CN110791272A - Temperature-resistant salt-tolerant microbial fermentation broth foam system and preparation method thereof - Google Patents
Temperature-resistant salt-tolerant microbial fermentation broth foam system and preparation method thereof Download PDFInfo
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- CN110791272A CN110791272A CN201810869675.8A CN201810869675A CN110791272A CN 110791272 A CN110791272 A CN 110791272A CN 201810869675 A CN201810869675 A CN 201810869675A CN 110791272 A CN110791272 A CN 110791272A
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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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/582—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 bacteria
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
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- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
- C09K8/518—Foams
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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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—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 surfactants
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/92—Compositions for stimulating production by acting on the underground formation characterised by their form or by the form of their components, e.g. encapsulated material
- C09K8/94—Foams
Abstract
The invention belongs to the technical field of tertiary oil recovery, and particularly relates to a temperature-resistant salt-tolerant microbial fermentation broth foam system and a preparation method thereof. The fermentation liquor foam system consists of a foaming agent and foaming gas, wherein the foaming agent consists of a foaming agent, a foam stabilizer and formation water. The foaming agent is fermentation liquor of biosurfactant-producing bacteria, and the biosurfactant-producing bacteria are one of pseudomonas, geobacillus and bacillus. The foam stabilizer is fermentation liquor of biopolymer-producing bacteria, and the biopolymer-producing bacteria is one of sphingomonas, xanthomonas and sclerotinia sclerotiorumAnd (4) seed preparation. The foaming gas is air, nitrogen and CO2One kind of (1). The fermentation liquor foam system has the advantages of simple preparation method, low cost, strong foam stability, good field test effect, no subsequent treatment of produced liquid and no pollution to the environment. Therefore, the method can be widely applied to the foam flooding technology of the oil reservoir.
Description
Technical Field
The invention belongs to the technical field of tertiary oil recovery, and particularly relates to a temperature-resistant salt-tolerant microbial fermentation broth foam system and a preparation method thereof.
Background
As the development degree of the oil field is deepened, the oil deposit in the later development stage gradually enters a high water content stage, the dominant channel is formed, the heterogeneity contradiction is intensified, and the development effect of the oil field is seriously influenced. High-temperature and high-salinity oil reservoirs gradually become the main target for the development of old oil fields. The foam flooding technology is one of measures for effectively improving the recovery ratio in the later stage of oil field development, and has good plugging and profile control performance and selectivity to oil and water. In addition, the foam flooding can effectively weaken the adverse effects caused by viscous finger advance and gravity differentiation, and has an obvious effect of improving the recovery ratio compared with single gas flooding and single surfactant flooding. At present, because the foam fluid has poor stability and is easy to break under the conditions of high-temperature and high-salinity stratum, the good plugging profile control effect cannot be achieved, the aim of effectively improving the crude oil recovery rate is difficult to achieve, and the popularization of the foam flooding technology in oil fields is restricted. The invention provides a low-cost, environment-friendly, temperature-resistant and salt-tolerant foam system which can effectively block a high-permeability channel and improve the water injection sweep efficiency of a low-permeability layer.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a temperature-resistant salt-tolerant microbial fermentation broth foam system and a preparation method thereof. The foam system disclosed by the invention has the problems of low cost, strong stability, temperature resistance, salt tolerance, no subsequent treatment of produced liquid and no pollution to the environment.
The invention discloses a temperature-resistant salt-tolerant microbial fermentation broth foam system which is characterized by comprising a foaming agent and foaming gas, wherein the ratio of the foaming gas to the foaming agent is 5-10:1 by volume.
The foaming agent consists of a foaming agent, a foam stabilizer and formation water, and comprises the following components in parts by weight:
the component proportion and the mass percentage are calculated according to the percentage
5-10 parts of a foaming agent;
0.05-0.2 of foam stabilizer;
the rest is formation water.
The foaming agent is fermentation liquor of biosurfactant-producing bacteria, and the biosurfactant-producing bacteria are one of pseudomonas, geobacillus and bacillus.
The content of the biosurfactant in the fermentation liquor of the biosurfactant-producing bacteria is more than or equal to 30 g/L.
The surface tension of the fermentation liquor of the biosurfactant-producing bacteria is less than or equal to 28mN/m, and the interfacial tension is less than or equal to 0.5 mN/m.
The foam stabilizer is fermentation liquor of biopolymer-producing bacteria, and the biopolymer-producing bacteria is one of sphingomonas, xanthomonas and sclerotinia sclerotiorum.
The content of the biopolymer in the fermentation liquor of the biopolymer producing bacteria is more than or equal to 40 g/L.
The stratum water is oil field produced liquid, and the mineralization degree of the stratum water is more than 20000 mg/L.
The foaming gas is air, nitrogen and CO2One kind of (1).
