CN114456791B - Deep water oil-gas field liquid foam discharging agent and production process thereof - Google Patents
Deep water oil-gas field liquid foam discharging agent and production process thereof Download PDFInfo
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Abstract
The invention provides a deep water oil-gas field liquid foam discharging agent and a production process thereof, wherein the foam discharging agent consists of 3-5 parts of foam discharging main agent A, 1-3 parts of nonionic surfactant, 1-3 parts of zwitterionic surfactant, 0.1-0.5 part of foam stabilizer, 10-20 parts of antifreeze agent and 100 parts of water, and the preparation method of the foam discharging main agent A comprises the following steps: placing diethylenetriamine polyoxyethylene polyoxypropylene ether into a reaction kettle, heating to 40-50 ℃, dropwise adding a 20wt% sodium chloroacetate aqueous solution into the reaction kettle for 1-2h, controlling the temperature of the reaction kettle at 50-70 ℃ after dropwise adding, reacting for 1-3h, adding a 10wt% gamma-aminopropyl triethoxysilane glycol solution into the reaction kettle, stirring and reacting for 2-3h at normal temperature of 20-25 ℃, and finally obtaining the foam discharging main agent A. The foam discharging agent has the advantages of strong foaming and liquid carrying capacity, excellent cleanliness, good low temperature resistance and fluidity, meets the requirement of umbilical cable filling, and is particularly suitable for auxiliary yield increase of deep sea oil wells.
Description
Technical Field
The invention relates to the technical field of oil and gas field chemical auxiliary agents, in particular to a deep water oil and gas field liquid foam discharging agent and a production process thereof.
Background
Deep sea contains abundant oil and gas resources, and with the increasing demand of human beings for oil and gas, the development of deep sea oil and gas fields is receiving more and more attention. The deep sea oil-gas field is the key development and exploitation direction of the offshore oil field at present, along with continuous development and exploitation, partial early developed deep sea oil-gas wells meet water, the pressure is gradually reduced, the liquid carrying capacity is reduced, and the oil-gas wells are reduced in yield and even stopped in blowout. There is a great need to study the foam discharging agent for deep sea oil and gas fields, so as to achieve the aims of increasing and stabilizing yield and ensure national energy safety.
Compared with the traditional foam discharging agent applied to shallow water and land, the deep water environment agent is filled by adopting an umbilical cable, the filling pipeline is slender, the detention time in the pipeline is long, and the application temperature range is between-10 ℃ and 150 ℃. Therefore, besides foaming capacity and liquid carrying capacity, the foaming agent has strict requirements on low temperature resistance, cleanliness and viscosity of the product.
Disclosure of Invention
The invention overcomes the defects in the prior art, the foam discharging agent used in the deepwater environment needs to be filled by adopting an umbilical cable, a filling pipeline is slender, the foam discharging agent has long retention time in the pipeline and large temperature range during application, so that the foam discharging agent has strict requirements on low temperature resistance, cleanliness and viscosity besides the foaming capacity and liquid carrying capacity of the foam discharging agent, and the invention provides the liquid foam discharging agent for the deepwater oil and gas field and the production process thereof.
The aim of the invention is achieved by the following technical scheme.
A deep water oil-gas field liquid foam discharging agent comprises the following components in parts by weight:
the preparation method of the foam discharging main agent A comprises the following steps: placing diethylenetriamine polyoxyethylene polyoxypropylene ether into a reaction kettle, heating to 40-50 ℃, dropwise adding a 20wt% sodium chloroacetate aqueous solution into the reaction kettle for 1-2h, controlling the temperature of the reaction kettle at 50-70 ℃ after dropwise adding, reacting for 1-3h, adding a 10wt% gamma-aminopropyl triethoxysilane glycol solution into the reaction kettle, stirring and reacting for 2-3h at normal temperature of 20-25 ℃, and finally obtaining a foam discharging main agent A, wherein the mass ratio of the diethylenetriamine polyoxyethylene polyoxypropylene ether to the 20wt% sodium chloroacetate aqueous solution is (1-4): the mass fraction of the 1, 10wt% gamma-aminopropyl triethoxysilane glycol solution accounting for 20wt% sodium chloroacetate aqueous solution is 1-10%.
