CN107313760A - The method that layer steam injection improves development result of heavy oil reservoirs - Google Patents
The method that layer steam injection improves development result of heavy oil reservoirs Download PDFInfo
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- CN107313760A CN107313760A CN201610269609.8A CN201610269609A CN107313760A CN 107313760 A CN107313760 A CN 107313760A CN 201610269609 A CN201610269609 A CN 201610269609A CN 107313760 A CN107313760 A CN 107313760A
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- steam injection
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- heavy oil
- development result
- oil reservoirs
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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
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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
- E21B43/14—Obtaining from a multiple-zone well
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Abstract
The present invention, which provides a kind of layer steam injection, improves the method for development result of heavy oil reservoirs, and the method that the layer steam injection improves development result of heavy oil reservoirs includes：Step 1, the optimal well location for implementing layer steam injection is chosen；Step 2, the optimal oil layer section of layer steam injection is determined, and determines the number of plies of layer steam injection and the particular location of layer separating packer；Step 3, the steam injection amount of each layer is determined, the physical property characteristic of each layer is considered, effective thickness, using steam injection amount as optimized variable, sets up steam injection amount Optimized model；Step 4, design distributor eyelet realizes uniform steam injection；Step 5, according to each layer steam injection amount of calculating and the layer steam injection method determined, layer steam injection construction operation is carried out.The method that the layer steam injection improves development result of heavy oil reservoirs realizes the equilibrium producing of different layers position by calculating the different steam injection amounts of the different core intersection injection allocations of determination, so as to which the steam injection for expanding heavy crude reservoir involves scope, injection steam utilization is improved, and substantially improves development result of heavy oil reservoirs.
Description
Technical field
The present invention relates to oil field development technical field, especially relating to a kind of layer steam injection improves viscous crude
The method of effect of reservoir development.
Background technology
Heavy crude reservoir is restricted by itself reservoir conditions and technology, on stream, different layers
Position steam injection is uneven by imitating, and interlayer crude oil employs difference greatly, and steam injection development effectiveness is bad.
At present, steam injection development is still the major way of domestic Development of Viscous Crude Oil.Horizontal well steam injection,
The technologies such as single oil reservoir steam injection are maturation in Chinese development effect, and steam injection technology is advanced in the world.But, I
The general steam injection efficiency of state's heavy crude reservoir multi-section multi-layer is unsatisfactory, still suffers from interlayer crude oil and employs difference greatly,
The problem of steam injection development effectiveness is bad, the gas oil ratio of steam injection exploitation is up to 0.5, and minimum only 0.2,
Averagely it is about 0.4.How multi-section multi-layer general steam injection is improved, and it is always oil field development to improve steam injection efficiency
The problem of technical staff's research tackling key problem, in the urgent need to studying new method.For this, we have invented one kind
The method that new layer steam injection improves development result of heavy oil reservoirs, solves above technical problem.
The content of the invention
It is an object of the invention to provide a kind of method is simple, workable, effective practical layering note
The method that vapour improves development result of heavy oil reservoirs.
The purpose of the present invention can be achieved by the following technical measures：Layer steam injection improves heavy crude reservoir and opened
The method for sending out effect, the method that the layer steam injection improves development result of heavy oil reservoirs includes：Step 1,
Choose the optimal well location for implementing layer steam injection；Step 2, the optimal oil layer section of layer steam injection is determined, and
Determine the number of plies of layer steam injection and the particular location of layer separating packer；Step 3, the note of each layer is determined
Vapour amount, considers the physical property characteristic of each layer, and effective thickness, using steam injection amount as optimized variable, is set up
Steam injection amount Optimized model；Step 4, design distributor eyelet realizes uniform steam injection；Step 5, according to meter
Each layer steam injection amount calculated and the layer steam injection method determined, carry out layer steam injection construction operation.
The purpose of the present invention can be also achieved by the following technical measures：
In step 1, according to the location of this oil reservoir, construction feature, reservoir characteristic, remaining oil
Rich region and current well pattern, in conjunction with the hole condition condition of each well, choose and implement layering note
The optimal well location of vapour.
In step 2, according to the creation data of the thickness, physical property characteristic and early stage of reservoir, it is determined that
The optimal oil layer section of layer steam injection, according to the connection situation between each oil reservoir, thickness of interlayer, it is determined that layering
The number of plies of steam injection and the particular location of layer separating packer.
