CN1427135A - Underground continuous metering and layered water injection method and device for water injection well - Google Patents
Underground continuous metering and layered water injection method and device for water injection well Download PDFInfo
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- CN1427135A CN1427135A CN 01144560 CN01144560A CN1427135A CN 1427135 A CN1427135 A CN 1427135A CN 01144560 CN01144560 CN 01144560 CN 01144560 A CN01144560 A CN 01144560A CN 1427135 A CN1427135 A CN 1427135A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 163
- 239000007924 injection Substances 0.000 title claims abstract description 124
- 238000002347 injection Methods 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000010410 layer Substances 0.000 claims abstract description 64
- 238000012937 correction Methods 0.000 claims abstract description 13
- 210000002445 nipple Anatomy 0.000 claims description 19
- 239000011229 interlayer Substances 0.000 claims description 4
- 239000011440 grout Substances 0.000 claims description 2
- 238000011161 development Methods 0.000 abstract description 3
- 239000002356 single layer Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 28
- 238000012360 testing method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 5
- 238000012797 qualification Methods 0.000 description 5
- 238000012795 verification Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The invention relates to a method and a device for continuous metering and layered water injection under a water injection well in a water injection development oil field, wherein a water injection well separate injection layer is determined, an electronic flowmeter is placed in a separate injection layer section under the well, and correction is carried out through error coefficients of a well head and the underground flowmeter; metering the accumulated water amount of each separate injection single layer by a formula; the device comprises an underground flowmeter 7, a water distributor 8 and a water nozzle 9, wherein the water distributor 8 is arranged in an oil pipe 2, the water distributor working barrel 3 is sleeved outside the water distributor 8, the underground flowmeter 7 is arranged on the water distributor 8, and a fishing head 6 is arranged on the underground flowmeter 7.
Description
Technical field
The present invention relates to a kind of water injection well under well continuous metering layered water injection method and device in the waterflooding oil field.
Background technology
The technology that waterflooding oil field is carried out seperated layer water injection has the two-layer dispensing of ground one-level, down-hole eccentric center water-distributing dispensing, hydraulic running and pulling.
One-level two-layer dispensing in ground is a kind of oil, the sleeve pipe technology of water filling respectively, there are two bigger defectives in this dispensing technology: the one, and the dispensing number of plies is few, can only dispensing two-layer, can't satisfy dispensing needs more than three layers or three layers, the 2nd, the tubing and casing dispensing, can't realize oil jacket annular space protection, sleeve pipe is subjected to heavy corrosion in the long-term injecting water process, has shortened water injection well application life;
The cardinal principle that down-hole dispensing technology adopts is to represent a certain stage average discharge with certain instantaneous delivery that measures constantly, judge thus and think that water injection rate is adding up of this average discharge, the down-hole eccentric center water-distributing dispensing technology and the hydraulic running and pulling technology that generally adopt as each oil field, it exists the technical problem of two aspects to solve: the one, and eccentric water nozzle dropping-fishing test difficulty, it is frequent to fall the card accident; The 2nd, be difficult to test and obtain qualified layering water distribution data, even the data that measures is qualified,, can not represent the Total Water that injects each section stratum to meet the requirements because of just instantaneous delivery is qualified.The long-term instantaneous delivery that facts have proved that the eccentric center water-distributing dispensing measures is very unstable, qualified at that time, cross several hours defective again, be inaccurate with the accumulative total injection rate of instantaneous delivery longer a period of time of conversion.
Accurately measure two-layer injected water volume though one-level two-layer dispensing technology in ground can be distinguished, it can only annotate two-layer and the sleeve pipe water filling is subjected to heavy corrosion; Though down-hole eccentric center water-distributing dispensing technology can be annotated more than three layers or three layers and not water filling of sleeve pipe, its each individual layer injected water volume is inaccurate.
Summary of the invention
The object of the present invention is to provide a kind of oil pipe water filling, not water filling of sleeve pipe, can divide water filling more than three layers or three layers, and guarantee each individual layer water injection rate accurately, water injection well under well continuous metering layered water injection device intuitively.
The present invention is achieved in that
Water injection well under well continuous metering layered water injection method
1. determine the water injection well separate injection layer, be separated out each well section of seperated layer water injection, per two dispensing purposes with packer
The interlayer thickness of interlayer is greater than 2m;
2. electronic grout flow meter is put into the down-hole separate injection interval, proofreaied and correct by well head and downhole flowmeter error coefficient;
Correction coefficient=ground flow meter metering Total Water/I level instrument water yield
3.. measure each dispensing individual layer accumulated water volume with following formula;
The I layer water yield=(the I level instrument water yield-II level instrument water yield) * correction coefficient
The II layer water yield=(the II level instrument water yield-III level instrument water yield) * correction coefficient
The III layer water yield=III level instrument water yield * correction coefficient
In the time of will dropping into pit shaft together and carry out water filling, need throw stratum earlier, secondly be the second layer, is first floor at last.
Downhole flowmeter adapts to water injection well injection rate: 20m
3/ d-300m
3/ d; Applicable temperature is 10 ℃-80 ℃; Be suitable for working pressure range≤60MP.
Apparatus of the present invention comprise sleeve pipe 1, oil pipe 2, injection well downhole flow regulator seating nipple 3, packer 5, drag for 6, downhole flowmeter 7, injection well downhole flow regulator 8, injection well downhole flow regulator seating nipple water stream channel 10, oil pipe 2 is arranged in the sleeve pipe 1, between sleeve pipe 1 and the oil pipe 2 packer 5 is arranged, injection well downhole flow regulator 8 is arranged in the oil pipe 2, the injection well downhole flow regulator 8 outer injection well downhole flow regulator seating nipples 3 that are with, downhole flowmeter 7 is housed on the injection well downhole flow regulator 8, drags for 6 on the downhole flowmeter 7.
Injection well downhole flow regulator seating nipple water stream channel 10 is arranged on the injection well downhole flow regulator seating nipple 3.
Water nozzle 9 is arranged on the injection well downhole flow regulator 8.
Water nozzle 9 on the injection well downhole flow regulator 8 can be more than one.
Trapezoidal injection well downhole flow regulator 81 is housed between injection well downhole flow regulator 8 and the injection well downhole flow regulator seating nipple 3.
Down-hole continuous metering zonal injection technology technology has been compared following advantage (i.e. this technology features, the just advance of technology) with the down-hole eccentric center water-distributing zonal injection technology technology that generally use now in the oil field with hollow water distribution zonal injection technology technology.
1, change the integrated flow metering into by the test and measuring instantaneous delivery, the instantaneous delivery of any time belongs to innovation point in the also desirable complete period simultaneously.Eliminate the instantaneous delivery deviation and caused layered actual injection amount to differ bigger influence, improved the order of accuarcy of layering injected water volume.
2, zonal testing qualified with car group fate by original more than 7 days, dropping to 2-3 days can the injection allocation test passes, improves work efficiency more than one times.
3, the multi-zone flow regulating qualification rate is brought up to more than 80% by original 50-70%, and Oilfield Company specified layers injection allocation qualification rate is 70%.Can satisfy the needs of oil field multi-zone flow regulating fully.
Down-hole continuous metering zonal injection technology technology has been compared following advantage with the two-layer zonal injection technology of ground one-level:
1, the ground dispensing can only realize two-layer dispensing; Down-hole continuous metering zonal injection technology technology can realize two layers, three layers, four layers dispensing, can satisfy the separated-zone water infection oil field needs better.
2, one-level two-layer dispensing in ground is serious to casing corrosion, has shortened well application life; Therefore down-hole continuous metering zonal injection technology technology does not exist this kind defective because of being oil pipe central tube dispensing.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a single layer structure schematic diagram of the present invention;
Fig. 3 is the structural scheme of mechanism of seating nipple 3
Fig. 4 is the vertical view of seating nipple 3.
Concrete enforcement
Down-hole continuous metering dispensing technology application process step
1, selects to adopt the water injection well of the continuous dispensing technology in down-hole
According to the requirement of water injection well downhole packer, thickness of interlayer is not less than 2m between two dispensing target zones, could realize the valid block envelope of packer, and the needs of should base area plasmogamy during design separate injection layer position annotating satisfy the requirement of seat sealing layer greater than 2m again.
2, determine to select for use downhole packer and combination thereof
The number of plies of seperated layer water injection is as required designed the injection well downhole flow regulator and the flow meter of the different size dimensions of each separate injection layer, and injection well downhole flow regulator, flow meter, seating nipple cooperatively interact.Draw out the casing programme schematic diagram, mark the accurate position of each downhole tool.
3, according to the casing programme schematic diagram, write the measure of well workover geology, and by the figure construction.
4, verification packer sealing
After workover treatment is finished, verify the leakproofness of downhole packer, if the seat envelope is not tight, must do over again, be lowered to packer again.
