CN103225496A - Profile control method for immobile string of injection well - Google Patents
Profile control method for immobile string of injection well Download PDFInfo
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- CN103225496A CN103225496A CN2013101181334A CN201310118133A CN103225496A CN 103225496 A CN103225496 A CN 103225496A CN 2013101181334 A CN2013101181334 A CN 2013101181334A CN 201310118133 A CN201310118133 A CN 201310118133A CN 103225496 A CN103225496 A CN 103225496A
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- tubular column
- control method
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Abstract
The invention relates to a profile control method for an immobile string of an injection well. The method comprises the following steps: firstly fishing up the water faucet of the injection well and injecting clear water and a high-viscosity temporary plugging agent into a pit shaft for preprocessing the pit shaft; then sequentially injecting gel particles, inorganic gel and weak gel into an oil pipe to perform the profile control and controlling the sizes of the diameters of the gel particles to guarantee that the gel particles can pass through the water faucet; and finally adopting a high-efficiency gel breaker to wash the pit shaft to reduce the viscosity of the high-viscosity temporary plugging agent, back washing the high-viscosity temporary plugging agent out of the pit shaft, and completing the profile control operation for the immobile string of the injection well. The method is easy to operate, time-saving and labor-saving.
Description
Technical field
The present invention relates to the petroleum production engineering field, be specifically related to a kind of dispensing well fixed tubular column profile control method.
Background technology
During oil field dispensing well profile control operation at present, at first to trip out former well separate injection tubing string, descend the profile control tubing string again, trip out the profile control tubing string after profile control is finished, be lowered to separate injection tubing string again and carry out dispensing.Play lower tubular column four times in this process, its workload is big, the operating cost height, and the engineering time is long.And before lift pipe string, must prolong the engineering time, increase workload the well pressure release.Also very easily blocking agent is counter tells to pit shaft lift pipe string because of pressure release causes after profile control is finished, and influences profile control effect.
Summary of the invention
In order to solve above technical problem, the invention provides a kind of dispensing well fixed tubular column profile control method, saved the step that repeatedly plays lower tubular column, saved the engineering time, avoided that blocking agent is counter tells.
This invention is achieved through the following technical solutions:
A kind of dispensing well fixed tubular column profile control method comprises the steps:
Water nozzle on the injection well downhole flow regulator of dispensing well water injection string is picked up, vacate the hole of laying water nozzle on the described injection well downhole flow regulator, in described oil pipe, inject the sticking diverting agent of clear water and height described oil pipe and oil jacket annular space are carried out preliminary treatment;
Inject gel particle, inorganic gel and weak gel successively to described oil pipe and carry out profile control, the diameter of described gel particle satisfies the requirement by the hole of laying water nozzle on the injection well downhole flow regulator;
Adopt efficient gel breaker to clean described oil pipe, reduce the viscosity of high sticking diverting agent, the sticking diverting agent backwash of height is gone out described oil pipe, finish the operation of dispensing well fixed tubular column profile control.
In technique scheme, the sticking diverting agent of described height is that partially hydrolyzed polyacrylamide (PHPA) is by being cross-linked to form.
In technique scheme, the particle diameter of described gel particle, inorganic gel, three kinds of blocking agents of weak gel is all in the 1-3mm scope.
In technique scheme, the injection total amount of described gel particle, inorganic gel and weak gel is by formula V=π R
2H ф (1-S
Or) calculate, wherein R is for needing the dispensing well shaft radius of profile control, and H is the profile control formation thickness, and ф is a profile control stratum average pore, S
OrBe remaining oil saturation.
In technique scheme, described efficient gel breaker is composite dose an of ammonium persulfate.
Dispensing well fixed tubular column profile control method of the present invention is owing to picked up water nozzle, directly, saved the step that repeatedly plays lower tubular column, reduced workload by injecting the profile control blocking agent in the oil pipe of former tubing string, saved the engineering time, avoided causing the anti-phenomenon of telling of blocking agent because of lift pipe string.
