CN105804713B - A kind of quick method for determining each substratum well head water filling of water injection well and starting pressure - Google Patents
A kind of quick method for determining each substratum well head water filling of water injection well and starting pressure Download PDFInfo
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- CN105804713B CN105804713B CN201610199788.2A CN201610199788A CN105804713B CN 105804713 B CN105804713 B CN 105804713B CN 201610199788 A CN201610199788 A CN 201610199788A CN 105804713 B CN105804713 B CN 105804713B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 134
- 238000002347 injection Methods 0.000 title claims abstract description 92
- 239000007924 injection Substances 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000012360 testing method Methods 0.000 claims abstract description 57
- 238000010521 absorption reaction Methods 0.000 claims abstract description 8
- 230000009102 absorption Effects 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 230000002459 sustained effect Effects 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 18
- 239000010410 layer Substances 0.000 description 13
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003027 oil sand Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
-
- 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
- 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
- E21B43/20—Displacing by water
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to oil field development maintenance technology field, more particularly to a kind of quick method for determining each substratum well head water filling of water injection well and starting pressure.The method of the present invention, mainly each substratum is obtained in two not injection flows on the same day using the explanation results of each substratum of water injection well intake profile test twice, day water absorption under difference injection pressure, it is respectively horizontal mark with day water absorption for each substratum, well head water injection pressure value makees coordinate described point to be vertical, then retouched coordinate points twice are connected into the water injection indication curve that life is the substratum in line, the intercept formed after the water injection indication curve extension with the intersection point of ordinate is that the well head water filling of the substratum starts pressure.The explanation results that the method for the present invention need to only test by intake profile twice carry out simple data processing and described point line drawing, it can determine that the well head of each substratum starts pressure, it is strong adaptability, simple to operate, less investment, and can accurately measure thin interbed, different depth each substratum water filling well head start pressure.
Description
Technical field
The present invention relates to oil field development maintenance technology field, more particularly to a kind of quick determination water injection well substratum starts pressure
Method.
Background technology
In oilfield development process, with the passage of oil field development time, formation pressure is gradually reduced, long-term steady in order to realize
Fixed exploitation keeps the pressure of oil reservoir, it is necessary to give stratum supplement energy.Method main at present is to keep oil reservoir pressure using water filling
Power.Therefore, a collection of water injection well is also bored in addition to boring a collection of producing well in oil field development.Underground oil reservoir is given by water injection well
Water filling, formation pressure is maintained oil well output is kept stable.In order to understand each oil reservoir water swelling elastomer of water injection well, it is necessary to survey and inhale
Water section, understand the absolute injection rate of each substratum.For same water injection well, because multiple Development layer series be present in subsurface reservoir, and
And the difference of the physical property such as reservoir rockses, fluid, during causing waterflooding extraction, it is different into each substratum difficulty or ease to there is injection water
Situation.Particularly to hypotonic, ultralow permeable reservoir, reservoir porous hole is narrow, and the only several microns of radius are shouted in hole so that this portion
Reserves are divided to be difficult to effectively employ, generally only when water injection pressure meets or exceeds a certain critical value, the fluid in porous media
It can just start to flow, it is to make pressure when fluid starts to flow in porous media to start pressure.At present, most of water controlled field
Into mid-later development phase, Reservoir Heterogeneity getting worse, it is necessary to corresponding well stimulation is taken, and its successful basis is the palm
Hold each substratum immediately, accurately start pressure, in order to oil field development personnel arrange oil field, well group, individual well development plan, have
Targetedly carry out measure, improve the production efficiency and water drive swept volume of each interlayer, and finally improve oil recovery factor.
At present, the method for starting pressure test to reservoir mainly has three classes：First method is laboratory experiment method, including list
The measure of phase and two-phase starting pressure gradient, because rock core used and stratum truth difference are larger, the result of test is more existing
Field difference is also very big；Second method is downhole testing method, including oxygen activation logging, layered pulling and running test etc., is primarily present work
Industry often, the problems such as fund input is big, and the testing time is long, and can not being tested for alternate thin beds reservoir, high angle hole；3rd
Kind method is the mathematical computations based on experimental data, and result of calculation is artificially adjusted by mathematical modeling and variable to be influenceed very
Greatly, resultant error is big.
