CN113717707A - Environment-friendly deep nano-drainage agent for compact gas well and preparation method thereof - Google Patents
Environment-friendly deep nano-drainage agent for compact gas well and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an environment-friendly deep nano-drainage agent for a compact gas well, which comprises an oil phase, an emulsifier, an emulsion assistant, an electrolyte and water; the components are as follows by mass percent: 15-30% of oil phase, 6-12% of emulsifier, 3-7% of auxiliary emulsion low molecular alcohol, 0.3-1.2% of auxiliary emulsion low molecular organic acid, 4-12% of electrolyte and the balance of water; the average viscosity of the environment-friendly water-controlling gas-producing nano emulsion is between 2.4 and 3.2 mPa.s; the grain sizes are all less than 30nm, and the median values of the grain sizes are all between 4.2 nm and 6.5 nm; the average surface tension is lower than 21-34 mN/m; BOD5/CODcr is more than or equal to 29%, EC50 is more than 25000 mg/L; the viscosity is low, the particle size is small and the distribution is uniform, the performance is stable, the biodegradation is easy, and the biotoxicity is avoided; the method can be applied to water control and gas production of the compact gas well with complex gas/water relation.
Description
Technical Field
The invention belongs to the technical field of profile control and water shutoff of compact gas reservoirs, and particularly relates to an environment-friendly deep nano water-draining agent for a compact gas well and a preparation method thereof.
Background
Under the dual actions of the international low oil price situation and the national strict environmental protection policy, natural gas is used as a clean low-carbon fuel, so that the atmospheric environment can be effectively improved; meanwhile, the product is used as a high-quality chemical raw material and plays an important role in the development of national economy; therefore, the research strength of measures for improving the recovery ratio in the gas reservoir is also increased for oil and gas workers at home and abroad. At present, for some effluent gas wells, in order to improve the yield of the gas wells, a drainage gas production method and a water control gas production technology are generally applied on site; for drainage gas recovery methods, which mainly remove accumulated water at the bottom of a well by a process and foam, the removal of deep water in a reservoir is not completely solved, and whether an environment-friendly deep drainage method is adopted to completely and effectively remove deep water in a reservoir is adopted, so that the productivity of a gas well is improved? The problem is generally thought to be solved by gas field workers at home and abroad. If the environment-friendly deep nano drainage agent is adopted to solve the problem of gas well water outlet, the requirement of strict national environmental protection policy is met, and the pollution to the environment is reduced; therefore, the research on the environment-friendly deep nano drainage technology is necessary, which relates to the research and the development of the drainage agent.
The selection of high-efficiency water discharging agent or water control agent is one of the key problems of the implementation of water control measures of gas wells, and foreign related institutions are constantly dedicated to the research and application of improving the water control agent and the foam water discharging agent through phase permeation. In recent years, novel, low-energy-consumption, pollution-free nanomaterials have been applied to various aspects in the field of oil and gas fields due to their excellent properties such as volume, surface, quantum size and small size effects. Currently, water control agents mainly include: improved polymer cross-linking technology, polymer bridge bond adsorption technology, hydrophobic nanometer material adsorption technology, self-assembled nanometer film technology, etc. However, the water control agent mainly has the following problems in the use process of the compact gas reservoir: (1) the high molecular polymer water control system has high viscosity and is easy to cause reservoir damage; (2) the preparation process of the nano material water control system is complex, the particle size variation range is large, and the nano material water control system is difficult to adapt to a compact gas reservoir; (3) the research on a polymer water control system used in a gas reservoir mostly focuses on selective water plugging of a high-permeability reservoir, and the research on a nano-material water control system focuses on application to a mine site, so that effective guidance is provided for the application of the water control system to a low-permeability gas well, and the risk of field application is greatly increased. The patents CN200910020940.6, CN201010609172.0, CN20110609172.0, CN201210513041.1, CN201711088800.3, CN201911346774.9, CN202010460884.4 and CN202011075198.1 adopt a high-molecular polymer water control system, and the high-molecular polymer water control system has high viscosity (more than 800mPa.s), is easy to cause damage to a compact reservoir and has certain pollution to the environment. CN200310105136.0, CN200810186297.3, CN201310030473.1, and CN20170693790.x patents adopt a nano emulsion water control system formed by hydrophobic nano silica or amino silicone oil, and the emulsion water control gas production system is prepared for assistance, and has poor stability due to weak hydrophilicity, easy demulsification, short water control effective period, and difficult control of effect. The foam drainage agent mainly comprises: the modification and composite use of foaming agent can meet the drainage and gas production of different oil deposit conditions. However, the foam scrubbing agent mainly has the following problems in the use process of a dense gas reservoir: (1) the liquid foam-discharging agent needs to be diluted by water and can be attached to the well wall to cause redundant loss; (2) the solid foam discharging agent is easy to cause the phenomenon of blocking; (3) the gas source pressure of the gas well is insufficient, so that the foam is difficult to generate, and the drainage performance is reduced; (4) the foam itself is "oil sensitive", and the crude oil, after contacting the foam, spreads or emulsifies in the gas-liquid and liquid films, decreasing the stability of the foam. CN201010177121.5, CN201210047727.6, CN201310520122.9, CN201510206749.6, CN201410082682.5, CN201510321512.2, CN201510388070.3 and CN201510683387.X patents adopt temperature resistance, salt resistance or compound foaming agents to form a foam-drainage system, and the foam-drainage system has poor stability, short drainage effective period, difficult control of effect, large difficulty in processing produced liquid and high cost.
