CN110699058A - Osmotic modified viscosity-reducing oil displacement agent for water-flooding thickened oil and preparation method thereof - Google Patents
Osmotic modified viscosity-reducing oil displacement agent for water-flooding thickened oil and preparation method thereof Download PDFInfo
- Publication number
- CN110699058A CN110699058A CN201910973101.XA CN201910973101A CN110699058A CN 110699058 A CN110699058 A CN 110699058A CN 201910973101 A CN201910973101 A CN 201910973101A CN 110699058 A CN110699058 A CN 110699058A
- Authority
- CN
- China
- Prior art keywords
- oil
- viscosity
- water
- penetration
- flooding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 230000003204 osmotic effect Effects 0.000 title abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 40
- 230000035515 penetration Effects 0.000 claims abstract description 30
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 claims abstract description 26
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 16
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 82
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 36
- 230000009467 reduction Effects 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 20
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- 239000012043 crude product Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 16
- 239000000295 fuel oil Substances 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 11
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 9
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 9
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 230000000379 polymerizing effect Effects 0.000 claims 1
- 239000003638 chemical reducing agent Substances 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 7
- 238000011161 development Methods 0.000 abstract description 5
- 230000018109 developmental process Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 230000033558 biomineral tissue development Effects 0.000 abstract description 2
- 239000013043 chemical agent Substances 0.000 abstract description 2
- 238000010526 radical polymerization reaction Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 description 12
- 239000010779 crude oil Substances 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 230000003068 static effect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000015784 hyperosmotic salinity response Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003027 oil sand Substances 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009878 intermolecular interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 150000003624 transition metals Chemical group 0.000 description 1
Classifications
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/588—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Lubricants (AREA)
Abstract
The invention relates to a chemical agent used in a thick oil exploitation process, in particular to a viscosity-reducing oil displacement agent used for water-flooding thick oil and having the functions of changing reservoir wettability and osmotic depolymerization and a preparation method thereof. The penetration modified viscosity-reducing oil displacement agent is prepared by free radical polymerization of 2-acrylamide-2-methylpropanesulfonic acid and allyl alcohol polyoxyethylene ether in water. The molar ratio of the 2-acrylamide-2-methylpropanesulfonic acid to the allyl alcohol polyoxyethylene ether is 1: 0.1 to 7, preferably 1: 1.5. The molecular weight of the penetration modified viscosity-reducing oil-displacing agent is 8000-100000 g/mol. The viscosity reducer can resist the mineralization degree of 50000mg/L and the temperature of 150 ℃, is suitable for a water-drive thickened oil reservoir with the viscosity of 500-5000 mPa.s, and can reduce the viscosity of the thickened oil to be below 100mPa.s when the use concentration is 500 ppm. Therefore, the method can be widely applied to the development of water flooding thickened oil.
Description
Technical Field
The invention relates to a chemical agent used in a thickened oil recovery process, in particular to a viscosity-reducing oil displacement agent which is used for water-flooding thickened oil and has the functions of changing reservoir wettability and osmotic depolymerization.
Background
China has rich thickened oil resources, and with the continuous demand of economic development on energy, thickened oil becomes one of the main battlefields for future oil exploitation in China, and thickened oil fields in China mainly adopt 2 development modes. Oil reservoirs with the viscosity of underground crude oil below 5000mPa.s are usually developed by water injection (about 18 percent of the recovery amount of the heavy oil), and the average recovery ratio of the water injection development is about 23 percent; the viscosity is more than 5000mPa.s, and a steam injection recovery mode is adopted (about 82% of the recovery amount of the thickened oil). Because the viscosity of the heavy oil is high, the water flooding generally has low water injection utilization rate and low recovery ratio, and some heavy oil reservoirs are too thin, and because of the great loss of energy in upper and lower rock stratums, the recovery ratio is not suitable to be improved by a thermal method. Many petroleum workers are engaged in chemical flooding research with great potential in the recovery of heavy oil in the hope of making a breakthrough in the chemical recovery of heavy oil.
