CN107201891A - A kind of handled up follow-up turn suitable for offshore viscous oil field drives the method developed - Google Patents
A kind of handled up follow-up turn suitable for offshore viscous oil field drives the method developed Download PDFInfo
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- CN107201891A CN107201891A CN201710623955.6A CN201710623955A CN107201891A CN 107201891 A CN107201891 A CN 107201891A CN 201710623955 A CN201710623955 A CN 201710623955A CN 107201891 A CN107201891 A CN 107201891A
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- steam
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- oil field
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Abstract
The method developed is driven the present invention relates to a kind of handled up follow-up turn suitable for offshore viscous oil field, it is characterised in that：For oil viscosity between 350mPas and 1000mPas, turn the development scheme of steam drive using steam soak, specifically, initial stage of development uses the development scheme of steam soak, development scheme that is follow-up then being driven using steam.The present invention, which proposes to handle up suitable for offshore viscous oil field progress, to be turned to drive turning drive mode, rationally turning drive opportunity and optimal injection parameter etc. for exploitation, the shortcomings of overcoming current thermal recovery scheme steam soak round and platform device restricted lifetime, meets the requirement of the follow-up substituted technique of Offshore Heavy Oil Field thermal recovery.The present invention provides important directive significance to the follow-up exploitation for turning to drive oil field at sea of handling up.
Description
Technical field
The method developed is driven the present invention relates to a kind of handled up follow-up turn suitable for offshore viscous oil field, belongs to oil-gas field development
Technical field.
Background technology
The average waterflood recovery efficiency factor of current China offshore viscous oil field is only 18%, when oil viscosity is more than 350mPa
During s, recovery ratio is typically below 10%.It is similar in order to obtain and land heavy crude heat extraction recovery ratio is general more than 30% at present
The higher recovery ratio of land viscous crude field, thermal recovery is an imperative paths.By taking heavy oil as an example, when in-place oil is viscous
When degree is less than 350mPas, waterflood recovery efficiency factor is more than 15%, and orientation well capacity is generally higher than 43m3/ d, horizontal productivity
Generally higher than 90m3/d.When oil viscosity is more than 350mPas, production capacity and recovery ratio significantly decline.With prince wife Cao
Exemplified by pasture 11-1, south fort 35-2, orientation well capacity is 18m3/ d, horizontal productivity is 35m3/d-55m3/ d, recovery ratio difference is only
For 7.8% and 4.2%, therefore, replacing exploitation side is needed badly for the unconventional viscous crude that oil viscosity is more than 350mPas
Formula.
On the basis of the onshore oil field exploitation such as the investigation Liaohe River, triumph, Xinjiang, when oil viscosity is between 350mPa
Current thermal recovery scheme steam soak round is 9 wheels, 8 years or so production time, offshore platform equipment longevity between s and 1000mPas
Life is limited, is considered as substituted technique after handling up；The Simulation on whole pay zones experiment of marine NB 35-2 oilfield South, field results show polynary
Hot fluid handles up gas channeling phenomenon seriously, and hot water flooding can weaken gas channeling phenomenon.It is right both at home and abroad at present for above-mentioned two problems
Offshore Heavy Oil Field thermal recovery handle up it is follow-up turn to drive a development scheme not yet to conduct a research or study report less, carry out for this and handle up subsequently
Turn to drive development scheme research.
The content of the invention
In view of the above-mentioned problems, being applied to for offshore viscous oil field recovery ratio can be improved it is an object of the invention to provide a kind of
Offshore viscous oil field, which is handled up follow-up turn, drives the method developed.
To achieve the above object, the present invention uses following technical scheme：One kind is handled up subsequently suitable for offshore viscous oil field
The method for turning to drive exploitation, it is characterised in that：For oil viscosity between 350mPas and 1000mPas, use
Steam soak turns the development scheme of steam drive, specifically, and initial stage of development uses the development scheme of steam soak, follow-up then use
The development scheme that steam drives.
The optimal turn of drive opportunity that steam soak turns steam drive is when reservoir pressure drops to 4.0-5.0MPa.