The content of the invention
The present invention starts the deficiency of pressure method for measuring each layer of water injection well in the prior art, there is provided a kind of simple to operate
The method that each substratum well head water filling of easy quick determination water injection well starts pressure.
The object of the present invention is achieved like this, a kind of quick side for determining each substratum well head water filling of water injection well and starting pressure
Method, including following process：1）Pressure gauge and water injection manifold scale that wellhead of water injection well to be measured connects with water pump are calibrated, is checked and true
Guarantee in profile-log of water injection to be measured test instrument, oil pipe it is normal；2）According to the well depth of each substratum of water injection well to be measured, will use
The well depth position of instrument, each substratum of oil pipe tripping in the intake profile test for detecting each substratum, into well with Q1 day water filling
The intake profile that flow water injection carries out each substratum is tested, and after the pressure value stabilization for observing well head pressure gauge, records the pressure gauge
Well head water injection pressure when pressure value P 1 is Q1 injection flows, then stop water filling, take out downhole testing tool string, record
The explanation results of the intake profile test of each substratum, while recover daily water filling to the water injection well and work； 3）Absorbed water away from last time
After section plane test terminates and recovers normal daily water filling work 8-10 hours, second of water suction is carried out to water injection well to be measured and is cutd open
Face is tested, during test, day injection flow be Q2, after the pressure value stabilization of well head pressure gauge, record the pressure value of the pressure gauge
Well head water injection pressure when P2 is Q2 injection flows, then stop water filling, take out testing tool string, record each substratum again
The explanation results of intake profile test；4）The explanation results tested according to intake profile twice, obtain each substratum at two not
Injection flow on the same day, the day water absorptions under difference injection pressure, are respectively abscissa with day water absorption for each substratum, well head
Water injection pressure value is ordinate described point, and retouched coordinate points twice then are connected into the raw as water filling instruction of the substratum in line
Curve, the intercept formed after the water injection indication curve extension with the intersection point of ordinate are that the well head water filling of the substratum starts pressure
Power.
In the present invention, flow and the well intake pressure of absorbing water the day in each substratum twice intake profile test data are utilized
Linear relationship, the startup pressure of each substratum can be easily determined by simple work mark described point line of sitting.Due to intake profile
Test and daily monitoring means is managed for oil-water well, the explanation results that method of the invention need to only test by intake profile twice
Carry out simple data processing and described point line drawing, you can determine that the well head of each substratum starts pressure, it is not necessary to which test in addition is set
Standby and test program, strong adaptability, simple to operate, less investment, and it is different deep accurately to measure alternate thin beds reservoir, high angle hole
The well head water filling of each substratum of degree starts pressure, and other pollution will not be caused to stratum.
Further accurately to measure the startup pressure of each substratum in daily water filling, the step 2）During middle intake profile test
Day injection flow when working of the daily water filling of day injection flow Q1 and water injection well to be measured it is identical.Using identical with daily water filling
Day injection flow carry out intake profile test, the water suction situation of each substratum in daily water filling can be accurately measured, if Q1 takes
It is worth too small, the low-permeability layer of meeting test leakage fine pore, if Q1 values are excessive, additionally can measures the high compacted zone that can not be recovered the oil more,
Cause resource wasting.
To ensure accurately to describe the water injection indication curve of each substratum, the step 3）In second of intake profile test when
Day injection flow Q2=（1.5—2）Q1.
To be further ensured that the accuracy of second of intake profile measurement result, the step 3）In second of intake profile
Day injection flow before test starts during daily water filling is Q2, and sustained water injection 5-8 hours.Before carrying out intake profile test, in advance
When first to test day injection flow to each substratum water filling, when can shorten intake profile test well head water injection pressure it is stable when
Between, shorten the testing time, reduce test injection rate.