In step 3, the steam injection amount Optimized model of foundation is as follows：
Q=h × d × a × t
Wherein, Q is steam injection amount, m3；
H is effective pay thickiness, m；
D is the number of days of steam injection, d；
A is the control area of steam injection well, ha；
T is steam injection intensity, m3/(d·ha·m)。
In step 4, by designing distributor drainage area, i.e. eyelet number flows through to adjust steam
The choke pressure drop of distributor, and then the outer steam injection pressure of control pipe so that the heat injection amount of each distributor reaches
It is balanced.
Step 5 includes following steps：1. lower leaf steam injection technology tubing string；2. sleeve pipe annular is cut open
Steel plate；3. a full set of steam injection well head is installed and ground steam injection pipeline is connected；4. enter by the steam injection parameter of design
The uniform steam injection of row layering；5. well head installs heatproof pressure gauge and carries out stewing well after the completion of steam injection.
Layer steam injection in the present invention improves the method for development result of heavy oil reservoirs, is related to applied to oil
By layer steam injection process improving development result of heavy oil reservoirs in recovery process, difference is determined by calculating
Core intersection injection allocation difference steam injection amount come realize different layers position equilibrium producing, so as to expand heavy crude reservoir
Steam injection involve scope, improve injection steam utilization, and substantially improve development result of heavy oil reservoirs.
Case verification result shows：The present invention can fill up " in Development of Viscous Crude Oil, steam injection is uneven, layer position by
Effect is uneven " blank, and with method it is simple, workable, it is effective practical the features such as.
Brief description of the drawings
Fig. 1 improves a specific implementation of the method for development result of heavy oil reservoirs for the layer steam injection of the present invention
The flow chart of example.
Embodiment
It is cited below particularly to enable the above and other objects, features and advantages of the present invention to become apparent
Go out preferred embodiment, and coordinate shown in accompanying drawing, be described in detail below.
As shown in figure 1, Fig. 1 improves the method for development result of heavy oil reservoirs for the layer steam injection of the present invention
Flow chart.
Step 101：It is rich according to the location of this oil reservoir, construction feature, reservoir characteristic, remaining oil
Collect region and current well pattern, in conjunction with the hole condition condition of each well, choose and implement layer steam injection
Optimal well location.
Step 102：According to the creation data of the thickness, physical property characteristic and early stage of reservoir, it is determined that point
The optimal oil layer section of layer steam injection, according to the connection situation between each oil reservoir, thickness of interlayer, it is determined that layering note
The number of plies of vapour and the particular location of layer separating packer.
Step 103：The steam injection amount of each layer is determined, the physical property characteristic of each layer is considered, effective thickness,
Using steam injection amount as optimized variable, you can set up steam injection amount Optimized model as follows：
Q=h × d × a × t
Wherein, Q is steam injection amount, m3；
H is effective pay thickiness, m；
D is the number of days of steam injection, d；
A is the control area of steam injection well, ha；
T is steam injection intensity, m3/(d·ha·m)；
Step 104：The method for realizing uniform steam injection, it is to pass through to be layered uniform steam injection technology profile control principle
Design distributor drainage area (eyelet number) to adjust the choke pressure drop that steam flows through distributor, enter
And the outer steam injection pressure of control pipe so that the heat injection amount of each distributor reaches equilibrium.
Step 105：According to each layer steam injection amount of calculating and the layer steam injection method determined, it is layered
Steam injection construction operation.Mainly include following steps：1. lower leaf steam injection technology tubing string；2. cut open
Sleeve pipe doughnut-shaped steel plate；3. a full set of steam injection well head is installed and ground steam injection pipeline is connected；4. by the note of design
Vapour parameter carries out being layered uniform steam injection；5. well head installs heatproof pressure gauge and carries out stewing well after the completion of steam injection.
It is the instantiation of the application present invention below.
Step one：Choose the optimal well location for implementing layer steam injection.
It is stained with oblique 63 well locations of 29- and is stained with 29 pieces in Taiping oilfield, the original viscosity of the block is high, and recovery percent of reserves is low,
Remaining oil enrichment, is stained with the 29- oblique 63 well history new brought in wells of 2015, and hole condition in order, therefore is selected
The well is taken to carry out heat extraction by steam injection.
Step 2：Determine the number of plies of layer steam injection and the particular location of packer.
Be stained with oblique 63 wells of 29- and bore and met two layers of 1 substratum and 2 substratums under Guantao, between two perforations layer every
Layer is 25 meters, because interlayer gap is big, is uniformly employed to realize, point two layers of note is implemented to the well
Vapour, layer separating packer design avoids casing coupling, is finally scheduled on 1170 meters between two perforations layer
Position.