Polymer flooding is mainly used for improving the recovery rate of crude oil by reducing the water-oil fluidity ratio and improving the sweep efficiency. In addition, the elastic polymer solution can generate viscous force through viscoelasticity, and the microscopic oil displacement efficiency of the crude oil is improved. The polymer flooding technology of China walks in the front of the world and is applied to oil fields such as Daqing, Shengli and the like in succession, and the technology and the corresponding matching technology are greatly developed from thin oil to thick oil and from a whole oil field to a broken oil field. Polymer flooding techniques have grown well in the production of common oil reservoirs. In general, the polymer flooding is suitable for oil reservoirs with high oil saturation and medium heterogeneity, and is not suitable for heavy oil reservoirs with stratum crude oil viscosity of more than 200 mPa.s. When the foreign scholars summarize the practice of the polymer flooding mine field at the end of the 20 th century, the foreign scholars find that the viscosity of crude oil of the oil reservoir with the successful polymer flooding is 126mPa.s at most, and although the oil reservoir with the viscosity of 250mPa.s is optimistic, the foreign scholars have great uncertainty.
At present, the viscosity reduction flooding of the thickened oil mainly uses a small-molecular viscosity reducer as a main component, and has the problems of large oil-water ratio, easy finger advance and low recovery ratio. In addition, the small-molecular viscosity reducer has large dosage and high cost, and limits the application scale of the small-molecular viscosity reducer in the water flooding of the thickened oil; the low activity causes that the micromolecular viscosity reducer is difficult to effectively use residual oil between wells under the condition of oil reservoir micro-power.
Disclosure of Invention
Aiming at the problems that the heavy oil reservoir is difficult to effectively use under the low-power condition, the conventional viscosity reducer is low in efficiency and large in oil-water flow ratio in the prior art, the invention provides the polymer type viscosity reducer which can realize the depolymerization and dispersion viscosity reduction of the heavy oil under the unpowered condition and has the function of changing the reservoir wettability, the viscosity reducer can resist the mineralization degree of 50000mg/L and the temperature of 150 ℃, can adapt to a water-drive heavy oil reservoir with the viscosity of 500-5000 mPa.s, and can reduce the viscosity of the heavy oil to be below 100mPa.s when the use concentration is 500 ppm.
The invention discloses an osmotic modified viscosity-reducing oil displacement agent for water-drive thickened oil, which is prepared by free radical polymerization of 2-acrylamide-2-methylpropanesulfonic acid and allyl alcohol polyoxyethylene ether in water, and has the following molecular formula:
wherein x is 1 to 50, preferably 20 to 30;
m is 600-;
n is 100-.
Preferably, the molecular weight of the penetration modified viscosity-reducing oil-displacing agent is 8000-100000 g/mol.
The invention also aims to provide a preparation method of the penetration modified viscosity-reducing oil displacement agent, which specifically comprises the following steps:
(1) adding 2-acrylamide-2-methylpropanesulfonic acid and allyl alcohol polyoxyethylene ether into a four-neck flask with a thermometer, a reflux condenser tube and a stirrer, heating while stirring at the stirring speed of 200-400 rpm at the heating temperature of 30-60 ℃, introducing nitrogen, and introducing the nitrogen for 5-8 min.
(2) Then adding sodium bisulfite and ammonium persulfate solution, continuously introducing nitrogen, heating the four-neck flask to 70-90 ℃, adjusting the stirring speed to 500-600rpm, reacting for 4-7h, closing the heat source and the stirrer, cooling to room temperature, and pouring into a beaker to obtain a crude product.
(3) Washing the crude product with absolute ethyl alcohol for 3-5 times, then placing the crude product in an oven at 60-80 ℃ for 24-30h at constant temperature to obtain a white solid matter, and crushing and screening the white solid matter by a crusher to obtain white powder with the mesh number of 300-500, namely the penetration modified viscosity-reducing oil-displacing agent.
The molar ratio of the 2-acrylamide-2-methylpropanesulfonic acid to the allyl alcohol polyoxyethylene ether is 1: 0.1 to 7, preferably 1: 1.5.
The molar ratio of the sodium bisulfite to the ammonium persulfate is 1: 1-1.2, and the total dosage is 0.8-1.5% of the mass of the 2-acrylamide-2-methylpropanesulfonic acid.
The dosage of the absolute ethyl alcohol is 5 to 8 times of the mass of the 2-acrylamide-2-methylpropanesulfonic acid.
