CN106085391A - The inorganic envelope of ultralow temperature thickened oil recovery alters agent and preparation method thereof - Google Patents
The inorganic envelope of ultralow temperature thickened oil recovery alters agent and preparation method thereof Download PDFInfo
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- CN106085391A CN106085391A CN201610397000.9A CN201610397000A CN106085391A CN 106085391 A CN106085391 A CN 106085391A CN 201610397000 A CN201610397000 A CN 201610397000A CN 106085391 A CN106085391 A CN 106085391A
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Abstract
The invention discloses a kind of inorganic envelope of ultralow temperature thickened oil recovery and alter agent and preparation method thereof, belong to oil gas field profile control agent technical field；The described inorganic envelope of ultralow temperature thickened oil recovery is altered agent raw material and is comprised following components by weight: water 300～500 parts, ammonium carbonate 40～60 parts, carbamide 40～60 parts, sodium silicate 400～600 parts, initiator A 0.5～3 parts, initiator B 0.5～3 parts；It is about 4 hours that the inorganic envelope of ultralow temperature thickened oil recovery of present invention synthesis alters agent gelling time at normal temperatures, viscosity is 5mPas, and this envelope of different ratio controllable according to raw material alters the gelling time of agent, when temperature is 0 DEG C, solid content about 95%, gelling time is about 1 hour, gel strength is 70mm, it is that a kind of dosage is few that this inorganic envelope alters agent, instant effect, and the relatively low excellent envelope of price alters agent.The described inorganic envelope of ultralow temperature thickened oil recovery is altered agent and is had low-temperature resistance performance, the seal-off effect of high intensity, and compatibility is excellent, reacting balance, and production efficiency is high, and properties of product are highly stable.
Description
Technical field
The invention discloses a kind of inorganic envelope of ultralow temperature thickened oil recovery and alter agent and preparation method thereof, especially a kind of for low
Under temperature environmental condition, the envelope of profile control alters agent and preparation method thereof, belongs to oil gas field profile control agent technical field.
Background technology
Along with middle and late stage is stepped in conventional gas and oil development of resources, it is non-that the increasing sight of people invests viscous crude, super-viscous oil etc.
Conventional oil reservoir.In world wide, viscous crude resource is the abundantest, and widely distributed, and almost all there is heavy crude reservoir in each oil-producing country.According to
Statistics, the recoverable reserves of whole world viscous crude, super-viscous oil and Colophonium is about 1000 × 10 at present8T, greatly exceed conventional crude,
Development potentiality is huge.Viscous crude occupies the biggest proportion in the resource of oil field, the world, the most effectively heavy crude producing so that it is become movable
Reserves, be petroleum industry problems faced always.Shadow due to the factor such as reservoir heterogeneity, disadvantageous oil-gas mobility ratio
Ring, cause vapour to be altered, fingering phenomenon serious, reduce sweep efficiency, have impact on the exploitation effect of viscous crude；Asphalt colloid content is high,
Wax content is few, thus viscosity is the highest, flow difficulties, and exploitation difficulty is the biggest.
