CN109896637B - Biological regulation and control preparation for polymer flooding produced water and use method thereof - Google Patents
Biological regulation and control preparation for polymer flooding produced water and use method thereof Download PDFInfo
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Abstract
The invention provides a biological regulation and control preparation, which takes polymer flooding effluent as a raw material, and bacteria with sulfur ion oxidation capability, namely sulfur oxidizing bacteria, can be generated in fermentation liquor after nutrient substances are added and anaerobic fermentation is carried out, wherein the sulfur oxidizing bacteria can fix CO2As a carbon source, chemoautotrophic growth and chemoheterotrophic growth can be carried out; the sulfur oxidizing bacteria can grow and metabolize by using sulfide, elemental sulfur, sulfite, thiosulfate, thiocyanate, SDS, tetrathionate, sulfanilic acid, methionine and the like as energy sources. The sulfur-oxidizing bacteria have competitive inhibition effect on sulfate-reducing bacteria, fermentation liquor containing the sulfur-oxidizing bacteria is reused for polymer flooding produced water, the growth of the sulfate-reducing bacteria (SRB) can be inhibited, microbial corrosion of a base material can be inhibited, the stability of polymer-containing wastewater is maintained, and the water can be used for preparing a polymer flooding fluid to save water resources.
Description
Technical Field
The invention relates to the field of polymer-containing sewage treatment in oil fields, in particular to a biological regulation and control preparation for polymer flooding produced water and a using method thereof.
Background
Along with the popularization and application of tertiary oil recovery technologies such as polymer injection oil displacement, ternary complex oil displacement and the like, the scale is larger and larger, and the oil recovery and yield increase effects are obvious. However, the oil production is greatly improved, and the hydrolysis of the oil displacement polymer in the oil extraction system and the addition of a large amount of chemical agents lead to more complex and stable emulsification of the produced liquid, and further lead to the fact that the content of bacteria in the output sewage cannot be effectively controlled.
The polymer flooding produced water contains a large amount of bacteria, wherein SRB (sulfate reducing bacteria) are mainly bacteria, and the SRB easily causes pipeline corrosion and environmental pollution, and if the SRB is not effectively treated, the discharge and the recycling of the polymer flooding produced water are influenced. In the prior art, in order to reduce the bacterial content in sewage, bactericides are generally used for sterilization. In the existing oil field and industrial water treatment sterilization process, the used bactericides are generally divided into oxidizing bactericides and non-oxidizing bactericides according to functions and components, the oxidizing bactericides are large in dosage, not ideal in field use effect, sometimes even accelerated to corrode, and limited in popularization and application, so that most of the oil fields in China use the non-oxidizing bactericides, mainly comprising quaternary ammonium salts, quaternary phosphonium salts, phenolic aldehydes, heterocycles, cyanogen-containing compounds, heavy metals and the like. The sterilization treatment of polymer-containing sewage is more difficult than that of general wastewater because a chemical flooding system, either an injection system or a recovery system, contains a certain amount of polymer, surfactant and a certain amount of alkaline substance, such as sodium hydroxide or sodium carbonate, to different degrees. Under the condition, after the traditional bactericide, such as 1227 and other cationic surfactants, is added into sewage, a water-insoluble complex is formed with anionic surfactants in the sewage, and meanwhile, a precipitator flocculation reaction is also carried out with partially Hydrolyzed Polyacrylamide (HPAM) to form precipitate or flocculate, so that the effective use concentration of the bactericide is greatly reduced, and the due bactericidal effect of the bactericide is lost.
In order to solve the technical problem, the prior art focuses on researching a bactericide which can achieve a sterilization effect and does not precipitate with a polymer, for example, chinese patent document CN107118133A discloses a biquaternary ammonium salt bactericide, wherein the bactericide takes tertiary ammonium, concentrated hydrochloric acid and epichlorohydrin as reactants, and sewage ethanol as a solvent to prepare a first intermediate; and then the intermediate and chlorosulfonic acid are used as reactants, and dichloromethane is used as a solvent to prepare a second intermediate, and the second intermediate is further used as a reactant of sodium hydroxide and a solvent of ethanol to synthesize the sulfate bisquaternary bactericide. The bactericide has good compatibility with polymer-containing produced liquid, can reduce flocculation and precipitation of polymers, and prevents the problem of bactericide effect reduction caused by precipitation.
