CN106281282A - One improves oil recovery factor oil displacement agent and preparation thereof and using method - Google Patents
One improves oil recovery factor oil displacement agent and preparation thereof and using method Download PDFInfo
- Publication number
- CN106281282A CN106281282A CN201610634014.8A CN201610634014A CN106281282A CN 106281282 A CN106281282 A CN 106281282A CN 201610634014 A CN201610634014 A CN 201610634014A CN 106281282 A CN106281282 A CN 106281282A
- Authority
- CN
- China
- Prior art keywords
- oil
- displacement agent
- oil displacement
- recovery factor
- agent
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Abstract
The invention belongs to oil gas field technical field of chemistry, open one improves oil recovery factor oil displacement agent, by percentage to the quality, the inventory accounting of each component is: petroleum sulfonate 35%～40%, dimethyl dodecyl amine oxide 24%～27%, composite initiator 1%～3%, NPE 5%～10%, water 20%～35%.This oil displacement agent is with aqueous solution as Transfer Medium, effectively molecule relies on electrostatic interaction to adsorb in electronegative rock surface, form ultrathin membrane, reduce the adhesion work between oil film and rock surface, change reservoir surface character and with the interacting state of crude oil, during injecting fluid scouring hole, constantly peeled off rock surface by crude oil take stratum out of, reach to improve the purpose of oil recovery factor.The present invention has the features such as interfacial tension is low, concentration is low, low cost, construction technology simple, non-environmental-pollution, applies and can be effectively improved oil recovery factor in actual production.
Description
Technical field
The invention belongs to oil gas field technical field of chemistry, be specifically related to a kind of oil displacement agent for improving oil recovery factor,
It is mainly used in the raising that sandstone is main low permeability reservoir oil recovery factor.
Background technology
Along with petroleum resources demand is continuously increased by the whole world, the ratio that unconventional petroleum resources is shared in petroleum resources
Weight is increasing, and the exploration and development center of gravity of petroleum resources progressively shifts to unconventional ultra-low penetration oil-gas reservoir.
At present, China's LOW PERMEABILITY RESERVOIR proved reserves reach more than the 70% of gross reserves, are emphasis and the difficult point of following exploitation.So
And develop through long-term injecting water, the main oilfield of China has been enter into high water cut rate, after entering high water-cut stage exploitation, and oil production
Successively decreasing quickening, filled drive recovery ratio is typically 10～18%, and recovery ratio is low, if the main way with raising Liquid output is protected
Hold not dropping or few fall of oil production, then liquid oil is drastically accelerated than growth rate, and aquifer yield increases considerably.
Currently used oil displacement agent product effect is single, and concentration is high, and environmental pollution is serious.Skill is produced for solving oil field
Practical problem in art and economically, improve crude oil ultimate recovery, then need to develop and a kind of have higher displacement efficiency
Novel oil displacement agent.This chemical agent can reduce oil water interfacial tension, changes reservoir wettability, should have on reservoir rocks surface
Adsorbance little, adsorption losses is less, and concentration is low, low cost, displacement of reservoir oil rate advantages of higher.
Summary of the invention
The technical problem to be solved in the present invention: existing oil displacement agent product effect is single, usage amount is big, brings bigger to environment
Pressure.Accordingly, it would be desirable to develop a kind of novel oil displacement agent with higher displacement efficiency, improve the recovery ratio of crude oil.
Solve the technical scheme of the problems referred to above: providing of the invention is a kind of for improving driving of oil recovery factor
Oil preparation.Oil displacement agent of the present invention can reduce oil water interfacial tension, changes reservoir wettability, has on reservoir rocks surface
Adsorbance is little, and adsorption losses is less, and concentration is low, low cost, displacement of reservoir oil rate advantages of higher.Meanwhile, the present invention gives institute
State the preparation method of oil displacement agent, and its using method.
Specifically, the present invention adopts the technical scheme that:
A kind of raising oil recovery factor oil displacement agent, by percentage to the quality, the inventory accounting of each component is:
Petroleum sulfonate used by the present invention is that the leftover bits and pieces producing alkylbenzene is made, and with oil and fraction thereof as raw material, uses
Sulfonating agent sulfonation, then the product made with alkali neutralization, can be its sodium salt, potassium salt, magnesium salt, amine salt and ammonium salt etc., such as oil sulphur
Acid sodium, petrolic magnesium sulfonate etc..
