CN106111192A - A kind of composite catalyst system and a kind of reaction system and using method thereof - Google Patents
A kind of composite catalyst system and a kind of reaction system and using method thereof Download PDFInfo
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- CN106111192A CN106111192A CN201610488019.4A CN201610488019A CN106111192A CN 106111192 A CN106111192 A CN 106111192A CN 201610488019 A CN201610488019 A CN 201610488019A CN 106111192 A CN106111192 A CN 106111192A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/04—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing carboxylic acids or their salts
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/592—Compositions used in combination with generated heat, e.g. by steam injection
Abstract
A kind of composite catalyst system, described composite catalyst system includes acidic initiator and alkalescence inhibitor；Wherein, one or more in formic acid, benzoic acid, acetic acid, oxalic acid, phthalic acid and citric acid of described acidic initiator, one or more in methylamine, triethanolamine, dimethylamine, diethylamine and ethylenediamine of described alkalescence inhibitor, described acidic initiator is 1:1 4 with the mol ratio of described alkalescence inhibitor.Additionally provide the using method of reaction system and this reaction system that can control exothermic reaction process.The composite catalyst system that the application provides so that exothermic reaction is controlled, can design the consumption of heat-generating agents according to different oil field pit shafts and formation condition；The technique achieving " being injected simultaneously into " of heat-generating agents, improves reaction efficiency and the utilization rate of medicament.
Description
Technical field
The application relates to, but are not limited to a kind of composite catalyst system and a kind of reaction system and using method thereof.
Background technology
During exploitation of oil-gas field, be frequently encountered by owing to formation temperature is the highest, cause stratum and wax deposition, crude oil without
The phenomenon of method flowing, causes cost of winning to improve, and exploitation effect is poor.Once steam injection, thermal washing, electrical heating was used for solving this problem
Etc. solving the problem of this respect, these methods are compared chemical heat and be there is many deficiencies.Chemistry Self-heating system utilizes one to two
Planting chemical agent and inject stratum, reaction generates amount of heat, makes formation temperature raise, and is dissolved by wax, and the gas simultaneously generated again may be used
To play certain de-plugging, displacement of reservoir oil effect, it is most widely used in oilfield exploitation.
During oil field produces at present, most widely used Self-heating system is sodium nitrite/ammonium chloride formula.Nitrite natrium/chlorine
The product changing ammonium Self-heating system has nitrogen, high-temperature-hot-water and sodium chloride brine.Wherein saline is lossless to most of stratum
Evil, substantial amounts of nitrogen can improve Local Layer pressure, and rinses reservoir under bigger compression shock effect, tamper and molten
Solve dirt and give rise to ground together.In terms of product, the hazardness of system is less.
Sodium nitrite/ammonium chloride is as heat-generating agents, when reality is applied, for reducing individual well cost, often by two kinds
Liquid injects into well after ground mixes, and does not use and two kinds of liquid are injected separately into down-hole mixing.Many oil-well strata temperature
All more than 60 DEG C, at a temperature of this, the time reaching peak temperature only has about 4 minutes.If using dosage is big, system is at pit shaft
Vigorous reaction can occur, release a large amount of gas and heat, heat scatters and disappears a lot at pit shaft and can not all act on stratum, in a large number
Gas make wellbore pressure raise, injection pressure is difficult to control to.
Summary of the invention
It is applied to the heat-generating agents of the stifled operation of offshore oilfield pyrolysis at present, in traditional technical process, uses more
Slug formula replaces injection mode.This mode can not be sufficiently mixed heat system, causes medicament to be wasted and reduces heat efficiency.Ratio
Comparatively ideal injection technology to meet the purpose of " ground mixedly lower reaction ".Therefore, for conservative control response time, fully profit
The heat energy released with reaction, makes two liquid not react during injecting down-hole as far as possible, arrives at formation reaction, find one to delay
The method of reaction is highly desirable to.
