CN1228412C - 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
- Publication number
- CN1228412C CN1228412C CN 200310116906 CN200310116906A CN1228412C CN 1228412 C CN1228412 C CN 1228412C CN 200310116906 CN200310116906 CN 200310116906 CN 200310116906 A CN200310116906 A CN 200310116906A CN 1228412 C CN1228412 C CN 1228412C
- Authority
- CN
- China
- Prior art keywords
- preparation
- steam
- active agent
- nitrite
- heat extraction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The present invention provides a method for preparing CO2-N2 foam compound synergists for improving thick oil thermal recovery effect. The present invention comprises: resin surface active agents, such as alpha-olefin sulphonate with good thermal stability, heavy alkylbenzene sulfonate, petroleum sulfonate, sulfonyl alkylation non-ionic resin surface active agents and alkylation alkyl phenolic resin surface active agents, are adopted; a (nitrogen-carbon dioxide)-surface active agent-alkali compound system is composed of the resin surface active agents, organic or inorganic compounds which can generate ammonia and CO2, and compounds which can have a reaction with ammonia to produce nitrogen; negative factors which influence the recovery yield of the thermal recovery, such as steam gravity increasing and hydrodynamics fingering in the process of injecting high-temperature steam in thick oil thermal recovery, and steam quick propelling in a high permeability zone and low water recovery ratio, which are caused by the difference of the permeation rate of an oil reservoir, are eliminated. The present invention has the advantages that the CO2-N2 has a good frothing peoperty, a plurality of negative factors which can influence the recovery yield of the thick oil thermal recovery are effectively eliminated in the process of injecting steam and the process of recovering water soaking steam, and the recovery ratio of raw oil in the process of the thick oil thermal recovery is obviously increased.
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-surperficial Lip river property 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 sulfonated, heavy alkylbenzene sulfonate type, sulfonated petro-leum type, the non-ionic type of sulphur hydrocarbylation and/or 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 or 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 one 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 and/or 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 close 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;
Aforesaid being applicable to improved heavy crude heat extraction effect CO
2-N
2The preparation method of foam composite synergist, described tensio-active agent is the non-ionic type of sulfonated, heavy alkylbenzene sulfonate type, sulfonated petro-leum type, sulphur hydrocarbylation and/or the alkyl phenolic resin of hydrocarbylation etc., recommends to use sulfonated and/or heavy alkylbenzene sulfonate type;
Aforesaid being applicable to improved heavy crude heat extraction effect CO
2-N
2The preparation method of foam composite synergist, the described inorganic or organic compound that contains or can produce carbonic acid gas, ammonia under application conditions can be urea, volatile salt or bicarbonate of ammonia, recommends to use urea;
Aforesaid being applicable to improved heavy crude heat extraction effect CO
2-N
2The preparation method of foam composite synergist, described nitrite can be Sodium Nitrite, potassium nitrite or ammonium nitrite, recommends to use Sodium Nitrite;
Aforesaid being applicable to improved heavy crude heat extraction effect CO
2-N
2The preparation method of foam composite synergist, the thermolysis at high temperature of described urea, volatile salt or 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;
Aforesaid being applicable to improved heavy crude heat extraction effect CO
2-N
2The preparation method of foam composite synergist, the thermolysis at high temperature of described urea, volatile salt or 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 and improves heavy crude heat extraction effect CO
2-N
2The preparation method of 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 heavy crude heat extraction effect CO that improves
2-N
2The preparation method of 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 and/or the alkyl phenolic resin class tensio-active agent of hydrocarbylation;
Step 2, get and closed 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;
Step 3, the described tensio-active agent of step 1 is combined by required proportioning with the described aqueous solution of step 2, 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 and/or the alkyl phenolic resin of hydrocarbylation, and its massfraction that uses is for being 0.05～1.5% of injecting steam quality.
Wherein the described organic or inorganic compound that can generate ammonia and CO2 of step 2 is urea, volatile salt or bicarbonate of ammonia, and 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.
The inorganic or organic compound that closes or can produce carbonic acid gas, ammonia under application conditions 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 is urea, volatile salt or bicarbonate of ammonia, 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 or 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 itself and 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, effective constituent resultant 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 is 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 (8)
1, a kind of suitable heavy crude heat extraction effect CO that improves
2-N
2The preparation method of 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 and/or 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;
Step 3, the described tensio-active agent of step 1 is combined by required proportioning with the described aqueous solution of step 2, constitute the compound system of (nitrogen-carbonic acid gas)-tensio-active agent-alkali.
2, the suitable heavy crude heat extraction effect CO that improves according to claim 1
2-N
2The preparation method of foam composite synergist, 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 and/or the alkyl phenolic resin of hydrocarbylation, and its massfraction that uses is 0.05～1.5% of injecting steam quality.
3, the suitable heavy crude heat extraction effect CO that improves according to claim 1 and 2
2-N
2The preparation method of foam composite synergist, tensio-active agent is sulfonated and/or heavy alkylbenzene sulfonate.
4, the suitable heavy crude heat extraction effect CO that improves according to claim 1
2-N
2The preparation method of foam composite synergist is characterized in that: step 2 is described can to generate ammonia and CO
2The organic or inorganic compound be urea, volatile salt or bicarbonate of ammonia, its massfraction that uses is 0.1～5.0% of injecting steam quality.
5, according to claim 1 or the 4 described suitable heavy crude heat extraction effect CO that improve
2-N
2The preparation method of foam composite synergist wherein saidly can generate ammonia and CO
2The organic or inorganic compound be urea.