The reaction equation of the penetration modified viscosity-reducing oil displacement agent is as follows:
the long carbon main chain of the permeation modified viscosity-reducing oil displacement agent belongs to a hydrophobic group, has good oleophylic performance, enables molecules to rapidly permeate into an oil phase from a water phase through an oil-water interface, and is easy to generate intermolecular interaction (dispersion force) with large aromatic ring compounds (asphalt, colloid and the like) and long-chain aliphatic hydrocarbon (paraffin and the like) in thick oil; meanwhile, the long-chain structure is also beneficial to reducing the freezing point of the thick oil. The sulfonic acid group on the molecule can change and eliminate the electrostatic interaction and hydrogen bond interaction between polar molecules (a compound containing heteroatom, a compound containing transition metal atom and the like) in the thickened oil; and the polyethoxy group in the structure has good flexibility, is easy to intertwine with the crude oil, and can form O/W emulsion with the crude oil under the action of low power. Therefore, the penetration modified viscosity-reducing oil-displacing agent not only has an excellent effect of changing wettability, but also has the effects of deagglomerating, dispersing and reducing viscosity under the condition of oil reservoir micro-power. In addition, a plurality of active groups on the long carbon chain of the molecule obviously reduce the use concentration of the oil displacement agent, and the low-cost development of the water-flooding thickened oil can be realized.
Compared with the prior art, the invention has the following beneficial effects and advantages:
(1) the penetration modified viscosity-reducing oil-displacing agent has the advantages of wide raw material source, simple synthesis process, clean and pollution-free process, and easy acquisition, transportation and storage of the product;
(2) the penetration modified viscosity-reducing oil displacement agent has the dual functions of changing reservoir wettability and low-power depolymerization viscosity reduction, and can realize deep micro-power viscosity reduction of thick oil in an oil reservoir;
(3) the penetration modified viscosity-reducing oil displacement agent has the characteristics of high activity and low concentration, and can reduce the viscosity of the thick oil of 500-5000 mPa.s to be less than 100mPa.s under the condition that the use concentration is 500 mg/L.
Detailed Description
The present invention is described in further detail below with reference to specific examples and with reference to the data. It will be understood that these examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
(1) 1mol of 2-acrylamide-2-methylpropanesulfonic acid and 0.1mol of allyl alcohol polyoxyethylene ether are added into a four-neck flask with a thermometer, a reflux condenser tube and a stirrer, and the mixture is heated while stirring, wherein the stirring speed is 200rpm, the heating temperature is 30 ℃, nitrogen is introduced, and the nitrogen introduction time is 5 min.
(2) Then adding 0.88g of sodium bisulfite and 0.88g of ammonium persulfate solution, continuously introducing nitrogen, heating the four-neck flask to 70 ℃, adjusting the stirring speed to 500rpm, reacting for 4 hours, closing a heat source and a stirrer, cooling to room temperature, and pouring into a beaker to obtain a crude product.
(3) Washing the crude product with 1362.2g of absolute ethyl alcohol for 3 times, then placing the crude product in a 60 ℃ oven for keeping the temperature for 24 hours to obtain a white solid matter, crushing and screening the white solid matter by a crusher to obtain white powder with the mesh number of 300-500, namely the penetration modified viscosity reduction oil displacement agent A1. By testing, A1The highest salt tolerance reaches 52000mg/L, the highest temperature resistance reaches 155 ℃, and the yield is 99.1%.
The reaction equation of the penetration modified viscosity-reducing oil displacement agent is as follows:
wherein: x is 1-10;
m＝600-10000；
n＝100-500。
example 2
(1) 1mol of 2-acrylamide-2-methylpropanesulfonic acid and 1.5mol of allyl alcohol polyoxyethylene ether are added into a four-neck flask with a thermometer, a reflux condenser tube and a stirrer, and the mixture is heated while stirring, wherein the stirring speed is 300rpm, the heating temperature is 45 ℃, nitrogen is introduced, and the nitrogen introduction time is 6 min.
(2) Then adding 0.80g of sodium bisulfite and 0.88g of ammonium persulfate solution, continuously introducing nitrogen, heating the four-neck flask to 75 ℃, adjusting the stirring speed to 520rpm, reacting for 6 hours, closing a heat source and a stirrer, cooling to room temperature, and pouring into a beaker to obtain a crude product.