Present inventor develops on the basis of practical experience after numerous studies analysis can control heat release
The inhibitor of reaction process, and using temperature as control device.Composite catalyzing will be mixed under the conditions of thus may be implemented in surface temperature
Make it not occur or the most slowly react after the heat system mixing of system, and inhibitor lost efficacy under the conditions of bottom hole temperature (BHT)
And make exothermic reaction occur rapidly to reach operation purpose.Ground can be realized with this and close note technique, effectively utilize heat system,
Improve heat efficiency, strengthen technological effect.
This application provides a kind of composite catalyst system, described composite catalyst system includes acidic initiator and alkalescence suppression
Agent；Wherein, described acidic initiator one in formic acid, benzoic acid, acetic acid, oxalic acid, phthalic acid and citric acid or
Multiple, one or more in methylamine, triethanolamine, dimethylamine, diethylamine and ethylenediamine of described alkalescence inhibitor, described
Acidic initiator is 1:1-4 with the mol ratio of described alkalescence inhibitor.
In one embodiment, described acidic initiator can be citric acid, and described alkalescence inhibitor can be three second
Hydramine.
In one embodiment, described acidic initiator can be 1:2 with the mol ratio of described alkalescence inhibitor.
Present invention also provides a kind of reaction system that can control exothermic reaction process, described reaction system includes nitrous
Acid sodium/ammonium chloride heat-generating agents, and composite catalyst system as above, acid described in described composite catalyst system
The content of initiator is so that the pH of water isopyknic with described heat-generating agents is 1.7-3.5.
In one embodiment, the content of described acidic initiator can be so that with the bodies such as described heat-generating agents
The pH of long-pending water is about 2.5.
In one embodiment, sodium nitrite can be 1:1 with the mol ratio of ammonium chloride.
Present invention also provides a kind of use can control as above exothermic reaction process reaction system control put
The method of thermal response process, wherein, the component of described composite catalyst system and the component of described heat-generating agents are less than 50
At a temperature of DEG C, mixing suppression exothermic reaction is carried out；The component of described composite catalyst system and the component of described heat-generating agents
At a temperature of 50 DEG C-60 DEG C, promote after mixing that exothermic reaction is carried out.
Present invention also provides a kind of reaction system of exothermic reaction process that can control as above for oil-water well
De-plugging, the method for the displacement of reservoir oil, the method is included in described composite catalyst system under 0 DEG C-50 DEG C (alternatively, at 0 DEG C-45 DEG C)
The aqueous solution of the ammonium chloride of described acidic initiator and described heat-generating agents, described in described composite catalyst system
The aqueous solution of the sodium nitrite of alkalescence inhibitor and described heat-generating agents, by two kinds of mixed mixture intervals or
It is injected simultaneously in oil field pit shaft and stratum.
The composite catalyst system that the application provides, after adding weak base, encloses H in weak acid+Auto ionization, H+Concentration subtracts
Little, it is embodied in solution ph and raises；When solution temperature raises, the sealing effect of weak base weakens, and weak acid dissociates and increases, pH value meeting
Corresponding reduction, now H+Concentration promotes reaction to carry out.When being applied to heat system, inject add while oil well suitable weak
Acid weak base, suppression weak acid ionization, make exothermic reaction not to be smoothed out.After arriving oil reservoir, due to the rising of environment temperature, body
Being that temperature rises, weak acid ionization degree becomes big, and solution ph reduces, and becomes beneficially reacting the sour environment of initiation, promotes that heat release is anti-
Should carry out, thus realize controlling the purpose of exothermic reaction process.
Accompanying drawing explanation
Accompanying drawing is used for providing being further appreciated by technical scheme, and constitutes a part for description, with this
The embodiment of application for explaining the technical scheme of the application, is not intended that the restriction to technical scheme together.
Fig. 1 is the temperature versus time curve of the reactant liquor of embodiment 1 and comparative example 1.
Fig. 2 is the temperature versus time curve of the reactant liquor of embodiment 2 and comparative example 2.
Fig. 3 is the temperature versus time curve of the reactant liquor of embodiment 3 and comparative example 3.
Fig. 4 is the temperature versus time curve of the reactant liquor of embodiment 4 and comparative example 4.