Composite initiator used by the present invention is sodium sulfite and the mixture of composite sulfur hydrochlorate, sodium sulfite and sulfate composite
The mass ratio of salt is: sodium sulfite: composite sulfur hydrochlorate=1:2.Composite sulfur hydrochlorate can be 12 hydrazine aluminum sulfate potassium, six hydrations
Ferrous ammonium sulfate etc..
Another aspect, the present invention gives a kind of preparation method improving oil recovery factor oil displacement agent: accurately weigh
Described petroleum sulfonate, dimethyl dodecyl amine oxide, composite initiator, NPE and water, by described thing
Material puts in reactor, and under the conditions of temperature 65 DEG C, stirring reaction 5h can be prepared by described oil displacement agent.
The described oil displacement agent prepared by said method, the interfacial tension under the conditions of described oil displacement agent concentration 1.5%, 25 DEG C
Less than 5 × 10-3MN/m, pH value range is 6～8.Specifically, the quality of described oil displacement agent product reaches following technical specification,
It is shown in Table 1.
Table 1 technical target of the product
Further, the present invention gives a kind of using method improving oil recovery factor oil displacement agent, according to water filling gauge
Calculating the consumption of described oil displacement agent, fill described oil displacement agent to injecting in water, oil displacement agent consumption and water injection rate mass ratio are 0.1
～0.3%.
Raising oil recovery factor oil displacement agent of the present invention, at least has following beneficial effect or an advantage:
Oil displacement agent of the present invention is to produce the petroleum-sulfonate oil displacement agent that the leftover bits and pieces of alkyl benzene is made, this displacement of reservoir oil
Agent mechanism of oil displacement is different from conventional chemical agent, and oil displacement agent molecule sticks to rock surface by chemisorbed and formed complete, continuous
Ultrathin membrane, reduces the adhesion between crude oil and rock surface or peels off the absorption moisture film at pore throat surface parcel free state crude oil,
Thus improve recovery ratio.
Oil displacement agent of the present invention has ultralow interfacial tension, and interfacial tension is less than 5 × 10-3MN/m, interfacial tension is than often
Rule oil displacement agent reduces by more than 99%, has good wettability and penetrating power.Oil displacement agent of the present invention is mainly used in sand
Rock is the raising of main low permeability reservoir oil recovery factor.
Along with exploitation and the old filed exploitation of low permeability oil field enter middle and late stage, oil recovery factor is gradually lowered, serious shadow
Ringing the normal production in oil field, the novel oil displacement agent with excellent oil displacement efficiency will have wide market prospect.
Accompanying drawing explanation
Oil displacement agent described in Fig. 1 mono-embodiment is at interfacial tension (25 DEG C) figure of variable concentrations oil displacement agent solution.
Described in Fig. 2 mono-embodiment, the adsorbance of the rock core of oil displacement agent is with the variation diagram of injected slurry volume.
The immersion test comparison diagram of oil displacement agent described in Fig. 3 mono-embodiment.
Detailed description of the invention
Below by example, the present invention will be further described, it should be noted that following example be only the present invention its
In example, do not represent the rights protection scope that the present invention is limited, the scope of the present invention with claims is
Accurate.
Embodiment 1
The present embodiment provides the composition of a kind of preferred described oil displacement agent, by percentage to the quality, the inventory of each component
Accounting is: petroleum sulfonate 35%, dimethyl dodecyl amine oxide 24%, composite initiator 1%, NPE
5%, water 35%.
Preparation method: by 350kg petroleum sulfonate, 240kg dimethyl dodecyl amine oxide, 10kg composite initiator,
50kg NPE and 350kg water stir reaction 5h under the conditions of temperature 65 DEG C and can be prepared by improving recovery ratio with driving
Oil preparation product.
Embodiment 2
The present embodiment provides the composition of a kind of preferred described oil displacement agent, by percentage to the quality, the inventory of each component
Accounting is: petroleum sulfonate 40%, dimethyl dodecyl amine oxide 27%, composite initiator 3%, NPE
10%, water 20%.
