CN1546600A - Preparation method of CO2-N2 composite foam synergist for improving thick oil heat gathering effect - Google Patents
Preparation method of CO2-N2 composite foam synergist for improving thick oil heat gathering effect Download PDFInfo
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- CN1546600A CN1546600A CNA2003101169061A CN200310116906A CN1546600A CN 1546600 A CN1546600 A CN 1546600A CN A2003101169061 A CNA2003101169061 A CN A2003101169061A CN 200310116906 A CN200310116906 A CN 200310116906A CN 1546600 A CN1546600 A CN 1546600A
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Abstract
The invention discloses a preparation method of CO2-N2 composite foam synergist for improving thick oil heat gathering effect which comprises, using fine thermal stability alpha-olefin mahogany sulfonate, heavy alkylbenzene sulfonate type, petroleum sulfonates type, hydrocarbyl sulfonated non-ionic type, and hydrocarbon alkyl phenolic resins surface active agent, forming (nitrogen-carbon dioxide) - surface active agent - alkali compound system with organic or inorganic compound capable of producing ammonia and CO2 and compounds able to produce nitrogen through reaction with ammonia.
Description
Technical field
The present invention relates to improve the method for heavy crude heat extraction effect, specially refer to a kind of CO of using
2-N
2The foam composite synergist improves the method for heavy crude heat extraction effect, is fit to heavy crude reservoir and adopts steam flood, steam stimulation performance history to use, and belongs to the oil development field.
Background technology
Viscous crude also weigh matter crude oil or highly viscous crude (English name is Heavy oil) are often referred to d
4 20＞0.92 crude oil.Especially straight chain waxy hydrocarbon lighting end content is few in the viscous crude, and colloid, asphalt content height, and element compounds such as sulphur, oxygen, nitrogen and metal contents such as nickel, vanadium are also higher, thus viscous crude than great, viscosity is high, condensation point is lower, generally is the Newtonian fuid characteristic in wide temperature range.It is viscosity height at normal temperatures not only, even under higher temperature, still has very high viscosity, give viscous crude exploitation, carry a series of problems of bringing.
For the exploitation of viscous crude, be that the thermodynamics method of representative is occupied an leading position at present with steam stimulation and steam flood, be the method that domestic and international viscous oil recovery of present stage is generally used.According to domestic recent two decades thermal recovery practice, the some problem demanding prompt solutions that expose, as; The back production of water of condensation in the variation of sweep efficiency raising, oil reservoir and the reservoir physical property of steam, the process of handling up in the steam flood process, and lifting, the collection of viscous crude is defeated etc. under the low temperature, the ordinary production of puzzlement viscous crude.
In recent years since, in order to overcome viscous crude by exposed problems in the heat extraction by steam injection process, successively adopted stack gas-compound steam to drive, add the preposition slug of tensio-active agent before the steam treatment, nitrogen-tensio-active agent foam flooding utilizes thermolysis generation carbonic acid gas, ammonia under the urea high temperature, steam-foam-weak base combination flooding that the matching surface promoting agent forms etc., strengthen viscous crude heat extraction by steam injection effect in a way, improved the viscous crude recovery percent of reserves.But, there is some deficiency in the above technology, the balance of carbonic acid gas, ammonia and water in the higher and urea-tensio-active agent foam flooding of nitrogen gas generator investment in stack gas, the nitrogen-tensio-active agent foam flooding implementation process relatively poor in driving as: stack gas-compound steam to foaming power in the burn into steam-surfactant flooding process of tubing string, when temperature reduced, carbonic acid gas, ammonia react generation volatile salt etc. limited its application.