The oil reservoir of China is typically distributed across in the unconsolidated sandstone formation of fluvial facies or fluvial-delta phase sedimentary composition, reservoir
Loose cementation, porosity is big, and permeability is high, and non-homogeneous degree is serious.Thermal recovery technology is as the Main Means of heavy oil development,
It is widely used in the exploitation of domestic and international heavy crude reservoir.Thickened oil recovery is worldwide largest raising oil recovery projects item
Mesh, this technology from come out since, had the development advanced by leaps and bounds, define drive with steam soak, steam, SAGD, hot water
Drive, the technology such as combustion in situ, Electromagnetic Heating is the technological frame of representative, and wherein most technology has been applied to heavy crude reservoir
Exploitation, and achieve significant effect.Having reason to speculate, along with successively decreasing of conventional crude yield, following meeting with thickened oil recovery be
Emphasis, makes up the deficiency of petroleum-based energy.Therefore the profile control and water plugging research carrying out thickened oil recovery well seems and becomes more and more important.Viscous crude at present
The blocking agent of exploitation substantially can be divided into by mechanism: ultralow temperature polymer gel class, solid phase particles class, foam class, emulsifying viscous crude and salt
Precipitating etc..The reservoir physical parameter hidden again according to China's viscous crude and exploitation via steam injection technique, can be due to the profile control of thickened oil recovery well
System should possess following characteristics: 1, relatively low-viscosity, can injection good；2, suitable gelation time is adjustable, typically in 8-50h
It is advisable；3, good heat resistance, temperature tolerance is at-60 DEG C-30 DEG C；4, good compatibility and salt resistant character；5, good
Shut-off capacity and long-time stability, easy de-plugging, little to formation contaminant；6, raw material sources are wide, cheap, economically feasible.Steam
Huff and puff oil recovery technology refers to first inject a certain amount of steam, closing well a period of time to oil well, treats that the heat energy of steam spreads to oil reservoir
After, then the method for increasing of a kind of heavy crude producing of opening well and making production.The main method of its current thickened oil recovery of Ye Shi China, the whole nation is about
The heavy oil production having 80% obtains by cyclic steam stimulation process.
Summary can learn that the inorganic envelope of this ultralow temperature is altered agent and should be possessed following performance: without particle, viscous under room temperature
Spend low, there is extraordinary injection；There is stronger Selective implantation ability, under certain flow velocity, preferentially enter oil-containing satisfy
Predominant pathway low with degree, that pore throat is bigger, the not stifled oil of water blockoff；Viscosity is low, not by the shear action of pump, borehole and porous media,
Its overall consolidation strength is suitable with consolidation strength in porous media；Hardening time is controlled, in the range of caning be controlled in 0.5h～15h.
Solidification intensity is high, and the residual resistance factor of steam be may be up to 30, meets heavy crude reservoir envelope and alters the requirement with water blockoff；Temperature resistant capability
By force, being resistant to-60 DEG C of low temperature, and heatproof effect duration is long, after-20 DEG C of 30d, residual resistance factor is still greater than 20；Degradable technology, both
High intensity closure can be produced, also can be degraded by supporting technology, reduce construction risk；Preparation is simple, and site operation is easily grasped
Make.
Summary of the invention
The goal of the invention of the present invention is: for the problem causing vapour to alter during thickened oil recovery, it is provided that a kind of reaction is flat
Surely, gelling time is controlled, seal-off effect is good, production cost is low, the ultralow temperature of reliable product quality envelope alters agent, with effective closure
Slit, strengthens the efficiency of thickened oil recovery, improves the rate of oil and gas recovery
The technical solution used in the present invention is as follows:
A kind of inorganic envelope of ultralow temperature thickened oil recovery alters agent, and it it is critical only that: raw material comprises following components by weight:
Water 300～500 parts, potential sour 40～60 parts, carbamide 40～60 parts, sodium silicate 400～600 parts, initiator A 0.5～3 parts, draw
Send out agent B 0.5～3 parts；And prepare by the following method:
(1) dosing: a certain amount of water is added in dosing still, under agitation adds a certain amount of potential acid, add the most again
Entering carbamide, add a certain amount of sodium silicate after it is completely dissolved, the temperature of whole process is not more than 30 DEG C；
(2) reaction: step 1 gained configuration liquid is proceeded to reactor, is under agitation sequentially added into initiator A in preparation liquid
Aqueous solution and initiator B aqueous solution, standing and reacting after reactor is warming up to 20 DEG C, i.e. can get described super after standing 2 hours
The inorganic envelope of low temperature thickened oil recovery alters agent；
Wherein: described potential acid be ammonium carbonate, ammonium sulfate, citric acid one or more, described initiator A is tri-chlorination
Ferrum, described initiator B is seeding agent.
Potential acid and carbamide can reach to control the effect of polymerization rate, further, institute by different concentration
The mass concentration stating initiator A aqueous solution is 1～2%, and the mass concentration of described initiator B aqueous solution is 0.5～1%.
Further, the mass concentration of described initiator A aqueous solution is 2～3%, the quality of described initiator B aqueous solution
Concentration is 1.5～2%.
