CN102162351A - Application of hydrogen peroxide to thickened oil dilution - Google Patents
Application of hydrogen peroxide to thickened oil dilution Download PDFInfo
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- CN102162351A CN102162351A CN2011100615962A CN201110061596A CN102162351A CN 102162351 A CN102162351 A CN 102162351A CN 2011100615962 A CN2011100615962 A CN 2011100615962A CN 201110061596 A CN201110061596 A CN 201110061596A CN 102162351 A CN102162351 A CN 102162351A
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Abstract
The invention discloses an application of hydrogen peroxide to thickened oil dilution and relates to the field of thickened oil dilution technology. The thickened oil dilution comprises the steps of well flushing before entering a well and changing a blowout preventer wellhead; determining quantum properties of a stabilizer and a catalyst; determining specific gravity and amount of the hydrogen peroxide and other well working fluids; determining well-entering temperature, well-entering pressure and well control order and then injecting; determining induced flow gas components and controlling; and keeping the well in a closed state. The method of the present invention reduces viscosity of the thickened oil by employing a chemical heat accumulation method instead of a conventional method of steam injection heat radiation. The invention is a revolution in extraction mode and an industrial revolution in oil extraction. The revolution greatly reduces production cost of crude oil, improves recovery efficiency of resources, restores waste oil fields, and at the same time provides a new high quality oil-displacing agent for tertiary oil recovery.
Description
Technical field:
The present invention relates to viscous crude dilution technology field, be specifically related to hydrogen peroxide and be applied to the viscous crude dilution.
Background technology:
Viscous crude is the crude oil that asphalitine and gum level are higher, viscosity is bigger.Usually the ground surface density greater than 0.943, underground viscosity viscous crude, because the density of viscous crude is big, also is called heavy oil greater than the crude oil of 50 centipoises.Viscous crude is except that the viscosity height, and density is also high, and its flowability is too poor, and the oil of thickness is difficult to from underground extraction like this.
In the oil exploitation in oil field, viscous crude has special high viscosity and high-solidification point characteristic, all runs into some technical barriers in the various aspects of development and application.With regard to production technique, colloid, asphalitine and long-chain paraffin cause the mobile variation of crude oil in reservoir and pit shaft, require to implement the tertiary oil recovery process of high investment.High sticking, high conveying of coagulating viscous crude must be adopted more powerful pumping equipment, and in order to reach rational pump displacement, requires induction system is carried out heat treated or crude oil is carried out dilution process.
Structure at features such as viscosity of thickened oil is big and each oil reservoir can be taked different oil production technology.Heavy crude reservoir water drive production technique mainly comprises the heating of mechanical viscosity reduction, pit shaft, dilution viscosity reduction, chemical viscosity reduction, microbial single well stimulation, takes out thick process matching etc.: heavy crude reservoir thermal recovery technology mainly comprises steam soak, steam flooding, clump formula directional well and horizontal well, combustion in situ and with supporting other technology of heavy crude heat extraction etc.
The difficult point of combustion in situ is that the implementing process difficulty is big, wayward underground combustion, and the cost that the while high pressure injects a large amount of air is very expensive again, and the chemical agent that the chemical viscosity reduction method adds causes the stratum severe contamination to a certain extent.
Heavy oil development is global hang-up.In energy source in China today in short supply, the viscous crude resource is undoubtedly one of very important energy of China.Most of heavy crude reservoir of China all is little fault block heavy crude reservoir basically, and this class oil reservoir belongs to low-grade petroleum resources, and crude oil property is poor, and exploitation, oil recovery, surface gathering and transferring and intractability are big.
Summary of the invention:
The purpose of this invention is to provide hydrogen peroxide and be applied to the viscous crude dilution, the mode that it makes oil production method become chemical heat build-up by the mode of present steam injection heat radiation reduces the viscosity of viscous crude, being the once change of oil production method, is an industrialization revolution in the oil extraction.This change not only greatly reduces cost of crude oil production, has improved the recovery ratio of resource, has repaired discarded oil field, has also increased a kind of high-quality oil displacement agent for tertiary oil recovery simultaneously.
In order to solve the existing problem of background technology, the present invention is by the following technical solutions: its viscous crude dilution step is: 1, go into the preceding well-flushing of well; Change Blowout prevention wellhead; Install high-precision pressure instrument and examination jet pipe line additional; 2, determine stabilizing agent, catalyzer quantum character, stabilizing agent, catalyzer are quantitative, qualitative rationally; 3, determine proportion, consumption and other working fluid of hydrogen peroxide; 4, configure into well temperature, pressure, the back injection of well control order, the size of injection rate should be injected on a small quantity by the initial stage, increased one by one, until reaching reasonable volume; 5, the gas composition of induced flow and control; 6, vexed well, and the vexed well time decide on well head pressure.
The proportion of described hydrogen peroxide is 30%.
Described stabilizing agent is a manganese dioxide, and catalyzer is potassium permanganate KMnO
4, determine the injection rate and the well time of stabilizing agent, catalyzer, hydrogen peroxide according to the well temperature of every mouthful of well, the situation of pressure.
In the described step 4, determine to inject the quantity of hydrogen peroxide according to the different well ' s conditions (temperature, pressure, oil product) of every mouthful of well, rise by about 10 tons and inject, stabilizing agent, catalyzer determine that according to the amount of hydrogen peroxide segmentation is injected, and quantize, and hand over well production after the induced flow 3 times.
The present invention has following beneficial effect:
1, input-output ratio height: steam dilution is what to carry out in the heat radiation of steam, begins loss heat to 1000 meter down-hole by the thermal source on ground, and the energy that has become hot water is the efficient that is difficult to reach higher.Hydrogen peroxide is the process of heat absorption and gathering heat in the oxidation of oil reservoir, and this different heat-supplying mode has determined that the cost for oil production of application hydrogen peroxide is very cheap.The input-output ratio of using hydrogen peroxide is 1: 5-1: 6.
2, recovery ratio height: recovery ratio is the target that energy development is pursued.Because chemical reaction is the form of three dimensional contact surface diffusion, and steam (or water) is to be advanced to stressed light directed water awl by pressure, the spread area is well below chemical reaction, and the recovery ratio of viscous crude approximately is 18% at present, and hydrogen peroxide is applied to viscous crude dilution recovery ratio and can reaches more than 50%.
3, there is repair function in discarded oil field: the application mechanism by hydrogen peroxide is not difficult to find out, uses and injects corresponding obstruction after injecting hydrogen peroxide cleaning duct first, changes the discarded oil field that reactivates that the extraction mode can success with hydrogen peroxide again.
The specific embodiment:
This specific embodiment is by the following technical solutions: its viscous crude dilution step is: 1, go into well-flushing before the well; Change Blowout prevention wellhead; Install high-precision pressure instrument and examination jet pipe line additional; 2, determine stabilizing agent, catalyzer quantum character, stabilizing agent, catalyzer are quantitative, qualitative rationally; 3, determine proportion, consumption and other working fluid of hydrogen peroxide; 4, configure into well temperature, pressure, the back injection of well control order, the size of injection rate should be injected on a small quantity by the initial stage, increased one by one, until reaching reasonable volume; 5, the gas composition of induced flow and control; 6, vexed well, and the vexed well time decide on well head pressure.
The proportion of described hydrogen peroxide is 30%.
Described stabilizing agent is a manganese dioxide, and catalyzer is potassium permanganate KMnO
4, determine the injection rate and the well time of stabilizing agent, catalyzer, hydrogen peroxide according to the well temperature of every mouthful of well, the situation of pressure.
In the described step 4, determine to inject the quantity of hydrogen peroxide according to the different well ' s conditions (temperature, pressure, oil product) of every mouthful of well, rise by about 10 tons and inject, stabilizing agent, catalyzer determine that according to the amount of hydrogen peroxide segmentation is injected, and quantize, and hand over well production after the induced flow 3 times.
In this specific embodiment, the injection rate size is a key factor, the result of laboratory test is not equal to practical application, the consumption that calculates with the data model of laboratory test is applied in bigger gap in the real work, sometimes produce the result who runs counter to desire, being applied to of hydrogen peroxide machinery is airtight, high pressure, profit mix different oil reservoirs, can be damaged oil well with security incident takes place.
Hydrogen peroxide belongs to weak acid, and pH value is 6 (293
k), now being widely used in beauty treatment and medical treatment, the purposes of hydrogen peroxide depends on the concentration and the working substance of itself.When acting on acid medium, hydrogen peroxide belongs to strong oxidizer.Except that oxidant property effect hydrogen peroxide dissociation reaction speed, solution pH value, temperature and SOLUTION PROPERTIES exert an influence to decomposition rate.Going into before the well must first well-flushing, makes the hydrogen peroxide oil reservoir assigned address that arrives safe and sound make it to produce cracking by injecting catalyst.
The mode that this specific embodiment makes oil production method become chemical heat build-up by the mode of present steam injection heat radiation reduces the viscosity of viscous crude, is the once change of oil production method, is an industrialization revolution in the oil extraction.This change not only greatly reduces cost of crude oil production, has improved the recovery ratio of resource, has repaired discarded oil field, has also increased a kind of high-quality oil displacement agent for tertiary oil recovery simultaneously.
Claims (4)
1. hydrogen peroxide is applied to the viscous crude dilution, it is characterized in that its viscous crude dilution step is: 1, go into the preceding well-flushing of well; Change Blowout prevention wellhead; Install high-precision pressure instrument and examination jet pipe line additional; 2, determine stabilizing agent, catalyzer quantum character, stabilizing agent, catalyzer are quantitative, qualitative rationally; 3, determine proportion, consumption and other working fluid of hydrogen peroxide; 4, configure into well temperature, pressure, the back injection of well control order, the size of injection rate should be injected on a small quantity by the initial stage, increased one by one, until reaching reasonable volume; 5, the gas composition of induced flow and control; 6, vexed well, and the vexed well time decide on well head pressure.
2. hydrogen peroxide according to claim 1 is applied to the viscous crude dilution, and the proportion that it is characterized in that described hydrogen peroxide is 30%.
3. hydrogen peroxide according to claim 1 is applied to the viscous crude dilution, it is characterized in that described stabilizing agent is a manganese dioxide, catalyzer is a potassium permanganate, determines the injection rate and the well time of stabilizing agent, catalyzer, hydrogen peroxide according to the well temperature of every mouthful of well, the situation of pressure.
4. hydrogen peroxide according to claim 1 is applied to the viscous crude dilution, it is characterized in that in the described step 4, determine to inject the quantity of hydrogen peroxide according to the different well ' s conditions of every mouthful of well, play injection by about 10 tons, stabilizing agent, catalyzer are determined according to the amount of hydrogen peroxide, segmentation is injected, and quantizes, and hands over well production after the induced flow 3 times.
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| CN2011100615962A CN102162351A (en) | 2011-03-15 | 2011-03-15 | Application of hydrogen peroxide to thickened oil dilution |
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| CN2011100615962A CN102162351A (en) | 2011-03-15 | 2011-03-15 | Application of hydrogen peroxide to thickened oil dilution |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883296A (en) * | 2013-12-20 | 2014-06-25 | 彭仁田 | Oxygen removal method for diluting heavy oil by injecting hydrogen peroxide |
| CN103883297A (en) * | 2013-12-20 | 2014-06-25 | 彭仁田 | Method for injecting hydrogen peroxide to dilute thickened oil by using aluminum oxide as catalyst |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883296A (en) * | 2013-12-20 | 2014-06-25 | 彭仁田 | Oxygen removal method for diluting heavy oil by injecting hydrogen peroxide |
| CN103883297A (en) * | 2013-12-20 | 2014-06-25 | 彭仁田 | Method for injecting hydrogen peroxide to dilute thickened oil by using aluminum oxide as catalyst |
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Application publication date: 20110824 |