(3) Washing the crude product with 1486.3g anhydrous ethanol for 4 times, placing in a 65 deg.C oven, maintaining the temperature for 26 hr to obtain white solid substance, pulverizing with pulverizer, and sieving to obtain powder with mesh number of300-mesh 500-mesh white powder is the penetration modified viscosity reduction oil displacement agent A2. By testing, A2The highest salt tolerance reaches 55000mg/L, the highest temperature resistance reaches 162 ℃, and the yield is 99.8%.
The reaction equation of the penetration modified viscosity-reducing oil displacement agent is as follows:
wherein: x is 20-30;
m＝4000-6000；
n＝300-1000。
example 3
(1) 1mol of 2-acrylamide-2-methylpropanesulfonic acid and 4.8mol of allyl alcohol polyoxyethylene ether are added into a four-neck flask with a thermometer, a reflux condenser tube and a stirrer, and the mixture is heated while stirring, wherein the stirring speed is 350rpm, the heating temperature is 52 ℃, nitrogen is introduced, and the nitrogen introduction time is 7 min.
(2) Then adding 1.2g of sodium bisulfite and 1.42g of ammonium persulfate solution, continuously introducing nitrogen, heating the four-neck flask to 80 ℃, adjusting the stirring speed to 560rpm, reacting for 5h, closing a heat source and a stirrer, cooling to room temperature, and pouring into a beaker to obtain a crude product.
(3) Washing the crude product with 1568.7g of absolute ethyl alcohol for 5 times, then placing the crude product in a 73 ℃ oven for keeping the temperature for 25 hours to obtain a white solid matter, crushing and screening the white solid matter by a crusher to obtain white powder with the mesh number of 300-500, namely the penetration modified viscosity reduction oil displacement agent A3. By testing, A3The highest salt tolerance reaches 51200mg/L, the highest temperature resistance reaches 152 ℃, and the yield is 99.3%.
The reaction equation of the penetration modified viscosity-reducing oil displacement agent is as follows:
m＝20000-30000；
n＝1000-3000。
example 4
(1) Adding 1mol of 2-acrylamide-2-methylpropanesulfonic acid and 7mol of allyl alcohol polyoxyethylene ether into a four-neck flask with a thermometer, a reflux condenser and a stirrer, heating while stirring at the stirring speed of 400rpm and the heating temperature of 60 ℃, introducing nitrogen, and introducing the nitrogen for 8 min.
(2) Then adding 1.4g of sodium bisulfite and 1.68g of ammonium persulfate solution, continuously introducing nitrogen, heating the four-neck flask to 90 ℃, adjusting the stirring speed to 600rpm, reacting for 7 hours, closing a heat source and a stirrer, cooling to room temperature, and pouring into a beaker to obtain a crude product.
(3) Washing the crude product with 1657.9g of absolute ethyl alcohol for 5 times, then placing the crude product in an oven at 80 ℃ for constant temperature for 30 hours to obtain a white solid matter, crushing and screening the white solid matter by a crusher to obtain white powder with the mesh number of 300-500, namely the penetration modified viscosity reduction oil displacement agent A4. By testing, A4The highest salt tolerance reaches 52300mg/L, the highest temperature resistance reaches 158 ℃, and the yield is 99.5%.
The reaction equation of the penetration modified viscosity-reducing oil displacement agent is as follows:
wherein: x is 40-50;
m＝50000-70000；
n＝4000-5000。
example 5 Low Power viscosity reduction and static Wash oil evaluation experiment
Respectively taking a penetration modified viscosity-reduction oil displacement agent A1、A2、A3、A4And 0.5g of commercially available nonionic viscosity reducer OP-10 (alkylphenol ethoxylates) and anionic viscosity reducer AES (fatty alcohol-polyoxyethylene ether sodium sulfate), and 1000g of viscosity reducer solution with the concentration of 500ppm is prepared by using mineralized water (50000mg/L) and is stirred for 1 hour respectively for later use.
The oil for the experiment is an oil sample H (ground degassing viscosity of 979mPa.s at 50 ℃) of a certain block at the estuary of the victory oil field, and the density is 0.9454g/cm3Water content of 22.6%, by developing low powerAnd (3) performing tests such as emulsification viscosity reduction, static oil washing and the like to determine the viscosity reduction rate and the oil washing rate of different viscosity reducers.
