CN100471928C - Efficient multifunctional clay anti-expension stabilizer for injecting water and its production - Google Patents
Efficient multifunctional clay anti-expension stabilizer for injecting water and its production Download PDFInfo
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- CN100471928C CN100471928C CNB2006100441940A CN200610044194A CN100471928C CN 100471928 C CN100471928 C CN 100471928C CN B2006100441940 A CNB2006100441940 A CN B2006100441940A CN 200610044194 A CN200610044194 A CN 200610044194A CN 100471928 C CN100471928 C CN 100471928C
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- oil
- potassium alginate
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Abstract
A multifunctional efficient clay anti-swelling stabilizer for injecting water consists of BH-2018 surface activator 70-85 wt%, potassium alginate 5-20 wt%, KOH and NH4Cl 5-15 wt%. The process is carried out by putting BH-2018 surface activator, potassium alginate, KOH and NH4Cl into sealed pressure reactor at normal pressure, starting while agitating, raising temperature to 60-100 degree, reacting for 0.5-20 hrs, cooling to 15-30 degree, adding into NH4Cl, and agitating for 0.5-1 hr. It can be used for various explorations and developments, such as drilling liquid, completing liquid, operation killing, perforating completion and acid process protection.
Description
Technical field
The present invention relates to a kind ofly can improve efficient multifunctional clay anti-expension stabilizer for injecting water of oil recovery and preparation method thereof.
Background technology
At present, in the operation of oil water flooding recovery, the capillary channel of the passage of transfer oil or infiltration oil is with after injection water contacts in water sensitivity or the strong sensitive reservoir oil field, clay mineral and strata structure can absorb moisture and expand, the micro powder granule migration takes place easily, and blocking channel can't carry out displacement of reservoir oil by filling water, oil also can't enter output well, and the oil that causes storing in the stratum can't be exploited.Therefore must take the anti-swollen measure of continuous effective in the whole process of oil-field development, the waterflooding of especially strong water-sensitive reservoir more should be paid much attention to the injury of clay mineral hydration swelling effect to oil reservoir.Existing clay swelling or the clay stabilizer of preventing mainly is small molecules quaternary ammonium salt or polyquaternium cationoid tensio-active agent or they and KCl, CaCl
2Or NH
4Cl etc. are composite and make, though play certain anti-swollen stabilization, but these expansion-resisting agent erosion resistibilities are poor, bigger to formation damage, cause easily because of the well cover becomes, cover decreases the consequence that seriously can't implement effective zonal injection, finally cause a series of oil-field development problems such as interlayer contradiction is outstanding.
Summary of the invention
The purpose of this invention is to provide a kind of efficient multifunctional clay anti-expension stabilizer for injecting water and preparation method thereof, it can overcome the above-mentioned shortcoming of prior art.
A kind of efficient multifunctional clay anti-expension stabilizer for injecting water is characterized in that by BH-2018 tensio-active agent, potassium alginate, KOH and NH
4Cl forms, and their weight percentage scope is respectively 70～85%, 5～20%, 1～5% and 5～15%.
The preparation method of above-mentioned clay anti-expension stabilizer is characterized in that taking by weighing BH-2018 tensio-active agent, potassium alginate, KOH and NH by above-mentioned weight percentage
4Cl adds BH-2018 tensio-active agent, potassium alginate and KOH in the seal-off pressure reactor down in normal temperature, normal pressure earlier, starts and stirs, and is warming up to 60～100 ℃ gradually, reacts 0.5～20 hour, is cooled to 15～30 ℃ then, adds NH
4Cl continues to stir 0.5～1 hour.