Although the quaternary ammonium salt bactericide in the prior art can effectively reduce the precipitation of polymers, the quaternary ammonium salt bactericide still has the technical problem that microorganisms can generate drug resistance to non-oxidative bactericides such as quaternary ammonium salts, amine compounds, anthraquinone, aldehydes and the like to become drug-resistant bacteria when being used for a long time, and the occurrence of the drug-resistant bacteria can directly cause the great increase of the oilfield exploitation cost; in addition, the cationic surfactant bactericide can also aggravate oil-water emulsification, and the oil-water separation is difficult when the cationic surfactant bactericide is used in a large amount, so that the purification and oil removal of produced water are influenced, and secondary environmental pollution is caused. Under the circumstances, it is an urgent technical problem in the art to find a sterilization method suitable for polymer flooding water, which does not form precipitates with polymers and can be used for a long time, thereby preventing corrosion and environmental pollution caused by SRB microorganisms.
Disclosure of Invention
The invention solves the technical problems that the bactericide for polymer flooding produced water in the prior art is easy to precipitate with polymers, reduces the sterilizing effect or is easy to generate drug resistance, and further provides a biological inhibitor which is suitable for the polymer flooding produced water, does not form precipitates with the polymers and can be used for a long time.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a bioregulatory formulation for polymer flooding produced water, the bioregulatory formulation prepared by the method comprising: taking polymer flooding produced water, and removing crude oil in the polymer flooding produced water; adding nutrient substances into the polymer flooding output water after the crude oil is removed, and performing anaerobic fermentation at the temperature of 40 +/-1 ℃ to obtain fermentation liquor, namely the biological regulation and control preparation; the nutrient substances comprise phosphate, ammonium salt, heavy metal salt solution and complex acid, wherein the addition amount of the phosphate in the polymer flooding produced water is 2-2.8g/L, the addition amount of the ammonium salt in the polymer flooding produced water is 0.3-0.5g/L, and the addition amount of the heavy metal salt solution in the polymer flooding produced water is 10 based on the amount of metal ion substances-6-10-8And the addition amount of the complexing acid in the polymer flooding water is 0.0008-0.0012 g/L.
The polymer flooding water comprises the following components: calcium ions, wherein the concentration of the calcium ions in the polymer flooding water is 42-81mg/L calculated by Ca; magnesium ions, wherein the concentration of the magnesium ions in the polymer flooding water is 77-91Mg/L calculated by Mg; sodium ions and potassium ions, wherein the total concentration of the sodium ions and the potassium ions in the polymer flooding output water is 3092-5800mg/L in terms of Na and K; fluoride ions, wherein the concentration of the fluoride ions in the polymer flooding water is 9-12mg/L calculated by F; bromide, the concentration of the bromide in the polymer flooding water is 14-35mg/L calculated by Br; the pH value of the polymer flooding produced water is 7.77-8.15; the total amount of anaerobic bacteria in the polymer flooding produced water is (1.5-3) multiplied by 106Per mL; the concentration of polyacrylamide in the polymer flooding water is 500-1000 mg/L.
The phosphate is NaH2PO4And K2HPO4Said NaH2PO4And K2HPO4The addition amount of the polymer flooding water is 1.2 g/L.
The ammonium salt is (NH)4)2SO4Said (NH)4)2SO4The addition amount in the polymer flooding water was 0.4 g/L.
The heavy metal salt solution is a mixed solution of iron salt, manganese salt, cobalt salt, zinc salt and molybdenum salt.
The complexing acid is L-complexing acid, and the addition amount of the L-complexing acid in the polymer flooding water is 0.001 g/L.
