CN109666470A - A kind of compound profile-controlling and plugging agent of nano and micro materials - Google Patents
A kind of compound profile-controlling and plugging agent of nano and micro materials Download PDFInfo
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- CN109666470A CN109666470A CN201811477176.0A CN201811477176A CN109666470A CN 109666470 A CN109666470 A CN 109666470A CN 201811477176 A CN201811477176 A CN 201811477176A CN 109666470 A CN109666470 A CN 109666470A
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
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Abstract
The present invention relates to a kind of compound profile-controlling and plugging agents of nano and micro materials, its each component includes thickening crosslinking agent 3~4%, activator 4~7%, gel breaker 0.05~0.15%, fluid loss additive 0.3~1.2%, ph value regulator 0.05~0.13%, antioxidant 0.5~1.5%, fungicide 0.05~0.10%, surplus are water.It is thickened the mixture that crosslinking agent is the nano-micro level powdered rice hulls powder or nano-micro level powdered rice hulls powder and polyethyleneimine by specially treated, activator is organic acid, gel breaker is the mixture of ammonium persulfate or sodium peroxydisulfate or both, fluid loss additive is modified starch MS-5, ph value regulator is the mixture of sodium carbonate and fumaric acid, antioxidant is sodium pyrosulfite, and fungicide is formaldehyde or pentanediol.The compound profile-controlling and plugging agent of nano and micro materials of the invention has certain intensity and toughness, can be stretched lengthening deformation under certain condition, certain plugging action can be generated to the preferential path in stratum, so as to cause subsequent displacement fluid diversion, following injected water is set to enter less permeable layer, do not involve or involve the lower region of degree in centering less permeable layer and generate displacement effect, good profile control and water plugging can be played the role of.
Description
Technical field
The present invention relates to oil-gas field development technical field, in particular to oil gas field chemical field, specially one kind receives micron
Material cladding type profile-controlling and plugging agent.
Background technique
Well water problem is generally existing in oilfield development process, need to implement water blockoff to producing well and adjustment water injection well is inhaled
Water section.Especially in the polymer flooding later period, polymer is altered near small duct to be gathered seriously, and number of polymers and water are via macropore
Road flows into producing well, and polymer flooding is caused to fail, and still has about 50% crude oil to remain in underground after poly- drive.Therefore, further
Improve recovery ratio must just carry out the phenomenon that oil deposit deep part tune blocks up to solve channelling and stream, generally require plugging agent intensity compared with
It is high.Plugging agent used at present mainly has organogel system and inorganic solidified system, but these blocking agent intensity are poor, intolerant to
The flushing of water drive or polymer flooding；Poor selectivity, to it is hypertonic or in hypotonic duct can block；It is prone to clay fortune
It moves, causes formation damage.
Nanotechnology is the novel science and technology for the 80's ends of 20th century being born and emerging, and is referred to 0.10
The brand-new technology that substance and material are studied and handled on the scale of ~ 100 nm.Nanotechnology includes nano material and object
Application technology of acquisition technology, combination technique and the nano material of matter in every field.The wherein pass of nano material functionization
Key is by the modified Surface Physical Chemistry property for controlling nano material with means such as surface claddings in surface.With nanosecond science and technology
It continues to develop and the appearance of nano material, nanotechnology comes into oil field to every field infiltration.It is external
Mainly there are Surfactant Used in Viscoelastic Fracturing Fluids technology, micro-nano particle blocking technology etc..Domestic mainly includes positive electricity nano-drilling fluid skill
Art, nanometer increasing injection technology, MD membrane technology and poly- silicon nanometer increase water injection technology etc..In view of nano material with crude oil with very high
Interfacial activity, the unique small-size effect of nano material itself and skin effect, nanometer technology of reservoir sweep will likely replace changing in addition
It learns and drives, play an increasingly important role in terms of increasing substantially oil recovery factor, it is therefore, viscous for novel nano and micro materials
The research of mixture profile control and water plugging system will have great importance
It is a kind of novel oil-water well closure system that micron tune of receiving, which blocks up system,.The closure mechanism and polymer of the system block mechanism
It is much like.Micron tune of receiving, which blocks up system, has certain intensity and toughness, and can stretch lengthening deformation under certain condition.It can be to stratum
In preferential path generate certain plugging action, so as to cause subsequent displacement fluid diversion, enter following injected water hypotonic
Permeable layers.Do not involve or involve the lower region of degree in centering less permeable layer and generate displacement effect, plays the role of profile control.