Further, the mass concentration of described initiator A aqueous solution is 3～4%, the quality of described initiator B aqueous solution
Concentration is 2～3%.
The present invention also provides for a kind of inorganic envelope of ultralow temperature thickened oil recovery and alters the preparation method of agent, is prepared by following steps:
Water 300～500 parts, potential sour 40～60 parts, carbamide 40～60 parts, sodium silicate 400～600 parts, initiator A 0.5
～3 parts, initiator B 0.5～3 parts；And prepare by the following method:
(1) dosing: a certain amount of water is added in dosing still, under agitation adds a certain amount of potential acid, add the most again
Entering carbamide, add a certain amount of sodium silicate after it is completely dissolved, the temperature of whole process is not more than 30 DEG C；
(2) reaction: step 1 gained configuration liquid is proceeded to reactor, is under agitation sequentially added into initiator A in preparation liquid
Aqueous solution and initiator B aqueous solution, standing and reacting after reactor is warming up to 20 DEG C, after standing 2 hours after i.e. available described
The inorganic envelope of ultralow temperature thickened oil recovery alters agent；
Wherein: described potential acid be phenol, formaldehyde, methyl formate, ethyl acetate or amide one or more, described initiation
Agent A is ferric chloride, and described initiator B is seeding agent.
In preparation process, the mass concentration of described initiator A aqueous solution is 2～3%, the matter of described initiator B aqueous solution
Amount concentration is 1.5～2%.
Further, the mass concentration of described agent A aqueous solution is 3～4%, and the quality of described initiator B aqueous solution is dense
Degree is 2～3%.
The inorganic envelope of ultralow temperature thickened oil recovery using the method synthesis alters the silicon that its action principle of agent is certain mass mark
Being initially formed single silicic acid after adding activator in acid sodium solution, then be condensed into multi-silicate, multi-silicate forms space net structure and presents
Gel.Can effectively block oil-gas Layer slit, ultralow temperature sealing agent can effectively block mechanism controlled with gelling time and be:
1. passing through phase transformation under reservoir temperature under the effect of inducing agent, the effect at chemical bond forms nucleus, and nucleus is gradually
Growing up, single nucleus is mutually coalesced by the bonding force of intermolecular active force and accelerator, ultimately forms and has high intensity
Overall structure.Plugging strength can be controlled by the change of concentration, meet the demand of thermal production well.
2. by controlling the concentration of initiator, gel time is rationally adjusted by the concentration of waterglass and modulus and pH value
Control, is reached a conclusion by Arrhenius theorem, and when above-mentioned condition changes, the response time of gel can change.So
Can meet under the conditions of Different Strata, the envelope adding suitable type alters agent to reach the purpose of profile control, thus increases the product of oil gas
Amount.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows: described ultralow temperature thickened oil recovery
Inorganic envelope alters agent, and product dosage is few, instant effect, and compatibility is good, significant to oil gas field volume increase, the seal-off effect to oil reservoir
Can be good, the described inorganic envelope of ultralow temperature thickened oil recovery is altered agent and produced synthesis temperature is controlled, can add according to different formation temperatures
Suitably envelope alters agent, and production efficiency is high, and properties of product are highly stable.
Detailed description of the invention
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive
Feature and/or step beyond, all can combine by any way.
Any feature disclosed in this specification, unless specifically stated otherwise, all can by other equivalence or there is similar purpose
Alternative features is replaced.I.e., unless specifically stated otherwise, an example during each feature is a series of equivalence or similar characteristics
?.
The inorganic envelope of ultralow temperature thickened oil recovery of the present invention alters agent, and each raw material is commercially available.