In the anaerobic fermentation process, nitrogen is used for maintaining constant pressure, and the pressure is 1 MPa.
The time of anaerobic fermentation is 84-108 hours.
The application method of the biological control preparation for the polymer flooding produced water is characterized in that the biological control preparation is reused for the polymer flooding produced water for sterilization, and the addition amount of the biological control preparation in the polymer flooding produced water is 25-35 mL/L.
The addition amount of the biological control agent in the polymer flooding water is 30mL/L, and the retention time of the biological control agent in the polymer flooding water is more than or equal to 1 hour.
The biological regulation preparation for polymer flooding produced water has the advantages that:
the biological regulation and control preparation takes polymer flooding effluent as a raw material, and after nutrient substances are added and anaerobic fermentation is carried out, bacteria with sulfur ion oxidation capacity, namely sulfur oxidizing bacteria, can be generated in fermentation liquor, and the sulfur oxidizing bacteria can fix CO2As a carbon source, chemoautotrophic growth and chemoheterotrophic growth can be carried out; the sulfur oxidizing bacteria can grow and metabolize by using sulfide, elemental sulfur, sulfite, thiosulfate, thiocyanate, SDS, tetrathionate, sulfanilic acid, methionine and the like as energy sources. The sulfur-oxidizing bacteria have competitive inhibition effect on sulfate-reducing bacteria, fermentation liquor containing the sulfur-oxidizing bacteria is reused for polymer flooding produced water, the growth of the sulfate-reducing bacteria (SRB) can be inhibited, microbial corrosion of a base material can be inhibited, the stability of polymer-containing wastewater is maintained, and the water can be used for preparing a polymer flooding fluid to save water resources.
The biological control preparation prepared by the invention can play a role in inhibiting sulfate reducing bacteria after being added into polymer flooding produced water and staying for 1 hour, the polymer flooding produced water flows in a pipeline after being added with the biological control preparation, and polyacrylamide is added to prepare high-concentration polyacrylamide-containing liquid which is then reused as oil displacement polymer liquid. In the actual production process, the retention time of the biological control preparation in the polymer flooding water in the process is more than 1 hour, so that the requirement of sterilization can be met.
In order to make the technical scheme of the biological regulation preparation for polymer flooding produced water and the using method thereof more clear and more obvious, the technical scheme of the invention is further described in the following by combining the specific embodiment mode and the attached drawings.
Drawings
FIG. 1 is a graph showing the absorbance change of two groups of subjects in an absorbance test;
FIG. 2 is a graph showing the viscosity change of three liquids in a viscosity experiment for simulating flooding polymer liquid;
as shown in FIGS. 3-6, the experimental results of the electrochemical impedance of the steel surface biological membrane are shown.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations as a sequential process
Many of the operations can be performed in parallel, concurrently, or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
In the embodiment, the biological regulation and control preparation is prepared by using polymer flooding produced water collected from a victory oil field, wherein the polymer flooding produced water comprises the following components in percentage by weight: fluoride ions, wherein the concentration of the fluoride ions in the polymer flooding water is 9.26-12.0mg/L measured by F; bromide ion, wherein the concentration of the bromide ion in the polymer flooding water is 14.35-35.50mg/L calculated by Br; carbonate ion CO2- 3The concentration of the carbonate ions in the polymer flooding produced water is as CO3 2-43.33-65.52 mg/L; bicarbonate ion HCO3 -The concentration of the bicarbonate ion in the polymer flood water is HCO- 3Calculated as 2445.13-3500.50 mg/L; sulfate ion
The concentration of the sulfate ions in the polymer flood water is selected to provide a sulfate ion concentration
Calculated as 61.04-105.85 mg/L; chloride ion Cl-The concentration of the chloride ions in the polymer flooding water is 3527.02-4500.20mg/L in terms of Cl; calcium ions, wherein the concentration of the calcium ions in the polymer flooding water is 42.44-80.54mg/L calculated as Ca; magnesium ions, wherein the concentration of the magnesium ions in the polymer flooding water is 77.26-90.80Mg/L calculated by Mg; sodium ions and potassium ions, wherein the total concentration of the sodium ions and the potassium ions in the polymer flooding output water is 3092-5800mg/L in terms of Na and K; the pH value of the polymer flooding produced water is 7.77-8.15; the total amount of anaerobic bacteria in the polymer flooding produced water is (1.5-3.0) multiplied by 106The total amount of anaerobe in water per mL is 1.5X 106To 3 x 106Between each two adjacent plates; the concentration of polyacrylamide in the polymer flooding water is 500-1000 mg/L.
