CN107725038A - It is a kind of to test seal-off effect chemical profile control agent and migrated in oil reservoir the method for depth - Google Patents
It is a kind of to test seal-off effect chemical profile control agent and migrated in oil reservoir the method for depth Download PDFInfo
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- CN107725038A CN107725038A CN201710816850.2A CN201710816850A CN107725038A CN 107725038 A CN107725038 A CN 107725038A CN 201710816850 A CN201710816850 A CN 201710816850A CN 107725038 A CN107725038 A CN 107725038A
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- 230000000694 effects Effects 0.000 title claims abstract description 39
- 239000000126 substance Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012360 testing method Methods 0.000 title claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 52
- 239000011435 rock Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000013508 migration Methods 0.000 claims abstract description 23
- 230000005012 migration Effects 0.000 claims abstract description 23
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 239000000243 solution Substances 0.000 claims abstract description 12
- 230000001419 dependent effect Effects 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000013043 chemical agent Substances 0.000 description 7
- 230000035699 permeability Effects 0.000 description 7
- 239000011148 porous material Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 4
- 241001044369 Amphion Species 0.000 description 3
- 238000013480 data collection Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/117—Detecting leaks, e.g. from tubing, by pressure testing
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A kind of method for depth of being migrated the invention provides test seal-off effect chemical profile control agent in oil reservoir.This method comprises the following steps：By rock core vacuumizing, saturation stratum water；First time water drive is carried out to the rock core, until water-flooding pressure is stable, water-flooding pressure now is designated as incipient stability pressure；Seal-off effect chemical profile control agent to be tested is configured to inject in the rock core after solution, until injection pressure stability；Second of water drive is carried out to the rock core, until water-flooding pressure is stable, then obtains the pressure on the rock core at each pressure tap respectively, and each pressure tap is to the distance of the injection end of the rock core；The functional relation between the pressure and the distance is built, migration depth of the seal-off effect chemical profile control agent in rock core is obtained according to the functional relation.The position that technical scheme provided by the invention can be involved with accurate judgement chemical profile control agent, corresponding foundation is provided for the design of construction technology, compensate for the blank of indented material.
Description
Technical field
A kind of method for depth of being migrated the present invention relates to test seal-off effect chemical profile control agent in oil reservoir, belongs to seal-off effect
Learn profile control agent evaluation field.
Background technology
With going deep into for oil field development, the development difficulty of Chinese continental oil fields raises year by year, and high-permeability pay water outlet is serious,
Low permeability pay productive potentialities are difficult to play.Long-term high intensity water filling, which causes to form channelling in the high permeability zone of oil reservoir, leads to
Road, injection water are directly entered producing well along fluid-channeling channel, form inefficient cycle, and moisture content rises, and yield declines, near wellbore zone
Residual oil saturation it is very low.
In view of the foregoing, the method generally used at present is that research and development of going into overdrive can enter oil deposit deep part, improves note
Enter the chemical agent that water flow direction expands oil deposit deep part sweep efficiency, but to those skilled in the art, how to test
Migration depth of this kind of chemical agent inside oil reservoir turns into the most important thing for needing solve.
Therefore it provides a kind of method for being capable of migration depth of the Validity Test seal-off effect chemical profile control agent inside oil reservoir into
For this area technical problem urgently to be resolved hurrily.
The content of the invention
In order to solve the above technical problems, it is an object of the invention to provide one kind test seal-off effect chemical profile control agent in oil reservoir
The method of middle migration depth, this method can determine seepage flow depth of the chemical profile control agent in pore media, so as to effective evaluation
The deep migration effect of closure chemical agent.