Table 1TPZ29-X63 reservoir parameter tables
Step 3：Calculate the steam injection amount of each layer
It is as follows according to the steam injection amount that above-mentioned calculation formula Q=h*d*a*t calculating obtains each layer,
Q1=h*d*a*t=5*6.3*12.7*3=1200m3
Q2=h*d*a*t=3*4.2*12.7*5=800m3
Table 2TPZ29-X63 layer steam injection design parameter tables
Step 4：Realize uniform steam injection
The choke pressure drop that steam flows through distributor is adjusted by designing the eyelet number of distributor, and then
The outer steam injection pressure of control pipe so that the heat injection amount of each distributor reaches equilibrium.Finally it is set to upper strata injection allocation
9 eyelets of device, 6 eyelets of lower floor's distributor.
Step 5：According to each layer steam injection amount of calculating and the layer steam injection method determined, layering note is carried out
Vapour construction operation.
1st, lower leaf steam injection string
Lower steam injection string：Plug+Φ 60.3mm washing pipe pipe nipple 2m+ Φ 60.3mm steam injection screen casing 1.0m+ Φ
60.3mm washing pipes 10.98m+ chemistry heat-sensitive packer 0.5m+ Φ 60.3mm washing pipe 16.64m+ sliding sleeve injection allocations
Device 0.5m+ Φ 60.3mm washing pipes 32.94m+41/2in×27/8In high vacuum insulations pipe (chamfering) 240m+
Thermal recovery compensator+41/2in×27/8In high vacuum insulation pipe 884.44m are to well head.
Steam injection well head is using the extraordinary thermal production well mouth of high pressure, it is adaptable to subcritical pressure boiler steam injection.Well head
Heatproof, resistance to force feed, each one piece of casing pressure table are installed, it is desirable to which testing pressure of well head 25MPa, 3min, which is not pierced, not to be leaked
To be qualified.
2nd, doughnut-shaped steel plate is cut open
Note：(1) carried out when cutting doughnut-shaped steel plate by corresponding working specification, with good fire extinguisher, accomplish peace
Full construction.
Production string is protected, forbids to cause production string to destroy.
3rd, ground steam injection pipeline is connected.
First to steam injection pipeline pipeline purging, secondly testing pressure of well head 25MPa, 3min, which are not pierced, does not leak to be qualified.
Ground steam injection pipeline and well head are incubated.
4. steam injection
(1) bottom oil layer steam injection：
By the steam injection parameter of design to bottom oil layer steam injection 800m3.Steam injection process notes recording steam injection pressure
Power changes, to adjust steam injection parameter according to pressure in time.
(2) top oil reservoir steam injection：
Instlated tubular pitching, suppresses opening sliding sleeve distributor, and top oil reservoir is noted by the steam injection parameter of design
Vapour 1200m3.Steam injection process notes record steam injection pressure change, to adjust steam injection according to pressure in time
Parameter.
5th, well is boiled in a covered pot over a slow fire
After the completion of steam injection, well head installs heatproof pressure gauge, boils in a covered pot over a slow fire well 2-4 days, is adjusted according to actual conditions
The stewing well time.
6th, open flow
Use oil nozzle open flow.Open flow initial stage was with 3-10mm oil nozzles open flow (changing oil nozzle successively), first day
Liquid output is controlled in 15m3Within/d, Liquid output control is in 20m within second day3Within/d, later Liquid output
Control is in 30m3Within/d, finally remove oil nozzle.Turn to take out during open-flow to atmospheric pressure.It is required that in open flow
Stage measures per 8h and once produces liquid sand content.
Construction effect：
The well implements layer steam injection, and construction is performed in strict accordance with design parameter, day oil-producing 6.5 after operation
Ton, year, the tired oil that increases was reachable 1208 tons, and development effectiveness is obvious.
Claims (6)
1. the method that layer steam injection improves development result of heavy oil reservoirs, it is characterised in that the layering is noted
The method that vapour improves development result of heavy oil reservoirs includes：
Step 1, the optimal well location for implementing layer steam injection is chosen；
Step 2, the optimal oil layer section of layer steam injection is determined, and determines the number of plies of layer steam injection and divides
The particular location of layer packer；
Step 3, the steam injection amount of each layer is determined, the physical property characteristic of each layer is considered, effective thickness,
Using steam injection amount as optimized variable, steam injection amount Optimized model is set up；
Step 4, design distributor eyelet realizes uniform steam injection；
Step 5, according to each layer steam injection amount of calculating and the layer steam injection method determined, layering note is carried out
Vapour construction operation.
2. the method that layer steam injection according to claim 1 improves development result of heavy oil reservoirs, its
Be characterised by, in step 1, according to the location of this oil reservoir, construction feature, reservoir characteristic,
Remaining oil enrichment region and current well pattern, in conjunction with the hole condition condition of each well, choose and implement
The optimal well location of layer steam injection.