Fig. 5 is the temperature versus time curve of the reactant liquor of embodiment 5 and comparative example 5.
Fig. 6 is the temperature versus time curve of the reactant liquor of embodiment 6 and comparative example 6.
Fig. 7 is the temperature versus time curve of the reactant liquor of comparative example 7.
Fig. 8 is the temperature versus time curve of the reactant liquor of comparative example 8.
Fig. 9 is the temperature versus time curve of the reactant liquor of comparative example 9.
Detailed description of the invention
Describe presently filed embodiment below by embodiment, it will be appreciated by the person skilled in the art that these
The enforcement technical scheme that specific embodiment only indicates that to reach the purpose of the application and selects, is not to technical scheme
Limit.According to teachings of the present application, it is obvious in conjunction with prior art to the improvement of technical scheme, belongs to the application
The scope of protection.
This application provides a kind of composite catalyst system, described composite catalyst system includes acidic initiator and alkalescence suppression
Agent；Wherein, described acidic initiator one in formic acid, benzoic acid, acetic acid, oxalic acid, phthalic acid and citric acid or
Multiple, one or more in methylamine, triethanolamine, dimethylamine, diethylamine and ethylenediamine of described alkalescence inhibitor, described
Alkalescence inhibitor is 1:1-4 with the mol ratio of described acidic initiator.
Described acidic initiator can preferably realize heat release within the above range with the mol ratio of described alkalescence inhibitor
The inhibition of reaction.In the application embodiment, described alkalescence inhibitor is permissible with the mol ratio of described acidic initiator
For 1:2.
In the application embodiment, described acidic initiator can be citric acid, and described alkalescence inhibitor can be three
Ethanolamine.
Present invention also provides a kind of reaction system that can control exothermic reaction process, described reaction system includes nitrous
Acid sodium/ammonium chloride heat-generating agents, and composite catalyst system as above, acid described in described composite catalyst system
The content of initiator is so that the pH of water isopyknic with described heat-generating agents is 1.7-3.5.It should be noted that measure
The pH of water isopyknic with described heat-generating agents is carried out at a temperature of identical with described heat-generating agents.
In the application embodiment, can be controlled by the reaction system that above-mentioned composite catalyst system is used for Self-heating
Exothermic reaction process processed.Affect a lot of because have of exothermic reaction process, such as reactant concentration, catalyst concn, reaction temperature
Degree, reactant pH value etc..In the application embodiment, described composite catalyst system utilizes control reactant pH value to control to put
Thermal response process.
Present inventor finds after great many of experiments, is controlling described chemical heat generating with described composite catalyst system
During the exothermic reaction process of system, when in described composite catalyst system the content of acidic initiator for making and described chemical heat generating
When the pH of the isopyknic water of system is 1.7-3.5, it is possible to effectively control exothermic reaction process.
In the application embodiment, the content of described acidic initiator is for making and described heat-generating agents equal-volume
The pH of water be about 2.5.
In this application, sodium nitrite can be with scope known to those skilled in the art with the mol ratio of ammonium chloride.?
In the application embodiment, sodium nitrite can be 1:1 with the mol ratio of ammonium chloride.
In the application embodiment, the heat-generating agents of described sodium nitrite and described ammonium chloride is the most usual
For sodium nitrite in aqueous solution and the mixed system of aqueous ammonium chloride solution.The concentration of sodium nitrite in aqueous solution and aqueous ammonium chloride solution can
To select according to actual needs.Alternatively, the concentration of sodium nitrite in aqueous solution and aqueous ammonium chloride solution can be respectively
3mol/L。
In this application, owing to heat-generating agents generation chemical reaction needs certain condition, typical temperature is to chemistry
The impact of reaction is bigger.At sodium nitrite/ammonium chloride heat-generating agents, at a lower temperature, sodium nitrite and ammonium chloride connect
Tactile reaction is relatively slow, but is up temperature, it will promote sodium nitrite and the reaction of ammonium chloride.Therefore, exothermic reaction to be controlled
Reaction process, needs suppression or strengthens the temperature impact on exothermic reaction.