Example 1
The embodiment provides a biological regulation preparation for producing water by polymer flooding, which is prepared by the following steps: taking polymer flooding produced water, and removing crude oil in the polymer flooding produced water; adding nutrient substances into the polymer flooding output water after the crude oil is removed, carrying out anaerobic fermentation at the temperature of 40 +/-1 ℃, maintaining constant pressure by using nitrogen in the anaerobic fermentation process, wherein the pressure is 1MPa, and the time of the anaerobic fermentation is 84 hours, so that the fermentation liquid after the anaerobic fermentation is finished is the biological regulation and control preparation.
The nutrient substances in the embodiment comprise phosphate, ammonium salt, heavy metal salt solution and complexing acid, wherein the phosphate is NaH2PO4And K2HPO4Said NaH2PO4And K2HPO4The addition amount of the polymer flooding water is 1.2 g/L; the ammonium salt is (NH)4)2SO4Said (NH)4)2SO4The addition amount of the polymer flooding water is 0.4 g/L; the heavy metal salt solution is a mixed solution of iron salt, manganese salt, cobalt salt, zinc salt and molybdenum salt, and the total addition amount of the heavy metal salt solution in the polymer flooding output water is 1 multiplied by 10 in terms of the amount of metal ion substances-7The addition amounts of the iron salt, the manganese salt, the cobalt salt, the zinc salt and the molybdenum salt are equal to each other in terms of the amount of the metal ion, and are 0.2 multiplied by 10-7(ii) a The complexing acid is L-complexing acid, and the addition amount of the L-complexing acid in the polymer flooding water is 0.001 g/L.
Example 2
The biological regulation preparation in the embodiment is prepared by the following method: taking polymer flooding produced water, and removing crude oil in the polymer flooding produced water; adding nutrient substances into the polymer flooding output water after the crude oil is removed, carrying out anaerobic fermentation at the temperature of 40 +/-1 ℃, maintaining constant pressure by using nitrogen in the anaerobic fermentation process, wherein the pressure is 1MPa, the anaerobic fermentation time is 108 hours, and the fermentation liquid after the anaerobic fermentation is completed is the biological regulation and control preparation.
The nutrient substances in the embodiment comprise phosphate, ammonium salt, heavy metal salt solution and complexing acid, wherein the phosphate is NaH2PO4And K2HPO4Said NaH2PO4And K2HPO4The addition amount of the polymer flooding water is 1 g/L; the ammonium salt is (NH)4)2SO4Said (NH)4)2SO4The addition amount of the polymer flooding water is 0.3 g/L; the heavy metal salt solution is a mixed solution of iron salt, manganese salt, cobalt salt, zinc salt and molybdenum salt, and the total addition amount of the heavy metal salt solution in the polymer flooding output water is 1 multiplied by 10 in terms of the amount of metal ion substances-6The addition amounts of the iron salt, the manganese salt, the cobalt salt, the zinc salt and the molybdenum salt are equal to each other in terms of the amount of the metal ion, and are 0.2 multiplied by 10-6(ii) a The complexing acid is L-complexing acid, and the L-complexing acid is added into the polymer flooding waterThe amount was 0.0008 g/L.
