CN105505355A - Clear water-sewage mixed profile control agent - Google Patents
Clear water-sewage mixed profile control agent Download PDFInfo
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- CN105505355A CN105505355A CN201410498031.4A CN201410498031A CN105505355A CN 105505355 A CN105505355 A CN 105505355A CN 201410498031 A CN201410498031 A CN 201410498031A CN 105505355 A CN105505355 A CN 105505355A
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Abstract
The invention provides a clear water-sewage mixed profile control agent. The clear water-sewage mixed profile control agent comprises a water-based profile control and water shutoff, solid particles, polyacrylamide, a cross-linking agent and a conditioning agent in a mass ratio of (5-10):(0.5-1.0):(0.1-0.5):(1.0-2.0):(0.1-0.2). The invention also provides the application of the clear water-sewage mixed profile control agent. The clear water-sewage mixed profile control agent provided by the invention has good water shut-off and profile control performance, can improve the water injection profiles of water injection wells, prevents unreasonable water channeling along fracture direction and flooding, and realizes efficient and high efficiency water injection, thereby reaching the purposes of improving the reservoir use degree and oil displacement efficiency.
Description
Technical field
The present invention relates to a kind of mixing clean water with sewage and join amendment, belong to oilfield exploitation assistant medicament technical field.
Background technology
Along with most of oil field, the whole nation enters high water cut viscous heavy crude oil, the continuous increase of oil field comprehensive moisture content, current oil well is on average moisture reaches more than 80%, faces many new problems in water plugging and profile controlling.Adjust stifled difficulty increasing, the classical way of traditional use polyacrylamide water blockoff, because its temperature resistant antisalt performance is poor, be easy to degrade, and damage at formation, oil reservoir in varying degrees, cause its application to be restricted.In current research, by the polyacrylamide series amendment research of various cross-linking system, can performance be improved and obtain good effect of field application.
Naiman oilfield has water-injection plant 1 at present, and injection water is clear water, in order to make full use of the sewage of extraction, prepares clear water and sewage mixed water injection, and by clear water in the past, sewage quality analysis, after predicting clear, dirty mixed water injection, the fouling had based on calcium carbonate produces.Affect by reservoir properties, how graceful oil well must assist Hydro Fracturing Stimulation Treatment just tool commercial mining value.Therefore, the crack that pressure break produces is huge on flood effectiveness impact, and along fracture orientation, the phenomenon such as water breakthrough, water logging easily occurs, if can not effectively administer, oil displacement efficiency will constantly decline, and steady output of oilwell recovery ratio declines.Realize Naiman oilfield long term stable production target, must in conjunction with the geologic feature of this block, on the basis of fracturing fracture direction spread and well pattern adaptability scrutiny, carry out water injection well transfer drive Study on Process and application, improve the intake profile of water injection well, realize effective water filling, efficient water injection, thus reach the object improving reservoir development degree and oil displacement efficiency, realize block stable yields target, promoting the use of this technology can be carried out in other oil field simultaneously.
Summary of the invention
In view of the defect that above-mentioned prior art exists, the object of the invention is to propose a kind of mixing clean water with sewage and join amendment, can mixed water injection of removing contamination be applicable to, there is good water plugging and profile controlling performance, improve the intake profile of water injection well, prevent irrational water breakthrough along fracture orientation, water logging.
Object of the present invention is achieved by the following technical programs:
A kind of mixing clean water with sewage joins amendment, it comprises water base plugging agent, solid phase particles, polyacrylamide, linking agent and conditioning agent, wherein, each component concentration in mass, water base plugging agent: solid phase particles: polyacrylamide: linking agent: conditioning agent=(5-10): (0.5-1.0): (0.1-0.5): (1.0-2.0): (0.1-0.2).
Above-mentioned mixing clean water with sewage is joined in amendment, and preferably, described water base plugging agent is made up of anionic polyacrylamide and cationic polyacrylamide.