Description of drawings
The dispensing well water injection string structural representation that Fig. 1 provides for the embodiment of the invention.
The dispensing well profile control tubular column structure schematic diagram that Fig. 2 provides for the embodiment of the invention.
The specific embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Referring to Fig. 1, be a kind of dispensing well water injection string structural representation that the embodiment of the invention provides, before carrying out the profile control construction, the water nozzle on the eccentric injection mandrel 23 is all picked up, it is dispensing well profile control tubing string, referring to Fig. 2.Inject 30 side's clear water from oil pipe 1, and then inject high sticking diverting agent from oil pipe 1; High sticking diverting agent can be to following oil pipe 1 of injection well downhole flow regulator and oil jacket annular space 5, and the oil jacket annular space is the space between oil pipe 1 and the sleeve pipe 4, and oil pipe 1 and oil jacket annular space 5 are carried out blocking up temporarily, prevents the sedimentation therein of follow-up blocking agent.Then, gel particle, inorganic gel, the weak gel that injects as blocking agent from oil pipe 1 successively again; Total consumption of gel particle, inorganic gel, weak gel is by V=π R
2H ф (1-S
Or) obtain, R is for needing the dispensing well shaft radius of profile control, it is 25 meters, H is the profile control formation thickness, is 13 meters, and ф is a profile control stratum average pore, be 12.56%, remaining oil saturation (through after a certain oil production method or the displacement effect, still can not extraction and the crude oil that residues in the oil reservoir hole is called residual oil, its volume percentage of shared volume in blowhole is called residual oil saturation S
Or), be 40% in this example.So V=3.14 * 25
2* 13 * 12.56% * (1-40%) ≈ 1923m
3The particle diameter of described gel particle, inorganic gel, three kinds of blocking agents of weak gel is all in the 1-3mm scope, the size of blocking agent particle diameter is mainly installed the hole size of water nozzle, the expansion character decision of gel particle by injection well downhole flow regulator, if the gel diameter is excessive, it can not pass through injection well downhole flow regulator, imbibition makes its migration ratio difficult after entering the stratum in addition, therefore is difficult to reach earth formation deep shutoff crack; The gel diameter is too small, and suction back intensity can reduce, and diameter is too small in addition, is easy to migrate after entering the stratum under bigger production pressure, makes the water breakthrough blocking agent of injection enter the stratum.
Blocking agent enters oil jacket annular space 5 by the hole of laying water nozzle 3 on the eccentric injection mandrel 2, enters the stratum by the perforation on the sleeve pipe 4 again.But big crack in the gel particle shutoff stratum, inorganic gel is that further shutoff is carried out in crack and big duct, strengthens the intensity of blocking agent, and weak gel is that shutoff is carried out in the fine pore, and play the effect of the displacement of reservoir oil, the comprehensive use of three kinds of blocking agents reaches stifled, transfer, drive and combine.Owing to picked up water nozzle 3, there is not the throttling of water nozzle 3 just can guarantee the throughput of blocking agent, can reach conventional 1.5-3m
3Therefore the throughput of/h has guaranteed that gel particle, inorganic gel, weak gel fully inject at short notice, thereby guarantees in the stratum to play profile control effect preferably than large fracture and duct abundant shutoff at short notice.The size of control gel particle makes it can reach profile control effect preferably again by the hole of laying water nozzle 3 on the eccentric injection mandrel 2, behind the profile control well water filling normal, the water injection well water injection pressure rises, the water-absorption surface suction on water injection well stratum evenly.
Blocking agent is injected efficient gel breaker after injecting, and closing well carries out well-flushing about two hours again, and is unimpeded up to reaching tubing string, and the water quality of tubing string export and import is the same.
Recovery is to the tubing string water filling, and the profile control construction finishes.