Brief description of the drawings
Fig. 1 is the W5- for the method progress for starting pressure using each substratum well head water filling of quick determination water injection well of the present invention
18 wells produce the water injection indication curve of layer.
Embodiment
The present embodiment show the oil-sand of the well with certain oil field W5-18 well locations in W5 blocks northeast structural high part, table 1
Volume data form, at present 2 series of strata of the well point exploitation, wherein Ef2 3Mean permeability is 96.1 × 10-3μm2, average pore is
21.3%,.Ef1 1Mean permeability is 191.7 × 10-3μm2, average pore 23.5%, there are middle high poroperm characteristics, belong to shallow
Layer multi-layer shape common heavy oil reservoir.Oil reservoir buried depth is 53.5 DEG C in 1000~1080m, formation temperature, and strata pressure is
9.72MPa, reset pressure coefficient is close to 1.0.This layer of water injection pressure is relatively low, and intake profile shows that the performance of water filling interlayer contradiction is prominent
Go out, reservoir properties condition is preferable, and well pattern condition is more perfect, and recovery percent of reserves is relatively low, remaining Chuck Steak.The Ef of the well2 3Layer and Ef1 1
The 5th layer of layer, 11th layer oil reservoir it is partially dry, do not penetrate out during oil recovery, so the present embodiment only carries out the 6-10th layer of test.
Table 1
The method that each substratum well head water filling of quick determination water injection well in the present embodiment starts pressure, including following process：
1）Pressure gauge and water injection manifold scale that wellhead of water injection well to be measured connects with water pump are calibrated, checks and ensures that being used for water injection well to be measured inhales
Instrument, the pipe of water section plane test are normal；2）According to table 1, this mainly tests five substratums of 6-10 layers of substratum serial number
Well head water filling start pressure, according to the well depth for treating each substratum in side, by the well depth of each substratum of instrument tripping in of intake profile test
Position, into well with 30m3/ d day injection flow to each substratum injects intake profile test water, and the injection flow is daily
The flow that water filling uses, observation well head are used for after surveying the pressure value stabilization of the pressure gauge of inspection water injection pressure, record the pressure gauge
Pressure value P 1 is 14.2MPa, then stop water filling, take out downhole testing tool string, record the intake profile test of each substratum
Explanation results are as shown in table 2, while continue to recover daily water filling work to the water injection well；Tested for ease of next intake profile
Progress, this stage uses 50m3/ d daily water-injection rates carry out daily water filling；3）Tested away from last time intake profile and terminate and recover just
Normal daily water filling works after 8-10h, carries out second of intake profile test to water injection well to be measured, during test, day injection flow
For 50 m3/ d, after the pressure value stabilization of well head pressure gauge, the pressure value P 2 for recording the pressure gauge is 20.3 MPa, Ran Houting
Only water filling, testing tool string is taken out, the explanation results for recording the intake profile test of each substratum again are as shown in table 2；4）According to
The explanation results of intake profile test twice, obtaining each substratum, injection flow, difference are not injected under pressure on the same day at two
Day water absorption is as shown in table 3, is respectively then abscissa with day water absorption for each substratum, well head water injection pressure value is sat to be vertical
Described point is marked, then retouched coordinate points twice are connected into the water injection indication curve that life is the substratum in line, water injection indication curve
The intercept formed after extension with the intersection point of ordinate is that the well head water filling of the substratum starts pressure, describes each substratum successively respectively
Water injection indication curve, as shown in figure 1, the curve according to this figure draw respectively each substratum well head water filling start pressure result such as
Shown in table 4.This method test result, which can make each substratum of the water injection well of oil recovery technique personnel couple start pressure, instant standard
True understands and grasp, and the formulation for regular maintenance and stratum renovation technique measure provides reliable foundation.And the present invention surveys
Trying the method for each substratum startup pressure can complete by water injection well intake profile test data daily twice, it is not necessary in addition
Test equipment and test process.