Example 3
The biological regulation preparation in the embodiment is prepared by the following method: the biological regulation and control preparation is prepared by the following method: taking polymer flooding produced water, and removing crude oil in the polymer flooding produced water; adding nutrient substances into the polymer flooding output water after the crude oil is removed, carrying out anaerobic fermentation at the temperature of 40 +/-1 ℃, maintaining constant pressure by using nitrogen in the anaerobic fermentation process, wherein the pressure is 1MPa, the anaerobic fermentation time is 84-108 hours, and the fermentation liquid after the anaerobic fermentation is completed is the biological regulation and control preparation. This implementation
In the examples, the nutrient includes phosphate, ammonium salt, heavy metal salt solution and complexing acid, wherein the phosphate is NaH2PO4And K2HPO4Said NaH2PO4And K2HPO4The addition amount of the polymer flooding water is 1.4 g/L; the ammonium salt is (NH)4)2SO4Said (NH)4)2SO4The addition amount of the polymer flooding water is 0.5 g/L; the heavy metal salt solution is a mixed solution of iron salt, manganese salt, cobalt salt, zinc salt and molybdenum salt, and the total addition amount of the heavy metal salt solution in the polymer flooding output water is 1 multiplied by 10 in terms of the amount of metal ion substances-8The addition amounts of the iron salt, the manganese salt, the cobalt salt, the zinc salt and the molybdenum salt are equal to each other in terms of the amount of the metal ion, and are 0.2 multiplied by 10-8(ii) a The complexing acid is L-complexing acid, and the addition amount of the L-complexing acid in the polymer flooding water is 0.0012 g/L.
The crude oil in the polymer flooding produced water is removed in the above examples 1 to 3 by a standing method, that is, the polymer flooding produced water is left to stand, after oil-water separation, the crude oil on the upper layer is removed, and the water on the lower layer is retained, thereby completing the removal of the crude oil. Alternatively, other separation methods, such as centrifugation, may be selected.
Examples of the experiments
To further prove the technical effect of the biological regulation and control preparation of the invention, the experiment is set as follows in the experimental example.
First, absorbance experiment
The experiment is divided into two groups, the first group uses the biological control preparation prepared in the embodiment 1 to be reused in the polymer flooding-containing produced water, the addition amount of the biological control preparation in the polymer flooding-containing produced water is 30mL/L, after the addition is completed, the polymer flooding-containing produced water is placed in a closed state for sterilization, and the sterilization time is 10 hours. The sterilization liquid after sterilization is the experimental object of the group.
The second group was conducted with unsterilized polymer flooding water as the subject.
And simultaneously adding the biological control preparation prepared in the example 1 into the experimental subjects of the first group and the second group, wherein the addition amount of the biological control preparation in the experimental subjects is also 30 mL/L.
The absorbance of the first and second set of experiments was measured periodically during the course of the experiment and the results are shown in figure 1. Wherein the curve with the graphic symbol "x" represents the absorbance change curve of the sterilized polymer flooding produced water in the first group; the curve with the icon "represents the absorbance change of unsterilized polymer flood water in the second set. In fig. 1, the ordinate represents absorbance (in A.U.), and the abscissa represents time (in hours, h), and experimental results show that the flora in the fermentation liquor can grow rapidly in the original sewage, but the growth speed in the sterilized original water is slower than that in the original water which is not sterilized, the time required for reaching the maximum value of the bacterial quantity is longer, and the growth stability of the flora is longer.
Second, the experiment of simulating the viscosity of the oil displacing polymer liquid
The experiment is divided into three groups, the first group takes the biological control preparation prepared in the embodiment 1 to be reused in the polymer flooding produced water, the addition amount of the biological control preparation in the polymer flooding produced water is 30mL/L, after the addition is completed, the polymer flooding produced water is placed in a closed state to be sterilized, and the sterilization time is 10 hours. The sterilized sterilization liquid is the experimental object, and polyacrylamide powder is added into the sterilization liquid to prepare a solution with the concentration of polyacrylamide being 5000 mg/L. This concentration is also true
Concentration of flooding polymer liquid used in the actual field.