Summary of the invention
The technical problem to be solved in the present invention is that a kind of being applicable to improved heavy crude heat extraction effect CO
2-N
2The preparation method of foam composite synergist.Tensio-active agent of the present invention is the sulfonated, heavy alkylbenzene sulfonate type, sulfonated petro-leum type, the non-ionic type of sulphur hydrocarbylation, the alkyl phenolic resin class tensio-active agent of hydrocarbylation of better heat stability; The thermolysis at high temperature of the urea that is adopted, volatile salt and bicarbonate of ammonia generates carbonic acid gas, ammonia, wherein ammonia can be converted into nitrogen with nitrite reaction of the present invention, regulate the mol ratio of ammonia and nitrite, the ratio of carbonic acid gas and nitrogen in can regulation system is dissolved in the caused viscosity reduction effect of viscous crude and nitrogen and the compound shutoff effect that produces of surfactivity foaming agent thereby coordinate carbonic acid gas; The yellow soda ash that reaction simultaneously generates can react a certain amount of interfacial activity composition with the acidic substance in the viscous crude as weak base, strengthens the thermal recovery effect of injecting steam.(nitrogen+carbonic acid gas) involved in the present invention-tensio-active agent-alkali compound system is particularly suitable for heavy crude reservoir and adopts steam flood, steam stimulation performance history to use.
A kind of being applicable to improved heavy crude heat extraction effect CO
2-N
2The preparation method of foam composite synergist comprises:
The non-ionic type of step 1, heat-obtaining stability sulfonated, heavy alkylbenzene sulfonate type, sulfonated petro-leum type, sulphur hydrocarbylation preferably, alkyl phenolic resin class tensio-active agent and low mass molecule alcohol, the water of hydrocarbylation are mixed with certain mass fractional surfactant soln, and A is stand-by as component.
Step 2, get the inorganic or organic compound, the nitrite that contain or under application conditions, can produce carbonic acid gas, ammonia and be dissolved in water and make the certain mass fractional aqueous solution, stand-by as B component.
The surfactant soln of step 3, described better heat stability (component A), add the effective constituent of tensio-active agent massfraction be 0.05～1.5% of injecting steam quality; Describedly contain or under application conditions, can produce the inorganic or organic compound of carbonic acid gas, ammonia and the aqueous solution (B component) of nitrite, add effective constituent massfraction be 0.1～5.0% of injecting steam quality;
The aforesaid preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist that is applicable to, described tensio-active agent is the non-ionic type of sulfonated, heavy alkylbenzene sulfonate type, sulfonated petro-leum type, sulphur hydrocarbylation, the alkyl phenolic resin of hydrocarbylation etc., recommends to use sulfonated, heavy alkylbenzene sulfonate type;
The aforesaid preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist that is applicable to, the described inorganic or organic compound that contains or can produce carbonic acid gas, ammonia under application conditions can be urea, volatile salt and bicarbonate of ammonia, recommends to use urea;
The aforesaid preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist that is applicable to, described nitrite can be Sodium Nitrite, potassium nitrite and ammonium nitrite, recommends to use Sodium Nitrite;
The aforesaid preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist that is applicable to, the thermolysis at high temperature of described urea, volatile salt and bicarbonate of ammonia generates carbonic acid gas, ammonia, wherein ammonia can be converted into nitrogen with nitrite reaction of the present invention, regulate the mol ratio of ammonia and nitrite, can regulation system in the ratio of carbonic acid gas and nitrogen;
The aforesaid preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist that is applicable to, the thermolysis at high temperature of described urea, volatile salt and bicarbonate of ammonia generates carbonic acid gas, ammonia, wherein carbonic acid gas can react the yellow soda ash that generates with Sodium Nitrite, it can react a certain amount of interfacial activity composition with the acidic substance in the viscous crude, strengthens the thermal recovery effect of injecting steam;
The present invention has remarkable advantages and beneficial effect than prior art.
The present invention uses for reference the reasonable part of existing intensifying technology, chemical reaction according to the basis, the interfacial chemistry ultimate principle, utilize inorganic or organic compound adopts steam flood at heavy crude reservoir, produce carbonic acid gas under the steam stimulation performance history condition, reacting with nitrite (as Sodium Nitrite) of ammonia generates nitrogen, carbonic acid gas and alkali, in the presence of the tensio-active agent of better heat stability, form (nitrogen+carbonic acid gas)-tensio-active agent-alkali foam compound system, effectively reduce viscosity of thickened oil, overcome steam flood, in the steam stimulation performance history because steam gravity come-up, fingering of steam water power and steam are strengthened the scope that involves of injecting steam in the problem that flows and cause fast of most permeable zone.The interfacial activity composition that acidic substance in tensio-active agent of Jia Ruing and yellow soda ash and viscous crude reaction is simultaneously produced helps to reduce viscous crude/water termination tension force, strengthens the chemical viscosity reduction effect of viscous crude.