The advantage of clay anti-expension stabilizer of the present invention is that it and clay mineral have extremely strong bonding force, and compatibleness is good, and it is in conjunction with having non-reversibility, and erosion resistibility is strong, therefore has long-lastingly, is applicable to water-sensitive strata, particularly strong water-sensitive strata.When oil-field flooding operation, anti-swollen stablizer of the present invention is together injected well; its hydrophilic radical and capillary wall clay mineral generation chemical reaction; ion that bonding force is strong or group replace the weak easy expansion dispersive ion of binding ability; with the chemical bond mortise; thereby form one deck protectiveness adsorption film at capillary surface, the oil reservoir clay mineral is fixed on original position.And after several component synergies, not only clay particle is surrounded each other, by stoping water molecules to prevent the clay water-swelling with contacting of clay particle, prevented that the secondary that the clay mineral fine migration causes from stopping up, and can get through the kapillary that has stopped up, made kapillary unimpeded, finally reach the reduction water injection pressure, guarantee the unimpeded inflow recovery well of oil, guarantee the normally effect of stable exploitation of oil, thereby improve oil recovery.
Anti-swollen stablizer of the present invention has higher anti-swollen rate; can be applicable in every exploratory development operation in oil field; as the kill-job in drilling fluid, well finishing liquid and all kinds of well workover, operation kill-job, perforation completion, the formation testing process, acidization protection etc.; be the ideal operation liquid of protection hydrocarbon zone, have a extensive future.
The anti-production test of swollen stablizer through strong water-sensitive reservoir oil field, basin, Hailaer of the present invention proves, in the complicated underground environment of high temperature, high pressure, high salinity, still can keep outstanding anti-swollen stability, can prevent that sealing is moistening, can prevent that also oil is moistening, thereby guaranteed that the kapillary and the passage of infiltration transfer oil is forever unimpeded in the stratum, improve oil rate of permeation and stable recovery ratio, increased the output of oil.
Embodiment
Embodiment 1
Get the tensio-active agent that trade names are BH-2018 (Haozhi Chemical Co., Ltd., Daqing's product) 80kg, potassium alginate 5kg, KOH1kg, add in the seal-off pressure reactor down in normal temperature, normal pressure, start and stir, be warming up to 100 ℃ gradually, reacted 6 hours, be cooled to 25 ℃ then, add 14kg NH
4Cl stirred 0.5 hour, made clay anti-expension stabilizer 100kg of the present invention.
Embodiment 2
Getting trade names is the tensio-active agent 85kg of BH-2018, potassium alginate 5kg, and KOH1.5kg adds down in the seal-off pressure reactor in normal temperature, normal pressure, starts and stirs, and is warming up to 80 ℃ gradually, reacts 8 hours, is cooled to 25 ℃ then, adds 8.5kgNH
4Cl stirred 0.5 hour, made clay anti-expension stabilizer 100kg of the present invention.
Embodiment 3
Above-mentioned clay anti-expension stabilizer and oilfield reservoir compatibleness experiment (experimentation of embodiment 3～embodiment 5 and result provide by Exploration Development Inst., Daqing Oil Field Co Ltd. and Hulun Buir branch office of Daqing Oil Field Co., Ltd).Also used other 6 kinds anti-swollen stablizers in the experiment of embodiment 3-5, the purpose of this experiment is to optimize the anti-swollen stablizer of the ideal that can effectively stablize reservoir, estimates the compatibleness of this clay anti-expension stabilizer and reservoir.Its experimental arrangement is as follows: with find time saturated core and soaking 24 hours of local water, survey core local water rate of permeation then; Then in core, inject the 10 times of volume of voids of injection water (weight percentage of the anti-swollen stablizer of this experiment is 1.5%) that contain this anti-swollen stablizer, soaked 24 hours; Rate of permeation with this measured in solution core.
Experimental result sees Table 1, wherein injury rate=(rate of permeation of 1-core/core local water rate of permeation) * %.The injury rate is more little, and the compatibleness of anti-swollen stablizer and reservoir is good more.
Table 1. shellfish 3-5 well reservoir core is prevented swollen stablizer evaluating data table
Embodiment 4
The compatibleness experiment of this anti-swollen stablizer and local water:
The above-mentioned anti-swollen stablizer for preparing is mixed with the part by weight of local water by 1:1, act on 72 hours down, the results are shown in Table 2 at 50 ℃.