The low-power viscosity reduction test method comprises the following steps: the initial viscosity mu of the oil sample is determined by a Brookfield DV-III + viscometer at 50 DEG C0Taking 70g of crude oil, putting the crude oil into a 100ml beaker, pouring 30g of the prepared viscosity reducer solution, heating the mixture at a constant temperature of 50 ℃ for 30min, then stirring the mixture by using a stirrer for 5min at a stirring speed of 50rpm, and testing the viscosity mu of the emulsion under a Brookfield DV-III + viscometer, wherein the viscosity reduction rate is calculated according to the formula (1):
in the formula:
f-viscosity reduction rate,%;
μ0-initial viscosity of crude oil at 50 ℃, mPa · s;
mu-viscosity of crude oil after viscosity reduction, mPas.
The static oil washing performance evaluation method comprises the following steps: and (3) preparing oil sand by taking the oil sample H as a base oil sample, wherein the oil sand ratio is 1:4, and aging for 7 days. Other operation steps are tested according to the method 5.8 in Q/SLCG 5370-1999, and the test results of low-power viscosity reduction and static oil washing rate are shown in the table 1.
TABLE 1 Low dynamic static wash oil and viscosity reduction test results for different viscosity reducers
The experimental results show that: penetration modified viscosity-reducing oil displacement agent A1、A2、A3、A4The low-power viscosity reduction rate is more than 95 percent, and the viscosity after viscosity reduction is less than 100 mPa.s; the static oil washing rate is higher than 50%, and the comprehensive performance of the oil displacement agent is superior to that of a non-ionic viscosity reducer OP-10 (alkylphenol polyoxyethylene ether) and an anionic viscosity reducer AES (fatty alcohol polyoxyethylene ether sodium sulfate) sold in the market, so that the penetration modified viscosity reduction oil displacement agent can meet the requirement of improving the recovery ratio of water-drive thickened oil.
Claims (9)
1. The penetration modified viscosity-reducing oil displacement agent for the water-drive thickened oil is characterized by being prepared by polymerizing 2-acrylamide-2-methylpropanesulfonic acid and allyl alcohol polyoxyethylene ether in water through free radicals, and the molecular formula of the penetration modified viscosity-reducing oil displacement agent is as follows:
wherein x is 1-50;
m＝600-70000；
n＝100-5000。
2. the penetration modified viscosity-reducing oil-displacing agent for heavy oil flooding according to claim 1, wherein x is 20-30, m is 4000-6000, and n is 300-1000.
3. The penetration modified viscosity-reducing oil-displacing agent for the water-flooding thickened oil according to claim 1, wherein the molecular weight of the penetration modified viscosity-reducing oil-displacing agent is 8000-100000 g/mol.
4. The preparation method of the osmosis modified viscosity reduction oil displacement agent for the water-drive thickened oil according to any one of claims 1 to 3, which is characterized by comprising the following steps:
(1) adding 2-acrylamide-2-methylpropanesulfonic acid and allyl alcohol polyoxyethylene ether into a four-neck flask with a thermometer, a reflux condenser tube and a stirrer, heating while stirring, wherein the stirring speed is 200-400 rpm, the heating temperature is 30-60 ℃, introducing nitrogen, and the nitrogen introduction time is 5-8 min;
(2) then adding sodium bisulfite and ammonium persulfate solution, continuously introducing nitrogen, heating the four-neck flask to 70-90 ℃, adjusting the stirring speed to 500-600rpm, reacting for 4-7h, closing a heat source and a stirrer, cooling to room temperature, and pouring into a beaker to obtain a crude product;
(3) washing the crude product with absolute ethyl alcohol for 3-5 times, then placing the crude product in an oven at 60-80 ℃ for 24-30h at constant temperature to obtain a white solid matter, and crushing and screening the white solid matter by a crusher to obtain white powder with the mesh number of 300-500, namely the penetration modified viscosity-reducing oil-displacing agent.
5. The preparation method of the penetration modified viscosity-reducing oil-displacing agent for water-flooding thickened oil according to claim 4, wherein the molar ratio of the 2-acrylamide-2-methylpropanesulfonic acid to the allyl alcohol polyoxyethylene ether is 1: 0.1 to 7.