Preparation method: by 400kg petroleum sulfonate, 270kg dimethyl dodecyl amine oxide, 30kg composite initiator,
100kg NPE and 200kg water stir reaction 5h under the conditions of temperature 65 DEG C and can be prepared by improving recovery ratio use
Oil displacement agent product.
Embodiment 3
The present embodiment provides the composition of a kind of preferred described oil displacement agent, by percentage to the quality, the inventory of each component
Accounting is: petroleum sulfonate 36%, dimethyl dodecyl amine oxide 25%, composite initiator 2%, NPE
8%, water 29%.
Preparation method: by 360kg petroleum sulfonate, 250kg dimethyl dodecyl amine oxide, 20kg composite initiator,
80kg NPE and 290kg water stir reaction 5h under the conditions of temperature 65 DEG C and can be prepared by improving recovery ratio with driving
Oil preparation product.
Embodiment 4
The present embodiment provides the composition of a kind of preferred described oil displacement agent, by percentage to the quality, the inventory of each component
Accounting is: petroleum sulfonate 37%, dimethyl dodecyl amine oxide 26%, composite initiator 2%, NPE
6%, water 29%.
Preparation method: by 370kg petroleum sulfonate, 260kg dimethyl dodecyl amine oxide, 20kg composite initiator,
60kg NPE and 290kg water stir reaction 5h under the conditions of temperature 65 DEG C and can be prepared by improving recovery ratio with driving
Oil preparation product.
Embodiment 5
The evaluation of oil displacement agent solution interface tension force.Under variable concentrations, the interfacial tension measurement result of oil displacement agent is shown in Fig. 1, from figure
It is found that the ability of novel oil displacement agent reduction interfacial tension has had the raising of high degree, than conventional oil displacement agent (interface in 1
Tension force about 0.1mN/m) surface tension reduce by more than 99%, minimum reach 4.5 × 10-3MN/m, when oil displacement agent solution concentration
During more than 0.5%, the increase interfacial tension along with concentration reduces and inconspicuous.
Embodiment 6
The evaluation of oil displacement agent adsorbance.
Dynamic adsorbance refers in the adsorbance that adsorbent to be measured measures under conditions of flowing.Experiment uses natural rock
The heart, perm-plug method is 0.6 × 10-3μm2, porosity is 10.6%, puts into core holding unit after saturated oils, uses 1.5% displacement of reservoir oil
Agent solution displacement, gathers the liquid that goes out of displacement simultaneously, and owing to pore volume is less for 2.53ml, therefore every 2pv measures the denseest
Degree, obtains the relation of dynamic adsorbance and injected slurry volume as shown in Figure 2.
From fig. 2 it can be seen that oil displacement agent solution injection hole gap volume is to after 12pv, absorption progressivelyes reach balance, maximum
Adsorbance is 3.28mg/g sand.Dynamic adsorbance is not significantly increased, and analyzes its reason and is primarily due to, and dynamic adsorption is one
The process that constantly absorption is constantly desorbed again, until absorption reaches balance.
Embodiment 7
The immersion test evaluation of oil displacement agent.
Improve the actual effect of oil-sand surface wettability for ease of observing oil-driving agent, carry out immersion test.Drive for simulation
Oil preparation injects the situation on stratum, first puts into Kaolin in oil displacement agent solution, montmorillonite adsorbs, and places into oil afterwards
Sand.
Experimental procedure is as follows:
1. the oil displacement agent solution that concentration is 1.5% is put, with the ratio of 9:1 by Kaolin, montomorillonite, illitic mineral powder
Put in solution, be stirred until homogeneous mixing with Glass rod.
2., after solution recovers clarification, upper clear supernate is taken as immersion solution.
3. natural for non-washing oil oil-sand is poured into respectively simulated formation water and step 2. in oil displacement agent solution in.
4. 12h is soaked under the conditions of solution being placed on 50 DEG C.