To reach above-mentioned purpose, the invention provides a kind of test seal-off effect chemical profile control agent to migrate depth in oil reservoir
Method, it comprises the following steps：
By rock core vacuumizing, saturation stratum water；
First time water drive is carried out to the rock core, until water-flooding pressure is stable, water-flooding pressure now is designated as incipient stability
Pressure；
Seal-off effect chemical profile control agent to be tested is configured to inject in the rock core after solution, until injection pressure is steady
It is fixed；Wherein, when seal-off effect chemical profile control agent to be tested being configured into solution, the concentration of the solution is not particularly limited,
The concentration that the profile control agent being typically different prepares obtained solution differs；
Second of water drive is carried out to the rock core, until water-flooding pressure is stable, then obtains and is respectively surveyed on the rock core respectively
Pressure at pressure point, and each pressure tap is to the distance of the injection end of the rock core；
The functional relation between the pressure and the distance is built, the seal-off effect is obtained according to the functional relation
Learn migration depth of the profile control agent in the rock core.
Currently without the method for migration depth of the specific calculating profile control agent in oil reservoir, in general way is：Injection is adjusted
The pressure value of each pressure tap on record cast after agent is cutd open, when the pressure value of a point starts rise, is considered as profile control
Agent has migrated to this position.Present invention research is found：Concentration is change to chemical agent when seepage flow in pore media, i.e.,
Porch concentration highest, along flow direction, concentration gradually reduces, and the forward position concentration of profile control agent is close to zero, and pressure rise
When select be not profile control agent migration forward position, that is to say, that some point pressure rise explanation there is profile control agent to migrate to this position
Put, but at this moment already have certain concentration, and the forward position of profile control agent may move forward a certain distance, because
This above-mentioned in general way does not account for the change in concentration of profile control agent completely when judging position using pressure, it is impossible to accurately obtain
The position in forward position.
In technical scheme provided by the invention, seal-off effect chemical profile control agent is in migration process because Adsorption And Retention is made
With the concentration in pore media gradually reduces with constantly migrating forward, and the distance when concentration is reduced to 0 is exactly chemical agent
Migration distance.Therefore, the first time water drive that carries out, when water-flooding pressure stable corresponding pressure are injected before seal-off effect chemical profile control agent
Force value is exactly pressure value when chemical agent concentration is zero, the pressure value is substituted into the functional relation of structure, you can blocked
Distance when property chemical profile control agent concentration is zero, the migration distance of the distance as seal-off effect chemical profile control agent.
In the above-mentioned methods, the pressure measurement points on the rock core can be determined according to actual conditions, it is ensured that pressure tap
It is equally spaced.If pressure measurement points are n, model is divided into n+1 sections, and segment length is equal.
In the above-mentioned methods, the permeability of the rock core is not particularly limited, and can be any permeability；Preferably, institute
It is cubic shaped to state rock core, and its size is 4.5cm × 4.5cm × 100cm, but not limited to this.
In the above-mentioned methods, it is preferable that when carrying out second of water drive, in injection process, this method also includes painting respectively
The step of making the pressure history of each pressure tap on the rock core.
In the above-mentioned methods, it is preferable that when carrying out water drive, used water is stratum water；It is highly preferred that the stratum water
Salinity be 500ppm, but not limited to this.
In the above-mentioned methods, it is preferable that the functional relation built between the pressure and the distance includes procedure below：
Using the distance as independent variable, using the pressure as dependent variable, regression fit is carried out, you can obtain the pressure and the distance
Functional relation.
In the above-mentioned methods, it is preferable that the seal-off effect chemical profile control agent is obtained in the rock according to the functional relation
Migration depth in the heart includes procedure below：The steady pressure (is subjected to first time water drive, water-flooding pressure to the rock core
Pressure value when stable) substitute into the functional relation, you can the seal-off effect chemical profile control agent is obtained in the rock core
Migration depth.The migration depth of profile control agent is bigger, shows that the effect of increasing production of secondary water drive is better.
Beneficial effects of the present invention：
For prior art there is presently no the method for test migration depth, technical scheme provided by the invention can determine chemistry
The advanced position of profile control agent migration, therefore the position that can be involved with accurate judgement chemical profile control agent, are carried for the design of construction technology
For corresponding foundation, the blank of indented material compensate for.
