CN104073233B - Self-heat generation chemical temperature rise agent for alkaline thickened oil reservoir and use method - Google Patents
Self-heat generation chemical temperature rise agent for alkaline thickened oil reservoir and use method Download PDFInfo
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Abstract
The invention discloses a self-heat generation chemical temperature rise agent for an alkaline thickened oil reservoir, which comprises a heat generation agent and a trigger agent, wherein the heat generation agent comprises aluminum powder with a particle size no greater than 400 meshes, and a wrapping layer for wrapping the aluminum powder; the trigger agent is an NaOh aqueous solution; a ratio of mass of the aluminum powder to the mass of NaOH in the NaOH aqueous solution is 1:(1.0-2.5); and the wrapping layer is a paraffin or aluminum stearate wrapping layer. In addition, the invention further discloses a use method of the self-heat generation heat chemical temperature rise agent. The self-heat generation chemical temperature rise agent has the advantages of high heat generation efficiency, safe and reliable reservoir transportation and injection process, quick temperature sensitivity trigger, good carrying and injection effect and the like, and is applicable to self-heat generation temperature rise synergism development in the alkaline thickened oil reservoir and the thickened oil reservoir with a penetration rate greater than 500*10＜-3＞ cubic micrometers and oil reservoir temperature higher than 60 DEG C.
Description
Technical field
The invention belongs to Self-heating synergy development technique field in alkaline thick oil reservoir, and in particular to a kind of thick for alkalescence
The spontaneous heat chemistry temperature raising medicament of oily reservoir and using method.
Background technology
Viscous crude aboundresources development significance is great, a distinguishing feature of heavy crude reservoir be under formation conditions, viscous crude
Viscosity is high, relatively denser, fluid ability is poor, thus is difficult to cost-effectively develop with routine techniques.But the viscosity pair of viscous crude
Temperature is very sensitive, i.e., temperature is raised and significantly reduced, and viscosity is higher, and fall is bigger, now viscous crude flowing
When tend to Newtonian fluid, this is the important thermophysical property of viscous crude, and the basic foundation of oil recovery by heating.At present both at home and abroad with steaming
Vapour drives and steam soak mainly exploits means for which, too small for effective radius of influence present in heavy oil exploitation via steam injection process
Problem, with reference to space flight navigational field high heat density fuel technology, propose to the under-effected formation at target locations injectionization of steam
The auxiliary temperature raising of student's thermit powder is theoretical, with spontaneous thermal response in the layer under the conditions of realizing heavy oil cold flow production and steam injection, effectively reduces layer
Interior viscosity of crude, improves mobility, further promote it is cold adopt and the heavy crude heat extraction technology such as steam soak or hydrothermal cracking exploitation
Effect.
The relatively broad spontaneous hot system of field use has nitrite and ammonium salt heat system, H at present2O2Heat system,
The oxidation of aldehydes heat system of polyhydroxy, due to its exothermal efficiency, the aspect restriction of injection safety and stability etc., which is applied mostly in pressure
Split the aspects such as liquid, pit shaft heat paraffin removal, it is difficult to realize Self-heating temperature raising in reservoir internal porous medium.Thus, viscous crude Self-heating
Exploitation is big in the urgent need to a kind of thermal discharge, low cost, the easy chemical heat-generating agent system of job safety.
The content of the invention
The technical problem to be solved is for above-mentioned the deficiencies in the prior art, there is provided a kind of thick for alkalescence
The spontaneous heat chemistry temperature raising medicament of oily reservoir.The spontaneous heat chemistry temperature raising medicament has heat efficiency high, transport reservoir and injection
The advantages of process safety is reliable, temperature sensitive triggering is rapid, carrying injection effect is good, is applicable to spontaneous inside alkaline thick oil reservoir
Hot temperature raising synergy exploitation.
For solving above-mentioned technical problem, the technical solution used in the present invention is：It is a kind of for the spontaneous of alkaline thick oil reservoir
Heat chemistry temperature raising medicament, it is characterised in that including heat generating agent and triggering agent, the heat generating agent includes that granularity is not more than 400 purposes
Aluminium powder and the clad for wrapping up aluminium powder, the triggering agent are the NaOH aqueous solution, in the quality of aluminium powder and the NaOH aqueous solution
The mass ratio of NaOH is 1:(1.0～2.5), the clad are paraffin clad or aluminum stearate clad.
