CN104449601A - Coating inhibitor for drilling fluid as well as preparation method and application thereof - Google Patents
Coating inhibitor for drilling fluid as well as preparation method and application thereof Download PDFInfo
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- CN104449601A CN104449601A CN201410616938.6A CN201410616938A CN104449601A CN 104449601 A CN104449601 A CN 104449601A CN 201410616938 A CN201410616938 A CN 201410616938A CN 104449601 A CN104449601 A CN 104449601A
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- drilling fluid
- suppressed dose
- preparation
- bag
- dose
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/20—Natural organic compounds or derivatives thereof, e.g. polysaccharides or lignin derivatives
- C09K8/206—Derivatives of other natural products, e.g. cellulose, starch, sugars
Abstract
The invention provides a coating inhibitor for a drilling fluid as well as a preparation method and application thereof. The preparation method of the coating inhibitor comprises the following steps of: mixing a vegetable gelatin, anhydrous sodium carbonate, ethanol, water, glycerol, trimethylamine and epoxy chloropropane at a weight ratio of (240-260):(2.4-2.6):(750-1,000):(200-500):(5-10):(80-100):(400-440), and enabling the mixed system to react for 4.5-5 hours under the reflux condition to obtain the coating inhibitor. The coating inhibitor provided by the invention is a natural polymer strong coating inhibitor and has the advantages of strong coating inhibiting performance, strong salt and calcium resisting capacity, no biotoxicity and low cost, and in addition, the coating inhibitor can be biodegraded easily, is simple in synthesis method and is favorable for protecting the oil-gas layer.
Description
Technical field
The present invention relates to oil field drilling fluids bag suppressed dose and preparation method thereof and application, specifically refer to a kind of drilling fluid natural polymer being prepared by main raw material with natural plant wrap by force suppressed dose and preparation method thereof with application.
Background technology
Coating agent is a kind of important additives used in drilling fluid system; its effect is effectively wrapped by drilling cuttings, prevents drilling cuttings and shale hydration dispersion, prevent hole collapse; protective membrane can also be formed at drilling cuttings and shale surface, prevent drilling cuttings from mutually boning and increasing the resistance that sieves.
In recent years, related personnel develops all kinds of coating agent successively in the industry.Such as, CN101942060A discloses a kind of preparation method of drilling fluid environment-friendly type coating agent, and its monomer used is methacryloyl amine, acrylic amide, but this preparation method is more loaded down with trivial details.In addition, CN101775272A discloses a kind of cationic polymer coating agent and preparation method thereof, and its monomer used is N,N-DMAA class, acrylic amide, vinyl sulfonic acid etc.
Current domestic conventional drilling fluid bag suppressed dose of (coating agent) mainly water-soluble polyacrylate family macromolecule polymkeric substance.This base polymer residual monomer (as acrylamide, vinylformic acid, vinyl cyanide etc.) be toxic substance, can pollute after these residual monomer entered environments.In addition, the monomer price for the production of these polymer coating agents is higher, and the cost of polyreaction is also higher, thus causes the drilling fluid cost of this coating agent of use higher.
Therefore develop a kind of strong inhibition capability, active demand that saline-alkaline tolerance is strong, lifeless matter toxicity, synthetic method are simple, cost is low suppressed dose of bag is insider.
Summary of the invention
The drilling fluid natural polymer that an object of the present invention is to provide a kind of improvement wraps by force suppressed dose; make it while having suppression drilling cuttings dispersion aquation, preventing the fundamental propertys such as hole collapse; the pollution to environment can be reduced; reservoir protec-tion; strengthen anti-calcium and anti-salt ability, reduce synthesis cost.
Another object of the present invention is to the preparation method that suppressed dose of described bag is provided, its simple process, and suppressed dose of prepared bag has good performance.
Another object of the present invention is to the application that suppressed dose of described bag is provided.
Another object of the present invention is to provide a kind of drilling fluid, which are added described drilling fluid natural polymer and wrap by force suppressed dose.
