CN1105417A - Crosslinked polymer oil displacement agent and preparation method thereof - Google Patents
Crosslinked polymer oil displacement agent and preparation method thereof Download PDFInfo
- Publication number
- CN1105417A CN1105417A CN 93115276 CN93115276A CN1105417A CN 1105417 A CN1105417 A CN 1105417A CN 93115276 CN93115276 CN 93115276 CN 93115276 A CN93115276 A CN 93115276A CN 1105417 A CN1105417 A CN 1105417A
- Authority
- CN
- China
- Prior art keywords
- agent
- polyacrylamide
- polymer
- crosslinking agent
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920006037 cross link polymer Polymers 0.000 title claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 title claims description 6
- 238000002360 preparation method Methods 0.000 title abstract description 4
- 239000000243 solution Substances 0.000 claims abstract description 30
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 26
- 229920000642 polymer Polymers 0.000 claims abstract description 24
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 11
- JVTAAEKCZFNVCJ-UHFFFAOYSA-M Lactate Chemical compound CC(O)C([O-])=O JVTAAEKCZFNVCJ-UHFFFAOYSA-M 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- 229920001285 xanthan gum Polymers 0.000 claims description 4
- 230000007062 hydrolysis Effects 0.000 claims description 3
- 238000006460 hydrolysis reaction Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 2
- 239000007863 gel particle Substances 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 5
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- XFJRTXJMYXFAEE-UHFFFAOYSA-K [Cr+3].CC(O)C([O-])=O.CC(O)C([O-])=O.CC(O)C([O-])=O Chemical compound [Cr+3].CC(O)C([O-])=O.CC(O)C([O-])=O.CC(O)C([O-])=O XFJRTXJMYXFAEE-UHFFFAOYSA-K 0.000 abstract 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- 229920002396 Polyurea Polymers 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000015784 hyperosmotic salinity response Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
A cross-linked polymer oil-displacing agent features that a cross-linking agent is added in the process of injecting polymer solution to increase viscosity of polymer solution in stratum, compensate the excessive loss of polymer viscosity caused by mechanical shearing, improve oil-displacing effect and increase recovery rate. The polymer is mainly polyacrylamide, and the cross-linking agent is mainly chromium lactate. The preparation and injection method and the equipment are simple and reliable and have low cost.
Description
The present invention relates to the method and apparatus of exploitation oil gas from deep-well.
(patent No. is 0142929A to European patent
2) a kind of polymer oil-displacing agent and compound method thereof disclosed.The main component of its oil displacement agent is a polyacrylamide.Its compound method is with directly injecting the stratum behind the polyacrylamide dilute with water, improving the mobility ratio between displacing fluid and the driven liquid, to improve oil recovery factor.But because the polyacrylamide salt tolerance is poor, and is subject to mechanical shearing and degrades, molecular weight is descended greatly, the polymer solution viscosity loss of injecting the stratum is a lot, compares with ground, and viscosity can reduce by 60～70%, causes oil displacement efficiency bad.On the other hand, because viscosity is low, the polymer solution of injection along ground floor height osmosizing portion position channelling, causes the waste of injectant easily, does not reach the purpose that improves recovery ratio.
The purpose of this invention is to provide a kind of crosslinked polymer oil-displacing agent, it can compensate the degraded that causes owing to mechanical shearing in the polymer solution injection process, improves the viscosity of polymer solution in the stratum, reaches the purpose that improves recovery ratio.
Two of purpose of the present invention provides a kind of preparation and method for implanting of cross-linked polymer, and the polymer solution viscosity of injection is increased, and the polymer solution that prevents to inject is along the high permeability zone channelling.
The objective of the invention is to reach like this:
Polymer through preparation, is become a kind of cross-linking polymer system.This mainly is made up of gelatinizing agent and crosslinking agent, and gelatinizing agent is polyacrylamide (or xanthans), and its working concentration is 500～20000mg/l; Crosslinking agent is a Chromic lactate, and its working concentration is 10～5000mg/l.Gelatinizing agent and crosslinking agent can mix in injection process, also can reinject after mixing.