Disclosure of Invention
In order to overcome the defects of a drainage gas production method and a water control gas production technology in the prior art, the invention provides an environment-friendly deep drainage nano emulsion system for a compact gas well, which has the characteristics of convenient preparation, good injection fluidity, no pollution to the environment, wide application range and the like.
The invention relates to an environment-friendly deep nano-drainage agent for a compact gas well, which comprises an oil phase, an emulsifier, an emulsion assistant, an electrolyte and water; the components are as follows by mass percent: 15-30% of oil phase, 6-12% of emulsifier, 3-7% of auxiliary emulsion low molecular alcohol, 0.3-1.2% of auxiliary emulsion low molecular organic acid, 4-12% of electrolyte and the balance of water.
Furthermore, the oil phase is milky white solid of amino polyether modified silicone oil, and the ammonia value is 0.318-0.596 mmol/g.
Further, the base polyether modified silicone oil is ammonia-terminated polyether modified amino silicone oil, side chain polyether modified amino silicone oil, terminal-side polyether modified amino silicone oil or a mixture of the two.
Further, the emulsifier is a nonionic surfactant and is a compound emulsifier selected from octyl phenol polyoxyethylene ether (OP-15), fatty alcohol polyoxyethylene ether (AEO-15), polyethylene glycol octyl phenyl ether (X-100), polyoxyethylene sorbitan monooleate (T-80) or polyoxyethylene sorbitan monostearate (T-60).
Further, the low molecular alcohol co-emulsifier is alcohol with the carbon atom number lower than 4, and is selected from ethylene glycol, propanol, glycerol and n-butanol.
Further, the low molecular organic acid co-emulsifier is a low molecular organic acid with the carbon number lower than 3, and is selected from acetic acid, oxalic acid, propionic acid and malonic acid.
Further, the electrolyte is an alkali metal salt selected from sodium chloride and potassium chloride.
Further, the water is distilled water or deionized water.
Further, the preparation method of the compact gas well environment-friendly deep nano-drainage agent comprises the following steps:
step one, sequentially adding an emulsifier and a low molecular alcohol co-emulsifier into an oil phase at room temperature, and stirring for 20-30min at a low speed (400-;
step two, adding water with the total water amount of 10%, and continuing stirring (400- & ltSUB & gt 600r/min) for 5-10min to make the mixture uniform;
step three, adding a low molecular organic acid auxiliary emulsifier, and continuing stirring at a low speed (400-;
and step four, adding the electrolyte and the residual water, continuing stirring at a low speed (600 r/min) for 20-30min, standing for 50-60min for defoaming, and obtaining the environment-friendly nano emulsion water discharging agent.
The invention has the beneficial effects that: the environment-friendly nano-emulsion drainage agent provided by the invention has the following advantages:
1. the environment-friendly nano-emulsion drainage agent prepared by the invention has small and uniform particle size distribution, the average particle size is 3-11nm, the problem of emulsion agglomeration can be avoided, and the environment-friendly nano-emulsion drainage agent has low viscosity, stable performance and low surface interfacial tension, is easy to inject into a stratum, can obviously reduce water lock damage in gas well exploitation, and is suitable for deep drainage and gas production of a compact gas well.
2. The environment-friendly nano-emulsion water-draining agent prepared by the invention has the advantages of easily available raw materials, mild and simple process conditions and easy operation and control.
3. The raw materials adopted by the invention have the characteristic of environmental protection, the environmental protection performance of the nano emulsion is improved, and the nano emulsion conforms to the trend and the direction of the current development.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of particle size test for preparing environment-friendly nano emulsion drainage agent.
FIG. 2 is a schematic diagram showing Zeta potential results of preparing the environment-friendly nano emulsion water-repellent agent.
FIG. 3 is a static appearance diagram of the environment-friendly nano-emulsion drainage agent.
FIG. 4 is a linear relationship graph of relative luminosity and concentration for preparing the environmentally friendly nanoemulsion drainage agent.
FIG. 5-1 is a schematic view of an SEM photograph of the surface of a rock before being treated by the environment-friendly nano-emulsion water-repellent agent.
FIG. 5-2 is a schematic view of an SEM photograph of the surface of a rock treated by the environment-friendly nano-emulsion water-repellent agent.
FIG. 6-1 is a schematic view of the contact angle before treatment for preparing the environmentally friendly nanoemulsion drainage agent.
FIG. 6-2 is a schematic view of the contact angle after treatment for preparing the environmentally friendly nanoemulsion drainage agent.
FIG. 7 is a graph showing the dynamic surface tension curve for preparing an environmentally friendly nanoemulsion drainage agent.
FIG. 8 is a schematic drawing of the outflow curve in cores of the preparation of eco-friendly nanoemulsion drainage agent.
FIG. 9-1 is a schematic diagram of the relative permeability curve of the core before the action of preparing the environment-friendly nano emulsion water-repellent agent.
FIG. 9-2 is a graph showing the relative permeability curve of the core after the action of preparing the environmentally friendly nanoemulsion drainage agent.
FIG. 10-1 is a schematic view of particle size test for preparing environment-friendly nano emulsion drainage agent.
FIG. 10-2 is a schematic view of particle size test for preparing the environmental protection type nano emulsion water-repellent agent.
FIG. 11 is a schematic view of particle size test for preparing environment-friendly nano emulsion drainage agent.
FIG. 12 is a schematic view of particle size test for preparing environment-friendly nano emulsion drainage agent.
Example 1
The invention relates to an environment-friendly deep nano-drainage agent for a compact gas well, which comprises an oil phase, an emulsifier, an emulsion assistant, an electrolyte and water; the components are as follows by mass percent: 15-30% of oil phase, 6-12% of emulsifier, 3-7% of auxiliary emulsion low molecular alcohol, 0.3-1.2% of auxiliary emulsion low molecular organic acid, 4-12% of electrolyte and the balance of water.
Furthermore, the oil phase is milky white solid of amino polyether modified silicone oil, and the ammonia value is 0.318-0.596 mmol/g.
Further, the base polyether modified silicone oil is ammonia-terminated polyether modified amino silicone oil, side chain polyether modified amino silicone oil, terminal-side polyether modified amino silicone oil or a mixture of the two.
Further, the emulsifier is a nonionic surfactant and is a compound emulsifier selected from octyl phenol polyoxyethylene ether (OP-15), fatty alcohol polyoxyethylene ether (AEO-15), polyethylene glycol octyl phenyl ether (X-100), polyoxyethylene sorbitan monooleate (T-80) or polyoxyethylene sorbitan monostearate (T-60).
Further, the low molecular alcohol co-emulsifier is alcohol with the carbon atom number lower than 4, and is selected from ethylene glycol, propanol, glycerol and n-butanol.
Further, the low molecular alcohol co-emulsifier is preferably glycerol.
Further, the low molecular organic acid co-emulsifier is a low molecular organic acid with the carbon number lower than 3, and is selected from acetic acid, oxalic acid, propionic acid and malonic acid.
Further, the low molecular organic acid co-emulsifier is preferably acetic acid.
Further, the electrolyte is an alkali metal salt selected from sodium chloride and potassium chloride.
Further, the water is distilled water or deionized water.
Further, the preparation method of the compact gas well environment-friendly deep nano-drainage agent comprises the following steps:
step one, sequentially adding an emulsifier and a low molecular alcohol co-emulsifier into an oil phase at room temperature, and stirring for 20-30min at a low speed (400-;
step two, adding water with the total water amount of 10%, and continuing stirring (400- & ltSUB & gt 600r/min) for 5-10min to make the mixture uniform;
step three, adding a low molecular organic acid auxiliary emulsifier, and continuing stirring at a low speed (400-;
and step four, adding the electrolyte and the residual water, continuing stirring at a low speed (600 r/min) for 20-30min, standing for 50-60min for defoaming, and obtaining the environment-friendly nano emulsion water discharging agent.
The average viscosity of the prepared environment-friendly water-controlling gas-producing nano emulsion is between 2.4 and 3.2 mPa.s; the grain sizes are all less than 30nm, and the median values of the grain sizes are all between 4.2 nm and 6.5 nm; the average surface tension is lower than 21-34 mN/m; BOD5/CODcr is more than or equal to 29%, EC50 is more than 25000 mg/L; the viscosity is low, the particle size is small and the distribution is uniform, the performance is stable, the biodegradation is easy, and the biotoxicity is avoided; the method can be applied to water control and gas production of the compact gas well with complex gas/water relation.
In conclusion, the environment-friendly nano-emulsion drainage agent has the following advantages:
1. the environment-friendly nano-emulsion drainage agent prepared by the invention has small and uniform particle size distribution, the average particle size is 3-11nm, the problem of emulsion agglomeration can be avoided, and the environment-friendly nano-emulsion drainage agent has low viscosity, stable performance and low surface interfacial tension, is easy to inject into a stratum, can obviously reduce water lock damage in gas well exploitation, and is suitable for deep drainage and gas production of a compact gas well.
2. The environment-friendly nano-emulsion water-draining agent prepared by the invention has the advantages of easily available raw materials, mild and simple process conditions and easy operation and control.
3. The raw materials adopted by the invention have the characteristic of environmental protection, the environmental protection performance of the nano emulsion is improved, and the nano emulsion conforms to the trend and the direction of the current development.
With the continuous decline of conventional oil gas output, compact oil gas resources become the hot spot of exploration and development, and the dense gas resources of our country are abundant, distribute extensively, have all distribute in areas such as the deldos basin, the Sichuan basin, the Tarim basin, the Songliao basin, Bohai Bay, the total amount of resources that can be adopted exceeds 11 billion cubic meters.
The compact gas reservoir generally has the characteristics of low porosity (3-10%), low permeability (less than or equal to 1.0 multiplied by 10-3 mu m2), high water saturation (more than or equal to 40%), complex relation between most reservoir gas and water, certain cracks in the reservoir and the like. In the process of developing a compact gas well, a large amount of produced water is produced, the water content rises quickly, and the problems of production cost increase, environmental pollution and the like are caused by treatment and discharge of the produced water. The environment-friendly nano-emulsion drainage agent provided by the embodiment can effectively and thoroughly drain water in a reservoir and improve the productivity of a gas well.
In conclusion, the environment-friendly nano emulsion drainage gas production technology prepared by the invention has the advantages, good practical value of an oil and gas reservoir mine and wide industrial value.
Example 2
At room temperature, 20g of amino polyether modified silicone oil is placed in a 500mL beaker, 8g of octyl phenol polyoxyethylene ether (OP-15) and 6g of glycerol are added into the beaker, and the mixture is stirred at a low speed (500r/min) for 25 min; then adding distilled water with the total water amount of 10g, and continuing stirring at the rotating speed of 500r/min for 10 min; adding 0.6g of acetic acid emulsifier, and continuously stirring at the rotating speed of 500r/min for 25 min; and finally, adding 6g of NaCl and 70g of distilled water, continuously stirring at the rotating speed of 500r/min for 25min, and standing at room temperature for 60min to obtain the environment-friendly nano emulsion drainage agent.
The particle size and Zeta potential of the environment-friendly nano emulsion water-draining agent are shown in a figure 1 and a figure 2, the appearance of the environment-friendly nano emulsion prepared under different conditions after draining and standing for 1d and 7d is shown in a figure 3, the biotoxicity test is shown in a figure 4, the biodegradability evaluation is shown in a table 1, the SEM and contact angle before and after the environment-friendly nano emulsion water-draining agent is used for treating a rock core are shown in a figure 5 and a figure 6, the interfacial tension of different concentrations is shown in a figure 7, the migration rule of different concentrations in the rock core is shown in a figure 8, and the relative permeability curve of the rock core before and after the environment-friendly nano emulsion water-draining agent is used for treating the rock core is shown in a figure 9.
According to the evaluation method standard of the environment protection technology of the SYT6788-2010 water-soluble oilfield chemical agent, EC50 (25554.29 mg/L) is calculated by a regression curve of a graph 3, and the biological degradation evaluation result of a table 1 shows that the obtained nano-emulsion drainage agent is non-toxic and easy to degrade, so that the drainage agent has the advantage of green and environment-friendly performance.
TABLE 1 evaluation of biodegradation test results for preparing environment-friendly nanoemulsion drainage agent
TABLE 2 statistical table of various performance parameters for preparing environment-friendly nano emulsion water-draining agent
Example 3
At room temperature, 20g of amino polyether modified silicone oil is placed in a 500mL beaker, 10g of fatty alcohol-polyoxyethylene ether (AEO-15) and 5g of glycol are added into the beaker, and stirring is carried out at a low speed (500r/min) for 25 min; then adding distilled water with the total water amount of 10g, and continuing stirring at the rotating speed of 500r/min for 10 min; adding 0.7g propionic acid emulsifier, and stirring at 500r/min for 25 min; and finally, adding 4g of KCl and 70g of distilled water, continuously stirring at the rotating speed of 500r/min for 25min, and standing at room temperature for 60min to obtain the environment-friendly nano emulsion drainage agent.
The particle size of the environment-friendly nano-emulsion water-draining agent is shown in the figure 10, and various performance parameters are shown in the table 3.
TABLE 3 statistical table of various performance parameters for preparing environment-friendly nano emulsion water-draining agent
Example 4
At room temperature, 20g of amino polyether modified silicone oil is placed in a 500mL beaker, 8g of polyethylene glycol octyl phenyl ether (X-100) and 7g of n-butanol are added into the beaker, and the mixture is stirred at low speed (500r/min) for 25 min; then adding distilled water with the total water amount of 10g, and continuing stirring at the rotating speed of 500r/min for 10 min; adding 0.5g of oxalic acid emulsifier, and continuously stirring at the rotating speed of 500r/min for 25 min; and finally, adding 6g of NaCl and 70g of distilled water, continuously stirring at the rotating speed of 500r/min for 25min, and standing at room temperature for 60min to obtain the environment-friendly nano emulsion drainage agent.
The particle size of the environment-friendly nano-emulsion water-repellent agent is shown in the figure 10, and various performance parameters are shown in the table 4.
Table 4 statistical table of various performance parameters of the environmental protection type nano emulsion water-repellent prepared in example 3
Example 5
At room temperature, 20g of amino polyether modified silicone oil is placed in a 500mL beaker, 8g of polyoxyethylene sorbitan monooleate (T-80) and 6g of glycerol are added into the beaker, and stirring is carried out at a low speed (500r/min) for 25 min; then adding distilled water with the total water amount of 10g, and continuing stirring at the rotating speed of 500r/min for 10 min; adding 0.7g of acetic acid emulsifier, and continuously stirring at the rotating speed of 500r/min for 25 min; and finally, adding 6g of KCl and 70g of distilled water, continuously stirring at the rotating speed of 500r/min for 25min, and standing at room temperature for 60min to obtain the environment-friendly nano emulsion drainage agent.
The particle size of the environment-friendly nano-emulsion water-repellent agent is shown in a graph 11, and various performance parameters are shown in a table 5.
TABLE 5 statistical table of various performance parameters of environment-friendly nano-emulsion water-draining agent
Example 6
At room temperature, 20g of amino polyether modified silicone oil is placed in a 500mL beaker, 6g of polyoxyethylene sorbitan monooleate (T-80), 3g of polyoxyethylene sorbitan monostearate (T-60) and 6g of glycerol are added into the beaker, and stirring is carried out at a low speed (500r/min) for 25 min; then adding distilled water with the total water amount of 10g, and continuing stirring at the rotating speed of 500r/min for 10 min; adding 0.6g of acetic acid emulsifier, and continuously stirring at the rotating speed of 500r/min for 25 min; and finally, adding 6g of NaCl and 70g of distilled water, continuously stirring at the rotating speed of 500r/min for 25min, and standing at room temperature for 60min to obtain the environment-friendly nano emulsion drainage agent.
The particle size of the environment-friendly nano-emulsion water-repellent agent is shown in a graph 12, and various performance parameters are shown in a table 6.
TABLE 6 statistical table of various performance parameters of environment-friendly nano-emulsion water-draining agent
And (4) experimental conclusion: the deep nano-emulsion drainage agent prepared by the invention has no biotoxicity, is easy to biodegrade and has the environmental protection performance, the particle size of emulsion particles is small and the distribution is uniform, and the agglomeration phenomenon of the emulsion can be avoided to a greater extent; the nano emulsion has low viscosity and surface tension, is easy to inject into a reservoir, has long migration distance and meets the deep use requirement of a compact reservoir; after the compact rock core uses the environment-friendly nano emulsion, the water phase permeability is greatly improved by over 60 percent, and the gas phase permeability is reduced by within 10.5 percent. The method can accelerate the exploitation of formation water in a reservoir stratum when being used in a tight gas well, and has the function of rapid drainage; when the water injection well is used, the water injection pressure can be reduced, and the water lock phenomenon is avoided; has good application prospect.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. The utility model provides a deep nanometer water discharging agent of compact gas well environment-friendly which characterized in that: comprises an oil phase, an emulsifier, an auxiliary emulsion, an electrolyte and water; the components are as follows by mass percent: 15-30% of oil phase, 6-12% of emulsifier, 3-7% of auxiliary emulsion low molecular alcohol, 0.3-1.2% of auxiliary emulsion low molecular organic acid, 4-12% of electrolyte and the balance of water.
2. The environmentally friendly deep nano-drainage agent for a compact gas well as recited in claim 1, wherein: the oil phase is milky white solid of amino polyether modified silicone oil, and the ammonia value is 0.318-0.596 mmol/g.
3. The environmentally friendly deep nano-drainage agent for a compact gas well as defined in claim 2, wherein: the base polyether modified silicone oil is ammonia-terminated polyether modified amino silicone oil, side chain polyether modified amino silicone oil, terminal-side polyether modified amino silicone oil or a mixture of the two.
4. The environmentally friendly deep nano-drainage agent for a compact gas well as recited in claim 1, wherein: the emulsifier is a nonionic surfactant and is a compound emulsifier selected from octyl phenol polyoxyethylene ether (OP-15), fatty alcohol polyoxyethylene ether (AEO-15), polyethylene glycol octyl phenyl ether (X-100), polyoxyethylene sorbitan monooleate (T-80) or polyoxyethylene sorbitan monostearate (T-60).
5. The environmentally friendly deep nano-drainage agent for a compact gas well as recited in claim 1, wherein: the low molecular alcohol co-emulsifier is alcohol with carbon atom number less than 4, and is selected from ethylene glycol, propanol, glycerol, and n-butanol.
6. The environmentally friendly deep nano-drainage agent for a compact gas well as recited in claim 1, wherein: the low molecular organic acid co-emulsifier is a low molecular organic acid with the carbon atom number lower than 3, and is selected from acetic acid, oxalic acid, propionic acid and malonic acid.
7. The environmentally friendly deep nano-drainage agent for a compact gas well as recited in claim 1, wherein: the electrolyte is alkali metal salt selected from sodium chloride and potassium chloride.
8. The environmentally friendly deep nano-drainage agent for a compact gas well as recited in claim 1, wherein: the water is distilled water or deionized water.
9. The preparation method of the compact gas well environment-friendly deep nano-drainage agent as claimed in claims 1 to 8, characterized by comprising the following steps:
step one, sequentially adding an emulsifier and a low molecular alcohol co-emulsifier into an oil phase at room temperature, and stirring for 20-30min at a low speed (400-;
step two, adding water with the total water amount of 10%, and continuing stirring (400- & ltSUB & gt 600r/min) for 5-10min to make the mixture uniform;
step three, adding a low molecular organic acid auxiliary emulsifier, and continuing stirring at a low speed (400-;
and step four, adding the electrolyte and the residual water, continuing stirring at a low speed (600 r/min) for 20-30min, standing for 50-60min for defoaming, and obtaining the environment-friendly nano emulsion water discharging agent.
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