6. The preparation method of the penetration modified viscosity-reducing oil-displacing agent for the water-flooding thickened oil according to claim 5, wherein the molar ratio of the 2-acrylamide-2-methylpropanesulfonic acid to the allyl alcohol polyoxyethylene ether is 1: 1.5.
7. The preparation method of the penetration modified viscosity-reducing oil-displacing agent for water-flooding thickened oil according to claim 4, wherein the molar ratio of the sodium bisulfite to the ammonium persulfate is 1: 1-1.2.
8. The preparation method of the permeation modification viscosity reduction oil displacement agent for the water-flooding thickened oil according to claim 7, wherein the total amount of the sodium bisulfite and the ammonium persulfate is 0.8-1.5% of the mass of the 2-acrylamide-2-methylpropanesulfonic acid.
9. The preparation method of the osmosis modified viscosity reduction oil displacement agent for the water-flooding thickened oil according to claim 4, wherein the amount of the absolute ethyl alcohol is 5-8 times of the mass of the 2-acrylamide-2-methylpropanesulfonic acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910973101.XA CN110699058A (en) | 2019-10-14 | 2019-10-14 | Osmotic modified viscosity-reducing oil displacement agent for water-flooding thickened oil and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910973101.XA CN110699058A (en) | 2019-10-14 | 2019-10-14 | Osmotic modified viscosity-reducing oil displacement agent for water-flooding thickened oil and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110699058A true CN110699058A (en) | 2020-01-17 |
Family
ID=69199184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910973101.XA Pending CN110699058A (en) | 2019-10-14 | 2019-10-14 | Osmotic modified viscosity-reducing oil displacement agent for water-flooding thickened oil and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110699058A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113831906A (en) * | 2021-10-22 | 2021-12-24 | 中国石油化工股份有限公司 | Viscosity-reducing oil displacement agent for water-sensitive heavy oil reservoir and preparation method and application thereof |
| CN113956394A (en) * | 2021-10-22 | 2022-01-21 | 中国石油化工股份有限公司 | Oil displacement agent for low-permeability sensitive heavy oil reservoir and preparation method and application thereof |
| CN114133922A (en) * | 2020-09-04 | 2022-03-04 | 中国石油化工股份有限公司 | Water-soluble oil washing agent and preparation method and application thereof |
| CN114426650A (en) * | 2020-10-14 | 2022-05-03 | 中国石油化工股份有限公司 | Polymer type viscosity reducer for cold production of thick oil and preparation method thereof |
| CN114426635A (en) * | 2020-10-14 | 2022-05-03 | 中国石油化工股份有限公司 | Viscosity-reducing oil displacement agent for thickened oil water-drive-simulated development and preparation method thereof |
| CN114437699A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Oil washing agent and preparation method and application thereof |
| CN114507312A (en) * | 2020-10-28 | 2022-05-17 | 中国石油化工股份有限公司 | Interface modified viscosity reducer for oil displacement and preparation method and application thereof |
| CN115651627A (en) * | 2022-12-27 | 2023-01-31 | 胜利油田方圆化工有限公司 | Preparation process and application of modified polymer oil displacement agent for petroleum exploitation |
| CN115948155A (en) * | 2023-03-13 | 2023-04-11 | 胜利油田方圆化工有限公司 | Preparation process and application of viscosity-reducing oil displacement agent for oil exploitation |
| CN116064019A (en) * | 2021-10-29 | 2023-05-05 | 中国石油化工股份有限公司 | Oil displacement composition and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368090A (en) * | 2008-09-19 | 2009-02-18 | 宋福如 | Process for preparing silicon-fluorine high temperature resistant thinner dry powder for drilling fluids |
| CN102268121A (en) * | 2011-05-23 | 2011-12-07 | 同济大学 | Polycarboxylic acid water reducer with high water-reducing rate and high slump constant holding capacity, and its synthetic method and use method |
| CN103992443A (en) * | 2014-05-19 | 2014-08-20 | 科之杰新材料集团有限公司 | Method for preparing polycarboxylate water reducing agent by normal-temperature mixing process |