Above-mentioned mixing clean water with sewage is joined in amendment, preferably, with molar ratio computing, and anionic polyacrylamide: cationic polyacrylamide=10: 1-10: 3.
Above-mentioned mixing clean water with sewage is joined in amendment, and preferably, described solid phase particles comprises colophonium powder and/or rubber, but is not limited thereto.
Above-mentioned mixing clean water with sewage is joined in amendment, and preferably, described linking agent comprises water-soluble organic phenol urea formaldehyde, but is not limited thereto.
Above-mentioned mixing clean water with sewage is joined in amendment, and preferably, described conditioning agent is oxalic acid, but is not limited thereto.
Above-mentioned oxalic acid is oxalic acid solid crystal (also can be take pure substance as the oxalic acid solution that basis conversion becomes corresponding amount, such as strength of solution can be 0.1wt%-0.2%), and it act as the gelation time controlling mixing clean water with sewage and join amendment.
Above-mentioned mixing clean water with sewage is joined in amendment, and described gel profile control agent can also comprise antiscale inhibiter, sterilant.
The present invention also provides above-mentioned mixing clean water with sewage to join the application of amendment in the profile control operation of oil field, and described application comprises joins amendment by mixing clean water with sewage and mixing clean water with sewage part injects the step that oil well carries out oil field profile control and water plugging operation jointly.
In above-mentioned application, preferably, described mixing clean water with sewage part is mixed by clear water and sewage, wherein, and the volume of clear water: volume=2 of sewage: 1.
According to embodiment and a large amount of experimental studies, consider the various factors that may affect the compatibleness of mixing clean water with sewage part, and by a large amount of laboratory experiments, think that the good mixture body of compatibleness is clear water: the volume ratio of sewage is 2:1, by the survey, research and analysis of the graceful regional reservoir characteristics to how, the reaction mechanism of amendment is joined in conjunction with mixing clean water with sewage, different components is on the impact of performance of profile modification, the performance analysis of amendment, amendment morphological analysis and the simulated experiment of amendment rock core, optimize the mixing clean water with sewage being suitable for Naiman oilfield profile control and join amendment (granule type), determine its optimal high-efficient profile control agent prescription: by water base plugging agent, solid phase particles, polyacrylamide, linking agent, conditioning agent forms, mass ratio is (5-10): (0.5-1.0): (0.1-0.5): (1.0-2.0): (0.1-0.2).This amendment and mixing clean water with sewage part inject oil reservoir jointly, have sealing characteristics good, adapt to the advantage of on-the-spot needs etc.Amendment gelation time is adjustable between 24h-30d, and gelling strength is greater than 5000mPas; The plugging rate of amendment to rock core is greater than 80%, validity period 1 year; After profile control, initial stage average trigger pressure rising, intake profile change.
Outstanding effect of the present invention is:
Mixing clean water with sewage of the present invention joins amendment, be applicable to mixed water injection of removing contamination, there is good water plugging and profile controlling performance, the intake profile of water injection well can be improved, prevent irrational water breakthrough along fracture orientation, water logging, realize effective water filling, efficient water injection, thus reach the object improving reservoir development degree and oil displacement efficiency.
Embodiment
Below by specific embodiment, method of the present invention is described, be easier to make technical solution of the present invention understand, grasp, but the present invention is not limited thereto.Experimental technique described in following embodiment, if no special instructions, is ordinary method; Described reagent and material, if no special instructions, all can obtain from commercial channels.
Embodiment 1
The present embodiment provides a kind of mixing clean water with sewage to join amendment.It comprises water base plugging agent, solid phase particles, polyacrylamide, linking agent and conditioning agent, wherein, each component concentration in mass, water base plugging agent: solid phase particles: polyacrylamide: linking agent: conditioning agent=7: 0.7: 0.5: 1.5: 0.15.
