CN109081765A - Low temperature heavy crude reservoir chemistry auxiliary ignition agent and ignition method - Google Patents
Low temperature heavy crude reservoir chemistry auxiliary ignition agent and ignition method Download PDFInfo
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- CN109081765A CN109081765A CN201811095044.1A CN201811095044A CN109081765A CN 109081765 A CN109081765 A CN 109081765A CN 201811095044 A CN201811095044 A CN 201811095044A CN 109081765 A CN109081765 A CN 109081765A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
- C06B33/12—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being two or more oxygen-yielding compounds
- C06B33/14—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being two or more oxygen-yielding compounds at least one being an inorganic nitrogen-oxygen salt
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
- C06C15/00—Pyrophoric compositions; Flints
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
Low temperature heavy crude reservoir chemistry auxiliary ignition agent and ignition method, the component of low temperature heavy crude reservoir chemistry auxiliary ignition agent include reducing agent component, oxidant constituents and catalytic component and other components；By percentage to the quality, reducing agent amounts of components is 50-65%, and oxidant constituents dosage is 10-15%, and catalytic component dosage is 20-35%, and other amounts of components are 5-15%；The present invention carries out low temperature heavy crude reservoir using chemical auxiliary firing technology in the method for combustion in situ exploitation, after reducing agent is added, can increase combustible component and provide initial ignition energy；It can accelerate redox reaction with overheavy firing after oxidant is added and carry out；Oxidation reaction activation energy can be reduced after catalyst is added, accelerates the deposition that oxygen consumption rate changes simultaneously fuel, reduces coke zone, three's collective effect accelerates the transformation of low-temperature oxidation to high-temperature oxydation, realizes igniting.
Description
Technical field
The invention belongs to low temperature heavy crude reservoir oil recovery technique fields especially to relate to for the exploitation of viscous crude and low temperature inspissated pool
And low temperature heavy crude reservoir chemistry auxiliary ignition agent and ignition method.
Background technique
Combustion in situ is most efficient in heating exploitation method.Main application is the sticky heavy oil of exploitation.World oil
Total resources is in the majority, before global energy requirements constantly increase and routine or the crude oil available quantity being readily produced increasingly reduce
It puts, storage capacity accounts for about the heavy crude of world oil gross reserves 70%, in the following that performance is more and more important of petroleum industry
Effect.The process of combustion in situ is that note oxygen aoxidizes crude oil to oil reservoir, the heat source of combustion in situ be it is mobile, increase combustion
The operating radius of burning improves burning oil reservoir whole audience temperature uniformity.More importantly combustion adjuvant needed for combustion in situ be it is low at
This air realizes the upgrading of mink cell focus, greatly improves recovery ratio by being worth minimum heavy component in burn crude.
Combustion in situ is one of most promising method of thickened oil recovery, and the adjusting to viscous crude oxidation behavior is that exploitation combustion in situ method is suitable
With a kind of effective ways of property.
The key of situ combustion technology is that oil reservoir involuntary ignition on the spot under the auxiliary of oxidant.And in heavy-oil reservoir
Layer, since quite a few reservoir temperature is relatively low, is not achieved mink cell focus self-ignition temperature, so that oil reservoir is reached self-ignition point
Fiery temperature realizes that igniting just needs artificial lifting reservoir temperature.Common lifting reservoir temperature sparking mode has electric ignition, steam
Preheating and chemic ignition.Electric ignition burns there are equipment holding time length, easily, lights a fire the problems such as at high cost.Steam preheating
Suitable for shallow oil reservoir, a large amount of thermal energy are lost on the way for burying deeper oil reservoir, it is economically uneconomical.Chemic ignition, which utilizes, to be added
Add agent to improve situ combustion performance parameter, increase crude oil reactivity, is lifted ground in the continuous exothermic process of part crude oil
Layer temperature, ignite crude oil.