The above-mentioned spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir, quality and the NaOH aqueous solution of the aluminium powder
The mass ratio of middle NaOH is 1:(1.6～2.0).
The above-mentioned spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir, quality and the NaOH aqueous solution of the aluminium powder
The mass ratio of middle NaOH is 1:1.8.
The above-mentioned spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir, the mass concentration of the NaOH aqueous solution is
25%～30%.
The above-mentioned spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir, when the clad is paraffin clad
When, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 65 DEG C～70 DEG C of stirring condition, paraffin is added in hexamethylene until be completely melt, stone is obtained
Wax mass concentration is 20%～40% cladding solution, then according to aluminium powder and the matter of paraffin under temperature-resistant stirring condition
Amount is than being (4～6):1 ratio adds aluminium powder in cladding solution, constant temperature dispersion 20min～40min；
Step 2, by step one constant temperature dispersion after material drop to room in the stirring condition of 100rpm～150rpm
Temperature, paraffin are condensed on aluminium powder surface, filter, obtain filter residue after stratification；
Step 3, by filter residue described in step 2 with hexamethylene flushing after be vacuum dried, then by the filter after vacuum drying
Slag grinds, and obtains solid granular heat generating agent.
The above-mentioned spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir, vacuum drying temperature described in step 3
For 18 DEG C～25 DEG C, the vacuum drying time is 8h～15h.
The above-mentioned spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir, when the clad is coated for aluminum stearate
During layer, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 50 DEG C～60 DEG C of water bath condition, by absolute ethyl alcohol constant temperature stir 30min～60min, Ran Houxiang
Stearic acid is added in absolute ethyl alcohol, is stirred to stearic acid and is completely dissolved, obtain the bag that stearic acid mass concentration is 0.5%～2%
Cover solution, then be (80～120) according to aluminium powder and stearic mass ratio under agitation:Aluminium powder is added and is wrapped by 1 ratio
Cover in solution, constant temperature dispersion 20min～40min, stearic acid generate aluminum stearate with the reaction of part aluminium powder；
Step 2, by step one constant temperature dispersion after material drop to room in the stirring condition of 100rpm～150rpm
Temperature, reacts the aluminum stearate for generating and condenses on remaining aluminium powder surface, filters, obtain filter residue after continuing stirring 30min～90min；
Step 3, filter residue described in step 2 is vacuum dried, then the filter residue after vacuum drying is ground,
Obtain solid granular heat generating agent.
The above-mentioned spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir, vacuum drying temperature described in step 3
For 18 DEG C～25 DEG C, the vacuum drying time is 8h～15h.
In addition, present invention also offers a kind of using method of above-mentioned spontaneous heat chemistry temperature raising medicament, it is characterised in that should
Method is comprised the following steps：
Step one, according to hydroxyethyl cellulose and sodium chloride mass ratio be 1:Mass concentration is by the ratio of (15～25)
1%～2% hydroxyethyl cellulose solution and mass concentration are to stir after 20%～30% sodium chloride solution mixes, and are obtained
To carrying liquid；
Step 2, will heat generating agent add step one described in carry liquid in, stirring until heat generating agent be suspended in carrying completely
In liquid；The addition of the heat generating agent is：Liquid is carried per 100mL adds 30g～50g heat generating agents；
Step 3, the heat generating agent that carrying liquid is carried in implantation step in pit shaft two, then inject 3m into pit shaft3～5m3
Injection triggering agent in water, most backward pit shaft.
The present invention has advantages below compared with prior art：
1st, the present invention combines the high heat density fuel technology of space flight navigational field, using heat generating agent and triggering agent and stratum
Amount of heat is released in the reaction of water, while preparing heat generating agent using cladding microcapsules technology, it is ensured that heat generating agent conveyed on ground,
Security in storing and being miscible.