Embodiment 1
The present embodiment one inorganic envelope of ultralow temperature thickened oil recovery alters agent, is prepared by following steps:
(1) dosing: added by 400 parts of water in dosing still, under agitation adds 10 parts of ammonium carbonate, under agitation adds 90
Part carbamide, after it is completely dissolved, adds 500 parts of sodium silicate after it is completely dissolved, and the temperature of whole process is not more than 30 DEG C；
(2) reaction: step 1 gained configuration liquid is proceeded to reactor, is under agitation sequentially added into initiator A in preparation liquid
Aqueous solution and initiator B aqueous solution, standing and reacting after reactor is warming up to 20 DEG C, after standing 3 hours after i.e. available described
The inorganic envelope of ultralow temperature thickened oil recovery alters agent；
The inorganic envelope of ultralow temperature thickened oil recovery synthesized by the method alters the transparent gel of agent outward appearance, and gel strength is at 70mm
Left and right, it is possible to reach to block requirement.
Embodiment 2
The present embodiment one inorganic envelope of ultralow temperature thickened oil recovery alters agent, is prepared by following steps:
(1) dosing: added by 400 parts of water in dosing still, under agitation adds 20 parts of ammonium carbonate, under agitation adds 80
Part carbamide, after it is completely dissolved, adds 500 parts of sodium silicate after it is completely dissolved, and the temperature of whole process is not more than 30 DEG C；
(2) reaction: step 1 gained configuration liquid is proceeded to reactor, is under agitation sequentially added into initiator A in preparation liquid
Aqueous solution and initiator B aqueous solution, standing and reacting after reactor is warming up to 10 DEG C, after standing 2 hours after i.e. available described
The inorganic envelope of ultralow temperature thickened oil recovery alters agent；
The inorganic envelope of ultralow temperature thickened oil recovery synthesized by the method alters the transparent gel of agent outward appearance, and gel strength is at 70mm
Left and right, it is possible to reach to block requirement.
Embodiment 3
The present embodiment one inorganic envelope of ultralow temperature thickened oil recovery alters agent, is prepared by following steps:
(1) dosing: added by 400 parts of water in dosing still, under agitation adds 30 parts of ammonium carbonate, under agitation adds 70
Part carbamide, after it is completely dissolved, adds 500 parts of sodium silicate after it is completely dissolved, and the temperature of whole process is not more than 30 DEG C；
(2) reaction: step 1 gained configuration liquid is proceeded to reactor, is under agitation sequentially added into initiator A in preparation liquid
Aqueous solution and initiator B aqueous solution, standing and reacting after reactor is warming up to 20 DEG C, after standing 1 hour after i.e. available described
The inorganic envelope of ultralow temperature thickened oil recovery alters agent；
The inorganic envelope of ultralow temperature thickened oil recovery synthesized by the method alters the transparent gel of agent outward appearance, and gel strength is at 70mm
Left and right, it is possible to reach to block requirement.
It is about 4 hours that the inorganic envelope of ultralow temperature thickened oil recovery of present invention synthesis alters agent gelling time at normal temperatures, glutinous
Degree is 5mPas, and alters the gelling time of agent, when temperature is 0 DEG C, solid content according to this envelope of different ratio controllable of raw material
About 95%, gelling time is about 1 hour, and gel strength is 70mm, and it is that a kind of dosage is few that this inorganic envelope alters agent, instant effect,
The relatively low excellent envelope of price alters agent.And compatibility is good, significant to oil gas field volume increase, good to the sealing characteristics of oil reservoir, institute
It is controlled for stating the inorganic envelope of ultralow temperature thickened oil recovery and alter agent producing synthesis temperature, can add suitably envelope according to different formation temperatures
Altering agent, production efficiency is high, and properties of product are highly stable.
Last it should be noted that the invention is not limited in aforesaid detailed description of the invention.The present invention expands to any
The new feature disclosed in this manual or any new combination, and disclose arbitrary new method the step of process or appoint
The combination of He Xin.