5, downhole flowmeter verification
At ground verification downhole flowmeter, require error in dipping≤2%, as error in dipping＞2%, need demarcate again downhole flowmeter, select to use qualified flow meter.
6, select water nozzle
Every layer of water yield design formulas of the water yield, water flow pipes damage, strata pressure, sharp-tongued curve and the zonal injection technology that injects according to every layer of needs, the water nozzle of initial option suitable size, and it is installed on the injection well downhole flow regulator.
7, throw in flow meter
After downhole flowmeter, injection well downhole flow regulator and water nozzle installed, free fall type was thrown in flow meter from injection well tubing.At first casting bottom, secondly is last layer, throws in successively, up to the superiors.When throwing in, the correct time of the good every layer of input of record, and the accurate reading of ground water meter.
8, the water yield is regulated
Throw in good each layer flow meter for the first time after 1-3 days, pull downhole flowmeter out with the wire rope car.At first dragging for the superiors, secondly is the second layer, drags for successively to the bottom (with throwing in the flow meter reversed in order).
To pull flow meter and computer out and link, the injected water volume with data readback program playback outflow meter record compares with the injection allocation water yield, if injection rate is excessive, then turns water nozzle down, if water injection rate is too small, then transfers big water nozzle.
After adjusting water nozzle, flow meter work can repeat the art operation after 1-3 days, reached requirement until the water injection rate error, and general water nozzle adjustment 2-3 time (it is more that first dispensing is adjusted number of times, and repeatedly test back adjustment number of times just reduces) can reach the water injection rate error requirements.After the water injection rate error meets the demands, flow meter is dropped into the down-hole again, to pull out after can making its continuous metering to 50 day, image data drops into the down-hole once more after the charging down to flow meter and uses.
Downhole flowmeter adapts to water injection well injection rate: 20m
3/ d-300m
3/ d; Applicable temperature is 10 ℃-80 ℃ (general about 40 ℃ of domestic water injection well in oil fields down-hole water temperatures); (domestic oil-field flooding well pressure generally≤45MP) to be suitable for working pressure range≤60MP.
The seating nipple of designing different inner diameters is connected with oil pipe, designs the injection allocation device of different size, and supporting downhole flowmeter cooperates with seating nipple, forms down-hole continuous metering zone separate injection technical string.Seating nipple internal diameter and injection allocation device external diameter closely cooperate, undermost seating nipple internal diameter of process pipe string and injection allocation device outside dimension minimum, the second layer is big slightly than orlop, the superiors' maximum, still, the superiors' injection allocation device must guarantee to pass through oil pipe, other two-layer must guaranteeing by packer, the downhole flowmeter size must be less than or equal to injection allocation device size, connects flow meter on the injection well downhole flow regulator, connect on the flow meter and drag for head, adopt steel wire center pulling.Every injection well downhole flow regulator 8 can be installed two water nozzles 9, and by a water nozzle adjustment individual layer assignment of traffic ratio of transposing different size size, flow meter is adopted a counting and stored, and regularly pulls flow meter out and passes through computer playback program playback of data.Inject water and be metered into oil pipe → flow to I level water distribution fuse → water nozzle → enter stratum through well head
↓
Flow to II level water distribution fuse → water nozzle → enter stratum
↓
Flow to III level water distribution fuse → water nozzle → enter stratum
Then three layers of each individual layer water yield of dispensing well are respectively:
The I layer water yield=I level instrument water yield-II level instrument water yield
The II layer water yield=II level instrument water yield-III level instrument water yield
The III layer water yield=III level instrument water yield
If consider the Systematic Errors that metering exists, we can also proofread and correct by well head and downhole flowmeter error coefficient.
Correction coefficient=ground flow meter metering Total Water/one-level instrument water yield
The I layer water yield=(the I level instrument water yield-II level instrument water yield) * correction coefficient
The II layer water yield=(the II level instrument water yield-III level instrument water yield) * correction coefficient
The III layer water yield=III level instrument water yield * correction coefficient
In actual test process, less because of downhole flowmeter and surface water Watch Error, its precision has reached the injection allocation error requirements, and the stratified water amount data are got actual value, need not proofread and correct.
At present, our factory has been used this down-hole continuous metering zonal injection technology in 14 mouthfuls of water injection wells, and the dispensing qualification rate reaches more than 80.0%.Now lift two wells this implementation of processes example as an illustration.