The structural general formula of the diethylenetriamine polyoxyethylene polyoxypropylene ether is as follows:
wherein the molecular weight of the diethylenetriamine polyoxyethylene polyoxypropylene ether is 2000-3000g/mol, and in the structural general formula, X is Y=1 (3-6).
The nonionic surfactant is one or more of alkylphenol ethoxylates (OP-10), tween 60, octyl grape anhydride and ethyl grape anhydride.
The zwitterionic surfactant adopts one or more of cocoamidopropyl sulfobetaine, octyl dimethyl betaine, dodecyl sulfopropyl betaine, decane dimethyl amine oxide and octane amidopropyl dimethyl amine oxide.
The foam stabilizer adopts polyethylene glycol (200) or polyethylene glycol (400).
The antifreeze agent adopts one or more of methanol, ethanol and glycol.
The production process of the deep water oil and gas field liquid foam discharging agent comprises the following steps:
step 1, placing diethylenetriamine polyoxyethylene polyoxypropylene ether into a reaction kettle, heating to 40-50 ℃, dropwise adding a 20wt% sodium chloroacetate aqueous solution into the reaction kettle for 1-2h, controlling the temperature of the reaction kettle at 50-70 ℃ after dropwise adding, reacting for 1-3h, adding a 10wt% gamma-aminopropyl triethoxysilane glycol solution into the reaction kettle, stirring and reacting for 2-3h at normal temperature of 20-25 ℃, and finally obtaining a foam discharging main agent A, wherein the mass ratio of the diethylenetriamine polyoxyethylene polyoxypropylene ether to the 20wt% sodium chloroacetate aqueous solution is (1-4): 1 to 10 weight percent of gamma-aminopropyl triethoxysilane glycol solution accounts for 1 to 10 weight percent of 20 weight percent of sodium chloroacetate aqueous solution;
step 2, pumping 3-5 parts of the foam discharging main agent A prepared in the step 1, 100 parts of water, 1-3 parts of nonionic surfactant, 1-3 parts of zwitterionic surfactant, 0.1-0.5 part of foam stabilizer and 10-20 parts of antifreeze agent into a reaction kettle, and stirring and mixing uniformly to obtain a liquid foam discharging agent mixture;
and 3, filtering the liquid foam discharging agent mixture prepared in the step 2 by adopting a 0.5 micron filter screen for more than 2 times, sampling and performing cleanliness test, if the cleanliness is detected to be more than 8, repeatedly filtering the liquid foam discharging agent mixture by using the 0.5 micron filter screen again until the cleanliness of the product is less than 8, and finally preparing the liquid foam discharging agent of the deepwater oil-gas field.
The structural general formula of the diethylenetriamine polyoxyethylene polyoxypropylene ether is as follows:
wherein the molecular weight of the diethylenetriamine polyoxyethylene polyoxypropylene ether is 2000-3000g/mol, and in the structural general formula, X is Y=1 (3-6).
The nonionic surfactant is one or more of alkylphenol ethoxylates (OP-10), tween 60, octyl grape anhydride and ethyl grape anhydride.
The zwitterionic surfactant adopts one or more of cocoamidopropyl sulfobetaine, octyl dimethyl betaine, dodecyl sulfopropyl betaine, decane dimethyl amine oxide and octane amidopropyl dimethyl amine oxide.
The foam stabilizer adopts polyethylene glycol (200) or polyethylene glycol (400).
The antifreeze agent adopts one or more of methanol, ethanol and glycol.
The beneficial effects of the invention are as follows: compared with the traditional foam discharging agent applied to shallow water and land, the foam discharging agent for the liquid in the deep water oil-gas field has the characteristics of low viscosity, high cleanliness, low temperature resistance and strong foaming and liquid carrying capacity, and is suitable for being filled in a deep sea high condensate oil-gas well for producing water and oil. The foam discharging agent has the characteristics of easily available raw materials, low toxicity and easy degradation, and is beneficial to the large-scale application of a gas well on site.
Drawings
Fig. 1 is a front-to-back comparison curve of slug flow trap airflow.
Detailed Description
The technical scheme of the invention is further described by specific examples.