2nd, there is spontaneous heat chemistry temperature raising medicament of the invention heat efficiency high, transport reservoir and injection process safely may be used
By, temperature sensitive triggering is rapid, to carry injection effect good the advantages of, the Self-heating temperature raising being applicable to inside alkaline environment thick oil reservoir
Synergy is developed.
3rd, when in use, heat generating agent is smoothly carried along into pit shaft by liquid is carried to spontaneous heat chemistry temperature raising medicament of the invention,
Under the hot conditions in pit shaft, the fusing of the clad on heat generating agent surface and is subsequently injected into the aluminium powder of cladding and stratum water
There is following reaction after triggering agent contact：
2Al+6H2O→3H2↑+2Al(OH)3↓,
Al(OH)3+NaOH→NaAlO2+2H2O,
Reaction is carried out simultaneously above, so its reaction equation can be write as：
2Al+2NaOH+2H2O→3H2↑+2NaAlO2,
The heat of 416.5KJ/mol Al is released in reaction, realizes spontaneous heat chemistry temperature raising.
4th, spontaneous heat chemistry temperature raising medicament of the invention is applied to permeability>500×10-3μm2, reservoir temperature>60 DEG C
Thick oil reservoir.
5th, spontaneous thermit powder exothermal efficiency of the invention is high, unit mass thermal discharge be current oil field maturation heat release system 5～
15 times.
Below by embodiment, technical solution of the present invention is described in further detail.
Specific embodiment
Embodiment 1
The spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir of the present embodiment, including heat generating agent and triggering agent, institute
Stating heat generating agent includes that granularity is not more than the aluminium powder and the clad for wrapping up aluminium powder of 400 mesh, and the triggering agent is mass concentration
For the 25% NaOH aqueous solution, the quality of aluminium powder is 1 with the mass ratio of NaOH in the NaOH aqueous solution:1.0, the clad is
Paraffin clad or aluminum stearate clad；
When clad is paraffin clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 65 DEG C of stirring condition, paraffin is added in hexamethylene until be completely melt, Quality of Paraffin Waxes is obtained
Concentration is 20% cladding solution, under temperature-resistant stirring condition is then 4 according to the mass ratio of aluminium powder and paraffin:1
Ratio adds aluminium powder in cladding solution, constant temperature dispersion 20min；
Step 2, by step one constant temperature dispersion after material drop to room temperature in the stirring condition of 100rpm, paraffin exists
Aluminium powder surface condenses, and filters, obtain filter residue after stratification；
Step 3, by filter residue described in step 2 with hexamethylene flushing after be vacuum dried, then by the filter after vacuum drying
Slag grinds, and obtains solid granular heat generating agent；The vacuum drying temperature is 18 DEG C, and the vacuum drying time is 15h.
When clad is aluminum stearate clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 50 DEG C of water bath condition, by absolute ethyl alcohol constant temperature stir 60min, then in absolute ethyl alcohol plus
Enter stearic acid, stir to stearic acid and be completely dissolved, obtain the cladding solution that stearic acid mass concentration is 0.5%, then in stirring bar
It is 80 according to aluminium powder and stearic mass ratio under part:1 ratio adds aluminium powder in cladding solution, constant temperature dispersion 20min, firmly
Resin acid generates aluminum stearate with the reaction of part aluminium powder；
Step 2, the stirring condition by the material after constant temperature dispersion in step one in 100rpm drop to room temperature, reaction life
Into aluminum stearate condense on remaining aluminium powder surface, continue stirring 30min after filter, obtain filter residue；
Step 3, filter residue described in step 2 is vacuum dried, then the filter residue after vacuum drying is ground,
Obtain solid granular heat generating agent；The vacuum drying temperature is 18 DEG C, and the vacuum drying time is 15h.