Embodiment
The present invention is applicable to the preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist, be fit to heavy crude reservoir and adopt steam flood, (nitrogen+carbonic acid gas)-tensio-active agent-alkali compound system that the steam stimulation performance history is used is made up of three parts, the tensio-active agent that comprises better heat stability, contain or under application conditions, can produce carbonic acid gas, inorganic or the organic compound of ammonia, nitrite, inorganic or the organic compound that is wherein adopted can adopt steam flood at heavy crude reservoir, produce carbonic acid gas under the steam stimulation performance history condition, ammonia, and generate nitrogen with nitrite (as Sodium Nitrite) reaction, carbonic acid gas and alkali.
A kind of suitable preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist is characterized in that:
The non-ionic type of step 1, heat-obtaining stability sulfonated, heavy alkylbenzene sulfonate type, sulfonated petro-leum type, sulphur hydrocarbylation preferably, the alkyl phenolic resin class tensio-active agent of hydrocarbylation;
Step 2, get and contain or under application conditions, can generate ammonia and CO
2Organic or inorganic compound, nitrite be dissolved in water and make the certain mass fractional aqueous solution, and the compound that can produce nitrogen with ammonia react;
Step 3, can combine by required proportioning with the compound that ammonia react is produced nitrogen described tensio-active agent of step 1 and step 2 are described, constitute the compound system of (nitrogen-carbonic acid gas)-tensio-active agent-alkali.
Wherein the described tensio-active agent of step 1 adopts sulfonated, heavy alkylbenzene sulfonate, sulfonated petro-leum, the non-ionic type of sulphur hydrocarbylation, the alkyl phenolic resin of hydrocarbylation, and its massfraction that uses is for being 0.05～1.5% of injecting steam quality.
Wherein step 2 is described can generate ammonia and CO
2The organic or inorganic compound be urea, carbonic acid ammonia and ammonium hydrogencarbonate, its massfraction that uses is for being 0.1～5.0% of injecting steam quality.The compound that can produce nitrogen with ammonia react is a nitrite, recommends to use Sodium Nitrite, and its massfraction that uses is for being 0.05～3.5% of injecting steam quality.
Wherein can produce alkaline matter after the described compound system reaction of step 3, compound system can be regulated CO according to oil reservoir feature, recovery percent of reserves
2-N
2Ratio.
During the actual use of (nitrogen+carbonic acid gas)-tensio-active agent-alkali compound system that preparation method's of the present invention suitable heavy crude reservoir adopts steam flood, steam stimulation performance history to use, can adopt preposition slug mode before steam slug, to inject, also can adopt proportioning pump to follow steam to inject together.
The tensio-active agent of better heat stability of the present invention is as whipping agent, viscosity-depression agent in (nitrogen+carbonic acid gas)-tensio-active agent-alkali compound system that is fit to heavy crude reservoir employing steam flood, the application of steam stimulation performance history, effective in 0.05～1.5% scope that common massfraction is the injecting steam quality, effect is better when its massfraction is 0.1～0.5% scope of injecting steam quality, and when its massfraction be the injecting steam quality 0.2～0.3% the time best results.Simultaneously, for the higher viscous crude of acid number, consider that the interfacial activity material that reaction generates in the system can be used as the tensio-active agent use, can suitably reduce the functional quality mark of tensio-active agent.
It is urea, volatile salt and bicarbonate of ammonia that preparation method's of the present invention suitable heavy crude reservoir adopts the inorganic or organic compound that contains or can produce carbonic acid gas, ammonia under application conditions in (nitrogen+carbonic acid gas)-tensio-active agent-alkali compound system that steam flood, steam stimulation performance history use, effective in 0.1～5.0% scope that common massfraction is the injecting steam quality, effect is better when its massfraction is 0.5～3.5% scope of injecting steam quality, and when its massfraction be the injecting steam quality 1.0～3.0% the time best results.
Nitrite in preparation method's of the present invention suitable heavy crude reservoir employing steam flood, (nitrogen+carbonic acid gas)-tensio-active agent-alkali compound system that the steam stimulation performance history is used, effective in 0.05～3.5% scope that common massfraction is the injecting steam quality, effect is better when its massfraction is 0.1～3.0% scope of injecting steam quality, and when its massfraction be the injecting steam quality 0.5～1.5% the time best results.