Polymer formulation is become cross-linking polymer system and injects well, its compound method and install as follows:
As shown in Figure 1.Water is fed in the funnel (2), polyacrylamide colloid is added in the hopper (10) of Squeezinggranulator (3), extrude to fall in the funnel through the screw feeder (11) of comminutor and mix with water;
The mixed liquor of polyacrylamide gel particles and water is sucked by gear pump (4), and further extruding, cutting pump in the dissolving tank (5), dissolving, slaking 2-10 hour (1 ℃～90 ℃ of temperature) under the stirring of mixer (6);
The polyacrylamide solution that slaking is good injects well (9) with dedicated pump (7), simultaneously cross-linking agent solution is injected in dedicated pump (7) the last liquid pipeline before with the ratio that the concentration in total solution reaches 10～5000mg/l by measuring pump (8), thus, crosslinking agent mixes with polyacrylamide solution, together inject well, under the formation temperature effect, produce slowly, lightly crosslinked, polymer solution viscosity is being greatly increased, it is quick owing to salt in the stratum to have compensated polymer solution, the polymer solution viscosity that mechanical shearing causes significantly loses, avoided conventional polymer to drive and easily caused the problem of polymer solution, can save the chemical agent of a large amount of costlinesses along ground floor height osmosizing portion position channelling.Relevant cross-linked polymer tackify result of the test sees Table 1, table 2, table 3.
Purpose of the present invention can also reach by following steps:
Gelatinizing agent is polyacrylamide (or xanthans), and degree of hydrolysis is 0～35%, working concentration scope 500～20000mg/l.
Crosslinking agent is a Chromic lactate, working concentration scope 10～5000mg/l.
Used special-purpose injection pump is the commercially available low shearing that can suct water certainly, low pulsation, permanent discharge capacity three-cylinder plunger pump.
In the process of injection of polymer solution, add cross-linking agent solution, also can gelatinizing agent with reinject after crosslinking agent mixes.
Fig. 1 is the compound method flow chart of cross-linked polymer solution.
Be described further below in conjunction with embodiment:
The colloidal polyurea acrylamide (degree of hydrolysis 10%) of getting content 25% adds tap water and is made into the solution that concentration is 1000mg/l, gets two parts, each 200ml, and a copy of it adds the crosslinking agent Chromic lactate, and the concentration that makes crosslinking agent in the solution is 500mg/l, and another part does not add crosslinking agent.With these two parts sealed thermostats 60 ℃, 72 hours together, take out viscosimetric respectively, the results are shown in Table 2.
As accompanying drawing, water enters funnel (2) through pipeline (1), by water meter (13) metered flow, and valve (12) control flow.The colloidal polyurea acrylamide of content 25% is added by the hopper (10) of Squeezinggranulator (3); behind screw feeder (11) extruder grain, clamp-on in the funnel (2) and mix with water; again by sending in jar (5) after further cutting of gear pump (4), the extruding; slaking is 4 hours under the stirring of mixer (6), injects well (9) by SL3ZB-30HJ dedicated pump (7).Cross-linking agent solution is mixed in the polyacrylamide solution in proportion in the front portion of dedicated pump (7) by measuring pump (8) simultaneously.Crosslinking agent is 500mg/l in total concentration of injecting liquid.
The present invention has following advantage compared to existing technology:
1, it is big to inject the cross-linked polymer solution viscosity on stratum, and can repeatedly shear, and repeatedly repeats crosslinkedly, improves several times with non-cross-linked polymer phase specific viscosity. Data see Table 1,2,3.
2, because the viscosity height can be controlled injectant along the high permeability zone channelling, improve recovery ratio. Obtained remarkable result with this cross-linked polymer and compound method thereof in the Gudong field field trial. Two mouthfuls of aboveground injections, three mouthfuls of oil wells take effect on every side, and wherein two mouthfuls of oil wells take effect obviously, moisturely drop to respectively 59.9% and 83.5% by 75.1% and 88.6%, and the term of validity 9 months increases 5975 tons of oil.
Table 1 polyacrylamide tackify test (concentration of polyacrylamide 500mg/l)
Table 2 polyacrylamide tackify test (concentration of polyacrylamide 1000mg/l)
Table 3 polyacrylamide tackify test (concentration of polyacrylamide 2000mg/l)
Claims (10)
1, a kind of polymer oil-displacing agent of forming by water and polyacrylamide, it is characterized in that a kind of cross-linked polymer, gelatinizing agent mainly is polyacrylamide or xanthans, its concentration in water is 500～20000mg/l, crosslinking agent mainly is a Chromic lactate, working concentration is 10～5000mg/l, and gelatinizing agent and crosslinking agent can mix in injection process, in the well that also can reinject after mixing.
2, oil displacement agent according to claim 1 is characterized in that said gelatinizing agent is a polyacrylamide, and degree of hydrolysis is 0～35%, and working concentration is 500～20000mg/l.