Brief description of the drawings
Fig. 1 is that test seal-off effect chemical profile control agent is migrated the experimental provision of depth in oil reservoir；
Main Reference label declaration：
1：ISCO pumps；2：No.1 intermediate receptacle；3：No. two intermediate receptacles；4：Entrance；5：Core holding unit；6：Back-pressure valve；
7：Outlet；8：Produced Liquid automatic collector；9：Insulating box；10：Pressure automatic acquisition system.
Embodiment
In order to which technical characteristic, purpose and the beneficial effect of the present invention is more clearly understood, now to the skill of the present invention
Art scheme carry out it is described further below, but it is not intended that to the present invention can practical range restriction.
Following examples can pass through the oil reservoir migration depth experiments device (as shown in Figure 1) of existing seal-off effect chemical agent
Operated, but not limited to this, other can realize that the device of technical solution of the present invention is also feasible.Device shown in Fig. 1
Including：ISCO pumps 1, No.1 intermediate receptacle 2, No. two intermediate receptacles 3, entrance 4, core holding unit 5, back-pressure valve 6, outlet 7, extraction
Liquid automatic collector 8, insulating box 9 and pressure automatic acquisition system 10；Wherein, core holding unit 5 is placed in insulating box 9, rock core
One end of clamper 5 is provided with entrance 4, and the other end is provided with one end difference of outlet 7, No.1 intermediate receptacle 2 and No. two intermediate receptacles 3
It is connected with ISCO pumps 1, their other end is then connected with entrance 4 respectively, and back-pressure valve 6, Produced Liquid automatic data collection are provided with outlet 7
Instrument 8 can automatic data collection by the Produced Liquids of the outflow of outlet 7, pressure automatic acquisition system 10 is connected with core holding unit 5, and it can
Pressure value at each pressure tap of automatic data collection rock core, can contain stratum water in No.1 intermediate receptacle 2, in No. two intermediate receptacles 3
The seal-off effect chemical profile control agent solution prepared can be contained.
Embodiment 1
A kind of test amphion seal-off effect chemical profile control agent is present embodiments provided to migrate in 200mD oil reservoirs depth
Method.This method comprises the following steps：
1) make water and survey 1 piece of the rock core that permeability is 200md, the size of the rock core is 4.5 × 4.5 × 100cm
2) by seal-off effect chemical profile control agent to be tested, (the chemical profile control agent is amphiphilic polymers gel, the auspicious moral stone in Beijing
Oily New Tech S. R. L.'s production) it is configured to solution, concentration 3000ppm.
3) first time water drive is carried out：Under conditions of 60 DEG C, by rock core vacuumizing 8 hours, saturation stratum water, treat that rock core is complete
The pore volume (pore volume is 1PV) of rock core can be obtained after the water of full saturation stratum, continues to inject stratum water until pressure is steady
Fixed (pressure value is 0.02MPa, and water phase permeability can also be calculated according to pressure value now).
4) the above-mentioned seal-off effect chemical profile control agent solution prepared is injected to rock core, until injection pressure stability.
5) second of water drive is carried out：Stratum water is injected to rock core, until injection pressure stability, is now recorded on rock core respectively
The pressure value of each pressure tap, and each pressure tap is to the distance of rock core injection end.
6) using distance as independent variable, pressure value is the functional relation that dependent variable returns each point pressure value and distance：
LnP=ln1.828+ (- 0.0653) L
Wherein：P- pressure (MPa)；
L- pressure taps to rock core injection end distance (cm).
7) when will carry out first time water drive, pressure reaches corresponding pressure value 0.02MPa during stable state and substitutes into above-mentioned letter
In number relation, the distance 69.1cm being calculated is exactly distance when amphion seal-off effect chemical profile control agent concentration is 0, also
It is the migration distance of seal-off effect chemical profile control agent；
According to the method described above, the migration distance of different amphion seal-off effect chemical profile control agent can be tested respectively,
Embodiment 2
Present embodiments provide and a kind of test inorganic seal-off effect chemical profile control agent and migrated in 5000mD oil reservoirs the side of depth
Method.This method comprises the following steps：
1) make water and survey 1 piece of the rock core that permeability is 5000md, the size of the rock core is 4.5 × 4.5 × 30cm.