Conventional chemical firing technique generally utilizes steam to preheat, and the stratum moisture content height after heating increases igniting difficulty,
The problems such as existing simultaneously subsequent oxygen low with crude oil reaction efficiency and has channeling, it is therefore necessary to exploitation it is stable, active and
The reliable igniting agent of environmental protection.When selecting chemic ignition agent, it is contemplated that the compatibility with stratum, igniting agent should be able to be in certain temperatures
Quick spontaneous reaction down；Their calory burning is enough the region around heated well up to the ignition temperature of reservoir oil, meanwhile, point
Fiery agent can form the form of a large amount of chain tra nsfer free radicals in low temperature oxidization process, can reduce firing delay in this way；Furthermore
There should be catalytic action in component, accelerate low-temperature oxidation process, accelerate heat release.So if increase the inflammable constituent of viscous crude, it can
To accelerate viscous crude reaction rate, constantly occurring to increase crude oil reactivity in redox reaction, is making local oil reservoir heat product
The tired threshold temperature for reaching burning crude oil realizes the transformation of low-temperature oxidation to high-temperature oxydation, realizes igniting.
Therefore, it is necessary to find out a kind of new suitable chemical auxiliary ignition agent with low temperature heavy crude reservoir.
Summary of the invention
In order to overcome the defects of the prior art described above, the purpose of the present invention is to provide a kind of low temperature heavy crude reservoir chemistry is auxiliary
Igniting agent and ignition method are helped, low temperature heavy crude reservoir fast lifting can be kept close in low temperature heavy crude reservoir midpoint igneous function
Well area reservoir temperature reaches crude oil self-ignition point temperature, shortens the duration of ignition.
In order to achieve the above object, the technical solution of the present invention is as follows:
Low temperature heavy crude reservoir chemistry auxiliary ignition agent, including reducing agent component, oxidant constituents and catalytic component and
Other components；By percentage to the quality, reducing agent dosage is 50-65%, oxidizer 10-15%, and catalyst amount is
20-35%, other Ingredient Amounts are 5-15%.
The reducing agent group is divided into non-metal simple-substance carbon, magnesium metal, aluminium or its oxide, boron or boron oxide, ferrocene or
The mixture of any combination of iron powder.
The oxidant constituents are the mixture of potassium permanganate or potassium chlorate and sodium nitrate any combination.
The catalytic component is the mixture of any combination of nickel, the metal oxide of cobalt or compound.
The described other groups mixing for being divided into sulfoacid calcium, any combination of n-butanol, isopropylbenzene, itrate group ethyl nitramine
Object.
Preferably, reducing agent group is divided into non-metal simple-substance carbon, magnesium metal, aluminium or its oxide, boron oxide, ferrocene or iron
Hopcalite, mass ratio 4:7:5:2:1.5.
Preferably, oxidant constituents are the mixture of potassium permanganate and sodium nitrate, mass ratio 3:1.
Preferably, catalytic component is the mixture of nickel, the metal oxide of cobalt or compound, mass ratio 2:1.
Preferably, other ingredients be sulfoacid calcium, n-butanol, isopropylbenzene, itrate group ethyl nitramine mixture, mass ratio
For 4:10:5:3.
Based on the ignition method of above-mentioned low temperature heavy crude reservoir chemistry auxiliary ignition agent, method includes the following steps:
Step 1: isopropylbenzene is added in n-butanol first, it is added catalyst after being heated to 30-40 DEG C, after heating stirring
Itrate group ethyl nitramine is added, sulfoacid calcium is added after finally heated to 60 DEG C constant temperature, is sealed after being cooled to room temperature；
Step 2: low temperature heavy crude reservoir, the condition of low temperature heavy crude reservoir are chosen are as follows: oil reservoir prime stratum temperature is 45 DEG C,
Core intersection > 30m, reservoir permeability > 1000 × 10-3μm2, viscosity of crude<10000mPas, oil saturation>50%, oil reservoir
Depth < 1000m promotes formation temperature to 200 DEG C or more；
Step 3: being added step 1 products therefrom under nitrogen flowing, and additional amount is the 2.5wt%-3.0wt% of crude oil amount,
Oxidant is reinjected, reducing agent is eventually adding；Reducing agent addition amount is the 8.0wt%-9.0wt% of crude oil amount, and oxidant is added
Amount is the 1.5wt%-2.3wt% of crude oil amount；
Step 4: injection air, injection rate 7000Nm3/d-9000Nm3/ d, routinely combustion in situ method, recovers the oil.
Sulfoacid calcium in step 1, n-butanol, isopropylbenzene, itrate group ethyl nitramine mass ratio be 4:10:5:3.
Catalytic component is the metal oxide or compound of nickel, cobalt, mass ratio 2:1 in step 1；
Reducing agent group is divided into non-metal simple-substance carbon in step 3, magnesium metal, aluminium or its oxide, boron oxide, ferrocene or
The hopcalite of iron, mass ratio 4:7:5:2:1.5；
Oxidant constituents are potassium permanganate, sodium nitrate, mass ratio 3:1 in step 3.