Present invention also provides a kind of use can control as above exothermic reaction process reaction system control put
The method of thermal response process, wherein, the component of described composite catalyst system and the component of described heat-generating agents are less than 50
At a temperature of DEG C, mixing suppression exothermic reaction is carried out；The component of described composite catalyst system and the component of described heat-generating agents
At a temperature of 50 DEG C-60 DEG C, promote after mixing that exothermic reaction is carried out.
In the range of said temperature, described composite catalyst system can effectively suppress or strengthen temperature to exothermic reaction
Impact.
Present invention also provides and a kind of the reaction system that can control exothermic reaction process as above is used for profit
Well de-plugging, the method for the displacement of reservoir oil, the method be included at 0 DEG C-50 DEG C by the described acidic initiator of described composite catalyst system with
The aqueous solution of the ammonium chloride of described heat-generating agents, by the described alkalescence inhibitor of described composite catalyst system with described
Two kinds of mixed mixture are spaced or are injected simultaneously into oil field pit shaft by the aqueous solution of the sodium nitrite of heat-generating agents
And in stratum.
The composite catalyst system that the application provides, when being applied to heat system, it is suitable to add while injecting oil well
Weak acid and weak base, suppression weak acid ionization, make exothermic reaction not to be smoothed out.After arriving oil reservoir, due to the rising of environment temperature,
System temperature rises, and weak acid ionization degree becomes big, and solution ph reduces, and becomes beneficially reacting the sour environment of initiation, promotes heat release
Reaction is carried out, thus realizes controlling the purpose of exothermic reaction process.
The application, by the way of adding inhibitor, using temperature as control device, is mixed with reaction with initiator and draws
Send out the compound catalyst system and catalyzing of temperature-controllable, control optimal occurrence temperature and the opportunity of heat-generating agents reaction, effectively utilize
Thermal discharge, reduction heat loss, raising technological effect.Make exothermic reaction the most controlled by composite catalyst system, can be according to not
Same oil field pit shaft and the consumption of formation condition design heat-generating agents；Achieve " being injected simultaneously into " of heat-generating agents
Technique, improves reaction efficiency and the utilization rate of medicament.
In following example, agents useful for same is all from Chemical Reagent Co., Ltd., Sinopharm Group, identical reagent source phase
With.
The temperature of reactant liquor is measured by thermocouple temperature sensor.
Embodiment 1
At 25 DEG C, 8.025g ammonium chloride is dissolved in 50mL water, in aqueous ammonium chloride solution, adds 0.105g citric acid
Form mixed liquor；10.35g sodium nitrite is dissolved in 50mL water, in sodium nitrite in aqueous solution add with citric acid mole
Triethanolamine than respectively 1:1,1:2,1:4 forms mixed liquor；Two kinds of mixed liquors are mixed to form reactant liquor.
Wherein, the addition of citric acid makes the pH value of 100mL water be 2.64.By observing, the temperature of reactant liquor is at any time
Between change as shown in Figure 1.
As can be seen from Figure 1: when acid/base ratio is 1:1, can effectively postpone the time that temperature peak reaches, about 4000s
Left and right.And when acid/base ratio is 1:2 and 1:4, it is possible to substantially the carrying out of suppression reaction.
Comparative example 1
The method using embodiment 1, except for the difference that, citric acid is 2:1 with the mol ratio of triethanolamine；Or it is added without three
Ethanolamine, i.e. only acid exists.The temperature of reactant liquor is the most as shown in Figure 1.
During it will be seen from figure 1 that the mol ratio of citric acid and triethanolamine is 2:1, from the beginning of 1000s, temperature and Fructus Citri Limoniae
Compared with when acid is 1:1 with the mol ratio of triethanolamine, there is the trend of substantially rising.The system that acid content is higher is described, unfavorable
In the process controlling reaction.
Embodiment 2
The method using embodiment 1, except for the difference that, the addition of citric acid makes the pH value of 100mL water be 2.34.Pass through
Observing, the temperature of reactant liquor is the most as shown in Figure 2.