Dispensing well fixed tubular column profile control method of the present invention is owing to picked up water nozzle, directly by injecting the profile control blocking agent in the oil pipe of former tubing string, saved the step that repeatedly plays lower tubular column, workload reduces, operating cost is low, has saved the engineering time, after profile control is finished without lift pipe string, avoided that blocking agent is counter tells to pit shaft because of pressure release causes, guaranteed profile control effect.
It should be noted last that, above embodiment is only unrestricted in order to implementer's case that this material is described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (5)
1. dispensing well fixed tubular column profile control method is characterized in that: comprises the steps,
Water nozzle (3) on the injection well downhole flow regulator (2) of dispensing well water injection string is picked up, vacate the hole of laying water nozzle on the injection well downhole flow regulator (2), in oil pipe (1), inject the sticking diverting agent of clear water and height oil pipe (1) and oil jacket annular space (5) are carried out preliminary treatment;
Inject gel particle, inorganic gel and weak gel successively to oil pipe (1) and carry out profile control, the diameter of described gel particle satisfies by laying the requirement in the hole of water nozzle on the injection well downhole flow regulator (2);
Adopt efficient gel breaker to clean described oil pipe (1), reduce the viscosity of high sticking diverting agent, the sticking diverting agent backwash of height is gone out described oil pipe (1), finish the operation of dispensing well fixed tubular column profile control.
2. dispensing well fixed tubular column profile control method as claimed in claim 1 is characterized in that: the sticking diverting agent of described height is that partially hydrolyzed polyacrylamide (PHPA) is by being cross-linked to form.
3. dispensing well fixed tubular column profile control method as claimed in claim 1 is characterized in that: the particle diameter of described gel particle, inorganic gel, three kinds of blocking agents of weak gel is all in the 1-3mm scope.
4. dispensing well fixed tubular column profile control method as claimed in claim 1 is characterized in that: the injection total amount of described gel particle, inorganic gel and weak gel is by formula V=π R
2H ф (1-S
Or) calculate, wherein R is for needing the dispensing well shaft radius of profile control, and H is the formation thickness of profile control, and ф is the stratum average pore of profile control, S
OrBe remaining oil saturation.
5. dispensing well fixed tubular column profile control method as claimed in claim 1 is characterized in that: described efficient gel breaker is composite dose an of ammonium persulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310118133.4A CN103225496B (en) | 2013-04-07 | 2013-04-07 | A kind of dispensing well fixed tubular column profile control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310118133.4A CN103225496B (en) | 2013-04-07 | 2013-04-07 | A kind of dispensing well fixed tubular column profile control method |
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| CN103225496A true CN103225496A (en) | 2013-07-31 |
| CN103225496B CN103225496B (en) | 2016-12-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968635A (en) * | 2017-03-28 | 2017-07-21 | 四川光亚聚合物化工有限公司 | A kind of efficient depth profile control method of Low Damage |
| CN108825158A (en) * | 2018-06-15 | 2018-11-16 | 中国石油集团长城钻探工程有限公司 | A kind of bushing pipe reinforcing pre- blocking method of well |
| CN111827920A (en) * | 2019-04-22 | 2020-10-27 | 中国石油天然气股份有限公司 | Layered gas channeling plugging process for fireflooding production well |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968635A (en) * | 2017-03-28 | 2017-07-21 | 四川光亚聚合物化工有限公司 | A kind of efficient depth profile control method of Low Damage |
| CN106968635B (en) * | 2017-03-28 | 2019-03-19 | 四川光亚聚合物化工有限公司 | A kind of efficient depth profile control method of Low Damage |
| CN108825158A (en) * | 2018-06-15 | 2018-11-16 | 中国石油集团长城钻探工程有限公司 | A kind of bushing pipe reinforcing pre- blocking method of well |
| CN111827920A (en) * | 2019-04-22 | 2020-10-27 | 中国石油天然气股份有限公司 | Layered gas channeling plugging process for fireflooding production well |
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| Publication number | Publication date |
|---|---|
| CN103225496B (en) | 2016-12-28 |
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