The using method of the spontaneous heat chemistry temperature raising medicament of the present embodiment is：
Step one, according to hydroxyethyl cellulose and sodium chloride mass ratio be 1:Mass concentration is 1% by 20 ratio
Hydroxyethyl cellulose solution and mass concentration are to stir after 20% sodium chloride solution mixes, and obtain carrying liquid；
Step 2, will heat generating agent add carry liquid in, stirring until heat generating agent be suspended in completely carrying liquid in；The heat
The addition of agent is：Liquid is carried per 100mL adds 30g heat generating agents；
Step 3, the heat generating agent that carrying liquid is carried in implantation step in pit shaft two, then inject 3m into pit shaft3Water,
Injection triggering agent in most backward pit shaft, in injection process, control injection pressure is less than the 90% of reservoir fracture pressure.
Embodiment 2
The spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir of the present embodiment, including heat generating agent and triggering agent, institute
Stating heat generating agent includes that granularity is not more than the aluminium powder and the clad for wrapping up aluminium powder of 400 mesh, and the triggering agent is mass concentration
For the 30% NaOH aqueous solution, the quality of aluminium powder is 1 with the mass ratio of NaOH in the NaOH aqueous solution:2.5, the clad is
Paraffin clad or aluminum stearate clad；
When clad is paraffin clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 70 DEG C of stirring condition, paraffin is added in hexamethylene until be completely melt, Quality of Paraffin Waxes is obtained
Concentration is 40% cladding solution, under temperature-resistant stirring condition is then 6 according to the mass ratio of aluminium powder and paraffin:1
Ratio adds aluminium powder in cladding solution, constant temperature dispersion 40min；
Step 2, by step one constant temperature dispersion after material drop to room temperature in the stirring condition of 150rpm, paraffin exists
Aluminium powder surface condenses, and filters, obtain filter residue after stratification；
Step 3, by filter residue described in step 2 with hexamethylene flushing after be vacuum dried, then by the filter after vacuum drying
Slag grinds, and obtains solid granular heat generating agent；The vacuum drying temperature is 25 DEG C, and the vacuum drying time is 8h.
When clad is aluminum stearate clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 60 DEG C of water bath condition, by absolute ethyl alcohol constant temperature stir 30min, then in absolute ethyl alcohol plus
Enter stearic acid, stir to stearic acid and be completely dissolved, obtain the cladding solution that stearic acid mass concentration is 2%, then in stirring condition
Under be 120 according to aluminium powder and stearic mass ratio:1 ratio adds aluminium powder in cladding solution, constant temperature dispersion 40min, firmly
Resin acid generates aluminum stearate with the reaction of part aluminium powder；
Step 2, the stirring condition by the material after constant temperature dispersion in step one in 150rpm drop to room temperature, reaction life
Into aluminum stearate condense on remaining aluminium powder surface, continue stirring 90min after filter, obtain filter residue；
Step 3, filter residue described in step 2 is vacuum dried, then the filter residue after vacuum drying is ground,
Obtain solid granular heat generating agent；The vacuum drying temperature is 25 DEG C, and the vacuum drying time is 8h.
The using method of the spontaneous heat chemistry temperature raising medicament of the present embodiment is：
Step one, according to hydroxyethyl cellulose and sodium chloride mass ratio be 1:Mass concentration is 2% by 15 ratio
Hydroxyethyl cellulose solution and mass concentration are to stir after 30% sodium chloride solution mixes, and obtain carrying liquid；
Step 2, will heat generating agent add carry liquid in, stirring until heat generating agent be suspended in completely carrying liquid in；The heat
The addition of agent is：Liquid is carried per 100mL adds 50g heat generating agents；
Step 3, the heat generating agent that carrying liquid is carried in implantation step in pit shaft two, then inject 5m into pit shaft3Water,
Injection triggering agent in most backward pit shaft, in injection process, control injection pressure is less than the 90% of reservoir fracture pressure.