Claims (7)
1. the inorganic envelope of ultralow temperature thickened oil recovery alters agent, it is characterised in that: raw material comprises following components by weight: water
300～500 parts, potential sour 40～60 parts, carbamide 40～60 parts, sodium silicate 400～600 parts, initiator A 0.5～3 parts, initiation
Agent B 0.5～3 parts；And prepare by the following method:
(1) dosing: a certain amount of water is added in dosing still, under agitation adds a certain amount of potential acid, under agitation add urine
Element, adds a certain amount of sodium silicate after it is completely dissolved, and the temperature of whole process is not more than 30 DEG C；
(2) reaction: step 1 gained configuration liquid is proceeded to reactor, is under agitation sequentially added into initiator A in preparation liquid water-soluble
Liquid and initiator B aqueous solution, standing and reacting after reactor is warming up to 20 DEG C, i.e. can get described ultralow temperature after standing 2 hours
The inorganic envelope of thickened oil recovery alters agent；
Wherein: described potential acid be ammonium carbonate, ammonium sulfate, citric acid one or more, described initiator A is ferric chloride, institute
Stating initiator B is seeding agent.
2. the inorganic envelope of ultralow temperature thickened oil recovery as claimed in claim 1 alters agent, it is characterised in that: described initiator A aqueous solution
Mass concentration be 1～2%, the mass concentration of described initiator B aqueous solution is 0.5～1%.
3. the inorganic envelope of ultralow temperature thickened oil recovery as claimed in claim 1 alters agent, it is characterised in that: described initiator A aqueous solution
Mass concentration be 2～3%, the mass concentration of described initiator B aqueous solution is 1.5～2%.
4. the inorganic envelope of ultralow temperature thickened oil recovery as claimed in claim 1 alters agent, it is characterised in that: described initiator A aqueous solution
Mass concentration be 3～4%, the mass concentration of described initiator B aqueous solution is 2～3%.
5. the inorganic envelope of ultralow temperature thickened oil recovery alters the preparation method of agent, it is characterised in that: prepared by following steps:
Water 300～500 parts, potential sour 40～60 parts, carbamide 40～60 parts, sodium silicate 400～600 parts, initiator A 0.5～3
Part, initiator B 0.5～3 parts；And prepare by the following method:
(1) dosing: a certain amount of water is added in dosing still, under agitation adds a certain amount of potential acid, under agitation add urine
Element, adds a certain amount of sodium silicate after it is completely dissolved, and the temperature of whole process is not more than 30 DEG C；
(2) reaction: step 1 gained configuration liquid is proceeded to reactor, is under agitation sequentially added into initiator A in preparation liquid water-soluble
Liquid and initiator B aqueous solution, standing and reacting after reactor is warming up to 20 DEG C, after standing 2 hours after i.e. can get described ultralow
The temperature inorganic envelope of thickened oil recovery alters agent；
Wherein: described potential acid be phenol, formaldehyde, methyl formate, ethyl acetate or amide one or more, described initiator A
For ferric chloride, described initiator B is seeding agent.
6. the inorganic envelope of ultralow temperature thickened oil recovery as claimed in claim 5 alters the preparation method of agent, it is characterised in that: described initiation
The mass concentration of agent A aqueous solution is 2～3%, and the mass concentration of described initiator B aqueous solution is 1.5～2%.
7. the inorganic envelope of ultralow temperature thickened oil recovery as claimed in claim 5 alters the preparation method of agent, it is characterised in that: described agent
The mass concentration of A aqueous solution is 3～4%, and the mass concentration of described initiator B aqueous solution is 2～3%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107573918A (en) * | 2017-08-11 | 2018-01-12 | 中国石油天然气股份有限公司 | A kind of full liquid phase air-flow diversion agent of oil deposit deep part and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1563259A (en) * | 2004-03-30 | 2005-01-12 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Block up and concoction agnet of inorganic delayed siliceous gel |
| CN101747883A (en) * | 2009-01-18 | 2010-06-23 | 濮阳联力化工总厂 | Inorganic gel profile control agent |
-
2016
- 2016-06-06 CN CN201610397000.9A patent/CN106085391B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1563259A (en) * | 2004-03-30 | 2005-01-12 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Block up and concoction agnet of inorganic delayed siliceous gel |
| CN101747883A (en) * | 2009-01-18 | 2010-06-23 | 濮阳联力化工总厂 | Inorganic gel profile control agent |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107573918A (en) * | 2017-08-11 | 2018-01-12 | 中国石油天然气股份有限公司 | A kind of full liquid phase air-flow diversion agent of oil deposit deep part and preparation method thereof |
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