Described water base plugging agent is made up of anionic polyacrylamide and cationic polyacrylamide, with molar ratio computing, and anionic polyacrylamide: cationic polyacrylamide=10: 1; Described solid phase particles is colophonium powder and/or rubber; Described linking agent is water-soluble organic phenol urea formaldehyde; Described conditioning agent is oxalic acid.
The mixing clean water with sewage of the present embodiment joins the gel profile control agent of amendment by water base plugging agent, solid phase particles, polyacrylamide, linking agent and conditioning agent being mixed to get.
The shut-off capacity of mixing clean water with sewage being joined to amendment is tested, and carries out the simulated experiment of shut-off capacity rock core:
Adopt artificial cores, people is for making crack (adding a part of Thief zone core on hyposmosis core).Rate of permeation, sealing ratiod is surveyed according to SY/T5590-2004 standard.Experimental data is as shown in table 1 (mixing clean water with sewage joins amendment water plugging rate experimental data).
Table 1
| Amendment sequence number | Consumption | Stifled front rate of permeation (μm 2) | Stifled rear rate of permeation (μm 2) | Water plugging rate (%) |
| 1 | 0.5PV | 156×10 -2 | 6.24×10 -3 | 99.6 |
| 2 | 0.5PV | 105×10 -2 | 9.45×10 -3 | 99.1 |
| 3 | 0.5PV | 585×10 -3 | 21.6×10 -3 | 96.3 |
| 4 | 0.5PV | 280×10 -3 | 15.7×10 -3 | 94.4 |
As seen from the above table, the mixing clean water with sewage of the present embodiment is joined amendment and is had good sealing characteristics.
Embodiment 2
The present embodiment provides a kind of mixing clean water with sewage to join amendment, it comprises water base plugging agent, solid phase particles, polyacrylamide, linking agent and conditioning agent, wherein, each amounts of components in mass, water base plugging agent: solid phase particles: polyacrylamide: linking agent: conditioning agent=8: 0.8: 0.2: 1.3: 0.1.
Described water base plugging agent is made up of anionic polyacrylamide and cationic polyacrylamide, with molar ratio computing, and anionic polyacrylamide: cationic polyacrylamide=10: 1; Described solid phase particles is colophonium powder and/or rubber; Described linking agent is water-soluble organic phenol urea formaldehyde; Described conditioning agent is oxalic acid.
The mixing clean water with sewage of the present embodiment joins the gel profile control agent of amendment by water base plugging agent, solid phase particles, polyacrylamide, linking agent and conditioning agent being mixed to get.
The mixing clean water with sewage of the present embodiment gained is joined amendment apply, mixing clean water with sewage is joined amendment to mix with mixing clean water with sewage part and jointly inject oil well and carry out oil field profile control and water plugging operation, by percentage to the quality, wherein, water base plugging agent 8.33wt%, solid phase particles 0.83wt%, polyacrylamide 0.23wt%, linking agent 1.3wt%, conditioning agent 0.13wt%, its surplus is mixing clean water with sewage part; In mixing clean water with sewage part, the volume of clear water: volume=2 of sewage: 1.
With Liaohe Oil Field, how 1-58-34 well is for Injection Well, well depth 2083.0m, and water injection pressure is 8Mpa, day water filling 27m
3, formation porosity 11%, perforation thickness is 59.2m/20 layer, and treatment radius is designed to 10.0m.
First calculate mixing clean water with sewage and join amendment and the total consumption of mixing clean water with sewage part, then prepare mixing clean water with sewage in proportion and join amendment, calculation formula is as follows:
R
repair=R × T
Q=3.14R
repair 2h Φ=300 (m
3); Wherein, R is blocking radius, T is correction factor, Q is plugging agent consumption, H is core intersection, Φ is porosity; The total consumption of the present embodiment is 300m
3.