3, oil displacement agent according to claim 1 is characterized in that said gelatinizing agent is an xanthans, and working concentration is 500～20000mg/l.
4, oil displacement agent according to claim 1 and 2, the said crosslinking agent of its feature is a Chromic lactate, working concentration is 10～5000mg/l.
5, a kind of compound method of the polymer oil-displacing agent of being made up of water and polyacrylamide is characterized in that having the following steps:
A, water is added in the funnel (2), colloid shape polyacrylamide is added in the hopper (10) of extruder (3),, fall in the funnel (2) and mix with water through screw feeder (11) extruder grain;
B, send in the dissolving tank (5) under the stirring of mixer (6) slaking 2-10 hour after with gear pump (4) mixed liquor of polyacrylamide gel particles and water further being cut, pushes;
C, the polyacrylamide solution that slaking is good inject well (9) with dedicated pump, use crosslinking agent pump (8) before special-purpose injection pump crosslinking agent to be mixed in the polyacrylamide solution by a certain percentage simultaneously and together inject into well.
6, according to the described compound method of claim (5), it is characterized in that said a, b, three steps of c carry out continuously, also can carry out respectively.
7,, it is characterized in that said dedicated pump is a kind of three-cylinder plunger pump that can self-priming liquid according to claim 5 or 6 described compound methods.
8, according to claim 5 or 6 described compound methods, it is characterized in that the concentration of said polyacrylamide solution is 500～20000mg/l, be preferably 800～8000mg/l.
9, according to claim 5 or 6 described compound methods, it is characterized in that said crosslinking agent is a Chromic lactate solution, the concentration in total solution is 10～5000mg/l, is preferably 300～3000mg/l.
10, according to claim 5 or 6 described compound methods, it is characterized in that in the process of injection of polymer, adding cross-linking agent solution, or in the well that in gelatinizing agent, reinjects behind the adding crosslinking agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93115276 CN1105417A (en) | 1993-12-23 | 1993-12-23 | Crosslinked polymer oil displacement agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93115276 CN1105417A (en) | 1993-12-23 | 1993-12-23 | Crosslinked polymer oil displacement agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1105417A true CN1105417A (en) | 1995-07-19 |
Family
ID=4990929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93115276 Pending CN1105417A (en) | 1993-12-23 | 1993-12-23 | Crosslinked polymer oil displacement agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1105417A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093429C (en) * | 1999-03-31 | 2002-10-30 | 陈耀 | Non-pollutant emulsifier |
| CN102174317A (en) * | 2011-03-09 | 2011-09-07 | 大庆润海科技发展有限公司 | Profile control agent suitable for ASP flooding |
| CN103912258A (en) * | 2014-04-02 | 2014-07-09 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Mechanism for controlling cross-linking agents |
| CN106795749A (en) * | 2014-10-15 | 2017-05-31 | Snf公司 | Use the chemical enhanced oil recovery method of thickening macromolecular compound |
| CN107638715A (en) * | 2017-09-07 | 2018-01-30 | 中国石油天然气股份有限公司 | A kind of poly table agent solution ground injecting system and its method for implanting suitable for mining site |
| US10301909B2 (en) | 2011-08-17 | 2019-05-28 | Baker Hughes, A Ge Company, Llc | Selectively degradable passage restriction |
| CN110410047A (en) * | 2019-06-17 | 2019-11-05 | 中国石油天然气股份有限公司 | A kind of flooding method and its gas energy release oil displacement agent for high gassiness oil field |
| CN110684518A (en) * | 2019-10-22 | 2020-01-14 | 中国石油化工股份有限公司 | Biological polysaccharide movable gel for oil displacement and preparation method thereof |
| CN113775321A (en) * | 2020-05-21 | 2021-12-10 | 中国石油天然气股份有限公司 | Determination device for shear viscosity loss of polymer solution or chemical flooding system thereof and application |
-
1993
- 1993-12-23 CN CN 93115276 patent/CN1105417A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093429C (en) * | 1999-03-31 | 2002-10-30 | 陈耀 | Non-pollutant emulsifier |
| CN102174317A (en) * | 2011-03-09 | 2011-09-07 | 大庆润海科技发展有限公司 | Profile control agent suitable for ASP flooding |
| US10301909B2 (en) | 2011-08-17 | 2019-05-28 | Baker Hughes, A Ge Company, Llc | Selectively degradable passage restriction |