In the second group of experiments, clear water, namely tap water is adopted to prepare a solution, and polyacrylamide powder is added into the tap water to prepare a liquid with the concentration of polyacrylamide being 5000 mg/L.
In the third group of experiments, polymer flooding water which is not subjected to sterilization treatment is adopted, polyacrylamide powder is added into the polymer flooding water, and a solution with the concentration of polyacrylamide being 5000mg/L is prepared.
The viscosity (viscosity) of the solutions in the three sets of experiments was measured periodically, and the change of the solution viscosity (in mPa ≤) with time (in days, i.e. d) is shown in fig. 2, wherein curve "1" in fig. 2 represents the experiment results of the first set of experiments, curve "2" represents the viscosity change of the polyacrylamide solution in the second set of experiments in the clear water configuration, and curve "3" represents the viscosity change of the solution in the third set of experiments in the water configuration in which the polymer without sterilization treatment was repelled. The experimental result shows that the viscosity of the polymer is well maintained by the effluent added with the biological regulation preparation, the viscosity change of the polymer is the same as the change rule of the preparation of clear water, and the viscosity is greater than that of the clear water, so that the sulfur oxidizing bacteria metabolite in the biological regulation preparation is favorable for maintaining the viscosity of the polymer; without the addition of the bioregulatory agent, the polymer viscosity dropped rapidly as shown by curve "3". The result shows that the viscosity of the polymer is well maintained by the effluent added with the biological control preparation, the viscosity maintaining degree is one of important indexes for evaluating the performance of the oil displacing polymer liquid, and the effluent sterilized by the biological control preparation is more suitable for being reused as the oil displacing polymer liquid.
Third, biological membrane electrochemical experiment
The experiment is divided into two groups, wherein the first group is a blank group, the blank group takes polymer flooding produced water, and biological regulation and control preparations are not added into the polymer flooding produced water;
taking polymer flooding produced water from the second group, and adding the biological control preparation prepared in the example 1 into the polymer flooding produced water, wherein the addition amount of the biological control preparation in the polymer flooding produced water is 30 mL/L; the steel sheet is placed in the polymer flooding produced water in the first group and the second group at the same time, the changes of the electrochemical impedance phase angle of the biological membrane on the surface of the steel are measured at 50 hours, 90 hours, 130 hours and 150 hours after the biological regulation preparation is added, the results are sequentially shown in figures 3-6, the abscissa in figures 3-6 represents the alternating current impedance frequency, and the ordinate represents the phase angle. In the figure, a curve 2 represents the frequency corresponding to the peak position of a water sample of a blank group, a curve 1 represents the frequency corresponding to the peak position of the water sample added with a second group of biological control preparation, and the curve shows that the frequency corresponding to the phase angle peak value of the curve 1 grows on the surface of the electrode and migrates towards the high-frequency direction along with the addition of sulfur oxidizing bacteria, while the high-frequency area represents that the thickness of the film is increased and the corrosion is reduced. The comparison data with the curve "2" shows that when a large number of SRB bacteria exist in the blank group, the frequency corresponding to the maximum phase angle shifts toward the low frequency (becomes smaller), indicating that the corrosion is aggravated.
Fourth, dosage contrast experiment of biological regulation preparation
The experiment is divided into three groups, wherein the first group is a blank group, the blank group takes polymer flooding produced water, and biological regulation and control preparations are not added into the polymer flooding produced water;
taking polymer flooding produced water from the second group, and adding the biological control preparation prepared in the example 1 into the polymer flooding produced water, wherein the addition amount of the biological control preparation in the polymer flooding produced water is 30 mL/L;
and the third group takes polymer flooding produced water, and the biological control preparation prepared in the example 1 is added into the polymer flooding produced water, wherein the addition amount of the biological control preparation in the polymer flooding produced water is 40 mL/L.