Advantages of the present invention:
The present invention carries out low temperature heavy crude reservoir using chemical auxiliary firing technology being added in the method for combustion in situ exploitation
After reducing agent, combustible component can be increased and initial ignition energy is provided；It can accelerate oxygen after oxidant is added with overheavy firing
Change reduction reaction to carry out；Oxidation reaction activation energy can be reduced after catalyst is added, accelerates oxygen consumption rate and changes simultaneously fuel
Deposition reduces coke zone, and three's collective effect accelerates the transformation of low-temperature oxidation to high-temperature oxydation, realizes igniting.Furthermore oxidant
A certain amount of gas and solid product can be generated by reacting with reducing agent, can not only have been increased pressure in this way and accelerated oxidation but also can be with
Play the role of profile control closure, simultaneous oxidation agent and reducing agent should be able to be stratum delivery of supplemental oxygen and fuel, and firewire is maintained persistently to push away
Into.Igniting agent can achieve compatible with stratum and be sufficiently mixed with crude oil simultaneously, greatly improve ignition success rate.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now to skill of the invention
Art scheme carries out described further below, but should not be understood as that limiting the scope of the invention.
Embodiment one
The present embodiment low temperature heavy crude reservoir chemistry auxiliary ignition agent, including reducing agent component, oxidant constituents and catalyst
Component；By percentage to the quality, reducing agent amounts of components is 55%, and oxidant constituents dosage is 10%, catalytic component dosage
It is 25%, other amounts of components are 10%；
Reducing agent group is divided into non-metal simple-substance carbon, magnesium metal, aluminium, the mixture of boron oxide, iron powder, mass ratio 4:7:5:
2:1.5。
Oxidant constituents are the mixture of potassium permanganate, sodium nitrate, mass ratio 3:1.
Catalytic component is the mixture of nickel naphthenate and cobalt naphthenate, mass ratio 2:1.
Other groups be divided into sulfoacid calcium, n-butanol, isopropylbenzene, itrate group ethyl nitramine mixture, mass ratio 4:10:
5:3。
Based on the ignition method of above-mentioned low temperature heavy crude reservoir chemistry auxiliary ignition agent, method includes the following steps:
Step 1: isopropylbenzene is added in n-butanol first, it is added catalyst after being heated to 30-40 DEG C, after heating stirring
Itrate group ethyl nitramine is added, sulfoacid calcium is added after finally heated to 60 DEG C constant temperature, is sealed after being cooled to room temperature；
Step 2: low temperature heavy crude reservoir, the condition of low temperature heavy crude reservoir are chosen are as follows: oil reservoir prime stratum temperature is 45 DEG C,
Core intersection > 30m, reservoir permeability > 1000 × 10-3μm2, viscosity of crude<10000mPas, oil saturation>50%, oil reservoir
Depth < 1000m promotes formation temperature to 200 DEG C or more；
Step 3: being added step 1 products therefrom under nitrogen flowing, and additional amount is the 3.0wt% of crude oil amount, reinjects oxygen
Agent is eventually adding reducing agent；Reducing agent addition amount is the 8.5wt% of crude oil amount, and oxidant additional amount is crude oil amount
1.8wt%；
Step 4: injection air, injection rate 8000Nm3/ d, routinely combustion in situ method, recovers the oil.
After gas injection the 8th day, CO in combustion product is checked2Concentration is 13.8%, and oxygen concentration reduces by 3.5%, stratum
Pressure rises to 2.2MPa by 1.8MPa, it was demonstrated that lights a fire successfully.
Embodiment two
The present embodiment low temperature heavy crude reservoir chemistry auxiliary ignition agent, including reducing agent component, oxidant constituents and catalyst
Component；By percentage to the quality, reducing agent amounts of components is 50%, and oxidant constituents dosage is 15%, catalytic component dosage
It is 20%, other amounts of components are 15%；
Reducing agent group is divided into non-metal simple-substance carbon, magnesium metal, aluminium or its oxide, the oxidation of boron oxide, ferrocene or iron
The mixture of object, mass ratio 4:7:5:2:1.5.
Oxidant constituents are the mixture of potassium chlorate, sodium nitrate, mass ratio 3:1.