| CN103912258B (en) * | 2014-04-02 | 2016-05-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of mechanism that controls crosslinking agent |
| CN103912258A (en) * | 2014-04-02 | 2014-07-09 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Mechanism for controlling cross-linking agents |
| CN106795749A (en) * | 2014-10-15 | 2017-05-31 | Snf公司 | Use the chemical enhanced oil recovery method of thickening macromolecular compound |
| CN106795749B (en) * | 2014-10-15 | 2019-08-06 | Snf公司 | Use the chemical strengthening oil recovery method of thickening high-molecular compound |
| US10760399B2 (en) | 2014-10-15 | 2020-09-01 | Snf Sa | Chemically enhanced oil recovery method using viscosity-increasing polymeric compounds |
| CN107638715A (en) * | 2017-09-07 | 2018-01-30 | 中国石油天然气股份有限公司 | A kind of poly table agent solution ground injecting system and its method for implanting suitable for mining site |
| CN107638715B (en) * | 2017-09-07 | 2019-09-10 | 中国石油天然气股份有限公司 | A kind of poly table agent solution ground injecting system and its method for implanting suitable for mining site |
| CN110410047A (en) * | 2019-06-17 | 2019-11-05 | 中国石油天然气股份有限公司 | A kind of flooding method and its gas energy release oil displacement agent for high gassiness oil field |
| CN110684518A (en) * | 2019-10-22 | 2020-01-14 | 中国石油化工股份有限公司 | Biological polysaccharide movable gel for oil displacement and preparation method thereof |
| CN113775321A (en) * | 2020-05-21 | 2021-12-10 | 中国石油天然气股份有限公司 | Determination device for shear viscosity loss of polymer solution or chemical flooding system thereof and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4744418A (en) | Delayed polyacrylamide gelation process for oil recovery applications | |
| US4706754A (en) | Oil recovery process using a delayed polymer gel | |
| US5975206A (en) | Acid gels for fracturing subterranean formations | |
| US5377760A (en) | Fiber reinforced gel for use in subterranean treatment processes | |
| CN1105417A (en) | Crosslinked polymer oil displacement agent and preparation method thereof | |
| CA1271127A (en) | Accelerated polymer gelation process for oil recovery applications | |
| CN108559479B (en) | Reverse microemulsion polymer fracturing liquid system capable of being constructed on line | |
| CN1048738A (en) | Prevent the method for the lost circulation of oil drilling | |
| WO1988002806A1 (en) | Rate-controlled polymer gelation process for oil recovery applications | |
| CN102558469B (en) | Cross-linking agent for profile control and oil displacement for high-temperature oil reservoir, as well as preparation method and application for same | |
| CN101435317A (en) | Loss return drop-out cross linked gel plugging process | |
| CN116200183A (en) | High-efficiency variable-viscosity fracturing fluid for deep coal bed gas development and integrated construction method | |
| CN111944508A (en) | Emulsification viscosity-reduction oil-displacing agent, preparation method thereof and viscous oil viscosity-reduction oil-displacement fracturing method | |
| CN110872507A (en) | Non-crosslinked fracturing fluid, preparation method and application thereof and non-crosslinked fracturing fluid thickener | |
| CN104962264A (en) | Selective controllable five-slug gel profile adjusting and water plugging agent and profile adjusting and water plugging method | |
| CN102952532B (en) | Method for improving viscosity stability of oil field polymer flooding | |
| CN1414038A (en) | Modified asphalt and its preparation method | |
| US7475727B2 (en) | Methods of improving conformance control in fractured hydrocarbon reservoirs | |
| CN1182182C (en) | Preparation of deep modifier for cross-linked polymer solution (LPS) | |
| CN111647106B (en) | Viscoelastic polymer emulsion and preparation method thereof, low-viscosity slippery water and high-viscosity sand-carrying fluid | |
| CN111393566A (en) | Fracturing fluid emulsion stock solution, preparation method thereof, slick water and suspended sand fracturing fluid | |
| CN1253497C (en) | Preparation process of slow cross-linking agent for acrylic amide gel | |
| CN113652213B (en) | Composite emulsifier for ultra-high temperature resistant water-in-oil emulsified drilling fluid and drilling fluid | |
| CN105504157B (en) | Low-tension hydroxyl oximido emulsion flooding polymers and preparation method thereof | |
| CN1034376A (en) | Acid thickening composition prepares the AMPS/Am multipolymer through radiation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) |