The information on the reagents used in the examples below is shown below:
the diethylenetriamine polyoxyethylene polyoxypropylene ether is self-made by a company, sodium chloroacetate, gamma-aminopropyl triethoxysilane, ethylene glycol, alkylphenol ethoxylates (OP-10), tween 60, octyldecyl grape anhydride, ethyl grape anhydride, cocoamidopropyl sulfobetaine, octyl dimethyl betaine, dodecyl sulfopropyl betaine, decaneyl dimethyl amine oxide, octane amidopropyl dimethyl amine oxide, polyethylene glycol (200), polyethylene glycol (400), methanol, ethanol and ethylene glycol are provided as maya reagent by manufacturers.
Example 1:
based on the synthesis of a liquid foam discharging agent of an offshore deep water oil and gas field, 100 parts of water and 3 parts of foam discharging main agent A;1 part of nonionic surfactant, 1 part of zwitterionic surfactant, 0.1 part of foam stabilizer and 10 parts of antifreeze agent, and the synthesis steps are as follows:
(1) Firstly, adding 100g of diethylenetriamine polyoxyethylene polyoxypropylene ether into a reaction kettle, heating to 40 ℃, dropwise adding 100g of prepared 20wt% sodium chloroacetate aqueous solution for 1h, and controlling the temperature to react at 50 ℃ for 1h after the dropwise adding is finished. Then adding 1g of gamma-aminopropyl triethoxysilane glycol solution, stirring at normal temperature, and reacting for 2h to obtain a deep water foam main agent A;
(2) 3 parts of the foam discharging main agent A prepared in the step (1), 100 parts of water, 0.5 part of alkylphenol ethoxylate (OP-10), 0.5 part of tween 60,0.5 part of cocamidopropyl sulfobetaine, 0.5 part of octyl dimethyl betaine, 0.1 part of polyethylene glycol (200) and 10 parts of methanol are pumped into a reaction kettle, and stirred and mixed uniformly;
(3) Filtering with 0.5 micron filter screen for 3 times to obtain the liquid foam discharging agent for deep water oil and gas field.
Example 2:
based on the synthesis of a liquid foam discharging agent of an offshore deep water oil and gas field, 100 parts of water and 5 parts of foam discharging main agent A;3 parts of nonionic surfactant, 3 parts of amphoteric surfactant, 0.5 part of foam stabilizer and 20 parts of antifreeze agent, and the synthesis steps are as follows:
(1) Firstly, 100g of diethylenetriamine polyoxyethylene polyoxypropylene ether is added into a reaction kettle, the temperature is raised to 50 ℃, 25g of prepared 20wt% sodium chloroacetate aqueous solution is added dropwise for 1.5h, and the temperature is controlled to be 60 ℃ for reaction for 3h after the dropwise addition is completed. Then adding 2.5g of 10wt% gamma-aminopropyl triethoxysilane glycol solution, stirring at normal temperature for reaction for 3 hours to prepare a deep water foam discharging main agent A;
(2) Pumping 5 parts of the foam discharging main agent A prepared in the step (1), 100 parts of water, 1 part of tween 60, 1 part of octyl decyl grape anhydride, 1 part of ethyl grape anhydride, 1 part of dodecyl sulfopropyl betaine, 1 part of decane dimethyl amine oxide, 1 part of octanamide propyl dimethyl amine oxide, 0.5 part of polyethylene glycol (400), 10 parts of methanol and 10 parts of ethylene glycol into a reaction kettle, and stirring and mixing uniformly;
(3) Filtering by adopting a 0.5 micron filter screen for 4 times to obtain the deep water oil and gas field liquid foam discharging agent.
Example 3:
based on the synthesis of a liquid foam discharging agent of an offshore deep water oil and gas field, 100 parts of water and 4 parts of foam discharging main agent A;2 parts of nonionic surfactant, 2 parts of amphoteric surfactant, 0.4 part of foam stabilizer and 15 parts of antifreeze agent, and the synthesis steps are as follows:
(1) Firstly, 100g of diethylenetriamine polyoxyethylene polyoxypropylene ether is added into a reaction kettle, the temperature is raised to 50 ℃, 50g of prepared 20wt% sodium chloroacetate aqueous solution is added dropwise for 2 hours, and the temperature is controlled to be 70 ℃ for 2 hours after the dropwise addition is completed. Then adding 2.5g of 10wt% gamma-aminopropyl triethoxysilane glycol solution, stirring at normal temperature for 2.5h to prepare a deep water foam main agent A;
(2) Pumping 4 parts of the foam discharging main agent A prepared in the step (1), 100 parts of water, 2 parts of alkylphenol ethoxylates (OP-10), 1 part of dodecyl sulfopropyl betaine, 1 part of octane amide propyl dimethyl amine oxide, 0.4 part of polyethylene glycol (200), 10 parts of methanol, 5 parts of ethanol and 5 parts of ethylene glycol into a reaction kettle, and stirring and mixing uniformly;
(3) Filtering with 0.5 micron filter screen for 3 times to obtain the liquid foam discharging agent for deep water oil and gas field.
Example 4:
based on the synthesis of a liquid foam discharging agent of an offshore deep water oil and gas field, 100 parts of water and 5 parts of foam discharging main agent A;2 parts of nonionic surfactant, 1 part of zwitterionic surfactant, 0.1 part of foam stabilizer and 15 parts of antifreeze agent, and the synthesis steps are as follows:
(1) 150g of diethylenetriamine polyoxyethylene polyoxypropylene ether is added into a reaction kettle, the temperature is raised to 45 ℃, 50g of prepared 20wt% sodium chloroacetate aqueous solution is added dropwise for 2 hours, and the temperature is controlled to be 70 ℃ for 2 hours after the dropwise addition is completed. Then adding 3g of 10wt% gamma-aminopropyl triethoxysilane glycol solution, stirring at normal temperature for 2.5h to prepare a deep water foam discharging main agent A;
(2) Pumping 5 parts of the foam discharging main agent A prepared in the step (1), 100 parts of water, 2 parts of ethyl grape anhydride, 0.5 part of dodecyl sulfopropyl betaine, 0.5 part of decane dimethyl amine oxide and 0.1 part of polyethylene glycol (400), and 15 parts of ethylene glycol into a reaction kettle, and stirring and mixing uniformly;
(3) Filtering by adopting a 0.5-micrometer filter screen for 5 times to obtain the deep water oil-gas field liquid foam discharging agent.
Example 5:
based on the synthesis of a liquid foam discharging agent of an offshore deep water oil and gas field, 100 parts of water and 4 parts of foam discharging main agent A;1 part of nonionic surfactant, 1 part of zwitterionic surfactant, 0.2 part of foam stabilizer and 18 parts of antifreeze agent, and the synthesis steps are as follows:
(1) 150g of diethylenetriamine polyoxyethylene polyoxypropylene ether is added into a reaction kettle, the temperature is raised to 40 ℃, 50g of prepared 20wt% sodium chloroacetate aqueous solution is added dropwise for 1h, and the temperature is controlled to be 60 ℃ for reaction for 3h after the dropwise addition is completed. Then adding 5g of 10wt% gamma-aminopropyl triethoxysilane glycol solution, stirring at normal temperature for reaction for 3 hours to prepare a deep water foam main agent A;
(2) Pumping 4 parts of the foam discharging main agent A prepared in the step (1), 100 parts of water, 0.5 part of polyoxyethylene ether (OP-10), 0.5 part of octyl decyl grape anhydride, 0.5 part of dodecyl sulfopropyl betaine, 0.5 part of decane dimethyl amine oxide, 0.2 part of polyethylene glycol (200) and 18 parts of methanol into a reaction kettle, and stirring and mixing uniformly;
(3) Filtering by adopting a 0.5 micron filter screen for 4 times to obtain the deep water oil and gas field liquid foam discharging agent. Test example 1:
the foaming capacity, half-life of foam and liquid carrying capacity of the foam discharging agent prepared in the above examples 1 to 5 and 2 commercially available foam discharging agents were measured as follows:
foaming ability test: 170mL of field water of the deep water gas field in south China sea and 30mL of field condensate are adopted to prepare foaming liquid, the foaming liquid is preheated to 80 ℃, and the mass concentration of the foam discharging agent is 0.5%. The foam height and half life were monitored using a WARING high speed stirrer at 5000rpm for 1min at high speed, and the foaming capacity of the foam discharging agent was compared.
Liquid carrying capacity detection: 170mL of field water of the deep water gas field in south China sea and 30mL of field oil are adopted to prepare foaming liquid, the mass concentration of the foam discharging agent is 0.5%, and the foaming liquid is preheated to 80 ℃. With reference to SY/T6465-2000 Standard of foamer evaluation method for foam drainage and gas production, a self-developed foam liquid carrying instrument is adopted for detection, nitrogen is pumped into an evaluation device at a speed of 5L/min, and the liquid carrying amount of 15min is collected and recorded.