Embodiment 3
The spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir of the present embodiment, including heat generating agent and triggering agent, institute
Stating heat generating agent includes that granularity is not more than the aluminium powder and the clad for wrapping up aluminium powder of 400 mesh, and the triggering agent is mass concentration
For the 27% NaOH aqueous solution, the quality of aluminium powder is 1 with the mass ratio of NaOH in the NaOH aqueous solution:1.6, the clad is
Paraffin clad or aluminum stearate clad；
When clad is paraffin clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 68 DEG C of stirring condition, paraffin is added in hexamethylene until be completely melt, Quality of Paraffin Waxes is obtained
Concentration is 25% cladding solution, under temperature-resistant stirring condition is then 5 according to the mass ratio of aluminium powder and paraffin:1
Ratio adds aluminium powder in cladding solution, constant temperature dispersion 30min；
Step 2, by step one constant temperature dispersion after material drop to room temperature in the stirring condition of 120rpm, paraffin exists
Aluminium powder surface condenses, and filters, obtain filter residue after stratification；
Step 3, by filter residue described in step 2 with hexamethylene flushing after be vacuum dried, then by the filter after vacuum drying
Slag grinds, and obtains solid granular heat generating agent；The vacuum drying temperature is 20 DEG C, and the vacuum drying time is 10h.
When clad is aluminum stearate clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 55 DEG C of water bath condition, by absolute ethyl alcohol constant temperature stir 40min, then in absolute ethyl alcohol plus
Enter stearic acid, stir to stearic acid and be completely dissolved, obtain the cladding solution that stearic acid mass concentration is 1%, then in stirring condition
Under be 100 according to aluminium powder and stearic mass ratio:1 ratio adds aluminium powder in cladding solution, constant temperature dispersion 30min, firmly
Resin acid generates aluminum stearate with the reaction of part aluminium powder；
Step 2, the stirring condition by the material after constant temperature dispersion in step one in 120rpm drop to room temperature, reaction life
Into aluminum stearate condense on remaining aluminium powder surface, continue stirring 60min after filter, obtain filter residue；
Step 3, filter residue described in step 2 is vacuum dried, then the filter residue after vacuum drying is ground,
Obtain solid granular heat generating agent；The vacuum drying temperature is 20 DEG C, and the vacuum drying time is 10h.
The using method of the spontaneous heat chemistry temperature raising medicament of the present embodiment is：
Step one, according to hydroxyethyl cellulose and sodium chloride mass ratio be 1:Mass concentration is 1.5% by 25 ratio
Hydroxyethyl cellulose solution and the mixing of sodium chloride solution that mass concentration is 25% after stir, obtain carrying liquid；
Step 2, will heat generating agent add carry liquid in, stirring until heat generating agent be suspended in completely carrying liquid in；The heat
The addition of agent is：Liquid is carried per 100mL adds 40g heat generating agents；
Step 3, the heat generating agent that carrying liquid is carried in implantation step in pit shaft two, then inject 4m into pit shaft3Water,
Injection triggering agent in most backward pit shaft, in injection process, control injection pressure is less than the 90% of reservoir fracture pressure.
Embodiment 4
The spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir of the present embodiment, including heat generating agent and triggering agent, institute
Stating heat generating agent includes that granularity is not more than the aluminium powder and the clad for wrapping up aluminium powder of 400 mesh, and the triggering agent is mass concentration
For the 27% NaOH aqueous solution, the quality of aluminium powder is 1 with the mass ratio of NaOH in the NaOH aqueous solution:2.0, the clad is
Paraffin clad or aluminum stearate clad；
When clad is paraffin clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 70 DEG C of stirring condition, paraffin is added in hexamethylene until be completely melt, Quality of Paraffin Waxes is obtained
Concentration is 35% cladding solution, under temperature-resistant stirring condition is then 4.5 according to the mass ratio of aluminium powder and paraffin:1
Ratio by aluminium powder add cladding solution in, constant temperature dispersion 30min；
Step 2, by step one constant temperature dispersion after material drop to room temperature in the stirring condition of 130rpm, paraffin exists
Aluminium powder surface condenses, and filters, obtain filter residue after stratification；
Step 3, by filter residue described in step 2 with hexamethylene flushing after be vacuum dried, then by the filter after vacuum drying
Slag grinds, and obtains solid granular heat generating agent；The vacuum drying temperature is 22 DEG C, and the vacuum drying time is 12h.