A preparation method of a temperature-resistant salt-tolerant microbial fermentation broth foam system is characterized by comprising the following steps:
(1) adding formation water into a reactor, then adding a foaming agent while stirring at the temperature of 40-50 ℃, wherein the stirring speed is 200-400 rpm, the stirring time is 1-2 h, then adding a foam stabilizer, stirring at the temperature of 60-70 ℃ for 38-48 h, and stirring at the speed of 300-500 rpm, and uniformly stirring to obtain the foaming agent.
(2) And (3) uniformly filling foaming gas into the foaming agent at the normal temperature at the speed of 1-5L/min, and then stirring for 20-30 min at the stirring speed of 3000-5000 rpm to obtain a fermentation liquor foam system.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the temperature-resistant salt-tolerant microbial fermentation liquid foam system provided by the invention can effectively plug a high-permeability oil layer and improve the swept volume of injected water of a low-permeability oil layer; but also can selectively block off the water layer and improve the swept volume of the injected water in the oil layer, the comprehensive effect of the two aspects can greatly improve the crude oil recovery ratio of the foam flooding reservoir, and the recovery ratio is improved by more than 15% in a field test. The fermentation liquor foam system has strong temperature resistance and salt tolerance, the temperature resistance reaches more than 120 ℃, and the salt tolerance reaches more than 100000 mg/L. Meanwhile, the fermentation liquid foam system prepared by the method has the advantages of simple preparation method, low cost, strong foam stability, no subsequent treatment of produced liquid and no pollution to the environment. Therefore, the invention is a scientific, economic, green and environment-friendly foam flooding system.
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 preparation of fermentation broth foam System A
(1) 94.95kg of formation water is firstly added into a reactor, then 5kg of pseudomonas fermentation liquor is added under the condition of 40 ℃ and stirring, the stirring speed is 200rpm, the stirring time is 1h, then 0.05kg of the fermentation liquor of the monad of the sadi is added, the stirring is carried out for 38h under the condition of 60 ℃, the stirring speed is 400rpm, and the stirring is uniform, so that the foaming agent is obtained.
(2) And (3) uniformly charging 500L of foaming gas air into the foaming agent at the speed of 1L/min at normal temperature, and stirring for 20min at the stirring speed of 3000rpm to obtain a fermentation liquor foam system A.
The content of the biosurfactant in the pseudomonas fermentation liquor is 42.5g/L, the surface tension is 12.5mN/m, and the interfacial tension is 0.2 mN/m.
The content of the biopolymer in the fermentation liquor of the sphingomonas is 56.3 g/L.
The formation water is produced liquid of 3 oil wells dipped in the victory oil field, and the mineralization degree of the formation water is 25682 mg/L.
Indoor evaluation shows that the highest temperature resistance of the fermentation liquor foam system A is 128 ℃, and the highest salt tolerance reaches 125000 mg/L.
EXAMPLE 2 preparation of fermentation broth foam System B
(1) 93.9kg of formation water is firstly added into a reactor, then 6kg of Bacillus licheniformis fermentation liquor is added into the reactor under the condition of 45 ℃ and stirring at the stirring speed of 300rpm for 2h, then 0.1kg of Xanthomonas flavus fermentation liquor is added into the reactor, and the mixture is stirred for 42h under the condition of 65 ℃ and the stirring speed of 300rpm and is stirred uniformly to obtain the foaming agent.
(2) And (3) uniformly charging 800L of foaming gas nitrogen into the foaming agent at the normal temperature at the speed of 3L/min, and then stirring for 25min at the stirring speed of 4000rpm to obtain a fermentation liquor foam system B.
The content of the biosurfactant in the geobacillus fermentation liquor is 47.2g/L, the surface tension is 10.3mN/m, and the interfacial tension is 0.3 mN/m.
The content of the biopolymer in the xanthomonas fermentation liquor is 60.2 g/L.
The formation water is the output liquid of 68 oil wells of the Shengli oil field, and the mineralization degree of the formation water is 56825 mg/L.
Indoor evaluation shows that the highest temperature resistance of the fermentation liquor foam system B is 125 ℃, and the highest salt tolerance reaches 152000 mg/L.
EXAMPLE 3 preparation of fermentation broth foam System C
(1) 89.8kg of formation water is firstly added into a reactor, then 10kg of bacillus fermentation liquor is added into the reactor under the condition of 50 ℃ and stirring, the stirring speed is 400rpm, the stirring time is 2 hours, then 0.2kg of sclerotium rolfsii fermentation liquor is added into the reactor, the mixture is stirred for 48 hours under the condition of 70 ℃, the stirring speed is 500rpm, and the foaming agent is obtained after uniform stirring.
(2) At normal temperature, uniformly charging foaming gas CO into the foaming agent at a speed of 5L/min21000L, and then stirring for 30min under the condition that the stirring speed is 5000rpm to obtain a fermentation liquid foam system C.
