel b tiptoe
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and detailed description of the invention of the present utility model is described.
The utility model provides a kind of SAGD dual horizontal well cyclic preheat tubing string, as Fig. 1, shown in Fig. 2, during for recovering the oil, cyclic preheat is carried out to SAGD dual horizontal well, this preheating tubing string is located at the upper horizontal well 100 of dual horizontal well and production string 4 inside of lower horizontal well 200, production string 4 is sheathed in surface pipe 5, this preheating tubing string comprise by production string 4 top to downward-extension and be arranged side by side inject the steam injection string 1 of steam for the horizontal segment to dual horizontal well, for forming the lifting tubing string 2 of liquid and the test string 3 for level monitoring section temperature and pressure after extracting steam-condensation.
As shown in Figure 1, Figure 2, Figure 3 shows, in a specific embodiment, steam injection string 1 has the vacuum heat insulation tube 11 extending to horizontal segment from the vertical section of dual horizontal well, and the end of vacuum heat insulation tube 11 is connected with the first oil pipe 12, screen casing 13 in turn.Vacuum heat insulation tube 11 coefficient of thermal conductivity is low, can reduce the thermal loss of steam injection, and improve heat utilization efficiency, in addition, vacuum heat insulation tube 11 also can play certain heat-blocking action, prevents vapor (steam) temperature too high, causes the damage of down-hole string; First oil pipe 12 is located between vacuum heat insulation tube 11 and screen casing 13, plays conversion and connects.Wherein, vacuum heat insulation tube 11 is made up of interior pipe 112 and the outer tube be set in outside interior pipe, forms heat insulation path between outer tube and interior pipe, in the present embodiment, interior pipe 112 internal diameter of vacuum heat insulation tube is 50mm, and outer tube diameter is 89mm, and box cupling 111 external diameter of vacuum heat insulation tube 11 is 108mm.The utility model adopts the vacuum heat insulation tube 11 of prior art, therefore no longer elaborates to it.
In addition, the screen casing 13 of steam injection string 1 is evenly equipped with multiple steam injection through hole 131, the steam injected to steam injection string 1 is sprayed by steam injection through hole 131, and at dual horizontal well Inner eycle to heat oil reservoir.
As shown in Figure 1 and Figure 2, in a preferred embodiment, the steam injection string 1 of upper horizontal well 100 extends to 2/3rds places of horizontal segment from heel a, and the steam injection string 1 of lower horizontal well 200 extends to the tiptoe b place of horizontal segment.Steam injection string 1 due to upper horizontal well 100 and lower horizontal well 200 is lowered into the diverse location of horizontal segment, therefore can the whole horizontal segment of homogeneous heating, prevents hot-spot from causing steam to break through.
In another specific embodiment, lifting tubing string 2 have be positioned at the vertical section of dual horizontal well the second oil pipe 21, second oil pipe 21 in be provided with sucker rod 22, the second oil pipe 21 end is connected with oil well pump 23.Wherein, sucker rod 22 is also connected with oil well pump 23.Steam in dual horizontal well heats object oil reservoir in cyclic process, and loses mass dryness fraction condensation formation aqueous water, by lifting tubing string 2 by aqueous water extraction ground.In the present embodiment, the internal diameter of the box cupling 25 of the second oil pipe 21 is 62mm, and external diameter is 89mm; Wherein the lower-continuous mapping of oil well pump 23 controls in the hole angle degree of depth corresponding within 50 degree, and discharge capacity is more than 80t/d.
In a feasible embodiment, test string 3 has the 3rd oil pipe 31 extending to horizontal segment from the vertical section of dual horizontal well, the end of the 3rd oil pipe 31 is connected with the monitoring instrument 32 for level monitoring section temperature and pressure, and monitoring instrument 32 is connected with ground data acquisition system.In steam cycle process, carried out temperature, the pressure distribution situation of Real-Time Monitoring horizontal segment by monitoring instrument 32.Because the monitoring instrument of level monitoring well temperature and pressure is routine techniques, therefore do not repeat.
Wherein, the 3rd oil pipe 31 of test string 3 is integral joint tubing.Adopt integral joint tubing, the situation larger compared to other Coupled tubing external diameters, easier rountrip.In the present embodiment, the external diameter of integral joint tubing is 48mm, and the internal diameter of the production string 4 outside it is 220mm.
In addition, as shown in Figure 4, the test cable 33 that two ends are connected with monitoring instrument 32 with ground data acquisition system is respectively provided with in the 3rd oil pipe 31 of test string 3.
Above-mentioned SAGD dual horizontal well cyclic preheat tubing string is adopted to carry out the method for preheating, comprise: the steam injection string 1 to dual horizontal well injects steam, steam is sprayed by screen casing 13 and at dual horizontal well Inner eycle, steam heats oil reservoir in cyclic process and condensation liquefaction is liquid; Pass through lifting tubing string 2 again by liquid extraction; In steam cycle process, monitored the temperature of the horizontal segment of dual horizontal well, pressure at any time by test string 3.
Specifically, the mass dryness fraction injected by steam injection string 1 be 95% high-quality steam enter screen casing 13 via vacuum heat insulation tube 11, first oil pipe 12, sprayed by steam injection through hole 131 and enter horizontal well Inner eycle, the circulation of superheated steam makes net horizontal section form higher temperature field, and heat object oil reservoir by loss mass dryness fraction, wherein carry out transferring heat mainly through heat exchange pattern.