It is urea, volatile salt and bicarbonate of ammonia that preparation method's of the present invention suitable heavy crude reservoir adopts the inorganic or organic compound that contains or can produce carbonic acid gas, ammonia under application conditions in (nitrogen+carbonic acid gas)-tensio-active agent-alkali compound system that steam flood, steam stimulation performance history use, mol ratio between the nitrite can be regulated according to geologic feature, developing history and the present situation of concrete heavy crude reservoir, the ratio of carbonic acid gas and nitrogen in the regulation system is to reach best result of use.
Now illustrate respectively and be fit to the excellent application performance energy that heavy crude reservoir adopts (nitrogen+carbonic acid gas)-tensio-active agent-alkali compound system of steam flood, the application of steam stimulation performance history with example:
Embodiment 1
Single 56 7 * 11 well groups in Bin Nan oil field comprise 56-7 * 9,56-8-12,56-5-11,56-8 * 10,56-9 * 11,56-6 * 10 and 56-7 * 11 totally seven mouthfuls of producing wells, since two thousand one through too much round steam stimulation, now adopt steam driving exploitation, extremely serious shaft bottom vapour occurs in the steam treatment process before the measure and scurried problem, cause the producing well wellhead temperature too high, blowing appears in the part producing well.In 13 days～July 1 June in 2003 during, adopted (nitrogen+carbonic acid gas)-tensio-active agent-alkali compound system technology 56-7 * 11 well group steam floods.After the steam treatment one day, 6 tons of the surfactant solns (component A, active constituent content 40%) of better heat stability and the aqueous solution (B component, solid content 50%) of urea and nitrite are alternately clamp-oned 56-7 * 11 wells for 25 tons, carry out conventional steam flood subsequently.Construction back vapour is scurried phenomenon and is obviously died down, and except that 56-9 * 11 well vapour were scurried seriously, all the other 5 mouthfuls of wells vapour all do not occur and scurry.56-7 * 9 well oil offtake obviously increase; 56-8 * 10 are by the not fuel-displaced oil offtake that reaches present 10t/d; The 56-8-12 well is moisture have been dropped to about 70% by 80～90% before the test, and oil offtake has been risen to about present 10t/d by 3 preceding～5t/d of test; 56-6 * 10 wells are by taking out the motionless ordinary production that reached.Well group accumulative total increases 1577 tons of oil.
Embodiment 2
Gudao oilfield GD1-15 * 522 wells adopt the steam stimulation mode to exploit, construction average day of the previous year liquid 23.2t, oil mass 3.6.t, moisture 84.5%, the 2001-11-30 construction, inject surfactant soln (the component A of better heat stability, the aqueous solution (the B component of active constituent content 40%) 6 tons, urea and nitrite, solid content 50%) 60 ton, annotate 2352 tons of vapour amounts, construction back average day liquid 53.6t, oil mass 12.4.t, moisture 76.9%, validity period surpasses 420 days, totally increases 3696 tons of oil in by the end of January, 2003 by.
Embodiment 3
Existing oil field, river grass 20 block C20-8-8 wells adopt the steam stimulation mode to exploit, and drainage period is 8 days before the C20-8-8 well construction, average day oily 4.2t, average moisture 79.7%.The 2001-07-30 construction, inject surfactant soln (the component A of better heat stability, the aqueous solution (the B component of active constituent content 40%) 6 tons, urea and nitrite, solid content 50%) 60 tons, annotates 2352 tons of vapour amounts, construction back drainage period 0 day, the highest day oily 38t, about average day produce oil 20t, validity period surpasses 420 days, and tired in by the end of January, 2002 oil is 1096 tons by.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (6)
1, a kind of suitable preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist is characterized in that:
The non-ionic type of step 1, heat-obtaining stability sulfonated, heavy alkylbenzene sulfonate type, sulfonated petro-leum type, sulphur hydrocarbylation preferably, the alkyl phenolic resin class tensio-active agent of hydrocarbylation;
Step 2, get and contain or under application conditions, can generate ammonia and CO
2Organic or inorganic compound, nitrite be dissolved in water and make the certain mass fractional aqueous solution, and the compound that can produce nitrogen with ammonia react;
Step 3, can combine by required proportioning with the compound that ammonia react is produced nitrogen described tensio-active agent of step 1 and step 2 are described, constitute the compound system of (nitrogen-carbonic acid gas)-tensio-active agent-alkali.