Chinese patent literature CN103911134A discloses a kind of compound profile-controlling and plugging agent, which includes pre-
Cross-linked particles, polyacrylamide, crosslinking agent, regulator, water；The wherein mass percent of each component: Weak gel particle is 0.5~
5%, polyacrylamide is 0. 1~0. 3%, and crosslinking agent is 0.1~0.4%, and regulator is 0.04~0.5%, and surplus is water.
Chinese patent literature CN106675540A discloses a kind of heat and salinity tolerance profile-controlling and plugging agent and preparation method, the pressure break
Liquid is by heat and salinity tolerance polyacrylamide l~3%, crosslinking agent A 0.15~1. 2%, 0.03~0 .1% of crosslinking agent B, retarder
0.01~0.1%, pH adjusting agent 1~7.5% and water 98~99%, as obtained by certain step mixing.
Currently, the committed step of many profile-controlling and plugging agents is the preparation of nano silica, the preparation of nano silica
Method mainly has two kinds of dry and wet.Dry method includes gas-phase decomposition method and arc process, and wet process includes that vapour deposition process, chemistry are heavy
Shallow lake method,
Sol-gel method and microemulsion method etc..The nano silica purity is high of dry preparation process preparation, performance is good but sets
It is standby to invest in larger, production process that energy consumption is high, it is at high cost, therefore not frequently with mostly using wet processing to prepare both at home and abroad at present
Nano silica.But to consume energy these methods big, at high cost more, in addition has certain pollution mostly, with profile control and water plugging
The progress of agent technology, technology also should be towards environment friendly and pollution-free, at low cost, profile control and water plugging ability is strong, compatibility is good, reservoir damage
Small, thermal stability and the good direction of shearing stability property are developed.
Summary of the invention
The present invention provides a kind of compound profile-controlling and plugging agent of nano and micro materials, and the present invention is adopted using agricultural wastes as raw material
With newest mechanical and chemical activation technical know-how, organogel and inorganic gel are obtained by the mechanical and chemical activation to waste
The novel green that organic whole combines receives a micron profile control profile control agent.
Technical scheme is as follows:
A kind of compound profile-controlling and plugging agent of nano and micro materials, it is characterised in that: the compound profile-controlling and plugging agent of the nano and micro materials,
Each component includes thickening crosslinking agent, activator, gel breaker, fluid loss additive, ph value regulator, antioxidant, fungicide, water；Its
The mass percent of middle each component: thickening crosslinking agent 3~4%, activator 4~7%, gel breaker 0.05~0.15%, fluid loss additive
0.3~1.2%, pH adjusting agent 0.05~0.13%, antioxidant 0.5~1.5%, fungicide 0.05~0.10%, surplus is water.
The thickening crosslinking agent is the nano-micro level powdered rice hulls powder or nano-micro level powdered rice hulls powder by specially treated
With the mixture of polyethyleneimine.
The activator is organic acid, and organic acid is one or more of citric acid, acetic acid.
The gel breaker is the mixture of ammonium persulfate or sodium peroxydisulfate or both.
The fluid loss additive is modified starch MS-5.
The pH adjusting agent is the mixture of sodium carbonate and fumaric acid.
The antioxidant is sodium pyrosulfite.
The fungicide is formaldehyde or pentanediol.
The salt water that the water is pure water or salinity is 300 ~ 80000mg/l.
The accessible beneficial effect of the present invention is: a kind of compound profile-controlling and plugging agent of nano and micro materials, it is environment friendly and pollution-free, at
This is low, profile control and water plugging ability is strong, compatibility is good, reservoir damage is small, thermal stability and shearing stability property are good.
Specific embodiment
The present invention is described in more detail below with reference to embodiment, but protection scope of the present invention is not limited to
Content as described below.