The steel sheet is placed in polymer flooding water in three groups of experiments, the average corrosion rate of the steel sheet is measured after the steel sheet is placed for 7 days, and the experiment and calculation method of the average corrosion rate are carried out according to the method in the national standard GB 10124-88. The results are shown in Table 1:
TABLE 1 Corrosion rules of carbon steel for water quality after biological control agent treatment
From the above results, it can be seen that corrosion can be controlled to a minimum with the addition of 30mL/L of bioregulatory agents, and that the SRB levels are essentially completely destroyed. On the other hand, since the concentration of the nutrient salt in the bacterial liquid is relatively high, the conductivity of the medium may be increased, and thus the corrosion inhibition efficiency is almost unchanged.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A biological control preparation for producing water by polymer flooding, which is prepared by the following method: taking polymer flooding produced water, and removing crude oil in the polymer flooding produced water; adding nutrient substances into the polymer flooding output water after the crude oil is removed, and performing anaerobic fermentation at the temperature of 40 +/-1 ℃ to obtain fermentation liquor, namely the biological regulation and control preparation;
the nutrient substances comprise phosphate, ammonium salt, heavy metal salt solution and L-complex acid, wherein the addition amount of the phosphate in the polymer flooding produced water is 2-2.8g/L, the addition amount of the ammonium salt in the polymer flooding produced water is 0.3-0.5g/L, and the addition amount of the heavy metal salt solution in the polymer flooding produced water is 10 based on the amount of metal ion substances-6-10-8The addition amount of the L-complex acid in the polymer flooding water is 0.0008-0.0012 g/L;
the polymer flooding water comprises the following components: calcium ion, the concentration of the calcium ion in the polymer flooding water is 42-81 mg/L; magnesium ions, wherein the concentration of the magnesium ions in the polymer flooding water is 77-91Mg/L calculated by Mg; sodium ions and potassium ions, wherein the total concentration of the sodium ions and the potassium ions in the polymer flooding output water is 3092-5800mg/L in terms of Na and K; fluoride ions, wherein the concentration of the fluoride ions in the polymer flooding water is 9-12mg/L (measured by F); bromide, the concentration of the bromide in the polymer flooding water is 14-35mg/L calculated by Br; the pH value of the polymer flooding produced water is 7.77-8.15; the total amount of anaerobic bacteria in the polymer flooding produced water is (1.5-3) multiplied by 106Per mL; the concentration of polyacrylamide in the polymer flooding water is 500-1000 mg/L.
2. The bioregulatory formulation for polymer flooding water according to claim 1, characterized in that the phosphate is NaH2PO4And K2HPO4Said NaH2PO4And K2HPO4The addition amount of the polymer flooding water is 1.2 g/L.
3. The bioregulatory formulation for polymer flooding water according to claim 1 or 2, characterized in that the ammonium salt is (NH)4)2SO4Said (NH)4)2SO4The addition amount in the polymer flooding water was 0.4 g/L.
4. The bioregulatory formulation for polymer flooding effluent water of claim 3, wherein the heavy metal salt solution is a mixed solution of iron, manganese, cobalt, zinc, molybdenum salts.
5. The bioregulatory formulation for polymer flooding water according to claim 3, wherein the L-complexing acid is added in an amount of 0.001g/L in the polymer flooding water.
6. The bioregulatory formulation for polymer flooding water according to claim 1 or 2, characterised in that nitrogen is used to maintain a constant pressure of 1MPa during anaerobic fermentation.
7. The bioregulatory formulation for polymer flooding water according to claim 6, wherein the anaerobic fermentation time is 84-108 hours.
8. Use of the bioregulatory formulation for polymer flooding effluent of any one of claims 1-7 in a method of sterilizing polymer flooding effluent wherein the bioregulatory formulation is added to the polymer flooding effluent in an amount of 25-35 mL/L.
9. The method of using the bioregulatory formulation for polymer flooding water of claim 8 wherein the bioregulatory formulation is added to the polymer flooding water in an amount of 30mL/L and the residence time of the biocontrol agent in the polymer flooding water is greater than or equal to 1 hour.
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