1,1503 wells
According to the oil field development dynamic analysis, the 1503# well need be carried out different injected water volume water fillings to two intervals, we have designed 2 cover injection allocation device sizes for this reason, draw out this well casing programme schematic diagram, (this well depth 1435.4m, packer location 1351.73m, packer model KCY-211, the downhole flowmeter position is respectively at 1361.68m and 1342.36m), write out the well workover measure, implement workover treatment, carry out testing seal about packer, carry out the verification of downhole flowmeter ground, throw in flow meter, (this aboveground layer water injection rate is designed to 30m to adjust the water nozzle size
3/ d, lower floor's water injection rate is designed to 40m
3/D selects water nozzle at first for use, and the upper strata is φ 10mm, and lower floor is φ 8mm, by 3 adjustment water nozzles, finally is adjusted into upper strata φ 8mm, and the φ 6mm of lower floor promptly reaches the water injection rate requirement).By dispensing more than a year, amount to 36 layers of dropping-fishing tests 18 times, qualified 29 layers, dispensing qualification rate 80.5%.Average test was with 1.7 days.
2,1444 wells
According to the oil field development dynamic analysis, 1444# need carry out different injected water volume water fillings to three intervals, we have designed three cover injection allocation device sizes for this reason, draw out this well well bore junction structure schematic diagram (this well depth 2260.0m, the packer location is respectively at 2126.4m, 2182.76m, the packer model is respectively Y111-114, Y211-114, the downhole flowmeter position is respectively at 2059.93m, 2164.19m, 2212.71m,) write out the well workover measure, implement workover treatment, carry out testing seal about packer, carry out the verification of downhole flowmeter ground, throw in flow meter, (this is aboveground to adjust the water nozzle size, in, injected water volume was respectively 30m when lower floor designed
3/D, 30m
3/ d, 20m
3/ d selects for use the water nozzle size to be respectively φ 10mm, φ 8mm, φ 6mm at first, adjusts through 2 times for the first time, selects for use the water nozzle size for φ 8mm, φ 6mm, φ 4mm at last, promptly arrives the injected water volume designing requirement).By dispensing more than a year, amount to 21 layers of dropping-fishing tests 7 times, qualified 18 layers, dispensing qualification rate 85.7%.Average test was with 1.6 days.
Claims (8)
1. water injection well under well continuous metering layered water injection method is characterized in that:
1. determine the water injection well separate injection layer, be separated out each well section of seperated layer water injection with packer, thickness of interlayer is greater than 2m between per two dispensing target zones;
2. electronic grout flow meter is put into the down-hole separate injection interval, proofreaied and correct by well head and downhole flowmeter error coefficient;
Correction coefficient=ground flow meter metering Total Water/I level instrument water yield
3.. measure each dispensing individual layer accumulated water volume with following formula;
The I layer water yield=(the I level instrument water yield-II level instrument water yield) * correction coefficient
The II layer water yield=(the II level instrument water yield-III level instrument water yield) * correction coefficient
The III layer water yield=III level instrument water yield * correction coefficient
2. a kind of water injection well under well continuous metering layered water injection method according to claim 1 is characterized in that: in the time of will dropping into pit shaft together and carry out water filling, need throw stratum earlier, secondly be the second layer, is first floor at last.
3. a kind of water injection well under well continuous metering layered water injection method according to claim 1 is characterized in that: downhole flowmeter adapts to water injection well injection rate: 20m
3/ d-300m
3/ d; Applicable temperature is 10 ℃-80 ℃; Be suitable for working pressure range≤60MP.
4. water injection well under well continuous metering layered water injection device, comprise sleeve pipe (1), oil pipe (2), injection well downhole flow regulator seating nipple (3), packer (5), drag for head (6), downhole flowmeter (7), injection well downhole flow regulator (8), water nozzle (9), injection well downhole flow regulator seating nipple water stream channel (10), oil pipe (2) is arranged in the sleeve pipe (1), between sleeve pipe (1) and the oil pipe (2) packer (5) is arranged, it is characterized in that: injection well downhole flow regulator (8) is arranged in the oil pipe (2), the outer injection well downhole flow regulator seating nipple (3) that is with of injection well downhole flow regulator (8), downhole flowmeter (7) is housed on the injection well downhole flow regulator (8), drags for head (6) on the downhole flowmeter (7).
5. a kind of water injection well under well continuous metering layered water injection device according to claim 4 is characterized in that: injection well downhole flow regulator seating nipple water stream channel (10) is arranged on the injection well downhole flow regulator seating nipple (3).