The compatibleness experimental result of anti-swollen stabiliser solution of table 2. and local water
| Expansion-resisting agent | Clay anti-expension stabilizer of the present invention |
| Compatibleness | Clearly |
As can be seen from Table 2, the compatibleness of clay anti-expension stabilizer of the present invention and local water is good.
Embodiment 5
The expansion-resisting agent displacement test:
Experiment purpose is the validity of analyzing in the long-term displacement process of expansion-resisting agent.Experimental result sees Table 3.
Table 3. is prevented swollen stablizer displacement evaluation experimental data sheet
| Rock sample | Local water rate of permeation (10 -3μm 2) | 30 times of rate of permeation (10 -3μ m 2) | 50 times of rate of permeation (10 -3μm 2) | 30 times of injury rates (%) | 50 times of injury rates (%) | |
| Clay anti-expension stabilizer of the present invention | 8-3 | 1.80 | 1.61 | 1.42 | 10.56 | 21.11 |
As can be seen from Table 3, clay anti-expension stabilizer of the present invention is little to the injury rate on stratum, has reached the purpose of protection reservoir.
Claims (2)
1, a kind of efficient multifunctional clay anti-expension stabilizer for injecting water is characterized in that by BH-2018 tensio-active agent, potassium alginate, KOH and NH
4Cl forms, and their weight percentage scope is respectively 70～85%, 5～20%, 1～5% and 5～15%.
2, the preparation method of the described clay anti-expension stabilizer of claim 1 is characterized in that taking by weighing BH-2018 tensio-active agent, potassium alginate, KOH and NH by the described weight percentage of claim 1
4Cl adds BH-2018 tensio-active agent, potassium alginate and KOH in the seal-off pressure reactor down in normal temperature, normal pressure earlier, starts and stirs, and is warming up to 60～100 ℃ gradually, reacts 0.5～20 hour, is cooled to 15～30 ℃ then, adds NH
4Cl continues to stir 0.5～1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100441940A CN100471928C (en) | 2006-05-18 | 2006-05-18 | Efficient multifunctional clay anti-expension stabilizer for injecting water and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100441940A CN100471928C (en) | 2006-05-18 | 2006-05-18 | Efficient multifunctional clay anti-expension stabilizer for injecting water and its production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101074364A CN101074364A (en) | 2007-11-21 |
| CN100471928C true CN100471928C (en) | 2009-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100441940A Expired - Fee Related CN100471928C (en) | 2006-05-18 | 2006-05-18 | Efficient multifunctional clay anti-expension stabilizer for injecting water and its production |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102086390B (en) * | 2009-12-02 | 2013-05-15 | 安东石油技术（集团）有限公司 | Solidfree well killing fluid for acidic oil-gas reservoir |
| CN103773328A (en) * | 2013-12-30 | 2014-05-07 | 大庆浩拓化工有限公司 | Clay anti-swelling stabilizer as well as preparation method and application thereof |
| CN105626017A (en) * | 2014-10-29 | 2016-06-01 | 中国石油化工股份有限公司 | Use method for steam injection clay anti-expansion agent accompanied injection of water-sensitive heavy oil well |
| CN104327818B (en) * | 2014-11-05 | 2017-03-08 | 青岛蓬勃石油技术服务有限公司 | Swollen clay stabilizer and preparation method thereof is prevented in the displacement of reservoir oil |
| CN112552885B (en) * | 2020-12-20 | 2023-03-17 | 西南石油大学 | Superhigh temperature resistant 180 ℃ tackifying type well completion fluid and workover fluid |
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2006
- 2006-05-18 CN CNB2006100441940A patent/CN100471928C/en not_active Expired - Fee Related
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| CN101074364A (en) | 2007-11-21 |
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Granted publication date: 20090325 Termination date: 20140518 |