The compound profile-controlling and plugging agent of the nano and micro materials, each component include thickening crosslinking agent, activator, gel breaker, drop
Fluid loss agents, pH adjusting agent, antioxidant, fungicide, water；The wherein mass percent of each component: thickening crosslinking agent 3~4%,
Activator 4~7%, gel breaker 0.05~0.15%, fluid loss additive 0.3~1.2%, pH adjusting agent 0.05~0.13% are anti-oxidant
Agent 0.5~1.5%, fungicide 0.05~0.10%, surplus are water.
The thickening crosslinking agent is the nano-micro level powdered rice hulls powder or nano-micro level powdered rice hulls powder by specially treated
With the mixture of polyethyleneimine.Crushing, screening process by agricultural wastes powdered rice hulls Jing Guo Pyatyi physical mechanical formula are chosen
Grain graininess reaches the powdered rice hulls powder storage of nano-micro level and saves in sealing, clean, sterile, free of contamination environment.20
DEG C~90 DEG C of water bath with thermostatic control heating under conditions of, the nano-micro level powdered rice hulls powder Jing Guo specially treated is put into pure water
Or salinity is that a certain proportion of polyethyleneimine, the two thickening crosslinking, main mesh is added in the salt water of 300 ~ 40000mg/l
Be to form inorganic gel, inorganic gel be make profile-controlling and plugging agent core starting materials.
The activator is organic acid, and organic acid is one or more of citric acid, acetic acid.The main function of activator
It is to promote to be thickened crosslinking agent fast reaction generation inorganic gel.Activator has self assembly Assembling Behavior in the solution, can be formed
Advanced reticular structure has preferable affinity with thickening crosslinking agent, therefore bright to the dismantling of thickening crosslinking agent, the glutinous effect of drop
It is aobvious.
The gel breaker is the mixture of ammonium persulfate or sodium peroxydisulfate or both.The dosage of gel breaker will be applied according to scene
Working hour is added according to actual needs.
The fluid loss additive is modified starch MS-5.The modified starch is resistant to high temperatures, can reduce dehydration to a certain extent, modified
Starch has preferable rheological characteristic, and easy-regulating is able to satisfy engineering technology requirement, and maintenance is simple, strong operability, is suitble on site
Construction.
The ph value regulator is the mixture of sodium carbonate and fumaric acid.
The antioxidant is sodium pyrosulfite.
The fungicide is formaldehyde or pentanediol.The main function of fungicide is the bacterium prevented under ground and underground environment
It breeds, causes the performance of profile-controlling and plugging agent to change, influence using effect.
The salt water that the water is pure water or salinity is 300 ~ 80000mg/l.
Embodiment 1
The present embodiment provides a kind of compound profile-controlling and plugging agents of nano and micro materials, are to be somebody's turn to do in terms of 100% by the quality of profile-controlling and plugging agent
The mass percent of profile-controlling and plugging agent each component are as follows: thickening crosslinking agent 3.5%, activator 7%, gel breaker 0.05%, fluid loss additive
0.3%, ph value regulator 0.05%, antioxidant 0.5%, fungicide 0.05%, surplus are water；Wherein thickening crosslinking agent is by special
The nano-micro level powdered rice hulls powder or nano-micro level powdered rice hulls powder very handled, activator is citric acid, and gel breaker is persulfuric acid
The mixture of ammonium and sodium peroxydisulfate, fluid loss additive are modified starch MS-5, and ph value regulator is the mixing of sodium carbonate and fumaric acid
Object, antioxidant are sodium pyrosulfite, and fungicide is formaldehyde, and water is pure water.
The process for preparation of the profile-controlling and plugging agent are as follows: when preparing the profile-controlling and plugging agent of certain mass, first will according to formula rate
Pure water is added in Agitation Tank, adds suitable nano-micro level powdered rice hulls powder by specially treated, utilizes electric stirring
Machine is stirred, then under conditions of being stirred continuously, sequentially add activator citric acid, modified starch MS-5, sodium carbonate with
Mixture, sodium pyrosulfite and the formaldehyde of fumaric acid, are sufficiently stirred the base fluid for being configured to compound profile-controlling and plugging agent, and scene is applied
Working hour is further according to the mixture for needing to be added a certain amount of ammonium persulfate and sodium peroxydisulfate.
Temperature is an important parameter, other than it can improve reaction speed, also generates other influences to reaction.Temperature
Spend height, it is possible to the structure of macromolecular chain is destroyed, so that influencing the gel strength of product；Temperature is too low, so that reactant
Activity reduces, and is not enough so as to cause reactant peptization, equally also influences the gel strength of product.
The compound profile-controlling and plugging agent of nano and micro materials in the 200ml embodiment is measured respectively, and water bath with thermostatic control is respectively set
Temperature be 50,60,70,80,90,100 DEG C, react a period of time after, measure different temperatures under gel intensity.
The gel strength variation with temperature relationship of the compound profile-controlling and plugging agent of nano and micro materials in the embodiment of table 1
| Temperature (DEG C) | 50 | 60 | 70 | 80 | 90 | 100 |
| Gel strength (mPas) | 20 | 210 | 600 | 550 | 540 | 510 |
In addition, the nano and micro materials chosen in the 200ml embodiment are multiple in the experiment for investigating influence of the high temperature to system performance
Heatproof bottle in 70 DEG C of insulating boxs is measured its viscosity after plastic by mould assembly profile-controlling and plugging agent；It is subsequently placed in 150 DEG C of constant temperature
In case, its viscosity is periodically surveyed.
2 high high-temp stability experimental result of table
| Reaction time | 0 | 5min | 10min | 30min | 1d | 30d |
| Viscosity/mPas | 600 | 590 | 580 | 550 | 540 | 535 |
From experimental result as can be seen that the reduction degree for heatproof bottle being placed in insulating box viscosity in the 30min time is most obvious,
Viscosity is reduced to 550 mPas by 600mPas.The reduction of viscosity is no longer obvious later, and still protects substantially in 1d, 30d
It is fixed to keep steady.It can be concluded that difference is not too much big although gel strength is reduced with the extension of time, oil can satisfy
Field profile control and water plugging, the needs for improving recovery ratio.So the organogel system has preferable resistance to temperature stability.
Embodiment 2
The present embodiment provides a kind of compound profile-controlling and plugging agents of nano and micro materials, are to be somebody's turn to do in terms of 100% by the quality of profile-controlling and plugging agent
The mass percent of profile-controlling and plugging agent each component are as follows: thickening crosslinking agent 3.5%, activator take two parts, and concentration is respectively 4%, 7%, break
Jelly 0.05%, fluid loss additive 0.3%, ph value regulator 0.05%, antioxidant 0.5%, fungicide 0.05%, surplus is water；Wherein
Thickening crosslinking agent is that the nano-micro level powdered rice hulls powder or nano-micro level powdered rice hulls powder, activator by specially treated are lemon
Acid, gel breaker are the mixture of ammonium persulfate and sodium peroxydisulfate, and fluid loss additive is modified starch MS-5, and ph value regulator is carbonic acid
The mixture of sodium and fumaric acid, antioxidant are sodium pyrosulfite, and fungicide is formaldehyde, water be salinity be 300 ~
The salt water of four kinds of various concentrations between 80000mg/l, and it is provided with pure water test group as a comparison.
The process for preparation of the profile-controlling and plugging agent are as follows: when preparing the profile-controlling and plugging agent of certain mass, first will according to formula rate
The salt water of various concentration is added in Agitation Tank, adds suitable nano-micro level powdered rice hulls powder by specially treated, utilizes
Electric blender is stirred, then under conditions of being stirred continuously, sequentially add activator citric acid, modified starch MS-5,
The mixture of sodium carbonate and fumaric acid, sodium pyrosulfite and formaldehyde, are sufficiently stirred the base for being configured to compound profile-controlling and plugging agent
Liquid, further according to the mixture for needing to be added a certain amount of ammonium persulfate and sodium peroxydisulfate when site operation.
Salinity will cause certain influence to the performance of profile control agent in the salinity and water flooding of water in system, so,
Influence experiment of the salinity to gel seems very necessary.Interior has chosen two groups of various concentration thickening crosslinking agents and matches with activator
The experiment of ratio, water bath with thermostatic control are set as under the conditions of 90 DEG C, and selecting salinity respectively is 2 × 104mg/L、4×104mg/L、6×
104mg/L、8×104Stratum water as solvent and the tap water of mg/L compares, to investigate influence of the system salinity to plastic rate.
Influence of the water of different salinities to profile control and water plugging system plastic rate is selected under the conditions of 3 90 DEG C of table
Experimental data shows 2 × 10 at 90 DEG C4mg/L、4×104mg/L、6×104mg/L、8×104The stratum of mg/L
In water, the plastic rate of system slightly has some reductions compared in tap water, but influences little.It is good to illustrate that the system has
Good salt-resistance, can be up to 8 × 10 in salinity4Profile adjustment and oil displacement is carried out in the stratum of mg/L.
Purpose using the compound profile-controlling and plugging agent of nano and micro materials is in order to improve recovery ratio, therefore for using the tune
The laboratory prediction for cuing open the effect after water shutoff agent is to carry out the most important content of desk research.For the oil effect of oil displacement efficiency
The laboratory prediction of fruit generally uses core physical simulation experimental method.Above-mentioned Performances of Novel Nano-Porous micron tune is evaluated by core plugging
The sealing characteristics of stifled system, such as resistance coefficient, breakthrough pressure, breakthrough pressure gradient, plugging rate, abrasion resistance.Rock core flowing
Experiment is the conventional means for disclosing the basic skills and oil field development desk research of various oil displacement processes.To nano and micro materials
Compound profile-controlling and plugging agent carries out rock core flowing experiment research, and its object is to further investigate to receive micron tune and block up the profile control machine of system
Reason and oil displacement efficiency.Using the cementing artificial core of the quartz sand of diameter 2.5cm, length 10cm, it is compound to measure nano and micro materials
The parameters such as resistance coefficient, residual resistance factor, the breakthrough pressure of profile-controlling and plugging agent, so can evaluate receive micron tune block up system exist
Sealing characteristics in porous media.Table 4 is that the compound profile-controlling and plugging agent of nano and micro materials is measured using rock core evaluation experimental to rock
Heart pore plugging rate measurement result.
4 plugging rate measurement result of table
The compound profile-controlling and plugging agent of a kind of nano and micro materials of the invention, by experimental study temperature, salinity, etc. to receiving
The influence of the compound profile-controlling and plugging agent gelation of micro materials is found, in the case where higher formation temperature, salinity, nanometer
The gelation of material is good, does not influence its using effect.It is stifled to the profile control of the profile-controlling and plugging agent by rock core evaluation test
Aqueous to have can be carried out evaluation, which has preferable stability, can play plugging action to porous media for a long time.
It is all in principle of the invention finally it should be noted that the contents of the present invention are not limited in the above embodiments
Within, made any modification, equivalent replacement etc. should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of compound profile-controlling and plugging agent of nano and micro materials, it is characterised in that: the compound profile-controlling and plugging agent of the nano and micro materials,
Its each component includes thickening crosslinking agent, activator, gel breaker, fluid loss additive, ph value regulator, antioxidant, fungicide, water；
The wherein mass percent of each component: thickening crosslinking agent 3~4%, activator 4~7%, gel breaker 0.05~0.15%, fluid loss additive
0.3~1.2%, ph value regulator 0.05~0.13%, antioxidant 0.5~1.5%, fungicide 0.05~0.10%, surplus are water.
2. the compound profile-controlling and plugging agent of a kind of nano and micro materials according to claim 1, it is characterised in that: the thickening is handed over
Join the mixing that agent is the nano-micro level powdered rice hulls powder or nano-micro level powdered rice hulls powder and polyethyleneimine by specially treated
Object.
3. the compound profile-controlling and plugging agent of a kind of nano and micro materials according to claim 1, it is characterised in that: the activator
For organic acid, organic acid is one or more of citric acid, acetic acid.
4. the compound profile-controlling and plugging agent of a kind of nano and micro materials according to claim 1, it is characterised in that: the gel breaker
For the mixture of ammonium persulfate or sodium peroxydisulfate or both.
5. the compound profile-controlling and plugging agent of a kind of nano and micro materials according to claim 1, it is characterised in that: the filtrate reducing
Agent is modified starch MS-5.
6. the compound profile-controlling and plugging agent of a kind of nano and micro materials according to claim 1, it is characterised in that: the ph value tune
Save the mixture that agent is sodium carbonate and fumaric acid.
7. the compound profile-controlling and plugging agent of a kind of nano and micro materials according to claim 1, it is characterised in that: described anti-oxidant
Agent is sodium pyrosulfite.
8. the compound profile-controlling and plugging agent of a kind of nano and micro materials according to claim 1, it is characterised in that: the fungicide
For formaldehyde or pentanediol.
9. the compound profile-controlling and plugging agent of a kind of nano and micro materials according to claim 1, it is characterised in that: the water is pure
The salt water that water purification or salinity are 300 ~ 80000mg/l.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110591679A (en) * | 2019-10-16 | 2019-12-20 | 西南石油大学 | Granular profile control agent adaptive to size of pore throat of stratum and preparation method thereof |
| CN110628396A (en) * | 2019-09-29 | 2019-12-31 | 中国石油集团川庆钻探工程有限公司钻井液技术服务公司 | Environment-friendly temperature-resistant salt-resistant filtrate reducer for well drilling and preparation method thereof |
| CN111394076A (en) * | 2020-04-24 | 2020-07-10 | 天津鑫源工程技术有限公司 | Preparation method of profile control and flooding agent with efficient plugging effect for low-permeability reservoir |
| CN111499793A (en) * | 2020-05-28 | 2020-08-07 | 北京九恒质信能源技术有限公司 | Nano composite polymer and temperature-resistant and salt-resistant profile control agent containing same |
| CN113122212A (en) * | 2020-01-13 | 2021-07-16 | 中国石油天然气股份有限公司 | Preparation method and application of profile control agent |
| CN115044356A (en) * | 2022-08-12 | 2022-09-13 | 中海油田服务股份有限公司 | Profile control and flooding agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof |
| WO2023164561A1 (en) * | 2022-02-23 | 2023-08-31 | University Of Maryland, College Park | Self-degrading organogels |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628396A (en) * | 2019-09-29 | 2019-12-31 | 中国石油集团川庆钻探工程有限公司钻井液技术服务公司 | Environment-friendly temperature-resistant salt-resistant filtrate reducer for well drilling and preparation method thereof |
| CN110628396B (en) * | 2019-09-29 | 2021-11-02 | 中国石油集团川庆钻探工程有限公司钻井液技术服务公司 | Environment-friendly temperature-resistant salt-resistant filtrate reducer for well drilling and preparation method thereof |
| CN110591679A (en) * | 2019-10-16 | 2019-12-20 | 西南石油大学 | Granular profile control agent adaptive to size of pore throat of stratum and preparation method thereof |
| CN113122212A (en) * | 2020-01-13 | 2021-07-16 | 中国石油天然气股份有限公司 | Preparation method and application of profile control agent |
| CN113122212B (en) * | 2020-01-13 | 2022-10-04 | 中国石油天然气股份有限公司 | Preparation method and application of profile control agent |
| CN111394076A (en) * | 2020-04-24 | 2020-07-10 | 天津鑫源工程技术有限公司 | Preparation method of profile control and flooding agent with efficient plugging effect for low-permeability reservoir |
| CN111499793A (en) * | 2020-05-28 | 2020-08-07 | 北京九恒质信能源技术有限公司 | Nano composite polymer and temperature-resistant and salt-resistant profile control agent containing same |
| WO2023164561A1 (en) * | 2022-02-23 | 2023-08-31 | University Of Maryland, College Park | Self-degrading organogels |
| CN115044356A (en) * | 2022-08-12 | 2022-09-13 | 中海油田服务股份有限公司 | Profile control and flooding agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof |
| CN115044356B (en) * | 2022-08-12 | 2022-10-25 | 中海油田服务股份有限公司 | Profile control and flooding agent suitable for high-temperature and high-salinity oil reservoir and preparation method thereof |
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Application publication date: 20190423 |
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