Experimental result is as shown in Figure 3.Left side is oil displacement agent solution；Right side is simulated formation water.Can be substantially from Fig. 3
Going out, the morphological differences after oil-sand soaks in two kinds of different solutions is huge.Oil-sand in oil displacement agent solution is at ultralow interfacial tension
Effect under, the crude oil of its surface attachment is stripped dispersion and in the solution or floats over solution surface, and whole solution colour becomes
For black.And the oil-sand in simulated formation water does not has significant change, only a small amount of tiny oil droplets spins off and swims in formation water
Surface and beaker junction.
Embodiment 8
Oil displacement agent rock core displacement test is evaluated.Oil displacement agent concentration is 1.5%, tests under condition of different temperatures, first
By rock core water drive after saturated oils to aqueous more than 90%, use oil displacement agent solution to be injected separately into afterwards, then carry out follow-up water
Drive.Experimental result is shown in Table 2.
Recovery ratio under the different injection rate of table 2
Experimental result (table 2) shows, when oil displacement agent concentration is 1.5%, along with the continuous rising of temperature, recovery ratio degree
Improving constantly, reaching 34.8%, but during higher than 70 DEG C, recovery ratio the most substantially increases.
Oil displacement agent pH value range of the present invention is 6～8, its using method: calculate its consumption according to daily water-injection rate, typically
Consumption is oil displacement agent and water injection rate mass ratio 0.1～0.3%, and directly filling is in injecting water.
Oil displacement agent of the present invention is with aqueous solution as Transfer Medium, and effective molecule relies on electrostatic interaction to adsorb in elecrtonegativity
Rock surface, form ultrathin membrane, reduce the adhesion work between oil film and rock surface, change the character on reservoir surface and with former
The interacting state of oil, is constantly peeled off rock surface by crude oil during injecting fluid scouring hole and takes stratum out of, reach
Improve the purpose of oil recovery factor.Oil displacement agent of the present invention has that interfacial tension is low, concentration is low, low cost, construction work
The features such as skill is simple, non-environmental-pollution, apply and can be effectively improved oil recovery factor in actual production.
Above in conjunction with embodiment, the present invention done further narration, but the present invention has been not limited to above-mentioned embodiment,
In the ken that one skilled in the relevant art is possessed, it is also possible to make on the premise of without departing from present inventive concept
Various changes.
Claims (5)
1. improving an oil recovery factor oil displacement agent, by percentage to the quality, the inventory accounting of each component is:
Raising oil recovery factor oil displacement agent the most according to claim 1, it is characterised in that described composite initiator is sub-
Sodium sulfate and the mixture of composite sulfur hydrochlorate, sodium sulfite with the mass ratio of composite sulfur hydrochlorate is: sodium sulfite: composite sulfur hydrochlorate
=1:2.
3. the preparation method improving oil recovery factor oil displacement agent, it is characterised in that accurately weigh described petroleum sulfonate,
Dimethyl dodecyl amine oxide, composite initiator, NPE and water, put into described material in reactor,
Under the conditions of temperature 65 DEG C, stirring reaction 5h can be prepared by described oil displacement agent.
Preparation method the most according to claim 3, it is characterised in that prepare 1.5%, 25 DEG C of conditions of described oil displacement agent concentration
Under interfacial tension less than 5 × 10-3MN/m, pH value range is 6～8.