6, the suitable heavy crude heat extraction effect CO that improves according to claim 1
2-N
2The preparation method of foam composite synergist is characterized in that: the described nitrite of step 2 is Sodium Nitrite, potassium nitrite or ammonium nitrite, and its massfraction that uses is 0.05～3.5% of injecting steam quality.
7, according to claim 1 or the 6 described suitable heavy crude heat extraction effect CO that improve
2-N
2The preparation method of foam composite synergist, wherein said nitrite is a Sodium Nitrite.
8, the suitable heavy crude heat extraction effect CO that improves according to claim 1
2-N
2The preparation method of foam composite synergist 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310116906 CN1228412C (en) | 2003-11-28 | 2003-11-28 | Preparation method of CO2-N2 composite foam synergist for improving thick oil heat gathering effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310116906 CN1228412C (en) | 2003-11-28 | 2003-11-28 | Preparation method of CO2-N2 composite foam synergist for improving thick oil heat gathering effect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1546600A CN1546600A (en) | 2004-11-17 |
| CN1228412C true CN1228412C (en) | 2005-11-23 |
Family
ID=34337663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310116906 Expired - Fee Related CN1228412C (en) | 2003-11-28 | 2003-11-28 | Preparation method of CO2-N2 composite foam synergist for improving thick oil heat gathering effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1228412C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445722B (en) * | 2008-12-30 | 2011-10-05 | 合肥新星油田化学剂有限责任公司 | Oil displacement agent suitable for surfactant for low-permeability oilfield, and preparation method thereof |
| CN103031120A (en) * | 2011-09-29 | 2013-04-10 | 中国石油化工股份有限公司 | Foaming agent composition containing alkylphenol ethoxylate benzene sulfonate and application |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107130950A (en) * | 2010-04-12 | 2017-09-05 | 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 |
| 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 channeling sealing agent and preparation method thereof |
| 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 |
| CN111139051B (en) * | 2020-04-07 | 2020-11-20 | 山东新港化工有限公司 | Heavy oil reservoir CO2Foam channeling sealing agent for flooding and preparation method and application thereof |
| 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 |
-
2003
- 2003-11-28 CN CN 200310116906 patent/CN1228412C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101445722B (en) * | 2008-12-30 | 2011-10-05 | 合肥新星油田化学剂有限责任公司 | Oil displacement agent suitable for surfactant for low-permeability oilfield, and preparation method thereof |
| CN103031120A (en) * | 2011-09-29 | 2013-04-10 | 中国石油化工股份有限公司 | Foaming agent composition containing alkylphenol ethoxylate benzene sulfonate and application |
| CN103031120B (en) * | 2011-09-29 | 2014-10-15 | 中国石油化工股份有限公司 | Foaming agent composition containing alkylphenol ethoxylate benzene sulfonate and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1546600A (en) | 2004-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3811504A (en) | Surfactant oil recovery process usable in formations containing water having high concentrations of polyvalent ions such as calcium and magnesium | |
| CN102504794B (en) | Hydrophobically associating polymer and mixed surfactant binary compound oil displacement system | |
| CN1253648C (en) | Thickened oil steam production synergist and its preparing method | |
| CN100591742C (en) | Method of raising oil deposit crude petroleum recovery ratio | |
| CN102952531B (en) | Surfactant for displacing oil of offshore oilfield and preparation method thereof | |
| CN1228412C (en) | Preparation method of CO2-N2 composite foam synergist for improving thick oil heat gathering effect | |
| CN102643636B (en) | Auxiliary enhancement chemical agent for oil extraction with heat | |
| CN102040994B (en) | Haloduric sulfamic-acid-type amphoteric surfactant composite system and application thereof in tertiary oil recovery | |
| CN106801597A (en) | Heavy crude reservoir combined type flooding method and displacement composition | |
| CN102140338A (en) | Fluorocarbon surfactant binary composite foam flooding system | |
| CN103351857B (en) | A kind of salt tolerant worm-like micelle systems, its preparation method and the purposes in the displacement of reservoir oil thereof | |
| CN103114835A (en) | Nitrogen-aided thickened oil formation emulsification and viscosity reduction exploitation method | |
| CN103670351B (en) | A kind of steam flooding exploitation method of heavy crude reservoir | |
| CN1315979C (en) | Biological enzyme oil-displacing agent for increasing crude oil production rate and its oil displacing method | |
| CN101987954B (en) | Alkali-free composite flooding composition | |
| CN103497288B (en) | A kind of AM/AA/HMDAAC/A-β-CD multipolymer and preparation method thereof | |
| CN102838978B (en) | Preparation method and application of autogeneration gas foam composite oil-displacing agent under shaft | |
| CN104559985A (en) | Surfactant polymer composition for oil displacement and application thereof in tertiary oil recovery | |
| CN109456443A (en) | A kind of functional form polyacrylamide and preparation method thereof | |
| CN104449633A (en) | Crude oil surfactant and preparation method and application thereof | |
| CN104559989A (en) | Hydrocarbyl amine polyoxyethylene ether polyoxypropylene ether sulfonate type betaine | |
| CN1281025A (en) | Three-element built-up composition containing alkylphenylsulfonate surfactant and its application | |
| CN107288596A (en) | A kind of method that oil recovery factor is improved based on organic base ternary composite driving | |
| CN115895632A (en) | Biological imbibition agent for low-permeability reservoir oil displacement and preparation method thereof | |
| CN102153994B (en) | High-temperature miscible phase temporary plugging channeling sealing agent and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |