CN108467718B - Preparation of clay anti-swelling agent with anti-corrosion effect for water injection - Google Patents
Preparation of clay anti-swelling agent with anti-corrosion effect for water injection Download PDFInfo
- Publication number
- CN108467718B CN108467718B CN201810397936.0A CN201810397936A CN108467718B CN 108467718 B CN108467718 B CN 108467718B CN 201810397936 A CN201810397936 A CN 201810397936A CN 108467718 B CN108467718 B CN 108467718B
- Authority
- CN
- China
- Prior art keywords
- clay
- corrosion
- swelling agent
- swelling
- water injection
- 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.)
- Expired - Fee Related
Links
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
-
- 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
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention provides preparation of a clay anti-swelling agent with an anti-corrosion effect for water injection, and discloses that an autonomously synthesized cationic surfactant has good effects of preventing clay swelling and clay particle migration and has excellent anti-scouring capability; after being compounded with the independently synthesized corrosion inhibitor, the coating has good anticorrosion effect; the clay anti-swelling agent with the functions of corrosion prevention and sterilization is obtained after the clay anti-swelling agent is compounded with diammonium hydrogen phosphate, ammonium chloride, potassium chloride and dodecyl dimethyl benzyl ammonium chloride. The clay anti-swelling agent for water injection work has good capacity of inhibiting hydration and expansion of clay, scouring resistance and excellent capacity of preventing metal corrosion, can effectively sterilize Sulfate Reducing Bacteria (SRB), saprophytic bacteria (TGB) and iron bacteria (FB), has the functions of corrosion prevention and sterilization while maintaining the main clay anti-swelling function, and has an innovative demonstration effect on developing one dose of multifunctional clay anti-swelling agent for water injection.
Description
Technical Field
The invention relates to a preparation method of a clay anti-swelling agent with an anti-corrosion effect, which is suitable for oilfield flooding operation.
Background
Oilfield flooding development is the primary means of oilfield secondary recovery. According to statistics, about 86.3 percent of oil fields in China currently adopt water injection and oil recovery, the main water source for water injection of the oil fields is oil field sewage, and water injection and oil recovery are the most effective and most economic development modes of the oil fields at present. However, as the development of water injection in oil fields is continuously carried out, due to the incompatibility of the foreign fluid and the rock minerals of reservoirs and the incompatibility of the foreign fluid and the fluids of the reservoirs, the formation is often blocked, so that the permeability of the reservoirs is reduced, the water injection pressure is continuously increased, and particularly for low-permeability reservoirs, the reservoirs are more easily damaged, so that the water injection of a water injection well is difficult, and the water injection and oil extraction effects are seriously influenced. The damage caused by incompatibility of injected water and reservoir stratum is mainly shown as follows: (ii) susceptibility impairment; invasion and blockage of solid phase particles; chemical adsorption and water lock damage caused by wettability change. The damage caused by incompatibility of injected water and reservoir fluid is mainly represented as follows: clogging and corrosion by microorganisms; clogging by corrosion; reservoir damage caused by inorganic scale; reservoir damage caused by organic precipitation; in order to prevent such damages, for example, due to the influence of emulsion clogging and free gas, various treatment agents are required to be added during the water injection operation to ensure the normal operation of the water injection.
The injected water contacts with clay minerals in the stratum to cause hydration expansion, dispersion and migration of the clay minerals, so that the throat of a stratum void structure is blocked, the stratum permeability is reduced, the reservoir is damaged, the water injection pressure is increased, the damage is the most serious, and therefore the clay anti-swelling agent needs to be continuously added.
The oil field sewage has high mineralization degree, contains a large amount of scaling salts such as calcium, magnesium, barium and silver, and the like, and dissolved oxygen and CO2And H2S and other corrosive gases have the problems of microorganism and bacteria propagation, cause serious corrosion of pipelines of water injection system equipment, further aggravate the corrosion of the water injection system, and deposit corrosion products in a reservoir to block a fluid channel and reduce the permeability of the reservoir. The corrosion inhibitor is the most feasible way to solve the problems of pipeline blockage, injection layer damage and serious system corrosion caused by oilfield flooding exploitation.
The sulfate reducing bacteria can reduce sulfate ions in water into divalent sulfur ions and simultaneously generate a byproduct H2S, and thus cause more severe corrosion than other bacteria. The propagation of sulfate reducing bacteria also produces viscous substances to cause blockage, which is also a cause of reservoir damage and water injection pressure rise, so that bactericides are often added during water injection.
In order to reduce the hydration swelling of clay minerals, the damage caused by bacteria and the damage caused by corrosion, the most effective method at present is to continuously add a clay anti-swelling agent, a bactericide and a corrosion inhibitor for preventing corrosion into the injection water.
The clay anti-swelling agent can be divided into inorganic salts, organic amines, cationic surfactants and organic cationic small molecular weight polymers according to different chemical compositions. The inorganic salts and the organic amines are low in price, have good capacity of preventing clay expansion, but have poor long-acting performance of preventing clay particles from migration and scouring; the organic cationic surfactant and the organic cationic polymer are molecules with tertiary amine or quaternary ammonium groups on molecular chains, and have strong acting force with clay minerals, so that the organic cationic surfactant and the organic cationic polymer not only have good effects of preventing hydration expansion of the clay minerals, but also have excellent effects of preventing clay particles from moving and resisting scouring, and have long-acting property.
The corrosion inhibitor for water injection is divided into an organic corrosion inhibitor and an inorganic corrosion inhibitor according to the composition. The organic corrosion inhibitor is generally composed of amines, aldehydes, alkynols, quaternary ammonium salts, organic sulfur, organic phosphorus, imidazolines, heterocyclic compounds, some surfactants and the like. Inorganic corrosion inhibitors include nitrite, nitrate, chromate, dichromate, phosphate, silicate, molybdate, polyphosphate and the like, and the inorganic corrosion inhibitors are used alone with poor effect, and are mostly used in combination with organic corrosion inhibitors at present.
The bactericides are classified into two categories, inorganic bactericides and organic bactericides, according to the difference of chemical components. Examples of the inorganic bactericide include chlorine, chlorine dioxide, and sodium hypochlorite. Examples of the organic bactericide include quaternary ammonium salts, chlorophenols, organic sulfides, and chloroamines. They are classified into oxidizing type and non-oxidizing type depending on the sterilization mechanism of the bactericide. For example, chlorine, sodium hypochlorite, chloramine, etc. are oxidizing biocides; quaternary ammonium salts, chlorophenols, dithiocyano-methane, and the like are non-oxidizing bactericides.
The clay swelling inhibitor for water injection can effectively reduce clay swelling and migration, and a corrosion inhibitor and a bactericide are separately used for overcoming the problems of corrosion and bacteria in water injection. If the clay anti-swelling agent not only has the capacity of preventing the clay from swelling and moving, but also has the functions of sterilization and corrosion prevention, the construction procedures are reduced, the using amount of the agent is saved, the cost is reduced, the water injection effect is improved, and the long-acting property of water-drive oil extraction is fully maintained.
The invention is a clay anti-swelling agent which combines the functions of preventing hydration swelling and migration of clay particles, preventing corrosion and sterilizing to develop, and has the functions of corrosion prevention and sterilization besides the clay anti-swelling function. Not only prevents the clay from expanding, prevents the corrosion of water injection to equipment and the reservoir blockage caused by corrosion products, but also prevents the blockage and the corrosion of a water injection channel caused by the propagation of bacteria, well protects the reservoir and achieves the effect of one dose of multiple effects. The invention has the following innovation points:
1. the clay anti-swelling agent has triple effects of preventing clay swelling, corrosion prevention and sterilization;
2. the synthesized cationic surfactant has good capacity of preventing clay expansion, simultaneously has the capacity of preventing clay particles from migration, has excellent anti-scouring capacity and has long-acting property;
3. the bactericidal composition is mixed with dodecyl dimethyl benzyl ammonium chloride for use, and has good bactericidal effect;
4. the synthesized corrosion inhibitor is mixed into the clay anti-swelling agent, so that the metal corrosion can be well prevented, and the operation of independently adding the corrosion inhibitor is omitted;
5. the compound mixed diammonium hydrogen phosphate not only has the capability of preventing clay from expanding, but also has a certain corrosion inhibition effect and is low in price;
6. the operation of independently adding the bactericide in the oilfield flooding is omitted, the construction strength is reduced, and the bactericide agent is saved;
7. has the function of one dose of multiple effects.
Disclosure of Invention
The clay anti-swelling agent provided by the invention has the comprehensive effects of preventing clay swelling and migration, preventing metal corrosion and sterilizing, reducing the comprehensive production effect of water injection on reservoir damage, and providing powerful scientific and technological support for energy conservation, consumption reduction, cost reduction and water injection effect improvement of oil extraction enterprises.
The purpose of the invention is realized as follows: preparing a clay anti-swelling agent with an anti-corrosion effect for water injection;
the raw materials are as follows: self-made cationic surfactant, B: self-made corrosion inhibitor, C: dodecyl dimethyl benzyl ammonium chloride, D: diammonium phosphate, E: ammonium chloride and F: potassium chloride; mixing to obtain a clay anti-swelling agent G with antiseptic and bactericidal effects;
wherein, the synthesis of the cationic surfactant A comprises the following steps:
the method is characterized in that: the raw materials are as follows: h: trimethylamine, I: epichlorohydrin; the preparation method of A is implemented by steps;
1) placing a 1000m L three-neck flask with a condenser, a glass piston constant pressure dropping funnel and a stirrer in a constant temperature water bath kettle, adding 179.1gH, stirring at a constant speed of 300 r/min, and heating to 20-30 ℃;
2) adding 92.5g I into a glass piston constant pressure dropping funnel, and dropping into a three-neck flask with H for 30-50 min; heating to 50-60 ℃ under stirring at 300 r/min, and reacting for 30-60min to obtain a reactant;
3) cooling the reactant of 2), placing the reactant into a stainless steel plate, then placing the stainless steel plate into an oven, drying the reactant for 12 hours at the temperature of 90 ℃, and crushing the reactant into powder capable of passing through a 40-mesh screen by using a YJ-400A Chinese medicinal material crusher produced by Jinan Yijian medical equipment Co.
Wherein B, the synthesis of the corrosion inhibitor:
the preparation method is characterized in that the raw materials comprise J ethylenediamine, K benzyl chloride, L sodium hydroxide and B, and the preparation method is implemented by steps;
1) dissolving 10g of L in 250m of L distilled water to prepare a sodium hydroxide solution with the mass concentration of 1mol, and placing the solution in a volumetric flask;
2) placing a 500m L three-neck flask provided with a condenser, a glass piston constant pressure dropping funnel and a stirrer in a constant temperature water bath kettle, adding 60g of distilled water or deionized water, then adding 84.1g of J, stirring at a constant speed of 300 r/min, and heating to 20-30 ℃;
3) adding 84.4g of K into a glass piston constant pressure dropping funnel, dropwise adding into a three-neck flask loaded with J aqueous solution for 20-30min, taking the solution of 1) dropwise adding into the three-neck flask by using a dropper after the dropwise adding is finished, and adjusting the pH to 12; heating to 55 ℃ under stirring at 300 revolutions per minute, and reacting for 6 hours to obtain a reactant;
4) putting the reactant of the step 3) into a stainless steel plate, then putting the stainless steel plate into an oven, drying the stainless steel plate for 12 hours at the temperature of 90 ℃, and crushing the cooled reactant into powder capable of passing through a 40-mesh screen by using a YJ-400A traditional Chinese medicine crusher produced by Jinan Yijian medical equipment Co.
Wherein, the preparation of the clay anti-swelling agent with the corrosion prevention function:
and mixing the self-made raw material A and the self-made raw material B with C, D, E and F, and uniformly mixing to prepare the clay anti-swelling agent G with the functions of corrosion prevention, corrosion inhibition and sterilization.
The mechanism and action of the invention are as follows: the cationic surfactant quaternary ammonium salt synthesized by the method has the advantages of good prevention of clay particle expansion and migration, excellent anti-scouring capability and long-acting property, and simultaneously has a certain sterilization property due to the organic ammonium cation, and the sterilization effect is better when the cationic surfactant quaternary ammonium salt is mixed with dodecyl dimethyl benzyl ammonium chloride for use. The composite inhibitor has good capability of preventing hydration expansion of clay particles when being used with diammonium hydrogen phosphate, ammonium chloride and potassium chloride, the synthesized cationic surfactant quaternary ammonium salt and dodecyl dimethyl benzyl ammonium chloride also have certain corrosion prevention effect, the corrosion inhibitor synthesized by the invention has better effect of preventing metal corrosion, and the diammonium hydrogen phosphate also has corrosion inhibition effect, so that G has excellent performances of preventing clay expansion, migration and scouring, preventing metal corrosion and sterilizing, and one agent has multiple effects.
The technical scheme of the invention is that the clay anti-swelling agent for preventing corrosion is characterized in that: the invention adopts self-made raw materials A and B, and then compounds with C, D, E and F, wherein the mass ratio of the raw materials is as follows: the clay anti-swelling agent G with the corrosion prevention function is prepared by respectively uniformly mixing A, B, C, D, E and F according to the mass ratio of 20-30 percent of F to 15-20 percent of F to 10-20 percent of 10-15 percent of 15-20 percent of E to obtain the clay anti-swelling agent G with the corrosion prevention function, so that the clay anti-swelling agent has the triple effects of clay expansion prevention, corrosion prevention and sterilization, and has one doseMultiple-effect, overcomes the defect that the common clay anti-swelling agent only has single anti-swelling effect, wherein H is respectively dissolved in tap water under each mass proportion to prepare solutions with the mass concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, the clay anti-swelling rate and the anti-washing rate compared with the tap water are respectively measured by a centrifugal method at room temperature (25 ℃), and the number of Sulfate Reducing Bacteria (SRB) is 6 × 102The number of the saprophytic bacteria (TGB) is 6 × 10 per m L3The number of the bacillus subtilis/m L and the number of the iron bacteria (FB) are 2.5 × 102The sterilizing performance of the reinjection water treated by the wastewater treatment station of the south China 21 well area of the continental girder oil field operation area of the Xinjiang oil field division company with the number of m L is evaluated according to the water quality index and the analysis method of the SY/T5329-2012 clastic rock oil reservoir water injection, and the wastewater of the SN6112 well of the south China 21 well area of the continental girder oil field operation area of the Xinjiang oil field division company has the mineralization degree of 20424.45 mg/L and Na++K+：6595.67mg/L、Mg2+：53.04mg/L、Ca2+：1083.44mg/L、SO4 2-：1838.00mg/L、Cl-10691.45 mg/L and HCO3 -325.68 mg/L, preparing simulated water, evaluating the corrosion and corrosion inhibition performance according to a corrosion inhibitor performance index and an evaluation method for SY/T5273-2014 oilfield produced water at the well temperature of 80 ℃, wherein the corrosion rate is 0.1742 mm/year, the clay anti-swelling rate is more than or equal to 82.7% at 0.3 wt%, the washing resistance rate is more than or equal to 86.5%, the corrosion rate is less than or equal to 0.0949 mm/year, the corrosion inhibition rate is more than or equal to 45.5%, the number of Sulfate Reducing Bacteria (SRB) is less than or equal to 9.5/m L, the number of saprophytic bacteria (TGB) is less than or equal to 95/m L%, the number of iron bacteria (FB) is less than or equal to 30/m L, the index requirement in the standard is met, the clay anti-swelling rate is more than or equal to 86.6%, the washing resistance rate is more than or equal to 88.4%, the corrosion rate is less than or equal to 0.1 mm/year, the corrosion inhibition rate is more than or equal to 52.3%, the number of Sulfate Reducing Bacteria (SRB) is more than or equal to 0.5%, the number of the washing resistance rate is less than or equal to 90.7.7/m, the number of the corrosion bacteria (SRB) is less than or equal to 20%, the number of the corrosion resistance rate is less than or equal to 3/m) is less than or equal to 95/4930.4%, the corrosion rate, the number of the corrosion resistance rate is greater than or equal to 0.7, the number of the corrosion rate is greater than or equal to 0.7.7The corrosion inhibitor has the advantages that the number of bacteria (TGB) is less than or equal to 70/m L, the number of iron bacteria (FB) is less than or equal to 15/m L, the comprehensive performance is excellent, the clay anti-swelling rate is greater than or equal to 93.6% at 1.0 wt%, the washing resistance rate is greater than or equal to 91.4%, the corrosion rate is less than or equal to 0.0408 mm/year, the corrosion inhibition rate is greater than or equal to 76.6%, the number of Sulfate Reducing Bacteria (SRB) is greater than or equal to 0/m L%, the number of saprophytic bacteria (TGB) is less than or equal to 65/m L, the number of iron bacteria (FB) is less than or equal to 7.5/m L, the corrosion inhibition performance is better, wherein the weight ratio of A: B: C: D: E: F: 30%: 10%: 15%: 15%:15%, the G clay anti-swelling rate is best, the corrosion inhibition performance is greater than or equal to 90.7.7% at 0.7%, the corrosion inhibition rate is greater than or equal to 15: 10: 15: 8%, the corrosion inhibition performance is greater than or equal to 15: 8%, the corrosion inhibition rate is greater than or equal to 15: 8: 15: 8%, the total corrosion inhibition rate is greater than or equal to 5: 8: 15: 8: 15: 8%, the corrosion inhibition performance is greater than or equal to 15: 8: 15: 8: 15: 8: 15.
The clay anti-swelling agent for water injection has good capability of inhibiting hydration expansion of clay, has the capability of preventing clay particles from moving, has excellent anti-scouring capability, also has excellent bactericidal performance and good corrosion and corrosion inhibition performance, the used diammonium hydrogen phosphate reduces the using amount of a cationic surfactant clay anti-swelling agent, and also has certain corrosion inhibition capability of improving a self-made corrosion inhibitor, and the agent has innovative demonstration effects on preventing clay expansion in water injection, reducing the working procedures of independent use of sterilization and corrosion inhibition, reducing the water injection cost and realizing multiple effects of one agent.
The specific implementation method comprises the following steps:
example 1: the clay anti-swelling agent G for water injection with corrosion prevention and sterilization effects is prepared by compounding a self-made A, B raw material with C, D, E and F, wherein the mass ratio of the raw materials is as follows: b, C, D, E, 15, 30, 15, B, E;
respectively dissolving G in tap water to prepare solutions with mass concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, wherein the anti-swelling rate, the anti-washing rate and the bactericidal performance are respectively realized at room temperature (25 ℃) under different concentrations, and the anti-corrosion performance in the prepared SN6112 well injection water simulation water under the temperature of 80 ℃ is as follows:
1) the anti-swelling rates at concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, respectively, were: 87.4%, 90.7%, 94.1% and 96.1%; the washing resistance rate is: 89.6%, 91.2%, 93.4% and 94.8%;
2) the concentration is 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, the number of sterilized Sulfate Reducing Bacteria (SRB) is 6.5/m L, 4/m L, 0/m L0 and 0/m L1, the number of saprophytic bacteria (TGB) is 75/m L, 70/m L, 65/m L and 60/m L, the number of iron bacteria (FB) is 20/m L, 11.5/m L, 7.5/m L and 4/m L;
3) the concentrations are respectively 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, and the corrosion rates are respectively: 0.0949 mm/year, 0.0831 mm/year, 0.0573 mm/year and 0.0408 mm/year, the corrosion inhibition rate is: 45.5%, 52.3%, 67.1% and 76.6%;
when the concentration is 0.3 wt% or more, the number of Sulfate Reducing Bacteria (SRB) is less than or equal to 6.5/m L, the number of saprophytic bacteria (TGB) is less than or equal to 75/m L, and the number of iron bacteria (FB) is less than or equal to 20/m L, thereby achieving the index requirements in the standard.
At a concentration of 0.5 wt% or more, the anti-swelling ratio is 90.7% or more and the anti-washing ratio is 91.2% or more.
When the concentration is 0.8 wt% or more, the corrosion rate is less than or equal to 0.0573 mm/year, and the corrosion inhibition rate is greater than or equal to 67.1%.
At the mass ratio, the clay has the best anti-swelling rate and anti-washing rate performance.
Example 2: the clay anti-swelling agent G for water injection with corrosion prevention and sterilization effects is prepared by compounding a self-made A, B raw material with C, D, E and F, wherein the mass ratio of the raw materials is as follows: b, C, D, 20 percent of E, 10 percent of F, 15 percent of 20 percent of 15 percent of 20 percent of D;
respectively dissolving G in tap water to prepare solutions with mass concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, wherein the anti-swelling rate, the anti-washing rate and the bactericidal performance are respectively realized at room temperature (25 ℃) under different concentrations, and the anti-corrosion performance in the prepared SN6112 well injection water simulation water under the temperature of 80 ℃ is as follows:
1) the anti-swelling rates at concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, respectively, were: 83.4%, 87.8%, 90.7% and 94.1%; the washing resistance rate is: 86.5%, 88.4%, 90.1% and 91.4%;
2) the concentration is 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, the number of sterilized Sulfate Reducing Bacteria (SRB) is 9.5/m L, 7.5/m L, 3/m L0 and 0/m L1, the number of saprophytic bacteria (TGB) is 95/m L, 75/m L, 70/m L and 65/m L, the number of iron bacteria (FB) is 30/m L, 20/m L, 15/m L and 7.5/m L;
3) the concentrations are respectively 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, and the corrosion rates are respectively: 0.0812 mm/year, 0.0688 mm/year, 0.0502 mm/year and 0.0324 mm/year, and the corrosion inhibition rate is as follows: 53.4%, 60.5%, 71.2% and 81.4%.
When the concentration is 0.3 wt% or more, the number of Sulfate Reducing Bacteria (SRB) is less than or equal to 9.5/m L, the number of saprophytic bacteria (TGB) is less than or equal to 95/m L, and the number of iron bacteria (FB) is less than or equal to 30/m L, thereby achieving the index requirements in the standard.
When the concentration is 0.8 wt% or more, the anti-swelling rate is more than or equal to 90.7%, and the anti-washing rate is more than or equal to 90.1%; the corrosion rate is less than or equal to 0.0502 mm/year, and the corrosion inhibition rate is greater than or equal to 71.2%.
Example 3: the clay anti-swelling agent G for water injection with corrosion prevention and sterilization effects is prepared by compounding a self-made A, B raw material with C, D, E and F, wherein the mass ratio of the raw materials is as follows: b, C, D, 20 percent of E, 20 percent of F, 15 percent of 10 percent of 20 percent of E;
respectively dissolving G in tap water to prepare solutions with mass concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, wherein the anti-swelling rate, the anti-washing rate and the bactericidal performance are respectively realized at room temperature (25 ℃) under different concentrations, and the anti-corrosion performance in the prepared SN6112 well injection water simulation water under the temperature of 80 ℃ is as follows:
1) the anti-swelling rates at concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, respectively, were: 82.7%, 86.6%, 90.2% and 93.6%; the washing resistance rate is: 87.8%, 89.1%, 91.4% and 92.6%;
2) the concentration is 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, the number of sterilized Sulfate Reducing Bacteria (SRB) is 4.5/m L, 3/m L, 0/m L0 and 0/m L1, the number of saprophytic bacteria (TGB) is 70/m L, 65/m L, 60/m L and 45/m L, the number of iron bacteria (FB) is 16/m L, 7.5/m L, 3/m L and 0/m L;
3) the concentrations are respectively 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, and the corrosion rates are respectively: 0.0598 mm/year, 0.0456 mm/year, 0.0328 mm/year and 0.0230 mm/year, the corrosion inhibition rate is as follows: 65.7%, 73.8%, 81.2% and 86.8%.
When the concentration is 0.3 wt% or more, the number of Sulfate Reducing Bacteria (SRB) is less than or equal to 4.5/m L, the number of saprophytic bacteria (TGB) is less than or equal to 70/m L, the number of iron bacteria (FB) is less than or equal to 16/m L, the standard index requirement is met, the corrosion rate is less than or equal to 0.0598 mm/year, and the corrosion inhibition rate is more than or equal to 65.7%.
At a concentration of 0.8 wt% or more, the anti-swelling ratio is 90.2% or more and the anti-washing ratio is 91.4% or more.
Under the quality ratio, the corrosion resistance and corrosion inhibition performance is excellent, and the sterilization performance is good.
Example 4: the clay anti-swelling agent G for water injection with corrosion prevention and sterilization effects is prepared by compounding a self-made A, B raw material with C, D, E and F, wherein the mass ratio of the raw materials is as follows: b, C, E, 15, 10, 20, wherein F is 25;
respectively dissolving G in tap water to prepare solutions with mass concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, wherein the anti-swelling rate, the anti-washing rate and the bactericidal performance are respectively realized at room temperature (25 ℃) under different concentrations, and the anti-corrosion performance in the prepared SN6112 well injection water simulation water under the temperature of 80 ℃ is as follows:
1) the anti-swelling rates at concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, respectively, were: 85.5%, 89.4%, 92.2% and 94.7%; the washing resistance rate is: 88.3%, 89.8%, 92.6% and 93.7%;
2) the concentration is 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, the number of sterilized Sulfate Reducing Bacteria (SRB) is 9.5/m L, 7/m L, 2/m L0 and 0/m L1, the number of saprophytic bacteria (TGB) is 95/m L, 75/m L, 70/m L and 65/m L, the number of iron bacteria (FB) is 25/m L, 15/m L, 11.5/m L and 6/m L;
3) the concentrations are respectively 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, and the corrosion rates are respectively: 0.0671 mm/year, 0.0537 mm/year, 0.0373 mm/year and 0.0291 mm/year, the corrosion inhibition rate is as follows: 61.5%, 69.2%, 78.6% and 83.3%.
When the concentration is 0.3 wt% or more, the number of Sulfate Reducing Bacteria (SRB) is less than or equal to 9.5/m L, the number of saprophytic bacteria (TGB) is less than or equal to 95/m L, and the number of iron bacteria (FB) is less than or equal to 25/m L, thereby achieving the index requirements in the standard.
At a concentration of 0.8 wt% or more, the anti-swelling rate is 92.2% or more and the anti-washing rate is 92.6% or more.
At a concentration of 0.3 wt% or more, the corrosion rate is 0.0671 mm/year or less, and the corrosion inhibition rate is 61.5% or more.
Example 5: the clay anti-swelling agent G for water injection with corrosion prevention and sterilization effects is prepared by compounding a self-made A, B raw material with C, D, E and F, wherein the mass ratio of the raw materials is as follows: b, C, E, 25, 15, 20, 10, 15 and 15 percent;
respectively dissolving G in tap water to prepare solutions with mass concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, wherein the anti-swelling rate, the anti-washing rate and the bactericidal performance are respectively realized at room temperature (25 ℃) under different concentrations, and the anti-corrosion performance in the prepared SN6112 well injection water simulation water under the temperature of 80 ℃ is as follows:
1) the anti-swelling rates at concentrations of 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, respectively, were: 86.8%, 90.1%, 93.0% and 95.2%; the washing resistance rate is: 89.2%, 90.6%, 93.1% and 94.1%;
2) the concentration is 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, the number of Sulfate Reducing Bacteria (SRB) after sterilization is 4.5/m L, 2/m L, 0/m L0 and 0/m L1, the number of saprophytic bacteria (TGB) is 65/m L, 60/m L, 45/m L and 40/m L, the number of iron bacteria (FB) is 15/m L, 6.5/m L, 2/m L and 0/m L;
3) the concentrations are respectively 0.3 wt%, 0.5 wt%, 0.8 wt% and 1.0 wt%, and the corrosion rates are respectively: 0.0638 mm/year, 0.0498 mm/year, 0.0347 mm/year and 0.0258 mm/year, the corrosion inhibition rate is: 63.4%, 71.4%, 80.1% and 85.2%.
When the concentration is 0.3 wt% or more, the number of Sulfate Reducing Bacteria (SRB) is less than or equal to 4.5/m L, the number of saprophytic bacteria (TGB) is less than or equal to 65/m L, the number of iron bacteria (FB) is less than or equal to 15/m L, the standard index requirement is met, the corrosion rate is less than or equal to 0.0638 mm/year, and the corrosion inhibition rate is more than or equal to 63.4%.