As can be seen from Figure 2: when acid/base ratio is 1:1, can effectively postpone the time that temperature peak reaches, about 2000s
Left and right.And when acid/base ratio is 1:2, it is possible to the time that substantially postponement temperature peak reaches is more than 2000s；And work as acid/base ratio
During for 1:4, hence it is evident that the carrying out of suppression reaction.
Comparative example 2
The method using embodiment 2, except for the difference that, citric acid is 2:1 with the mol ratio of triethanolamine；Or it is added without three
Ethanolamine.By observing, the temperature of reactant liquor is the most as shown in Figure 2.
Figure it is seen that compared to comprising only sour system, there is the 900s around of peak value in reaction temperature.And
When the mol ratio of citric acid and triethanolamine is 2:1, from the beginning of 400s, temperature is 1 with the mol ratio of citric acid with triethanolamine:
Compare when 1, there is the trend of substantially rising.The rising of the concentration of acid is described, is unfavorable for controlling the process of reaction.
Embodiment 3
The method using embodiment 1, except for the difference that, the addition of citric acid makes the pH value of 100mL water be 2.22.Pass through
Observing, the temperature of reactant liquor is the most as shown in Figure 3.
As can be seen from Figure 3: when acid/base ratio is 1:1, the time that temperature peak reaches, about about 1800s, and when acid
When alkali ratio is 1:2, it is possible to the time that substantially postponement temperature peak reaches is more than 1800s；When acid/base ratio is 1:4, hence it is evident that
The carrying out of suppression reaction.
Comparative example 3
The method using embodiment 3, except for the difference that, citric acid is 2:1 with the mol ratio of triethanolamine；Or it is added without three
Ethanolamine.By observing, the temperature of reactant liquor is the most as shown in Figure 3.
From figure 3, it can be seen that comprise only the system of acid, there is the 600s around of peak value in reaction temperature.And citric acid
When being 2:1 with the mol ratio of triethanolamine, from the beginning of 100s, temperature is 1:1 phase with the mol ratio of citric acid with triethanolamine
Ratio, has the trend of substantially rising.Compared with Fig. 2, the rising of the concentration of acid is described, is unfavorable for effectively controlling the process of reaction.
Also illustrate, the composite catalyst system of the application, it is possible to the effective process controlling exothermic reaction simultaneously.
Embodiment 4
The method using embodiment 1, except for the difference that, initial temperature is 45 DEG C.By observing, the temperature of reactant liquor is in time
Change as shown in Figure 4.
From fig. 4, it can be seen that when acid/base ratio is 1:2, peak value can be postponed in the case of ensureing peak temperature and reach
Time about 1400s.When acid/base ratio is 1:1, can effectively postpone the time that temperature peak reaches, about about 1000s.And when acid
When alkali ratio is 1:4, it is possible to substantially the carrying out of suppression reaction.
Comparative example 4
The method using embodiment 4, except for the difference that, is added without triethanolamine；Or citric acid and triethanolamine mole
Ratio is 2:1.By observing, the temperature of reactant liquor is the most as shown in Figure 4.
From fig. 4, it can be seen that comprise only acid system, and soda acid than the system reaction temperature for 2:1 occur peak value time
Between close, at about 600s, the more process being unfavorable for effectively controlling reaction of acid content is described.
Embodiment 5
The method using embodiment 4, except for the difference that, the addition of citric acid makes the pH value of 100mL water be 1.94.Pass through
Observing, the temperature of reactant liquor is the most as shown in Figure 5.
During from fig. 5, it can be seen that acid/base ratio is 1:1, temperature occurs that the time of peak value is reduced to about 500s, and when acid
When alkali ratio is 1:2, remain able to effectively play the effect that delayed response is carried out.And soda acid is when being 1:4, remain able to effectively press down
The carrying out of system reaction.
Comparative example 5
The method using embodiment 5, except for the difference that, is added without triethanolamine；Or citric acid and triethanolamine mole
Ratio is 2:1.By observing, the temperature of reactant liquor is the most as shown in Figure 5.