When clad is aluminum stearate clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 60 DEG C of water bath condition, by absolute ethyl alcohol constant temperature stir 60min, then in absolute ethyl alcohol plus
Enter stearic acid, stir to stearic acid and be completely dissolved, obtain the cladding solution that stearic acid mass concentration is 1.5%, then in stirring bar
It is 90 according to aluminium powder and stearic mass ratio under part:1 ratio adds aluminium powder in cladding solution, constant temperature dispersion 30min, firmly
Resin acid generates aluminum stearate with the reaction of part aluminium powder；
Step 2, the stirring condition by the material after constant temperature dispersion in step one in 130rpm drop to room temperature, reaction life
Into aluminum stearate condense on remaining aluminium powder surface, continue stirring 45min after filter, obtain filter residue；
Step 3, filter residue described in step 2 is vacuum dried, then the filter residue after vacuum drying is ground,
Obtain solid granular heat generating agent；The vacuum drying temperature is 22 DEG C, and the vacuum drying time is 12h.
The using method of the spontaneous heat chemistry temperature raising medicament of the present embodiment is：
Step one, according to hydroxyethyl cellulose and sodium chloride mass ratio be 1:Mass concentration is 1.8% by 20 ratio
Hydroxyethyl cellulose solution and the mixing of sodium chloride solution that mass concentration is 28% after stir, obtain carrying liquid；
Step 2, will heat generating agent add carry liquid in, stirring until heat generating agent be suspended in completely carrying liquid in；The heat
The addition of agent is：Liquid is carried per 100mL adds 35g heat generating agents；
Step 3, the heat generating agent that carrying liquid is carried in implantation step in pit shaft two, then inject 3.5m into pit shaft3
Injection triggering agent in water, most backward pit shaft, in injection process, control injection pressure is less than the 90% of reservoir fracture pressure.
Embodiment 5
The spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir of the present embodiment, including heat generating agent and triggering agent, institute
Stating heat generating agent includes that granularity is not more than the aluminium powder and the clad for wrapping up aluminium powder of 400 mesh, and the triggering agent is mass concentration
For the 30% NaOH aqueous solution, the quality of aluminium powder is 1 with the mass ratio of NaOH in the NaOH aqueous solution:1.8, the clad is
Paraffin clad or aluminum stearate clad；
When clad is paraffin clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 70 DEG C of stirring condition, paraffin is added in hexamethylene until be completely melt, Quality of Paraffin Waxes is obtained
Concentration is 30% cladding solution, under temperature-resistant stirring condition is then 5 according to the mass ratio of aluminium powder and paraffin:1
Ratio adds aluminium powder in cladding solution, constant temperature dispersion 30min；
Step 2, by step one constant temperature dispersion after material drop to room temperature in the stirring condition of 120rpm, paraffin exists
Aluminium powder surface condenses, and filters, obtain filter residue after stratification；
Step 3, by filter residue described in step 2 with hexamethylene flushing after be vacuum dried, then by the filter after vacuum drying
Slag grinds, and obtains solid granular heat generating agent；The vacuum drying temperature is 20 DEG C, and the vacuum drying time is 12h.
When clad is aluminum stearate clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 60 DEG C of water bath condition, by absolute ethyl alcohol constant temperature stir 50min, then in absolute ethyl alcohol plus
Enter stearic acid, stir to stearic acid and be completely dissolved, obtain the cladding solution that stearic acid mass concentration is 1%, then in stirring condition
Under be 100 according to aluminium powder and stearic mass ratio:1 ratio adds aluminium powder in cladding solution, constant temperature dispersion 30min, firmly
Resin acid generates aluminum stearate with the reaction of part aluminium powder；
Step 2, the stirring condition by the material after constant temperature dispersion in step one in 120rpm drop to room temperature, reaction life
Into aluminum stearate condense on remaining aluminium powder surface, continue stirring 60min after filter, obtain filter residue；
Step 3, filter residue described in step 2 is vacuum dried, then the filter residue after vacuum drying is ground,
Obtain solid granular heat generating agent；The vacuum drying temperature is 22 DEG C, and the vacuum drying time is 12h.
The using method of the spontaneous heat chemistry temperature raising medicament of the present embodiment is：
Step one, according to hydroxyethyl cellulose and sodium chloride mass ratio be 1:Mass concentration is 1.5% by 20 ratio
Hydroxyethyl cellulose solution and the mixing of sodium chloride solution that mass concentration is 25% after stir, obtain carrying liquid；
Step 2, will heat generating agent add carry liquid in, stirring until heat generating agent be suspended in completely carrying liquid in；The heat
The addition of agent is：Liquid is carried per 100mL adds 40g heat generating agents；
Step 3, the heat generating agent that carrying liquid is carried in implantation step in pit shaft two, then inject 4m into pit shaft3Water,
Injection triggering agent in most backward pit shaft, in injection process, control injection pressure is less than the 90% of reservoir fracture pressure.
Using the Self-heating temperature raising medicament of the embodiment of the present invention 1 to embodiment 5, mining site is carried out in one heavy oil wells of Shengli Oil Field
Test, 66 DEG C of the well reservoir temperature, well depth 1450m, in-place permeability 2332 × 10-3μm2, meet technology application reservoir condition
(permeability>500×10-3μm2, reservoir temperature>60 DEG C), before construction, the well is in noenergy end-of-life state.Heat generating agent consumption can
Determined with the relation of steam heat with producing heat by heat generating agent, it is assumed that 1.6 meters of thick oil pays of effect 5-15 rice scopes, crude oil
120 DEG C are lifted temperature to, stratum water lifts temperature to 100 DEG C, formation rock skeleton lifts temperature to 120 DEG C, and heat generating agent thermal discharge presses 416.5kJ/
Mol Al, budgetary estimate aluminium powder consumption are 2 tons, calculate heat generating agent consumption according to aluminium powder consumption, and then calculate triggering agent consumption.
Before and after the well construction, creation data is as shown in the table：
Condition of production table before and after the test well construction of table 1
Before the well construction, liquid level is located at below pumping hole, and in the state of taking out is stopped, after construction, individual well produces liquid up to 6.3t/d, and the initial stage produces
Go out liquid well head test temperature and reach 73.5 degrees Celsius, it is considered to which temperature in wellbore is lost, well fluids downhole temperature is more than 100 degrees Celsius, and
Reservoir the original reservoir temperature is only 66 DEG C, shows that the spontaneous heat chemistry temperature raising medicament of the present invention effectively raises reservoir fluid
Temperature, the Self-heating temperature raising synergy exploitation being capable of achieving inside thick oil reservoir.
The above, is only presently preferred embodiments of the present invention, not does any restriction to the present invention, every according to invention skill
Any simple modification, change and equivalent structure change that art is substantially made to above example, still fall within the technology of the present invention
In the protection domain of scheme.
Claims (6)
1. a kind of spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir, it is characterised in that including heat generating agent and triggering agent,
The heat generating agent includes that granularity is not more than the aluminium powder and the clad for wrapping up aluminium powder of 400 mesh, and the triggering agent is NaOH water
Solution, the quality of aluminium powder are 1 with the mass ratio of NaOH in the NaOH aqueous solution:(1.0～2.5), the clad are paraffin bag
Coating or aluminum stearate clad；The mass concentration of the NaOH aqueous solution is 25%～30%；
When the clad is paraffin clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 65 DEG C～70 DEG C of stirring condition, paraffin is added in hexamethylene until be completely melt, paraffin matter is obtained
Amount concentration is 20%～40% cladding solution, then according to aluminium powder and the mass ratio of paraffin under temperature-resistant stirring condition
For (4～6):1 ratio adds aluminium powder in cladding solution, constant temperature dispersion 20min～40min；
Step 2, by step one constant temperature dispersion after material drop to room temperature, stone in the stirring condition of 100rpm～150rpm
Wax is condensed on aluminium powder surface, filters, obtain filter residue after stratification；
Step 3, by filter residue described in step 2 with hexamethylene flushing after be vacuum dried, then the filter residue after vacuum drying is ground
Milling is broken, obtains solid granular heat generating agent；
When the clad is aluminum stearate clad, the preparation method of the heat generating agent is comprised the following steps：
Step one, under 50 DEG C～60 DEG C of water bath condition, absolute ethyl alcohol constant temperature is stirred into 30min～60min, then to anhydrous
Stearic acid is added in ethanol, is stirred to stearic acid and is completely dissolved, obtain the cladding that stearic acid mass concentration is 0.5%～2% molten
Liquid, then be (80～120) according to aluminium powder and stearic mass ratio under agitation:Aluminium powder is added cladding molten by 1 ratio
In liquid, constant temperature dispersion 20min～40min, stearic acid generate aluminum stearate with the reaction of part aluminium powder；
Step 2, by step one constant temperature dispersion after material drop to room temperature in the stirring condition of 100rpm～150rpm, instead
The aluminum stearate that should be generated is condensed on remaining aluminium powder surface, filters, obtain filter residue after continuing stirring 30min～90min；
Step 3, filter residue described in step 2 is vacuum dried, then the filter residue after vacuum drying is ground, is obtained
Solid granular heat generating agent.
2. the spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir according to claim 1, it is characterised in that described
The quality of aluminium powder is 1 with the mass ratio of NaOH in the NaOH aqueous solution:(1.6～2.0).
3. the spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir according to claim 2, it is characterised in that described
The quality of aluminium powder is 1 with the mass ratio of NaOH in the NaOH aqueous solution:1.8.
4. the spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir according to claim 1,2 or 3, its feature exist
In, when the clad is paraffin clad, three the step of the preparation method of the heat generating agent described in vacuum drying temperature
Spend for 18 DEG C～25 DEG C, the vacuum drying time is 8h～15h.
5. the spontaneous heat chemistry temperature raising medicament for alkaline thick oil reservoir according to claim 1,2 or 3, its feature exist
In, when the clad is aluminum stearate clad, three the step of the preparation method of the heat generating agent described in be vacuum dried
Temperature be 18 DEG C～25 DEG C, the vacuum drying time be 8h～15h.
6. a kind of using method of heat chemistry temperature raising medicament spontaneous as described in claim 1,2 or 3, it is characterised in that the method
Comprise the following steps：
Step one, according to hydroxyethyl cellulose and sodium chloride mass ratio be 1:Mass concentration is 1% by the ratio of (15～25)
～2% hydroxyethyl cellulose solution and mass concentration are to stir after 20%～30% sodium chloride solution mixes, and are obtained
Carry liquid；
Step 2, will heat generating agent add step one described in carry liquid in, stirring until heat generating agent be suspended in completely carrying liquid in；
The addition of the heat generating agent is：Liquid is carried per 100mL adds 30g～50g heat generating agents；
Step 3, the heat generating agent that carrying liquid is carried in implantation step in pit shaft two, then inject 3m into pit shaft3～5m3Water,
Injection triggering agent in most backward pit shaft.
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| CN105089592B (en) * | 2015-07-17 | 2017-07-28 | 中国石油大学(华东) | Chemical Self-heating system injection technology and injection device in thick oil reservoir |
| CN108176851A (en) * | 2018-01-02 | 2018-06-19 | 中国工程物理研究院化工材料研究所 | A kind of metallic aluminium powder coats means of defence |
| CN110003873A (en) * | 2019-04-16 | 2019-07-12 | 济南大学 | A kind of preparation method of neutral homogeneous spontaneous heating economic benefits and social benefits de-plugging scale remover |
| CN110003874A (en) * | 2019-04-16 | 2019-07-12 | 济南大学 | A kind of preparation method of temperature control type economic benefits and social benefits de-plugging scale remover |
| CN111876143B (en) * | 2020-07-20 | 2021-08-20 | 中国石油大学(北京) | Proppant and application thereof |
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| CN101580704A (en) * | 2009-05-15 | 2009-11-18 | 杨强 | Washing agent and washing method for paraffin removal and unplugging of oil wells and oil pumping pipelines of oil fields |
| CN101649191A (en) * | 2009-07-30 | 2010-02-17 | 戚伟 | Heating agent for stewing food |
| US9441471B2 (en) * | 2012-02-28 | 2016-09-13 | Baker Hughes Incorporated | In situ heat generation |
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