Catalytic component is the mixture of nickel chloride, cobalt chloride, mass ratio 2:1.
Other groups be divided into sulfoacid calcium, n-butanol, isopropylbenzene, itrate group ethyl nitramine mixture, mass ratio 5:8:
7:4。
Based on the ignition method of above-mentioned low temperature heavy crude reservoir chemistry auxiliary ignition agent, method includes the following steps:
Step 1: isopropylbenzene is added in n-butanol first, it is added catalyst after being heated to 30-40 DEG C, after heating stirring
Itrate group ethyl nitramine is added, sulfoacid calcium is added after finally heated to 60 DEG C constant temperature, is sealed after being cooled to room temperature；
Step 2: low temperature heavy crude reservoir, the condition of low temperature heavy crude reservoir are chosen are as follows: oil reservoir prime stratum temperature is 45 DEG C,
Core intersection > 30m, reservoir permeability > 1000 × 10-3μm2, viscosity of crude<10000mPas, oil saturation>50%, oil reservoir
Depth < 1000m promotes formation temperature to 200 DEG C or more；
Step 3: being added step 1 products therefrom under nitrogen flowing, and additional amount is the 2.8wt% of crude oil amount, reinjects oxygen
Agent is eventually adding reducing agent；Reducing agent addition amount is the 9.0wt% of crude oil amount, and oxidant additional amount is crude oil amount
2.0wt%；
Step 4: injection air, injection rate 7500Nm3/ d, routinely combustion in situ method, recovers the oil.
After gas injection the 15th day, CO in combustion product is checked2Concentration is 10.8%, and oxygen concentration reduces by 7.5%, stratum
Pressure rises to 2.1MPa by 1.8MPa, it was demonstrated that lights a fire successfully.
Embodiment three
The present embodiment low temperature heavy crude reservoir chemistry auxiliary ignition agent, including reducing agent component, oxidant constituents and catalyst
Component；By percentage to the quality, reducing agent amounts of components is 58%, and oxidant constituents dosage is 12%, catalytic component dosage
It is 22%, other amounts of components are 8%；
Reducing agent group is divided into non-metal simple-substance carbon, magnesium metal, aluminium, boron, ferrocene mixture, mass ratio 4:7:5:2:
1.5。
Oxidant constituents are the mixture of potassium permanganate, sodium nitrate, mass ratio 3:1.
Catalytic component is the mixture of nickel naphthenate and cobalt chloride, mass ratio 2:1.
Other ingredients be sulfoacid calcium, n-butanol, isopropylbenzene, itrate group ethyl nitramine mixture, mass ratio 4:10:
5:3。
Based on the ignition method of above-mentioned low temperature heavy crude reservoir chemistry auxiliary ignition agent, method includes the following steps:
Step 1: isopropylbenzene is added in positive fourth first, catalyst is added after being heated to 30-40 DEG C, adds after heating stirring
Enter itrate group ethyl nitramine, sulfoacid calcium is added after finally heated to 60 DEG C constant temperature, is sealed after being cooled to room temperature；
Step 2: low temperature heavy crude reservoir, the condition of low temperature heavy crude reservoir are chosen are as follows: oil reservoir prime stratum temperature is 45 DEG C,
Core intersection > 30m, reservoir permeability > 1000 × 10-3μm2, viscosity of crude<10000mPas, oil saturation>50%, oil reservoir
Depth < 1000m promotes formation temperature to 200 DEG C or more；
Step 3: being added step 1 products therefrom under nitrogen flowing, and additional amount is the 2.5wt% of crude oil amount, reinjects oxygen
Agent is eventually adding reducing agent；Reducing agent addition amount is the 8.0wt% of crude oil amount, and oxidant additional amount is crude oil amount
2.2wt%；
Step 4: injection air, injection rate 8500Nm3/ d, routinely combustion in situ method, recovers the oil.
After gas injection the 13rd day, CO in combustion product is checked2Concentration is 7.8%, and oxygen concentration reduces by 2.5%, stratum
Pressure rises to 2.3MPa by 1.8MPa, it was demonstrated that lights a fire successfully.
It is exploited using the present embodiment, about 6000 yuan/ton of cost, exploits total 200,000 yuan of input cost, economic effect
It is good, it is highly-safe, while influence of the previous exploitation to environment is greatly reduced, it is worthy to be popularized.
In conclusion the present invention can be lifted rapidly formation temperature using chemical auxiliary firing technology, change oil property,
Reach crude oil ignition point, shortens the duration of ignition, it is easier to the exploitation of low temperature viscous crude, while igniting agent burning point is low, exothermic energy is high,
Flameholding.Furthermore the igniting agent is environmentally protective, and product is pollution-free, at low cost, and property is stablized, convenient transportation.
Claims (6)
1. low temperature heavy crude reservoir chemistry auxiliary ignition agent, which is characterized in that including reducing agent component, oxidant constituents, catalyst
Component and other components；By percentage to the quality, reducing agent amounts of components is 50-65%, and oxidant constituents dosage is 10-
15%, catalytic component dosage is 20-35%, and other amounts of components are 5-15%；
The reducing agent group is divided into non-metal simple-substance carbon, magnesium metal, aluminium or its oxide, boron or boron oxide, ferrocene or iron powder
Any combination mixture；
The oxidant constituents are the mixture of potassium permanganate or potassium chlorate and sodium nitrate any combination；
The catalytic component is the mixture of any combination of nickel, the metal oxide of cobalt or compound；
The described other groups mixtures for being divided into sulfoacid calcium, any combination of n-butanol, isopropylbenzene, itrate group ethyl nitramine.
2. low temperature heavy crude reservoir chemistry auxiliary ignition agent according to claim 1, which is characterized in that reducing agent group is divided into non-
Metal simple-substance carbon, magnesium metal, aluminium or its oxide, the hopcalite of boron oxide, ferrocene or iron, mass ratio 4:7:
5:2:1.5。
3. low temperature heavy crude reservoir chemistry auxiliary ignition agent according to claim 1, which is characterized in that oxidant constituents are height
The mixture of potassium manganate and sodium nitrate, mass ratio 3:1.
4. low temperature heavy crude reservoir chemistry auxiliary ignition agent according to claim 1, which is characterized in that catalytic component is
The mixture of nickel, the metal oxide of cobalt or compound, mass ratio 2:1.
5. low temperature heavy crude reservoir chemistry auxiliary ignition agent according to claim 1, which is characterized in that other groups are divided into sulfonic acid
Calcium, n-butanol, isopropylbenzene, itrate group ethyl nitramine mixture, mass ratio 4:10:5:3.
6. the ignition method based on low temperature heavy crude reservoir chemistry auxiliary ignition agent described in claim 1, which is characterized in that this method
The following steps are included:
Step 1: isopropylbenzene is added in n-butanol first, catalyst is added after being heated to 30-40 DEG C, is added after heating stirring
Itrate group ethyl nitramine is added sulfoacid calcium after finally heated to 60 DEG C constant temperature, seals after being cooled to room temperature；
Step 2: low temperature heavy crude reservoir, the condition of low temperature heavy crude reservoir are chosen are as follows: oil reservoir prime stratum temperature is 45 DEG C, oil reservoir
Thickness > 30m, reservoir permeability > 1000 × 10-3μm2, viscosity of crude<10000mPas, oil saturation>50%, oil reservoir depth<
1000m promotes formation temperature to 200 DEG C or more；
Step 3: being added step 1 products therefrom under nitrogen flowing, and additional amount is the 2.5wt%-3.0wt% of crude oil amount, then infuses
Enter oxidant, is eventually adding reducing agent；Reducing agent addition amount is the 8.0wt%-9.0wt% of crude oil amount, and oxidant additional amount is
The 1.5wt%-2.3wt% of crude oil amount；
Step 4: injection air, injection rate 7000Nm3/d-9000Nm3/ d, routinely combustion in situ method, recovers the oil；
Sulfoacid calcium in step 1, n-butanol, isopropylbenzene, itrate group ethyl nitramine mass ratio be 4:10:5:3.
Catalytic component is the metal oxide or compound of nickel, cobalt, mass ratio 2:1 in step 1；
Reducing agent group is divided into non-metal simple-substance carbon in step 3, magnesium metal, aluminium or its oxide, boron oxide, ferrocene or iron
Hopcalite, mass ratio 4:7:5:2:1.5；
Oxidant constituents are potassium permanganate, sodium nitrate, mass ratio 3:1 in step 3.
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| CN109652040A (en) * | 2019-01-08 | 2019-04-19 | 中国石油天然气股份有限公司 | A kind of flammable sealing agent of water logging fireflood oil reservoir oil base |
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| CN109081765B (en) | 2021-12-07 |
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