6. a kind of water injection well under well continuous metering layered water injection device according to claim 4 is characterized in that: water nozzle (9) is arranged on the injection well downhole flow regulator (8).
7. a kind of water injection well under well continuous metering layered water injection device according to claim 4 is characterized in that: the water nozzle (9) on the injection well downhole flow regulator (8) can be more than one.
8. a kind of water injection well under well continuous metering layered water injection device according to claim 4 is characterized in that: between injection well downhole flow regulator (8) and the injection well downhole flow regulator seating nipple (3) trapezoidal injection well downhole flow regulator (81) is housed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01144560 CN1427135A (en) | 2001-12-21 | 2001-12-21 | Underground continuous metering and layered water injection method and device for water injection well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01144560 CN1427135A (en) | 2001-12-21 | 2001-12-21 | Underground continuous metering and layered water injection method and device for water injection well |
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| CN1427135A true CN1427135A (en) | 2003-07-02 |
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|---|---|---|---|
| CN 01144560 Pending CN1427135A (en) | 2001-12-21 | 2001-12-21 | Underground continuous metering and layered water injection method and device for water injection well |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469607B (en) * | 2007-12-24 | 2012-07-04 | 中国石油大港油田第五采油厂 | Water injection technological process using three parameters test curve for layered pulling and running for water injection allocation |
| CN103953307A (en) * | 2007-04-19 | 2014-07-30 | Fmc技术股份有限公司 | Christmas tree with internally positioned flowmeter |
| CN104863568A (en) * | 2015-06-01 | 2015-08-26 | 方永和 | Layered testing and adjustment process for injection well |
| CN104989340A (en) * | 2015-06-17 | 2015-10-21 | 成都高普石油工程技术有限公司 | Oil well water injection oil extraction method |
| CN109113690A (en) * | 2017-06-23 | 2019-01-01 | 中国石油天然气股份有限公司 | Method for determining separate injection layer section of separate injection well |
| CN110185434A (en) * | 2019-05-23 | 2019-08-30 | 张建华 | The fluid of oil gas water well injects or the measuring device and its method of output distribution flow |
| CN111811594A (en) * | 2020-07-22 | 2020-10-23 | 西安罗格石油仪器有限公司 | Well divides and annotates long-term electromagnetic flowmeter in pit for injection network |
| CN113338881A (en) * | 2021-07-23 | 2021-09-03 | 西安洛科电子科技股份有限公司 | Wave code communication intelligent water distributor flow underground online calibration method |
-
2001
- 2001-12-21 CN CN 01144560 patent/CN1427135A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953307A (en) * | 2007-04-19 | 2014-07-30 | Fmc技术股份有限公司 | Christmas tree with internally positioned flowmeter |
| CN103953307B (en) * | 2007-04-19 | 2016-11-09 | Fmc技术股份有限公司 | There is the production tree of effusion meter in positioned internal |
| CN101469607B (en) * | 2007-12-24 | 2012-07-04 | 中国石油大港油田第五采油厂 | Water injection technological process using three parameters test curve for layered pulling and running for water injection allocation |
| CN104863568A (en) * | 2015-06-01 | 2015-08-26 | 方永和 | Layered testing and adjustment process for injection well |
| CN104863568B (en) * | 2015-06-01 | 2017-09-26 | 方永和 | Injection well zonal testing and allocating technology |
| CN104989340A (en) * | 2015-06-17 | 2015-10-21 | 成都高普石油工程技术有限公司 | Oil well water injection oil extraction method |
| CN109113690A (en) * | 2017-06-23 | 2019-01-01 | 中国石油天然气股份有限公司 | Method for determining separate injection layer section of separate injection well |
| CN109113690B (en) * | 2017-06-23 | 2020-07-10 | 中国石油天然气股份有限公司 | Method for determining separated injection layer section of separated water injection well |
| CN110185434A (en) * | 2019-05-23 | 2019-08-30 | 张建华 | The fluid of oil gas water well injects or the measuring device and its method of output distribution flow |
| CN110185434B (en) * | 2019-05-23 | 2023-03-17 | 张建华 | Measuring device and method for fluid injection or production distribution flow of oil-gas-water well |
| CN111811594A (en) * | 2020-07-22 | 2020-10-23 | 西安罗格石油仪器有限公司 | Well divides and annotates long-term electromagnetic flowmeter in pit for injection network |
| CN113338881A (en) * | 2021-07-23 | 2021-09-03 | 西安洛科电子科技股份有限公司 | Wave code communication intelligent water distributor flow underground online calibration method |
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