3. the method that layer steam injection according to claim 1 improves development result of heavy oil reservoirs, its
It is characterised by, in step 2, according to the creation data of the thickness, physical property characteristic and early stage of reservoir,
The optimal oil layer section of layer steam injection is determined, according to the connection situation between each oil reservoir, thickness of interlayer, it is determined that
The number of plies of layer steam injection and the particular location of layer separating packer.
4. the method that layer steam injection according to claim 1 improves development result of heavy oil reservoirs, its
It is characterised by, in step 3, the steam injection amount Optimized model of foundation is as follows：
Q=h × d × a × t
Wherein, Q is steam injection amount, m3；
H is effective pay thickiness, m；
D is the number of days of steam injection, d；
A is the control area of steam injection well, ha；
T is steam injection intensity, m3/(d·ha·m)。
5. the method that layer steam injection according to claim 1 improves development result of heavy oil reservoirs, its
It is characterised by, in step 4, steaming is adjusted by designing distributor drainage area, i.e. eyelet number
Choke pressure drop of the steam flow through distributor, and then the outer steam injection pressure of control pipe so that the heat injection of each distributor
Amount reaches equilibrium.
6. the method that layer steam injection according to claim 1 improves development result of heavy oil reservoirs, its
It is characterised by, step 5 includes following steps：1. lower leaf steam injection technology tubing string；2. set is cut open
Pipe doughnut-shaped steel plate；3. a full set of steam injection well head is installed and ground steam injection pipeline is connected；4. by the steam injection of design
Parameter carries out being layered uniform steam injection；5. well head installs heatproof pressure gauge and carries out stewing well after the completion of steam injection.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608023A (en) * | 2018-06-15 | 2019-12-24 | 中国石油化工股份有限公司 | Adaptability boundary analysis and evaluation method for stratified steam injection of thickened oil |
| CN110952967A (en) * | 2018-09-27 | 2020-04-03 | 中国石油天然气股份有限公司 | Thickened oil recovery method |
| CN111648751A (en) * | 2020-06-02 | 2020-09-11 | 中国石油化工股份有限公司 | Ultrahigh-rotation huff and puff later-stage multilayer heavy oil reservoir development method |
| CN115247543A (en) * | 2021-04-28 | 2022-10-28 | 中国石油化工股份有限公司 | Method for accurately injecting steam in fixed-point segmented water shutoff and dislocation mode of heavy oil reservoir horizontal well |
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| CN101892827A (en) * | 2010-04-30 | 2010-11-24 | 钟立国 | Optimized steam injection technology for horizontal well in segments |
| CN102108851A (en) * | 2010-12-30 | 2011-06-29 | 中国石油天然气股份有限公司 | Horizontal well steam injection method and system |
| CN104879167A (en) * | 2015-04-27 | 2015-09-02 | 中国石油天然气股份有限公司 | Method for rebuilding gas storage reservoir and layered injection and recovery system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101892827A (en) * | 2010-04-30 | 2010-11-24 | 钟立国 | Optimized steam injection technology for horizontal well in segments |
| CN102108851A (en) * | 2010-12-30 | 2011-06-29 | 中国石油天然气股份有限公司 | Horizontal well steam injection method and system |
| CN104879167A (en) * | 2015-04-27 | 2015-09-02 | 中国石油天然气股份有限公司 | Method for rebuilding gas storage reservoir and layered injection and recovery system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608023A (en) * | 2018-06-15 | 2019-12-24 | 中国石油化工股份有限公司 | Adaptability boundary analysis and evaluation method for stratified steam injection of thickened oil |
| CN110608023B (en) * | 2018-06-15 | 2021-12-10 | 中国石油化工股份有限公司 | Adaptability boundary analysis and evaluation method for stratified steam injection of thickened oil |
| CN110952967A (en) * | 2018-09-27 | 2020-04-03 | 中国石油天然气股份有限公司 | Thickened oil recovery method |
| CN111648751A (en) * | 2020-06-02 | 2020-09-11 | 中国石油化工股份有限公司 | Ultrahigh-rotation huff and puff later-stage multilayer heavy oil reservoir development method |
| CN115247543A (en) * | 2021-04-28 | 2022-10-28 | 中国石油化工股份有限公司 | Method for accurately injecting steam in fixed-point segmented water shutoff and dislocation mode of heavy oil reservoir horizontal well |
| CN115247543B (en) * | 2021-04-28 | 2024-04-09 | 中国石油化工股份有限公司 | Fixed-point segmented water shutoff and dislocation accurate steam injection method for horizontal well of heavy oil reservoir |
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