The test results are shown in table 1 below:
table 1 table for indoor Performance test data
From the test data in table 1 above, it can be seen that the present invention has better foaming ability for the deep water field production fluid in south China sea than the commercial foam discharging agent, and the generated foam has longer half-life. The liquid carrying amount is also obviously superfluous to the commercially available foam discharging agent product.
Test example 2:
the foam discharging agent prepared in the above examples 1 to 5 and 2 commercially available foam discharging agents were tested for low temperature resistance, normal temperature/low temperature cleanliness, normal temperature/low temperature viscosity, and the test method was as follows:
low temperature resistance test: taking more than 500mL of sample to be tested, sealing in a reagent bottle, performing a low temperature resistance test for 24 hours at the temperature of minus 10 ℃, monitoring the state of the product, and determining the low temperature resistance of the product.
And (3) detecting normal temperature/low temperature cleanliness: referring to the requirements of the American national aviation Standard for cleanliness (NAS 1638-2011), samples placed at the normal temperature of 25 ℃ and the low temperature of-10 ℃ are subjected to cleanliness test by a Rogowski KT-3 liquid particle tester.
And (3) normal temperature/low temperature viscosity detection: the viscosity of the paint 4 of the sample at room temperature 25℃and at a low temperature of-10℃was measured by referring to the GB/T1723 paint viscosity measurement method.
The test results are shown in table 2 below:
table 2 indoor physicochemical test data table
As shown in the detection data of the table 2, the foam discharging agent prepared by the invention has good low temperature resistance, low viscosity at normal temperature and low temperature, good fluidity and lower cleanliness than NAS 8 at normal/low temperature, and meets the filling requirement of the deep water umbilical cable. And the commercially available foam discharging agent has poor cleanliness and does not meet the requirements.
Test example 3:
the product disclosed by the patent is applied to a certain deep water oil-gas field in the south China sea. Before the medicament is filled, the gas yield continuously drops on site, the pressure is reduced from 15.38mPa to 14.3mPa, the gas well intermittently carries out water production, the gas flow of the slug flow catcher is unstable, and the incoming gas is zero for many times, so that the incoming gas is extremely unstable.
After 0.2% of the foam discharging agent prepared by the method is filled in a continuous filling mode, the flow of the slug flow catcher is stable and the slug flow is stable under the condition that the production system is not changed. The front and rear slug flow catcher air flow curves are shown in fig. 1 below.
As can be seen from FIG. 1, compared with the commercially available foam discharging agent product, the foam discharging agent has the characteristics of low viscosity, high cleanliness, low temperature resistance and strong foaming and liquid carrying capacity, and is suitable for filling umbilical cables into deep sea high condensate oil-water-producing oil-gas wells. The method has good application effect in the deep water oil-gas field in the south sea, and is beneficial to the large-scale application of the field gas well.
The foregoing has described exemplary embodiments of the invention, it being understood that any simple variations, modifications, or other equivalent arrangements which would not unduly obscure the invention may be made by those skilled in the art without departing from the spirit of the invention.
Claims (9)
1. A deep water oil-gas field liquid foam discharging agent is characterized in that: the foam discharging agent comprises the following components in parts by weight:
the preparation method of the foam discharging main agent A comprises the following steps: placing diethylenetriamine polyoxyethylene polyoxypropylene ether into a reaction kettle, heating to 40-50 ℃, dropwise adding a 20wt% sodium chloroacetate aqueous solution into the reaction kettle for 1-2h, controlling the temperature of the reaction kettle at 50-70 ℃ after dropwise adding, reacting for 1-3h, adding a 10wt% gamma-aminopropyl triethoxysilane glycol solution into the reaction kettle, stirring and reacting for 2-3h at normal temperature of 20-25 ℃, and finally obtaining a foam discharging main agent A, wherein the mass ratio of the diethylenetriamine polyoxyethylene polyoxypropylene ether to the 20wt% sodium chloroacetate aqueous solution is (1-4): the mass fraction of the 1, 10wt% gamma-aminopropyl triethoxysilane glycol solution accounting for 20wt% sodium chloroacetate aqueous solution is 1-10%.