For reaching above-mentioned purpose, on the one hand, the invention provides the preparation method of suppressed dose of a kind of drilling fluid bag, the method comprises:
By vegetable jelly, anhydrous sodium carbonate, ethanol, water, glycerol, Trimethylamine 99, epoxy chloropropane mixing, in mixed system, the mass ratio of vegetable jelly, anhydrous sodium carbonate, ethanol, water, glycerol, Trimethylamine 99 and epoxy chloropropane is 240 ~ 260:2.4 ~ 2.6:750 ~ 1000:200 ~ 500:5 ~ 10:80 ~ 100:400 ~ 440, this mixed system under reflux conditions reacts 4.5 ~ 5 hours, obtained suppressed dose of drilling fluid bag.
In preparation method of the present invention, in mixed system, the amount of each component is the gauge with active substance, when to prepare hybrid reaction system of the present invention each raw material used be not pure substance, should prepare burden according to wherein active substance actual concentrations after carrying out corresponding conversion.Such as, when the industrial 30% conventional trimethylamine aqueous solution of employing hybrid reaction system of the present invention as preparation of raw material, in mixed system, the amount " 80 ~ 100 " of Trimethylamine 99 refers to the actual significant quantity of Trimethylamine 99 component, but not the consumption (water in 30% trimethylamine aqueous solution should count in the amount " 200 ~ 500 " of water) of batching 30% trimethylamine aqueous solution.
In the present invention to the order by merging of each raw material without particular requirement, normally first vegetable jelly, ethanol are mixed with water, then add anhydrous sodium carbonate, glycerol, Trimethylamine 99 and epoxy chloropropane, obtain mixed system.To reaction pressure also without particular requirement, under normal pressure, carry out back flow reaction.
In preparation method of the present invention; reaction raw materials is cheap and easy to get; technique is simple; obtained reaction product can be used as suppressed dose of bag preparation drilling fluid; while there is suppression drilling cuttings dispersion aquation, preventing the fundamental propertys such as hole collapse; the pollution to environment can be reduced, reservoir protec-tion, strengthen anti-calcium and anti-salt ability.
According to the specific embodiment of the present invention, the preparation method of suppressed dose of drilling fluid bag of the present invention also comprises:
React from reflux conditions in the reactant after 4.5 ~ 5 hours and isolate solid particulate matter, and at 80 ~ 110 DEG C, dry 5 ~ 8 hours (removing the residual water-content in isolated solid particulate matter and ethanol) is carried out to it, obtain suppressed dose dry of drilling fluid bag.
According to the specific embodiment of the present invention, in the preparation method of suppressed dose of described drilling fluid bag, described vegetable jelly is selected from one or more in konjak gum, sesbania gum, Trigonella foenum-graecum glue.
On the other hand, the invention provides suppressed dose of a kind of drilling fluid bag, it prepares according to preparation method of the present invention.
According to the specific embodiment of the present invention, suppressed dose of drilling fluid bag of the present invention has following physical property:
Product of the present invention is free-pouring white particle or powder.Apparent viscosity in distilled water is 30 ~ 50mPa.S, and the apparent viscosity in distilled water and 20% salt solution is 10 ~ 30mPa.S, and the apparent viscosity in distilled water, 20% salt solution and 5% sodium soil is 10 ~ 30mPa.S, EC
50value is 100000 ~ 125000mg/L.
Suppressed dose of bag of the present invention can be used as additive and adds in drilling fluid, can improve or strengthen the correlated performance of drilling fluid, therefore present invention also offers suppressed dose of described bag as the application of additive in preparation drilling fluid.
On the other hand, the invention provides a kind of drilling fluid, wherein with the addition of suppressed dose of drilling fluid of the present invention bag.
According to drilling fluid of the present invention, wherein, it is 0.1 ~ 0.8wt% that described drilling fluid natural polymer wraps by force the suppressed dose of addition in drilling fluid, preferred 0.3wt%.
In sum, the invention provides a kind of drilling fluid natural polymer and wrap by force suppressed dose and preparation method thereof with application and apply the drilling fluid obtained.The drilling fluid natural polymer obtained by the present invention wraps by force suppressed dose and has following beneficial effect: it can suppress drilling cuttings and Shale Hydration to disperse; prevent hole collapse; anti-calcium and anti-salt ability is strong; lifeless matter toxicity, environmentally safe, compared with prior art; there is readily biodegradable; good reservoir protec-tion performance, synthetic method is simple, low cost and other advantages.