From fig. 5, it can be seen that under higher initial reaction temperature, when the mass concentration of employing citric acid is 0.3%, acid
Alkali ratio is during for 2:1, and the system comprising only acid around of peak value occurs in reaction temperature.Higher temperature and higher acid are described
Content, is unfavorable for controlling the process of reaction.
Embodiment 6
The method using embodiment 5, except for the difference that, the addition of citric acid makes the pH value of 100mL water be 1.78.Pass through
Observing, the temperature of reactant liquor is the most as shown in Figure 6.
As can be seen from Figure 6: when acid/base ratio is 1:1, remain able to effectively play the effect that delayed response is carried out, peak
Value reaches time about 700s；When acid/base ratio is 1:2, peak value reaches time about 1400s.And soda acid is when being 1:4, remain able to
Effectively the carrying out of suppression reaction.
Comparative example 6
The method using embodiment 6, except for the difference that, is added without triethanolamine；Or citric acid and triethanolamine mole
Ratio is 2:1.By observing, the temperature of reactant liquor is the most as shown in Figure 6.
From fig. 6, it can be seen that comprise only acid system, and soda acid than the system reaction temperature for 2:1 occur peak value time
Between close, at about 200s, the more process being unfavorable for controlling reaction of acid content is described.
Comparative example 7
The method using embodiment 1, except for the difference that, initial temperature is respectively 25 DEG C, 45 DEG C, 60 DEG C and 75 DEG C, is added without
Triethanolamine.By observing, the temperature of reactant liquor is the most as shown in Figure 7.
From figure 7 it can be seen that compared with the 600s that 45 DEG C of initial temperature distances occur vigorous reaction, initial temperature is respectively
60 DEG C and 75 DEG C of times reacted, almost in 100s, illustrate, initial temperature is more than 60 DEG C, be unfavorable for control react into
Journey.
Comparative example 8
The method using comparative example 7, except for the difference that, the addition of citric acid makes the pH value of 100mL water be respectively 2.34,
1.94、1.67、1.56.By observing, the temperature of reactant liquor is the most as shown in Figure 8.
During from figure 8, it is seen that initial temperature is respectively 60 DEG C and 75 DEG C, there is the time of peak value at 100s in reaction temperature
In.And compared with Fig. 7, reaction temperature occurs that the time of peak value is obviously prolonged.Illustrate, along with the concentration liter of acidic initiator
Height, is unfavorable for controlling reaction process.
Comparative example 9
The method using comparative example 7, except for the difference that, the addition of citric acid makes the pH value of 100mL water be respectively 2.22,
1.78、1.54、1.33.By observing, the temperature of reactant liquor is the most as shown in Figure 9.
During from fig. 9, it can be seen that initial temperature is respectively 60 DEG C and 75 DEG C, there is the time of peak value at 100s in reaction temperature
In.And compared with Fig. 2, reaction temperature occurs that peak value is around.Illustrate, compared with the concentration of acidic initiator, initially
The impact of reaction process is become apparent from by temperature.
Application Example 1
The reaction system of embodiment 1 is used for Bohai Bay Oil B5 well.Use ground to close note mode, connect tool at ground well head
Having a tee pipe fitting of two pipelines, wherein pipelined mixture has the mixed liquor of citric acid and aqueous ammonium chloride solution, another
Bar pipelined mixture has the mixed liquor of triethanolamine and sodium nitrite in aqueous solution, and the material of two pipelineds is at tee pipe fitting
Pit shaft is injected after place's mixing.Surface temperature 18 DEG C, formation temperature 62 DEG C, aqueous ammonium chloride solution and the concentration of sodium nitrite in aqueous solution
It is respectively 3mol/L；Sodium nitrite is 1:1 with the mol ratio of ammonium chloride；Citric acid and triethanolamine mol ratio are 1:2.Fructus Citri Limoniae
The consumption of acid is so that being 3.5 with the pH of ammonium chloride and the isopyknic water of sodium nitrite system.Pit shaft inner volume 7m3, inject speed
Degree 20m3/ h (needs 20min from ground to stratum), and in injection process, in wellbore section, injection pressure does not raise, and inhibitor is described
There is the initiation having delayed reaction；Occur in that the phenomenon of boosting after the implantation during phase (general 260min), illustrate that system liquid enters
Behind stratum, inhibitor inefficacy has caused exothermic reaction, association tolerance increase to cause injection pressure to raise at the formation temperature.