Turn steam drive optimal injection parameter be：Production-injection ratio 1.3, bottom-hole steam quality 0.4,340 DEG C of implantation temperature, steam injection
Speed 240m3/d。
The present invention is due to taking above technical scheme, and it has advantages below：1st, the present invention is proposed suitable for marine thick
Oil field, which handle up, to be turned to drive turning drive mode, rationally turning drive opportunity and optimal injection parameter etc. for exploitation, overcomes current thermal recovery
The shortcomings of scheme steam soak round and platform device restricted lifetime, meet the requirement of the follow-up substituted technique of Offshore Heavy Oil Field thermal recovery.
2nd, the present invention provides important directive significance to the follow-up exploitation for turning to drive oil field at sea of handling up.
Brief description of the drawings
The difference that Fig. 1 is the present invention turns to drive the tired oil production of individual well and recovery percent of reserves curve under pressure；
Fig. 2 is the tired oil production of individual well and recovery percent of reserves curve under different production-injection ratios of the invention；
Fig. 3 is the tired oil production of individual well and recovery percent of reserves curve under different steam injecting temperatures of the invention；
Fig. 4 is that the different of the present invention inject the tired oil production of individual well under mass dryness fractions and recovery percent of reserves curve；Wherein, Fig. 4 (a) is not
Tire out oil production and recovery percent of reserves curve with individual well under injection mass dryness fraction；Fig. 4 (b) is Offshore Heavy Oil Field oil reservoir Simulation on whole pay zones wellbore heat loss
Manifold structural representation；Fig. 4 (c) is steam quality and well depth relation schematic diagram；
Fig. 5 is recovery percent of reserves schematic diagram under different development schemes of the invention；
Fig. 6 is temperature field schematic diagram under different development schemes of the invention；Wherein, Fig. 6 (a) is that steam soak turns steam drive
Temperature field schematic diagram under development scheme；Fig. 6 (b) be multielement hot fluid handle up turn multielement hot fluid drive development scheme under temperature
Field schematic diagram；Fig. 6 (c) is that multielement hot fluid is handled up the temperature field schematic diagram turned under hot water flooding's development scheme；Fig. 6 (d) is steam
Handle up the temperature field schematic diagram turned under hot water flooding's development scheme；
Fig. 7 is oil saturation profile schematic diagram under different development schemes of the invention；Wherein, Fig. 7 (a) is steam soak
Turn the oil saturation profile schematic diagram under steam drive development mode；Fig. 7 (b) be multielement hot fluid handle up turn multielement hot fluid drive
Oil saturation profile schematic diagram under development scheme；Fig. 7 (c) is that multielement hot fluid is handled up and turns containing under hot water flooding's development scheme
Oily saturation degree diagrammatic cross-section；Fig. 7 (d) is that steam soak turns oil saturation profile schematic diagram under hot water flooding's development scheme；
Fig. 8 is predicted the outcome under the different development schemes of the southern sand bodies of oil field 1064 of QHD33-1 of the present invention.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
The present invention proposes a kind of handled up follow-up turn suitable for offshore viscous oil field and drives the method developed, it is characterised in that：
For oil viscosity between 350mPas and 1000mPas, turn the development scheme of steam drive using steam soak,
Specifically, initial stage of development uses the development scheme of steam soak, development scheme that is follow-up then being driven using steam.
In above-described embodiment, the optimal turn of drive opportunity that steam soak turns steam drive is when reservoir pressure drops to 4.0-
During 5.0MPa (as shown in Figure 1).
In above-described embodiment, the optimal injection parameter for turning steam drive is：Production-injection ratio 1.3, bottom-hole steam quality 0.4, injection
340 DEG C of temperature, steam injection rate 240m3/ d (as shown in figs. 2 to 4).
Fig. 5~7 give recovery percent of reserves under different development schemes, temperature field, oil saturation.Found by contrasting,
Steam soak turns vapour driving oil recovery and goes out degree highest, and development effectiveness is best.Recommend steam soak to turn steam to drive as Offshore Heavy Oil Field oil
Field, which is handled up follow-up turn, drives the method developed.