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and beneficial effect, now in conjunction with specific examples, following detailed description is carried out to technical scheme of the present invention, the technique means that the present invention does not describe is undertaken by usual manner in this area, should understand these examples and only be not used in for illustration of the present invention and limit the scope of the invention.
Embodiment 1
Getting 250 parts of konjak gums is by weight dissolved in the mixing solutions of 900 part of 95% ethanol and 220 parts of water, add 2.4 parts of anhydrous sodium carbonates, 6 parts of glycerol, 280 part of 30% Trimethylamine 99 and 420 parts of epoxy chloropropane again in reactor, react 4.5 hours under reflux condensation mode condition, centrifuge half an hour, isolate solid particulate, drying 7 hours at 100 DEG C, the drilling fluid natural polymer obtaining the present embodiment wraps by force suppressed dose.
Embodiment 2
Getting 260 parts of sesbania gums is by weight dissolved in the mixing solutions of 1000 part of 95% ethanol and 230 parts of water, add 2.5 parts of anhydrous sodium carbonates, 8 parts of glycerol, 290 part of 30% Trimethylamine 99 and 410 parts of epoxy chloropropane again in reactor, react 5 hours under reflux condensation mode condition, centrifuge half an hour, isolate solid particulate, drying 8 hours at 90 DEG C, the drilling fluid natural polymer obtaining the present embodiment wraps by force suppressed dose.
Embodiment 3
Get 240 parts of Trigonella foenum-graecum peptizations by weight in the mixing solutions of 900 part of 95% ethanol and 240 parts of water, add 2.6 parts of anhydrous sodium carbonates, 9 parts of glycerol, 300 part of 30% Trimethylamine 99 and 430 parts of epoxy chloropropane again in reactor, react 4.5 hours under reflux condensation mode condition, centrifuge half an hour, isolate solid particulate, drying 6 hours at 105 DEG C, the drilling fluid natural polymer obtaining the present embodiment wraps by force suppressed dose.
Embodiment 4
Getting 260 parts of konjak gums is by weight dissolved in the mixing solutions of 1000 part of 95% ethanol and 210 parts of water, add 2.6 parts of anhydrous sodium carbonates, 10 parts of glycerol, 290 part of 30% Trimethylamine 99 and 440 parts of epoxy chloropropane again in reactor, react 5 hours under reflux condensation mode condition, centrifuge half an hour, isolate solid particulate, drying 7 hours at 110 DEG C, the drilling fluid natural polymer obtaining the present embodiment wraps by force suppressed dose.
Embodiment 5
Getting 240 parts of sesbania gums is by weight dissolved in the mixing solutions of 800 part of 95% ethanol and 240 parts of water, add 2.4 parts of anhydrous sodium carbonates, 5 parts of glycerol, 280 part of 30% Trimethylamine 99 and 400 parts of epoxy chloropropane again in reactor, react 5 hours under reflux condensation mode condition, centrifuge half an hour, isolate solid particulate, drying 7.5 hours at 95 DEG C, the drilling fluid natural polymer obtaining the present embodiment wraps by force suppressed dose.
The various embodiments described above product is carried out properties test, testing method with reference to company standard Q/HDJPK0009-2014 (viscosity data be by the product of each embodiment according to 1.2% mass concentration join in distilled water, distilled water+20% salt solution and distilled water+20% salt solution+5% sodium soil respectively, measure apparent viscosity), environmental-protecting performance evaluates the oppossum shrimp bio-toxicity grade scale confirmed with reference to EPA, uses DXY-2 Biological Acute Toxicity tester to test.Result is as shown in table 1.
Table 1 embodiment 1 ~ 5 products obtained therefrom property indices test data
Note: EC
50: the concentration in parameter in bio kinetic model during half maximum effect.
Test result shows, the drilling fluid natural polymer adopting the present invention to obtain wraps by force suppressed dose, and have the ability of stronger suppression drilling cuttings aquation dispersion, prevent hole collapse, saline-alkaline tolerance is strong, lifeless matter toxicity, environmentally safe.
Become by the various embodiments described above product configuration drilling fluid to starch and carry out performance evaluation.