The content of the biosurfactant in the bacillus fermentation liquor is 53.6g/L, the surface tension is 15.2mN/m, and the interfacial tension is 0.25 mN/m.
The content of the biopolymer in the fermentation liquor of the sphingomonas, the xanthomonas and the sclerotinia sclerotiorum is 51.7 g/L.
The formation water is produced liquid of 801 oil wells of the Shengli oil field, and the mineralization degree of the formation water is 37560 mg/L.
Indoor evaluation shows that the highest temperature resistance of the fermentation liquor foam system C is 122 ℃, and the highest salt tolerance reaches 136000 mg/L.
Example 4 field application
The fermentation liquor foam systems A, B and C prepared in the embodiments 1-3 of the invention are respectively used for carrying out field foam flooding tests on 3 blocks of mouth of a river, 68 blocks of Xin and 801 blocks of Luo, wherein the injection amount of the foam agent dipped in the 3 blocks of mouth of a river is 2.5 multiplied by 10 respectively4m3The amount of the air volume injected of the bubbling gas is 1.25X 105m3(ii) a The injection amount of the octyl 68 blocks of the foaming agent is 3.2 multiplied by 10 respectively4m3The nitrogen gas volume injection amount of the foaming gas is 2.56 multiplied by 105m3(ii) a The injection amount of the foaming agent of the Roman 801 blocks is 5.0 multiplied by 10 respectively4m3Bubbling gas CO2The volume injection amount is 5.0 × 105m3. The three block field tests respectively improve the recovery ratio by 21.3 percent, 23.5 percent and 26.7 percent, the input-output ratio is 1:8.2, 9.5 and 10.2, and the field test effect is good.
Claims (10)
1. A temperature-resistant and salt-tolerant microbial fermentation broth foam system is characterized by comprising a foaming agent and foaming gas, wherein the foaming agent comprises a foaming agent, a foam stabilizer and formation water.
2. The temperature and salt tolerant microbial broth foam system of claim 1, wherein the foaming agent is a broth of biosurfactant-producing bacteria, and the biosurfactant-producing bacteria is one of pseudomonas, bacillus geotrichum and bacillus.
3. The temperature-resistant and salt-tolerant microbial fermentation broth foam system of claim 2, wherein the content of biosurfactant in the fermentation broth of the biosurfactant-producing bacteria is not less than 30 g/L.
4. The temperature and salt tolerant microbial broth foam system of claim 2, wherein the biosurfactant-producing broth has a surface tension of 28mN/m or less and an interfacial tension of 0.5mN/m or less.
5. The temperature and salt resistant microbial fermentation broth foam system of claim 1, wherein the foam stabilizer is a fermentation broth of a biopolymer-producing bacterium, and the biopolymer-producing bacterium is one of a sphingomonas, xanthomonas and sclerotinia sclerotiorum.
6. The temperature-resistant and salt-tolerant microbial fermentation broth foam system of claim 5, wherein the content of the biopolymer in the biopolymer producing bacteria fermentation broth is not less than 40 g/L.
7. The temperature-resistant and salt-tolerant microbial fermentation broth foam system according to claim 1, wherein the formation water is oil field produced liquid, and the mineralization degree of the formation water is more than 20000 mg/L.
8. The temperature and salt tolerant microbial broth foam system of claim 1, wherein the foaming gas is air, nitrogen and CO2One kind of (1).
9. The method for preparing the temperature and salt tolerant microbial fermentation broth foam system according to any one of claims 1-8, wherein the method specifically comprises the following steps:
(1) firstly adding formation water into a reactor, then adding a foaming agent while stirring at the temperature of 40-50 ℃, wherein the stirring speed is 200-400 rpm, the stirring time is 1-2 h, then adding a foam stabilizer, stirring at the temperature of 60-70 ℃ for 38-48 h, the stirring speed is 300-500 rpm, and uniformly stirring to obtain a foaming agent;
(2) and (3) uniformly filling foaming gas into the foaming agent at the normal temperature at the speed of 1-5L/min, and then stirring for 20-30 min at the stirring speed of 3000-5000 rpm to obtain a fermentation liquor foam system.
10. The preparation method of the temperature-resistant salt-tolerant microbial fermentation broth foam system of claim 9, wherein the mass ratio of the foaming agent to the foam stabilizer to the formation water is 5-10%, the mass ratio of the foam stabilizer to the formation water is 0.05-0.2%, and the balance is water, and the ratio of the foaming gas to the foaming agent is 5-10:1 by volume.
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| CN114635679A (en) * | 2020-12-15 | 2022-06-17 | 中国石油化工股份有限公司 | Method for improving recovery ratio of igneous rock fractured bottom water heavy oil reservoir through multivariate coupling |
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Application publication date: 20200214 |