| CN106967200A (en) * | 2017-03-31 | 2017-07-21 | 刘翠芬 | It is a kind of to have poly carboxylic acid series water reducer that guarantor is collapsed with viscosity-reducing performance and preparation method thereof concurrently |
| CN108641686A (en) * | 2018-05-25 | 2018-10-12 | 成都理工大学 | Superhigh temperature ultrahigh-density water-base drilling fluid completion fluid polycarboxylate flow pattern regulator and preparation method thereof |
-
2019
- 2019-10-14 CN CN201910973101.XA patent/CN110699058A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101368090A (en) * | 2008-09-19 | 2009-02-18 | 宋福如 | Process for preparing silicon-fluorine high temperature resistant thinner dry powder for drilling fluids |
| CN102268121A (en) * | 2011-05-23 | 2011-12-07 | 同济大学 | Polycarboxylic acid water reducer with high water-reducing rate and high slump constant holding capacity, and its synthetic method and use method |
| CN103992443A (en) * | 2014-05-19 | 2014-08-20 | 科之杰新材料集团有限公司 | Method for preparing polycarboxylate water reducing agent by normal-temperature mixing process |
| CN106967200A (en) * | 2017-03-31 | 2017-07-21 | 刘翠芬 | It is a kind of to have poly carboxylic acid series water reducer that guarantor is collapsed with viscosity-reducing performance and preparation method thereof concurrently |
| CN108641686A (en) * | 2018-05-25 | 2018-10-12 | 成都理工大学 | Superhigh temperature ultrahigh-density water-base drilling fluid completion fluid polycarboxylate flow pattern regulator and preparation method thereof |
Non-Patent Citations (7)
| Title |
|---|
| 于丽丽: "聚合物稠油降粘剂的制备与性能评价", 《吉林大学硕士学位论文》 * |
| 全红平等: "聚氧乙烯基型降滤失剂SJ-1的合成与性能评价 ", 《精细化工》 * |
| 刘向君等: "一种两性离子聚合物合成及粘土稳定性能研究 ", 《化学研究与应用》 * |
| 刘鹭等: "低黏度效应聚合物降滤失剂的合成与性能评价 ", 《油田化学》 * |
| 李晋玲等: "烯丙醇聚氧乙烯醚与马来酸酐的共聚合及竞聚率测定 ", 《高分子通报》 * |
| 郭春等: "海水水泥浆用分散型降失水剂的制备及性能 ", 《石油化工》 * |
| 陈艳杰等: "APEG/PS/ODMA两亲性梳型聚合物的合成与溶液性质 ", 《高分子材料科学与工程》 * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114133922A (en) * | 2020-09-04 | 2022-03-04 | 中国石油化工股份有限公司 | Water-soluble oil washing agent and preparation method and application thereof |
| CN114133922B (en) * | 2020-09-04 | 2023-03-14 | 中国石油化工股份有限公司 | Water-soluble oil washing agent and preparation method and application thereof |
| CN114426650A (en) * | 2020-10-14 | 2022-05-03 | 中国石油化工股份有限公司 | Polymer type viscosity reducer for cold production of thick oil and preparation method thereof |
| CN114426635A (en) * | 2020-10-14 | 2022-05-03 | 中国石油化工股份有限公司 | Viscosity-reducing oil displacement agent for thickened oil water-drive-simulated development and preparation method thereof |
| CN114426650B (en) * | 2020-10-14 | 2023-10-20 | 中国石油化工股份有限公司 | Polymer type viscosity reducer for thickened oil cold recovery and preparation method thereof |
| CN114426635B (en) * | 2020-10-14 | 2023-08-04 | 中国石油化工股份有限公司 | Viscosity-reducing oil displacement agent for thick oil water-drive development and preparation method thereof |
| CN114437699B (en) * | 2020-10-20 | 2023-07-21 | 中国石油化工股份有限公司 | Oil washing agent and preparation method and application thereof |
| CN114437699A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Oil washing agent and preparation method and application thereof |
| CN114507312A (en) * | 2020-10-28 | 2022-05-17 | 中国石油化工股份有限公司 | Interface modified viscosity reducer for oil displacement and preparation method and application thereof |
| CN114507312B (en) * | 2020-10-28 | 2024-06-11 | 中国石油化工股份有限公司 | Interfacial modification viscosity reducer for oil displacement and preparation method and application thereof |
| CN113956394A (en) * | 2021-10-22 | 2022-01-21 | 中国石油化工股份有限公司 | Oil displacement agent for low-permeability sensitive heavy oil reservoir and preparation method and application thereof |
| CN113831906B (en) * | 2021-10-22 | 2023-03-14 | 中国石油化工股份有限公司 | Viscosity-reducing oil displacement agent for water-sensitive heavy oil reservoir and preparation method and application thereof |
| CN113831906A (en) * | 2021-10-22 | 2021-12-24 | 中国石油化工股份有限公司 | Viscosity-reducing oil displacement agent for water-sensitive heavy oil reservoir and preparation method and application thereof |