(1) heat-resisting property evaluation
The drilling fluid natural polymer obtained in embodiment 1 ~ 5 is wrapped by force suppressed dose be mixed with drilling fluid slurry be numbered I, II, III, IV, V respectively in the lump, carry out 140 DEG C of heat to roll after 16 hours and carry out following performance test, the formula wherein starching is 4% bentonite slurry+0.3%Na
2cO
3+ 0.3% coating agent+2.5%NAT20+3%NFA-25+1%PGCS-1, result is as shown in table 2.
A performance after 140 DEG C of heat roll 16 hours starched by table 2
Can be found out by above data, natural polymer drilling fluids heat-resisting property is good, and after high-temperature hot is rolled, rheological is good, in normal temperature pressure and high temperature and high pre ssure filtration all very little, drilling engineering needs can be met.
(2) antifouling property
The drilling fluid natural polymer obtained in embodiment 1 ~ 5 is wrapped by force suppressed dose be mixed with drilling fluid slurry two and be numbered 1,2,3,4,5 respectively, carry out 140 DEG C of heat to roll after 16 hours and carry out following performance test, the formula wherein starching two is 4% bentonite slurry+0.3%Na
2cO
3+ 0.3% coating agent+3%NAT20+2.5%NFA-25+1.5%PGCS-1+35%NaCl+1% gypsum, result is as shown in table 3:
Table 3 is starched 2 140 DEG C of heat and is rolled the performance after 16 hours
Can be found out by data in table 3, natural polymer drilling fluids is strong by strong bag suppressed dose of anti-calcium and anti-salt ability, and after saturated salt and 1% gypsum are polluted, performance still keeps good.
Abbreviation of the present invention represents following meaning:
NFA-25: commercially available drilling fluid anti-sloughing agent unstressed configuration albino bitumen;
PGCS-1: commercially available drilling fluid solid polymerization alcohol;
NAT20: commercially available fluid loss additive for boring fluid;
ρ: density;
AV: apparent viscosity;
PV: plastic viscosity;
YP: yield value;
G10 ": ingress;
G10 ': egress;
API: press filtration vector in normal temperature;
HTHP: high temperature and high pre ssure filtration.
(3) inhibition evaluation
The coating agent obtain each embodiment and polyacrylamide (PAM), polyacrylamide sylvite (K-PAM) are mixed with the solution of same concentrations, and in different time build-in test swell incremenies, its result is as shown in table 4.
Table 4 coating agent, PAM and the K-PAM shale expansion amount in different time
Data in table 4 all record by following testing method:
Take at 105 DEG C ± 3 DEG C, dry 4h sample 0.6g (claim accurate to 0.01g) in beaker, add till 200mL distilled water is stirred to and all dissolves on magnetic stirrer;
Take the drilling fluid secondary wilkinite 10g (title is accurate to 0.01g) of drying at 105 DEG C ± 3 DEG C to load and survey in cylinder, and stopper rod is inserted survey cylinder, under pressure 4MPa, keep 5min, obtained test core;
The survey cylinder with rock core is arranged on NP-01 shale expansion tester, distilled water is injected and surveys cylinder, after making its soak test rock core 8h, write down the polar expansion amount of rock core.The polar expansion amount of rock core should be greater than 14.0mm, otherwise should adjust or change the wilkinite preparing rock core;
Be arranged on by the survey cylinder with rock core on NP-01 shale expansion tester, sample solution injected and surveys cylinder, record the polar expansion amount of 1 ~ 8h respectively, every 1h record once.
Data as can be seen from table 4, compared with other inhibitor, under the condition that concentration is identical, product drilling fluid coating agent swell increment of the present invention is minimum, and namely its inhibition is the strongest.
Claims (9)
1. a preparation method for suppressed dose of drilling fluid bag, the method comprises:
By vegetable jelly, anhydrous sodium carbonate, ethanol, water, glycerol, Trimethylamine 99, epoxy chloropropane mixing, in mixed system, the part by weight of vegetable jelly, anhydrous sodium carbonate, ethanol, water, glycerol, Trimethylamine 99 and epoxy chloropropane is 240 ~ 260:2.4 ~ 2.6:750 ~ 1000:200 ~ 500:5 ~ 10:80 ~ 100:400 ~ 440, this mixed system under reflux conditions reacts 4.5 ~ 5 hours, obtained suppressed dose of drilling fluid bag.