According to calculation formula gained amendment composition and consumption as shown in table 2:
Table 2
| Sequence number | Medicament title | Content (%) | Consumption (ton) |
| 1 | Water base plugging agent | 8.33 | 25 |
| 2 | Solid particulate | 0.83 | 2.5 |
| 3 | Polyacrylamide | 0.23 | 0.7 |
| 4 | Linking agent | 1.3 | 4.0 |
| 5 | Conditioning agent | 0.13 | 0.4 |
Then utilize former well water injection string that the mixing clean water with sewage prepared is joined amendment and mixing clean water with sewage part injects stratum; Then 20m is used
3water injects and replaces, and closing well was produced after 48 hours.Production result shows, and after how 1-58-34 well carries out profile control construction, water injection pressure brings up to 8.5MPa from the 8MPa before measure, and intake profile obviously improves.
Claims (8)
1. a mixing clean water with sewage joins amendment, it comprises water base plugging agent, solid phase particles, polyacrylamide, linking agent and conditioning agent, wherein, each component concentration in mass, water base plugging agent: solid phase particles: polyacrylamide: linking agent: conditioning agent=(5-10): (0.5-1.0): (0.1-0.5): (1.0-2.0): (0.1-0.2).
2. mixing clean water with sewage according to claim 1 joins amendment, it is characterized in that: described water base plugging agent is made up of anionic polyacrylamide and cationic polyacrylamide.
3. mixing clean water with sewage according to claim 2 joins amendment, it is characterized in that: with molar ratio computing, anionic polyacrylamide: cationic polyacrylamide=10: 1-10: 3.
4. mixing clean water with sewage according to claim 1 joins amendment, it is characterized in that: described solid phase particles comprises colophonium powder and/or rubber.
5. mixing clean water with sewage according to claim 1 joins amendment, it is characterized in that: described linking agent comprises water-soluble organic phenol urea formaldehyde.
6. mixing clean water with sewage according to claim 1 joins amendment, it is characterized in that: described conditioning agent is oxalic acid.
7. the mixing clean water with sewage described in any one of claim 1-6 joins the application of amendment in the profile control operation of oil field, and described application comprises joins amendment by mixing clean water with sewage and mixing clean water with sewage part injects the step that oil well carries out oil field profile control and water plugging operation jointly.
8. application according to claim 7, is characterized in that: described mixing clean water with sewage part is mixed by clear water and sewage, wherein, and the volume of clear water: volume=2 of sewage: 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410498031.4A CN105505355A (en) | 2014-09-25 | 2014-09-25 | Clear water-sewage mixed profile control agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410498031.4A CN105505355A (en) | 2014-09-25 | 2014-09-25 | Clear water-sewage mixed profile control agent |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086210A (en) * | 2007-07-13 | 2007-12-12 | 辽河石油勘探局 | Profile control and water plugging technology for coal bed gas |
| CN101724384A (en) * | 2008-10-29 | 2010-06-09 | 中国石油天然气股份有限公司 | Preparation method of high strength elastic slow-expansion water-absorption particle diverting agent |
| CN103216211A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | Method for carrying out profile control on fracture-type oil reservoir |
| CN203808926U (en) * | 2014-02-26 | 2014-09-03 | 中国石油天然气股份有限公司 | Profile control injection system for supper-heavy oil well |
-
2014
- 2014-09-25 CN CN201410498031.4A patent/CN105505355A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086210A (en) * | 2007-07-13 | 2007-12-12 | 辽河石油勘探局 | Profile control and water plugging technology for coal bed gas |
| CN101724384A (en) * | 2008-10-29 | 2010-06-09 | 中国石油天然气股份有限公司 | Preparation method of high strength elastic slow-expansion water-absorption particle diverting agent |
| CN103216211A (en) * | 2012-01-18 | 2013-07-24 | 中国石油天然气股份有限公司 | Method for carrying out profile control on fracture-type oil reservoir |
| CN203808926U (en) * | 2014-02-26 | 2014-09-03 | 中国石油天然气股份有限公司 | Profile control injection system for supper-heavy oil well |
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Application publication date: 20160420 |