2. The deepwater oil and gas field liquid foam discharging agent according to claim 1, wherein: the structural general formula of the diethylenetriamine polyoxyethylene polyoxypropylene ether is as follows:
wherein the molecular weight of the diethylenetriamine polyoxyethylene polyoxypropylene ether is 2000-3000g/mol, and in the structural general formula, X is Y=1 (3-6).
3. The deepwater oil and gas field liquid foam discharging agent according to claim 1, wherein: the nonionic surfactant is one or more of alkylphenol ethoxylates, tween 60, octyldecyl grape anhydride and ethyl grape anhydride; the zwitterionic surfactant adopts one or more of cocoamidopropyl sulfobetaine, octyl dimethyl betaine, dodecyl sulfopropyl betaine, decane dimethyl amine oxide and octane amidopropyl dimethyl amine oxide.
4. The deepwater oil and gas field liquid foam discharging agent according to claim 1, wherein: the foam stabilizer adopts polyethylene glycol 200 or polyethylene glycol 400; the antifreeze agent adopts one or more of methanol, ethanol and glycol.
5. A process for producing a deep water oil and gas field liquid foam discharging agent as defined in any one of claims 1 to 4, wherein: the method comprises the following steps of:
step 1, placing diethylenetriamine polyoxyethylene polyoxypropylene ether into a reaction kettle, heating to 40-50 ℃, dropwise adding a 20wt% sodium chloroacetate aqueous solution into the reaction kettle for 1-2h, controlling the temperature of the reaction kettle at 50-70 ℃ after dropwise adding, reacting for 1-3h, adding a 10wt% gamma-aminopropyl triethoxysilane glycol solution into the reaction kettle, stirring and reacting for 2-3h at normal temperature of 20-25 ℃, and finally obtaining a foam discharging main agent A, wherein the mass ratio of the diethylenetriamine polyoxyethylene polyoxypropylene ether to the 20wt% sodium chloroacetate aqueous solution is (1-4): 1 to 10 weight percent of gamma-aminopropyl triethoxysilane glycol solution accounts for 1 to 10 weight percent of 20 weight percent of sodium chloroacetate aqueous solution;
step 2, pumping 3-5 parts of the foam discharging main agent A prepared in the step 1, 100 parts of water, 1-3 parts of nonionic surfactant, 1-3 parts of zwitterionic surfactant, 0.1-0.5 part of foam stabilizer and 10-20 parts of antifreeze agent into a reaction kettle, and stirring and mixing uniformly to obtain a liquid foam discharging agent mixture;
and 3, filtering the liquid foam discharging agent mixture prepared in the step 2 by adopting a 0.5 micron filter screen for more than 2 times, sampling and performing cleanliness test, if the cleanliness is detected to be more than 8, repeatedly filtering the liquid foam discharging agent mixture by using the 0.5 micron filter screen again until the cleanliness of the product is less than 8, and finally preparing the liquid foam discharging agent of the deepwater oil-gas field.
6. The production process of the deepwater oil-gas field liquid foam discharging agent according to claim 5, which is characterized in that: the structural general formula of the diethylenetriamine polyoxyethylene polyoxypropylene ether is as follows:
wherein the molecular weight of the diethylenetriamine polyoxyethylene polyoxypropylene ether is 2000-3000g/mol, and in the structural general formula, X is Y=1 (3-6).
7. The production process of the deepwater oil-gas field liquid foam discharging agent according to claim 5, which is characterized in that: the nonionic surfactant is one or more of alkylphenol ethoxylates, tween 60, octyldecyl glucose anhydride and ethyl glucose anhydride.
8. The production process of the deepwater oil-gas field liquid foam discharging agent according to claim 5, which is characterized in that: the zwitterionic surfactant adopts one or more of cocoamidopropyl sulfobetaine, octyl dimethyl betaine, dodecyl sulfopropyl betaine, decane dimethyl amine oxide and octane amidopropyl dimethyl amine oxide.
9. The production process of the deepwater oil-gas field liquid foam discharging agent according to claim 5, which is characterized in that: the foam stabilizer adopts polyethylene glycol 200 or polyethylene glycol 400; the antifreeze agent adopts one or more of methanol, ethanol and glycol.
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