2. method according to claim 1, wherein, is first mix vegetable jelly, ethanol with water, then add anhydrous sodium carbonate, glycerol, Trimethylamine 99 and epoxy chloropropane, obtains mixed system.
3. method according to claim 1, the method also comprises:
React in the reactant after 4.5 ~ 5 hours from reflux conditions and isolate solid particulate matter, and at 80 ~ 110 DEG C dry 5 ~ 8 hours, obtain dry drilling fluid and wrap suppressed dose.
4. method according to claim 1, wherein, described vegetable jelly is selected from one or more in konjak gum, sesbania gum, Trigonella foenum-graecum glue.
5. a drilling fluid wraps suppressed dose, and it prepares according to the method described in any one of Claims 1 to 4.
6. suppressed dose of drilling fluid bag according to claim 5, it has following characteristic:
Apparent viscosity in distilled water is 30 ~ 50mPa.S, and the apparent viscosity in distilled water and 20% salt solution is 10 ~ 30mPa.S, and the apparent viscosity in distilled water, 20% salt solution and 5% sodium soil is 10 ~ 30mPa.S, EC
50value is 100000 ~ 125000mg/L.
7. suppressed dose of drilling fluid bag described in claim 5 or 6 is as the application of additive in preparation drilling fluid.
8. a drilling fluid, wherein with the addition of suppressed dose of bag described in claim 5 or 6.
9. drilling fluid according to claim 8, wherein, the addition of suppressed dose of described bag in drilling fluid is 0.1 ~ 0.8wt%.
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| CN201410616938.6A CN104449601B (en) | 2014-11-05 | 2014-11-05 | Suppressed dose of drilling fluid bag and preparation method thereof and application |
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| CN104449601B CN104449601B (en) | 2016-03-23 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014200A (en) * | 2016-05-20 | 2016-10-12 | 中国石油集团渤海钻探工程有限公司 | Well drilling method for penetrating gypsum horizon |
| CN106833558A (en) * | 2016-12-30 | 2017-06-13 | 戴琪 | A kind of preparation method of fast molten low viscosity type drilling fluid coating agent |
| CN109294532A (en) * | 2018-09-06 | 2019-02-01 | 中国海洋石油集团有限公司 | A kind of novel environment friendly high-performance coating inhibitor and its preparation method and application |
| CN110358511A (en) * | 2019-08-17 | 2019-10-22 | 石家庄华莱鼎盛科技有限公司 | Drilling fluid coating agent polymeric hardener resin |
| CN110511310A (en) * | 2019-09-04 | 2019-11-29 | 大庆华营化工有限公司 | A kind of preparation method of drilling fluid coating agent |
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| CN103484085A (en) * | 2013-09-18 | 2014-01-01 | 新疆贝肯能源工程股份有限公司 | Instant strong coating inhibitor for drilling fluid and preparation method of strong coating inhibitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106014200A (en) * | 2016-05-20 | 2016-10-12 | 中国石油集团渤海钻探工程有限公司 | Well drilling method for penetrating gypsum horizon |
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| CN109294532A (en) * | 2018-09-06 | 2019-02-01 | 中国海洋石油集团有限公司 | A kind of novel environment friendly high-performance coating inhibitor and its preparation method and application |
| CN109294532B (en) * | 2018-09-06 | 2021-01-29 | 中国海洋石油集团有限公司 | Environment-friendly high-performance coating inhibitor and preparation method and application thereof |
| CN110358511A (en) * | 2019-08-17 | 2019-10-22 | 石家庄华莱鼎盛科技有限公司 | Drilling fluid coating agent polymeric hardener resin |
| CN110358511B (en) * | 2019-08-17 | 2020-09-08 | 石家庄华莱鼎盛科技有限公司 | Coating agent high-molecular cured resin for drilling fluid |
| CN110511310A (en) * | 2019-09-04 | 2019-11-29 | 大庆华营化工有限公司 | A kind of preparation method of drilling fluid coating agent |
| CN110511310B (en) * | 2019-09-04 | 2021-08-20 | 大庆华营化工有限公司 | Preparation method of coating agent for drilling fluid |
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