The method developed is driven in proposed by the invention being handled up follow-up turn suitable for offshore viscous oil field, it is adaptable to not yet developed
Oil reservoir carry out secondary oil recovery exploitation, and the oil reservoir after being developed to steam soak further exploitation to improve recovery ratio.
Below with the oil deposit parameter in a specific oil field, the technique effect of the present invention is entered using the method for numerical simulation
Row checking：
Wherein, verification process is：
1) fine reservoir numerical simulation model is set up using Petrel softwares, CMG software STARS modules；
2) by mechanism model, the sensitivity analysis for turning drive opportunity and injection parameter under different development schemes is made, is provided
Handle up follow-up turn and drive optimal turn of drive opportunity and injection parameter；
3) by step 2) striked by turn to drive note and adopt parameter input to the model in 1), predict and production tired out under different development schemes
Oil mass and recovery percent of reserves.
Case study on implementation：Difference, which is handled up follow-up turn, drives development effectiveness contrast
By taking the southern sand bodies of oil field 1064 of Qinhuangdao 33-1 as an example, oil deposit parameter is shown in Table 1, steam soak is turned respectively steam drive,
Hot water flooding, multielement hot fluid, which is handled up, turns numerical Simulation Prediction under multielement hot fluid drive, the different development schemes of hot water flooding's progress, different
Development scheme Imitating result is as shown in table 2.Numerical simulation result shows, turns the tired oil production of steam drive using steam soak, adopts
Go out degree highest, development effectiveness is best.
The Qinhuangdao 33-1 of table 1 south oil field 1064 sand body oil deposit parameter table
Numerical simulation result is contrasted under the different development schemes of the Qinhuangdao 33-1 of table 2 south oil field 1064 sand body
The various embodiments described above are merely to illustrate the present invention, and wherein implementation steps of method etc. can be all varied from,
Every equivalents carried out on the basis of technical solution of the present invention and improvement, should not be excluded in protection scope of the present invention
Outside.
Claims (3)
1. a kind of handled up follow-up turn suitable for offshore viscous oil field drives the method developed, it is characterised in that：It is viscous for in-place oil
Degree turns the development scheme of steam drive using steam soak between 350mPas and 1000mPas, specifically, and exploitation is just
Phase uses the development scheme of steam soak, development scheme that is follow-up then being driven using steam.
2. a kind of method of follow-up turn of drive exploitation of being handled up suitable for offshore viscous oil field as claimed in claim 1, its feature exists
In：The optimal turn of drive opportunity that steam soak turns steam drive is when reservoir pressure drops to 4.0-5.0MPa.
3. a kind of method of follow-up turn of drive exploitation of being handled up suitable for offshore viscous oil field as claimed in claim 1 or 2, its feature
It is：Turn steam drive optimal injection parameter be：Production-injection ratio 1.3, bottom-hole steam quality 0.4,340 DEG C of implantation temperature, steam injection speed
Spend 240m3/d。
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| CN201710623955.6A CN107201891A (en) | 2017-07-27 | 2017-07-27 | A kind of handled up follow-up turn suitable for offshore viscous oil field drives the method developed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412412A (en) * | 2020-12-10 | 2021-02-26 | 中国石油天然气股份有限公司 | Method and device for determining starting conditions of ultra-thick oil steam drive-rotation drive |
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| CN101139923A (en) * | 2007-10-17 | 2008-03-12 | 中国石油天然气股份有限公司 | Method for developing deep-layer heavy crude reservoir by carbon dioxide auxiliary steam driving |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412412A (en) * | 2020-12-10 | 2021-02-26 | 中国石油天然气股份有限公司 | Method and device for determining starting conditions of ultra-thick oil steam drive-rotation drive |
| CN112412412B (en) * | 2020-12-10 | 2022-10-04 | 中国石油天然气股份有限公司 | Method and device for determining starting conditions of ultra-thick oil steam drive-rotation drive |
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| CB02 | Change of applicant information |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: CNOOC research institute limited liability company Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Research Institute |
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Application publication date: 20170926 |
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