2) by seal-off effect chemical profile control agent to be tested, (the chemical profile control agent is OMGL, and the auspicious moral oil new technology in Beijing is public
Department's production) it is configured to solution, concentration 3000ppm.
3) first time water drive is carried out：Under conditions of 60 DEG C, by rock core vacuumizing 8 hours, saturation stratum water, treat that rock core is complete
The pore volume (pore volume is 1PV) of rock core is obtained after the water of full saturation stratum, continues to inject stratum water to pressure stability.
4) the above-mentioned inorganic seal-off effect chemical profile control agent solution prepared is injected to rock core, until injection pressure stability.
5) second of water drive is carried out：Turn on pump injects stratum water, is driven to injection pressure stability, after record injects pressure stability,
The pressure value of each pressure tap of rock core, and each pressure tap is to the distance of rock core injection end.
6) using distance as independent variable, pressure value is the functional relation that dependent variable returns each point pressure value and distance：
P=0.8501e-0.0707L
Wherein：P is pressure (MPa)
L is distance (cm) of the pressure tap to rock core injection end.
7) when by first time water drive, pressure value 0.02MPa when pressure reaches stable state substitutes into function, is calculated
Distance 53cm is exactly distance when inorganic seal-off effect chemical profile control agent concentration is 0, that is, the migration of seal-off effect chemical profile control agent
Distance.
Claims (6)
- A kind of method of depth 1. test seal-off effect chemical profile control agent is migrated in oil reservoir, it comprises the following steps：By rock core vacuumizing, saturation stratum water；First time water drive is carried out to the rock core, until water-flooding pressure is stable, water-flooding pressure now is designated as incipient stability pressure；Seal-off effect chemical profile control agent to be tested is configured to inject in the rock core after solution, until injection pressure stability；Second of water drive is carried out to the rock core, until water-flooding pressure is stable, then obtains each pressure tap on the rock core respectively The pressure at place, and each pressure tap is to the distance of the injection end of the rock core；The functional relation between the pressure and the distance is built, obtaining the seal-off effect chemistry according to the functional relation adjusts Cut open migration depth of the agent in the rock core.
- 2. according to the method for claim 1, wherein, the size of the rock core is 4.5cm × 4.5cm × 100cm.
- 3. according to the method for claim 1, wherein, when carrying out water drive, used water is stratum water.
- 4. the method according to claim 1 or 3, wherein, the salinity of the stratum water is 500ppm.
- 5. according to the method for claim 1, wherein, build functional relation between the pressure and the distance include with Lower process：Using the distance as independent variable, the pressure is dependent variable, carries out regression fit, obtains the pressure and the distance Functional relation.
- 6. according to the method for claim 1, wherein, the seal-off effect chemical profile control agent is obtained according to the functional relation and existed Migration depth in the rock core includes procedure below：The incipient stability pressure is substituted into the functional relation, you can obtain the seal-off effect chemical profile control agent in the rock core In migration depth.
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| CN201710816850.2A CN107725038B (en) | 2017-09-12 | 2017-09-12 | Method for testing migration depth of plugging chemical profile control agent in oil reservoir |
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| CN201710816850.2A CN107725038B (en) | 2017-09-12 | 2017-09-12 | Method for testing migration depth of plugging chemical profile control agent in oil reservoir |
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Cited By (2)
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| CN110927026A (en) * | 2019-12-26 | 2020-03-27 | 东北石油大学 | Simulation method for evaluating deep migration characteristic of polymer microsphere in porous medium |
| CN112362538A (en) * | 2020-12-08 | 2021-02-12 | 中国石油天然气集团有限公司 | Method for acquiring penetration depth of surfactant into rock |
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