In the process of cyclic preheat, according to temperature, the pressure distribution situation of the dual horizontal well horizontal segment that ground data acquisition system gathers, adjust the injection rate of steam and the produced quantity of liquid at any time, to make bottom pressure remain on 3.0MPa, and make vapor (steam) temperature maintain more than 200 DEG C.Making bottom pressure remain on about 3.0MPa, being conducive to steam homogeneous heating object oil reservoir when not entering object oil reservoir, and the extraction not easily making steam too fast, and heat energy can not be wasted; In addition, make vapor (steam) temperature maintain more than 200 DEG C, can make full use of steam heat to heat object oil reservoir, practical operation empirical evidence, if temperature is too low, heating effect is not remarkable.
The foregoing is only the schematic detailed description of the invention of the utility model, and be not used to limit scope of the present utility model.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present utility model and principle and amendment, all should belong to the scope of the utility model protection.And it should be noted that, each ingredient of the present utility model is not limited in above-mentioned overall applicability, the each technical characteristic described in manual of the present utility model can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, the utility model covers other relevant with this case inventive point in the nature of things and combines and embody rule.
Claims (8)
1. a SAGD dual horizontal well cyclic preheat tubing string, be located at the upper horizontal well of described dual horizontal well and the production string inside of lower horizontal well, it is characterized in that, described preheating tubing string comprises: by described production string top to downward-extension and be arranged in parallel for inject to the horizontal segment of described dual horizontal well steam steam injection string, for forming the lifting tubing string of liquid and the test string for level monitoring section temperature and pressure after extracting steam-condensation.
2. SAGD dual horizontal well cyclic preheat tubing string as claimed in claim 1, it is characterized in that, described steam injection string has the vacuum heat insulation tube extending to horizontal segment from the vertical section of described dual horizontal well, and the end of described vacuum heat insulation tube is connected with the first oil pipe, screen casing in turn.
3. SAGD dual horizontal well cyclic preheat tubing string as claimed in claim 2, it is characterized in that, the steam injection string of described upper horizontal well extends to 2/3rds places of horizontal segment from heel, and the steam injection string of described lower horizontal well extends to the tiptoe place of horizontal segment.
4. SAGD dual horizontal well cyclic preheat tubing string as claimed in claim 2, is characterized in that, the screen casing of described steam injection string is evenly equipped with multiple steam injection through hole.
5. SAGD dual horizontal well cyclic preheat tubing string as claimed in claim 1, it is characterized in that, described lifting tubing string has the second oil pipe being positioned at the vertical section of described dual horizontal well, is provided with sucker rod in described second oil pipe, and described second oil pipe end is connected with oil well pump.
6. SAGD dual horizontal well cyclic preheat tubing string as claimed in claim 1, it is characterized in that, described test string has the 3rd oil pipe extending to horizontal segment from the vertical section of described dual horizontal well, the end of described 3rd oil pipe is connected with the monitoring instrument for level monitoring section temperature and pressure, and described monitoring instrument is connected with ground data acquisition system.
7. SAGD dual horizontal well cyclic preheat tubing string as claimed in claim 6, it is characterized in that, the 3rd oil pipe of described test string is integral joint tubing.
8. SAGD dual horizontal well cyclic preheat tubing string as claimed in claim 6, is characterized in that, be provided with the test cable that two ends are connected with described monitoring instrument with described ground data acquisition system respectively in the 3rd oil pipe of described test string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420762218.6U CN204371132U (en) | 2014-12-05 | 2014-12-05 | SAGD dual horizontal well cyclic preheat tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420762218.6U CN204371132U (en) | 2014-12-05 | 2014-12-05 | SAGD dual horizontal well cyclic preheat tubing string |
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| Publication Number | Publication Date |
|---|---|
| CN204371132U true CN204371132U (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420762218.6U Expired - Fee Related CN204371132U (en) | 2014-12-05 | 2014-12-05 | SAGD dual horizontal well cyclic preheat tubing string |
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| Country | Link |
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| CN (1) | CN204371132U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487887A (en) * | 2018-05-31 | 2018-09-04 | 西南石油大学 | A kind of super-heavy oil deposit exploitation mechanism and method |
| CN109138976A (en) * | 2018-07-23 | 2019-01-04 | 中国石油天然气股份有限公司 | Dual horizontal well preheats the judgment method and dual horizontal well preheating device for turning SAGD opportunity |
| CN110206532A (en) * | 2019-05-27 | 2019-09-06 | 中国海洋石油集团有限公司 | The monitoring of horizontal well output and intelligent control integratedization completion tool and application method |
| CN114575924A (en) * | 2022-03-11 | 2022-06-03 | 浙江大学 | Cavity building pipe column and cavity building method for horizontal cavity of underground salt rock energy storage |
-
2014
- 2014-12-05 CN CN201420762218.6U patent/CN204371132U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108487887A (en) * | 2018-05-31 | 2018-09-04 | 西南石油大学 | A kind of super-heavy oil deposit exploitation mechanism and method |
| CN109138976A (en) * | 2018-07-23 | 2019-01-04 | 中国石油天然气股份有限公司 | Dual horizontal well preheats the judgment method and dual horizontal well preheating device for turning SAGD opportunity |
| CN109138976B (en) * | 2018-07-23 | 2022-01-04 | 中国石油天然气股份有限公司 | Method for judging time for converting double-horizontal-well preheating into SAGD (steam assisted gravity drainage) and double-horizontal-well preheating device |
| CN110206532A (en) * | 2019-05-27 | 2019-09-06 | 中国海洋石油集团有限公司 | The monitoring of horizontal well output and intelligent control integratedization completion tool and application method |
| CN114575924A (en) * | 2022-03-11 | 2022-06-03 | 浙江大学 | Cavity building pipe column and cavity building method for horizontal cavity of underground salt rock energy storage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 |