| CN116064019A (en) * | 2021-10-29 | 2023-05-05 | 中国石油化工股份有限公司 | Oil displacement composition and preparation method and application thereof |
| CN115651627B (en) * | 2022-12-27 | 2023-03-10 | 胜利油田方圆化工有限公司 | Preparation process and application of modified polymer oil-displacing agent for oil exploitation |
| CN115651627A (en) * | 2022-12-27 | 2023-01-31 | 胜利油田方圆化工有限公司 | Preparation process and application of modified polymer oil displacement agent for petroleum exploitation |
| CN115948155B (en) * | 2023-03-13 | 2023-05-12 | 胜利油田方圆化工有限公司 | Preparation process and application of viscosity-reducing oil displacement agent for petroleum exploitation |
| CN115948155A (en) * | 2023-03-13 | 2023-04-11 | 胜利油田方圆化工有限公司 | Preparation process and application of viscosity-reducing oil displacement agent for oil exploitation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110699058A (en) | Osmotic modified viscosity-reducing oil displacement agent for water-flooding thickened oil and preparation method thereof | |
| CN102464976B (en) | Oil-displacing composition and preparation method thereof | |
| CN103320112B (en) | A kind of anti-shearing dendritic polymers oil-displacing agent and synthetic method thereof | |
| CN102703049B (en) | Binary composite oil displacement composition and application thereof in tertiary oil recovery | |
| CN102690644B (en) | Binary alkali-free composite oil displacement composition suitable for high-temperature high-salt oil reservoir and application thereof | |
| CN102250606B (en) | Microemulsion for heavy oil thermal recovery and preparation method for microemulsion | |
| CN109135709B (en) | Viscosity-reducing oil displacement agent and oil displacement system suitable for heavy oil reservoir | |
| CN103540305B (en) | Surfactant composition for chemical displacement of reservoir oil and preparation method thereof | |
| CN111961457B (en) | Oil displacement complexing agent for heavy oil reservoir and preparation method and application thereof | |
| CN103555310A (en) | Spontaneous emulsification viscosity-break system of thickened oil, and preparation method thereof | |
| CN102464977A (en) | Oil displacement method for improving recovery ratio of high-temperature high-salt oil reservoir | |
| CN104672408B (en) | A kind of water-soluble flooding polymers for having rigid core shell structure and preparation method thereof | |
| CN107674664A (en) | Strengthen modified graphite particle system and its preparation and the application of polymer/binary/ternary composite oil-displacing system | |
| CN104559985B (en) | The displacement of reservoir oil is applied in poly- table pack object and its tertiary oil recovery | |
| CN101875838A (en) | A kind of oil-soluble viscosity reducer and preparation method thereof | |
| CN115703862A (en) | Thickened carbon dioxide oil displacement efficient thickening agent and preparation method thereof | |
| CN113136190A (en) | Thickened oil viscosity reduction oil displacement agent with profile control and flooding performance and preparation method thereof | |
| CN102274701A (en) | Surfactant, preparation and application thereof | |
| CN103540306B (en) | Three adopt surfactant composition and preparation method thereof | |
| CN105349130A (en) | Diutan gum and surfactant compound reservoir oil displacement system suitable for high-temperature high-salt oil reservoir | |
| CN103773348B (en) | Poly-table binary composite oil displacement agent and flooding method | |
| CN102373050B (en) | Composition for improving recovery ratio of tertiary oil recovery and preparation method thereof | |
| CN110643341B (en) | Oil-water-mineral interface modifier for heavy oil thermal recovery and preparation method thereof | |
| CN104449633B (en) | Crude oil surfactant and preparation method and application thereof | |
| CN103773347B (en) | Improve oil recovery factor surfactant composition and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200117 |
|
| RJ01 | Rejection of invention patent application after publication |