2, the suitable preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist according to claim 1, it is characterized in that: the described tensio-active agent of step 1 adopts sulfonated, heavy alkylbenzene sulfonate, sulfonated petro-leum, the non-ionic type of sulphur hydrocarbylation, the alkyl phenolic resin of hydrocarbylation, and its massfraction that uses is 0.05～1.5% of injecting steam quality.
3, the suitable preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist according to claim 1, it is characterized in that: step 2 is described can to generate ammonia and CO
2The organic or inorganic compound be urea, carbonic acid ammonia and ammonium hydrogencarbonate, its massfraction that uses is 0.1～5.0% of injecting steam quality.
4, according to claim 1 with require the 3 described suitable preparation methods that improve heavy crude heat extraction effect CO2-N2 foam composite synergist, it is characterized in that: the described compound that can produce nitrogen with ammonia react of step 2 is a nitrite, recommend to use Sodium Nitrite, its massfraction that uses is 0.05～3.5% of injecting steam quality.
5, the suitable preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist according to claim 1 is characterized in that: can produce alkaline matter after the described compound system reaction of step 3.
6, be suitable for the preparation method who improves heavy crude heat extraction effect CO2-N2 foam composite synergist according to claim 1 or 5, it is characterized in that: the described compound system of step 3 can be regulated CO according to oil reservoir feature, recovery percent of reserves
2-N
2Ratio.
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| CN100430455C (en) * | 2006-09-29 | 2008-11-05 | 山东大学 | High temperature stratum self-generating foam composition and application thereof in viscous oil exploitation |
| CN102153994A (en) * | 2011-01-30 | 2011-08-17 | 中国石油天然气股份有限公司 | High-temperature miscible phase temporary plugging and sealing agent and preparation method thereof |
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| CN106468161A (en) * | 2015-08-14 | 2017-03-01 | 中国石油化工股份有限公司 | A kind of oil production method for fractured carbonate rock water logging heavy crude reservoir |
| CN107091075A (en) * | 2010-04-12 | 2017-08-25 | 盘锦河升大地石油科技有限公司 | A kind of exploitation method of thick oil type oil deposit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100430455C (en) * | 2006-09-29 | 2008-11-05 | 山东大学 | High temperature stratum self-generating foam composition and application thereof in viscous oil exploitation |
| CN107091075A (en) * | 2010-04-12 | 2017-08-25 | 盘锦河升大地石油科技有限公司 | A kind of exploitation method of thick oil type oil deposit |
| CN102153994A (en) * | 2011-01-30 | 2011-08-17 | 中国石油天然气股份有限公司 | High-temperature miscible phase temporary plugging and sealing agent and preparation method thereof |
| CN102153994B (en) * | 2011-01-30 | 2013-07-10 | 中国石油天然气股份有限公司 | High-temperature miscible phase temporary plugging and sealing agent and preparation method thereof |
| CN102838978A (en) * | 2012-09-18 | 2012-12-26 | 济南大学 | Preparation method and application of autogeneration gas foam composite oil-displacing agent under shaft |
| CN102838978B (en) * | 2012-09-18 | 2014-12-24 | 济南大学 | Preparation method and application of autogeneration gas foam composite oil-displacing agent under shaft |
| CN106468161A (en) * | 2015-08-14 | 2017-03-01 | 中国石油化工股份有限公司 | A kind of oil production method for fractured carbonate rock water logging heavy crude reservoir |
| CN111139051A (en) * | 2020-04-07 | 2020-05-12 | 山东新港化工有限公司 | Foam channeling sealing agent for CO2 flooding of heavy oil reservoir and preparation method and application thereof |
| CN113236204A (en) * | 2021-05-17 | 2021-08-10 | 付万春 | Surface-active graphene and industrial flue gas foam water-control oil-gas displacement method and system |
| CN113236204B (en) * | 2021-05-17 | 2024-01-26 | 付万春 | Surface active graphene and industrial flue gas foam water control oil gas displacement method and system |
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