As can be seen from the above embodiments, the composite catalyst system that the application provides, it is possible to effectively control exothermic reaction
Process, it is achieved that make it not occur or the slowest after mixing the heat system mixing of composite catalyst system under the conditions of surface temperature
React, and inhibitor lost efficacy and made exothermic reaction occur rapidly to reach operation purpose under the conditions of bottom hole temperature (BHT).Thus
Realize ground and close note technique, effectively utilize heat system, improve heat efficiency, strengthen technological effect.
Although the embodiment disclosed by the application is as above, but described content only readily appreciates that the application uses
Embodiment, is not limited to the application.Technical staff in any the application art, is being taken off without departing from the application
On the premise of the spirit and scope of dew, any amendment and change can be carried out in the form implemented and details, but the application
Scope of patent protection, still must be defined in the range of standard with appending claims.
Claims (8)
1. a composite catalyst system, described composite catalyst system includes acidic initiator and alkalescence inhibitor；Wherein, described acid
Property one or more in formic acid, benzoic acid, acetic acid, oxalic acid, phthalic acid and citric acid of initiator, described alkalescence presses down
One or more in methylamine, triethanolamine, dimethylamine, diethylamine and ethylenediamine of preparation, described acidic initiator and institute
The mol ratio stating alkalescence inhibitor is 1:1-4.
2. composite catalyst system as claimed in claim 1, wherein, described acidic initiator is citric acid, described alkalescence suppression
Agent is triethanolamine.
3. composite catalyst system as claimed in claim 1, wherein, described acidic initiator and described alkalescence inhibitor mole
Ratio is 1:2.
4. can control a reaction system for exothermic reaction process, described reaction system includes sodium nitrite/ammonium chloride chemistry
Heat system, and the composite catalyst system according to any one of claim 1-3, acid described in described composite catalyst system
The content of initiator is so that the pH of water isopyknic with described heat-generating agents is 1.7-3.5.
5. reaction system as claimed in claim 4, wherein, the content of described acidic initiator is for making and described chemical heat generating
The pH of the isopyknic water of system is about 2.5.
6. reaction system as claimed in claim 4, wherein, sodium nitrite is 1:1 with the mol ratio of ammonium chloride.
7. the reaction system of the exothermic reaction process that can control used as according to any one of claim 4-6 controls to put
The method of thermal response process, wherein, the component of described composite catalyst system and the component of described heat-generating agents are less than 50
At a temperature of DEG C, mixing suppression exothermic reaction is carried out；The component of described composite catalyst system and the component of described heat-generating agents
At a temperature of 50 DEG C-60 DEG C, promote after mixing that exothermic reaction is carried out.
8. the reaction system that can control exothermic reaction process as according to any one of claim 4-6 is for oil-water well
De-plugging, the method for the displacement of reservoir oil, the method is included in the described acidic initiator of described composite catalyst system and institute at 0 DEG C-50 DEG C
State the aqueous solution of the ammonium chloride of heat-generating agents, by described alkalescence inhibitor and describedization of described composite catalyst system
The aqueous solution of the sodium nitrite of student's hot system, by two kinds of mixed mixture interval or be injected simultaneously into oil field pit shaft and
In stratum.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610488019.4A CN106111192B (en) | 2016-06-28 | 2016-06-28 | A kind of composite catalyst system and a kind of reaction system and its application method |
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| CN201610488019.4A CN106111192B (en) | 2016-06-28 | 2016-06-28 | A kind of composite catalyst system and a kind of reaction system and its application method |
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| CN106111192A true CN106111192A (en) | 2016-11-16 |
| CN106111192B CN106111192B (en) | 2019-05-28 |
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| CN201610488019.4A Active CN106111192B (en) | 2016-06-28 | 2016-06-28 | A kind of composite catalyst system and a kind of reaction system and its application method |
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