At a concentration of 0.5 wt% or more, the anti-swelling rate is 90.1% or more and the anti-washing rate is 90.6% or more.
Under the mass ratio, the bactericidal performance is best, and the corrosion resistance, corrosion inhibition, expansion resistance and washing resistance are excellent, so that the bactericidal composition is the best mass ratio.
The raw materials comprise a self-made cationic surfactant A, and a self-made corrosion inhibitor B adopts a raw material benzyl chloride produced by Shandong Panze chemical technology Co Ltd; trimethylamine (33%) was produced by ninthly chemicals ltd, south china, Jiangsu; epichlorohydrin, ethylenediamine, sodium hydroxide, diammonium phosphate, ammonium chloride and potassium chloride are analytically pure and are produced by a chemical reagent factory of Chengdu Kelong; dodecyl dimethyl benzyl ammonium chloride (purity 99%) was produced by sienna jia boenging biotechnology limited.
The inspection and evaluation of the product of the invention are carried out according to the following national standards: the property evaluation method of the clay stabilizer for fracturing acidification and water injection of the SY/T5971-2016 oil-gas field of the oil and gas industry standard of the people's republic of China; the oil reservoir water injection quality index and analysis method of the oil reservoir debris rock of China's republic of China' oil and gas industry standard SY/T5329 and 2012 'and the performance index and evaluation method of the corrosion inhibitor for oil field extraction water treatment of China's republic of China's oil and gas industry standard SY/T5273 and 2014'.
Claims (1)
1. A preparation method of a clay anti-swelling agent with an anti-corrosion effect for water injection is characterized by comprising the following steps:
the raw materials are as follows: cationic surfactant, B: corrosion inhibitor, C: dodecyl dimethyl benzyl ammonium chloride, D: diammonium phosphate, E: ammonium chloride and F: potassium chloride; meanwhile, the preparation method comprises the preparation of a clay anti-swelling agent G with the corrosion prevention effect;
wherein, the synthesis of the cationic surfactant A comprises the following steps:
the raw materials are as follows: h: trimethylamine, I: epichlorohydrin; the preparation method of A is implemented by steps;
1) placing a 1000m L three-neck flask with a condenser, a glass piston constant pressure dropping funnel and a stirrer in a constant temperature water bath kettle, adding 179.1gH, stirring at a constant speed of 300 r/min, and heating to 20-30 ℃;
2) adding 92.5g I into a glass piston constant pressure dropping funnel, and dropping into a three-neck flask with H for 30-50 min; heating to 50-60 ℃ under stirring at 300 r/min, and reacting for 30-60min to obtain a reactant;
3) cooling the reactant of 2), placing the cooled reactant into a stainless steel plate, then placing the stainless steel plate into an oven, drying the reactant for 12 hours at 90 ℃, cooling the reactant and crushing the reactant into powder capable of passing through a 40-mesh screen to obtain a solid cationic surfactant A;
wherein B, the synthesis of the corrosion inhibitor:
the raw materials comprise J ethylenediamine, K benzyl chloride, L sodium hydroxide and the preparation method of B is implemented by steps;
1) dissolving 10g of L in 250m of L distilled water to prepare a sodium hydroxide solution with the mass concentration of 1mol, and placing the solution in a volumetric flask;
2) placing a 500m L three-neck flask provided with a condenser, a glass piston constant pressure dropping funnel and a stirrer in a constant temperature water bath kettle, adding 60g of distilled water or deionized water, then adding 84.1g of J, stirring at a constant speed of 300 r/min, and heating to 20-30 ℃;
3) adding 84.4g of K into a glass piston constant pressure dropping funnel, dropwise adding into a three-neck flask loaded with J aqueous solution for 20-30min, taking the solution of 1) dropwise adding into the three-neck flask by using a dropper after the dropwise adding is finished, and adjusting the pH to 12; heating to 55 ℃ under stirring at 300 revolutions per minute, and reacting for 6 hours to obtain a reactant;
4) putting the reactant of the step 3) into a stainless steel plate, then putting the stainless steel plate into an oven, drying the stainless steel plate for 12 hours at the temperature of 90 ℃, cooling the stainless steel plate and then crushing the stainless steel plate into powder capable of passing through a 40-mesh screen to obtain a solid corrosion inhibitor B;
wherein, the preparation of the clay anti-swelling agent with the anti-corrosion function G comprises the following steps:
mixing the self-made raw materials A and B with C, D, E and F, wherein the mass ratio of the raw materials is as follows:
and the clay anti-swelling agent A, the clay anti-swelling agent B, the clay anti-swelling agent G and the clay anti-swelling agent G are prepared, wherein the clay anti-swelling agent A comprises the following components of (by mass ratio) F = 20-30%, 10-15%, 15-20%, 10-15% and 15-2%, and A, B, C, D, E and F are respectively uniformly mixed according to the mass ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397936.0A CN108467718B (en) | 2018-04-28 | 2018-04-28 | Preparation of clay anti-swelling agent with anti-corrosion effect for water injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810397936.0A CN108467718B (en) | 2018-04-28 | 2018-04-28 | Preparation of clay anti-swelling agent with anti-corrosion effect for water injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108467718A CN108467718A (en) | 2018-08-31 |
| CN108467718B true CN108467718B (en) | 2020-08-04 |
Family
ID=63263711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810397936.0A Expired - Fee Related CN108467718B (en) | 2018-04-28 | 2018-04-28 | Preparation of clay anti-swelling agent with anti-corrosion effect for water injection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108467718B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109880606A (en) * | 2019-03-14 | 2019-06-14 | 南京工业大学 | Corrosion inhibitor for polymer brine drilling fluid |
| CN110205105A (en) * | 2019-07-12 | 2019-09-06 | 卫辉市金龙钻采助剂有限公司 | A kind of dedicated crystal expansion-resisting agent preparation method in agglomeration resistance oil field |
| CN110577826B (en) * | 2019-11-11 | 2020-02-14 | 中国石油化工股份有限公司胜利油田分公司石油工程技术研究院 | Anti-swelling agent and preparation method thereof |
| CN111647394A (en) * | 2020-06-22 | 2020-09-11 | 保定市三拓化工产品有限公司 | Preparation method of small cation shale inhibitor |
| CN114684931A (en) * | 2020-12-28 | 2022-07-01 | 中国石油化工股份有限公司 | Corrosion inhibitor suitable for high-salt and high-chlorine working condition and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942908A (en) * | 2012-11-22 | 2013-02-27 | 中国海洋石油总公司 | Water injected pitting-corrosion composite inhibitor and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015163866A1 (en) * | 2014-04-23 | 2015-10-29 | Halliburton Energy Services, Inc. | Clay stabilization with control of migration of clays and fines |
-
2018
- 2018-04-28 CN CN201810397936.0A patent/CN108467718B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942908A (en) * | 2012-11-22 | 2013-02-27 | 中国海洋石油总公司 | Water injected pitting-corrosion composite inhibitor and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| "N-苄基乙二胺缓蚀剂的合成及缓蚀性能研究";马启睿;《应用化工》;20140531;第43卷;第1.2节 * |
| "十二烷基二甲基环氧丙基氯化铵的合成及应用研究";毛拉洁;《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》;20110615;第5页第2段 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108467718A (en) | 2018-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108467718B (en) | Preparation of clay anti-swelling agent with anti-corrosion effect for water injection | |
| Stringfellow et al. | Physical, chemical, and biological characteristics of compounds used in hydraulic fracturing | |
| US8211835B2 (en) | Composition and method for slickwater application | |
| CN101230260B (en) | Compound inhibitor for exploitation of oil-gas field and preparation method thereof | |
| CN109609110B (en) | CO (carbon monoxide)2Corrosion and scale inhibitor for oil displacement, preparation method and use method thereof | |
| MXPA05006538A (en) | Biocidal control in recovery of oil by water injection. | |
| EP2912212B1 (en) | Withanolide corrosion inhibitor for carbon steel | |
| SA517380943B1 (en) | Solid Acids for Acidizing Subterranean Formations | |
| CN105076201A (en) | Complex oilfield water flooding bactericide | |
| MX2010010834A (en) | Organic corrosion inhibitor package for organic acids. | |
| US11981862B2 (en) | Biocide composition and use thereof | |
| CN104192918A (en) | Sewage treatment agent and preparation method and application thereof | |
| CN104830299A (en) | Imidazoline-quaternary ammonium salt compound corrosion inhibitor and preparation method thereof | |
| CN105419763A (en) | Casing annulus protection fluid and preparation method thereof | |
| CN102061155B (en) | Annular protection liquid for water injection well and application of annular protection liquid | |
| CN103819011B (en) | Corrosion and scale inhibitor for oil and gas fields and petrochemical industry | |
| US10113102B2 (en) | Activity enhanced scale dispersant for treating inorganic sulfide scales | |
| CA2864203A1 (en) | Hydraulic fracturing method and fluid including in-situ boron-laden produced waters | |
| CN107636201A (en) | Corrosion inhibitor preparation | |
| CA2925634A1 (en) | Using synthetic acid compositions as alternatives to conventional acids in the oil and gas industry | |
| CN112358861A (en) | Corrosion inhibition bactericide for shale gas field | |
| RU2307798C1 (en) | Composition to inhibit salt deposition in oil production (variations) | |
| CN108611084A (en) | Complexing agent for reservoir acidification and preparation method and application thereof | |
| US20230133492A1 (en) | Iron sulfide and hydrogen sulfide treatment fluid | |
| CN109837546A (en) | Ammonium persulfate corrosion inhibiter and its application used in a kind of offshore oilfield extraction oil-piping |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200804 |