Table 2
Table 3
Table 4
Claims (4)
1. a kind of quick method for determining each substratum well head water filling of water injection well and starting pressure, including following process：
1）Pressure gauge and water injection manifold scale that wellhead of water injection well to be measured connects with water injecting pump are calibrated, checks and ensures to be used for note to be measured
Instrument, the oil pipe of well intake profile test are normal；2）According to the well depth of each substratum of water injection well to be measured, will be used to detect each substratum
The instrument of intake profile test, the well depth position of each substratum of oil pipe tripping in, carried out respectively with Q1 day injection flow water filling into well
The intake profile test of substratum, after the pressure value stabilization for observing well head pressure gauge, the pressure value P 1 that records the pressure gauge be with
Well head water injection pressure during Q1 day injection flows, then stop water filling, take out downhole testing tool string, record the suction of each substratum
The explanation results of water section plane test, while recover daily water filling to the water injection well and work； 3）Test and tie away from last time intake profile
After beam and the normal daily water filling of recovery work 8-10 hours, second of intake profile test, test are carried out to water injection well to be measured
When, day injection flow be Q2, after the pressure value stabilization of well head pressure gauge, record the pressure gauge pressure value P 2 be note Q2 days
Well head water injection pressure during water-carrying capacity, then stop water filling, take out testing tool string, the intake profile for recording each substratum again is surveyed
The explanation results of examination；4）The explanation results tested according to intake profile twice, each substratum is obtained in two not water injection manifolds on the same day
Amount, the day water absorptions under difference injection pressure, are respectively abscissa with day water absorption for each substratum, well head water injection pressure value
For ordinate described point, the water injection indication curve for making that punctuate connection life is the substratum in line then will be retouched twice, it is described
The intercept formed after water injection indication curve extension with the intersection point of ordinate is that the well head water filling of the substratum starts pressure.
2. the quick method for determining each substratum well head water filling of water injection well and starting pressure according to claim 1, its feature exist
In the step 2）Noting day when working day injection flow Q1 and the daily water filling of water injection well to be measured during middle intake profile test
Water-carrying capacity is identical.
3. the quick method for determining each substratum well head water filling of water injection well and starting pressure according to claim 1, its feature exist
In the step 3）In second of intake profile test when day injection flow Q2=（1.5—2）Q1.
4. the quick method for determining each substratum well head water filling of water injection well and starting pressure according to claim 1, its feature exist
In the step 3）In the test of second intake profile start before daily water filling when day injection flow be Q2, and sustained water injection
5-8 hours.
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| CN106321076B (en) * | 2016-10-19 | 2021-05-04 | 中国石油化工股份有限公司 | Water injection well starting pressure testing method |
| CN109978303B (en) * | 2017-12-28 | 2021-07-02 | 中国石油天然气股份有限公司 | Method and device for determining exploitation measures of heavy oil reservoir and storage medium |
| CN109989744B (en) * | 2017-12-29 | 2022-05-10 | 中国石油天然气股份有限公司 | Method and device for calculating production pressure difference of multiple sets of reservoir bodies of carbonate rock |
| CN110005402B (en) * | 2017-12-29 | 2022-05-10 | 中国石油天然气股份有限公司 | Method and device for calculating production pressure difference of carbonate oil well |
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| CN102418511B (en) * | 2011-07-25 | 2014-04-02 | 中国石油天然气股份有限公司 | Pressure drop well testing analysis method for underground shut-in well of low-permeability reservoir |
| CN103291265A (en) * | 2013-06-24 | 2013-09-11 | 西南石油大学 | Method for judging full profile control degree of water injection well |
| CN104318052B (en) * | 2014-09-16 | 2017-10-27 | 中国石油大学(北京) | A kind of evaluation method of low-permeability oil deposit water drive sweep efficiency |
| CN104879103B (en) * | 2015-05-22 | 2017-07-07 | 中国石油天然气股份有限公司 | Layered water injection effect analysis method |
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