5. the using method improving oil recovery factor oil displacement agent, it is characterised in that calculate the described displacement of reservoir oil according to water injection rate
The consumption of agent, fills described oil displacement agent to injecting in water, oil displacement agent consumption and water injection rate mass ratio are 0.1～0.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610634014.8A CN106281282A (en) | 2016-08-04 | 2016-08-04 | One improves oil recovery factor oil displacement agent and preparation thereof and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610634014.8A CN106281282A (en) | 2016-08-04 | 2016-08-04 | One improves oil recovery factor oil displacement agent and preparation thereof and using method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106281282A true CN106281282A (en) | 2017-01-04 |
Family
ID=57665063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610634014.8A Pending CN106281282A (en) | 2016-08-04 | 2016-08-04 | One improves oil recovery factor oil displacement agent and preparation thereof and using method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106281282A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107338037A (en) * | 2017-07-20 | 2017-11-10 | 陕西森瑞石油技术开发有限公司 | A kind of low permeability oil field oil displacement agent and preparation method and application |
| CN109207134A (en) * | 2018-10-23 | 2019-01-15 | 天津大港油田滨港集团博弘石油化工有限公司 | Efficient surfactant oil displacement composition and preparation method thereof |
| CN110819331A (en) * | 2019-11-19 | 2020-02-21 | 西安石油大学 | Intelligent oil displacement agent capable of identifying oil and water and preparation method thereof |
| CN115466610A (en) * | 2022-11-03 | 2022-12-13 | 海域泰和(山东)能源科技有限公司 | Oil displacement agent for improving recovery ratio of sandstone oil reservoir and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4016932A (en) * | 1975-12-24 | 1977-04-12 | Texaco Inc. | Surfactant oil recovery method for use in high temperature formations containing water having high salinity and hardness |
| CN1865392A (en) * | 2006-06-15 | 2006-11-22 | 中国石化股份胜利油田分公司地质科学研究院 | Highly effective mixed oil expellant applied to tertiary oil recovery and its preparation method |
| CN102504788A (en) * | 2011-10-25 | 2012-06-20 | 中国石油天然气股份有限公司 | Foaming agent suitable for oil-field development |
| CN102977872A (en) * | 2012-11-29 | 2013-03-20 | 辽宁石油化工大学 | Enhanced foam oil-displacing agent for improving oil recovery rate in tertiary oil recovery, and preparation method thereof |
| CN103254883A (en) * | 2013-05-15 | 2013-08-21 | 中国石油大学(华东) | Oil-displacing agent and oil-displacing method for enhancing recovery ratio of high-temperature, high-salinity and high-hardness reservoir crude oil |
| CN103409123A (en) * | 2013-09-04 | 2013-11-27 | 上海海瑰化工科技有限公司 | Application of glycine betaine surface active agent system in chemical oil displacement |
| CN104350124A (en) * | 2012-06-11 | 2015-02-11 | 巴斯夫欧洲公司 | Method of recovering oil from subterranean formation |
-
2016
- 2016-08-04 CN CN201610634014.8A patent/CN106281282A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4016932A (en) * | 1975-12-24 | 1977-04-12 | Texaco Inc. | Surfactant oil recovery method for use in high temperature formations containing water having high salinity and hardness |
| CN1865392A (en) * | 2006-06-15 | 2006-11-22 | 中国石化股份胜利油田分公司地质科学研究院 | Highly effective mixed oil expellant applied to tertiary oil recovery and its preparation method |
| CN102504788A (en) * | 2011-10-25 | 2012-06-20 | 中国石油天然气股份有限公司 | Foaming agent suitable for oil-field development |
| CN104350124A (en) * | 2012-06-11 | 2015-02-11 | 巴斯夫欧洲公司 | Method of recovering oil from subterranean formation |
| CN102977872A (en) * | 2012-11-29 | 2013-03-20 | 辽宁石油化工大学 | Enhanced foam oil-displacing agent for improving oil recovery rate in tertiary oil recovery, and preparation method thereof |
| CN103254883A (en) * | 2013-05-15 | 2013-08-21 | 中国石油大学(华东) | Oil-displacing agent and oil-displacing method for enhancing recovery ratio of high-temperature, high-salinity and high-hardness reservoir crude oil |
| CN103409123A (en) * | 2013-09-04 | 2013-11-27 | 上海海瑰化工科技有限公司 | Application of glycine betaine surface active agent system in chemical oil displacement |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107338037A (en) * | 2017-07-20 | 2017-11-10 | 陕西森瑞石油技术开发有限公司 | A kind of low permeability oil field oil displacement agent and preparation method and application |
| CN109207134A (en) * | 2018-10-23 | 2019-01-15 | 天津大港油田滨港集团博弘石油化工有限公司 | Efficient surfactant oil displacement composition and preparation method thereof |
| CN109207134B (en) * | 2018-10-23 | 2021-02-19 | 天津大港油田滨港集团博弘石油化工有限公司 | Surfactant composition for efficient oil displacement and preparation method thereof |
| CN110819331A (en) * | 2019-11-19 | 2020-02-21 | 西安石油大学 | Intelligent oil displacement agent capable of identifying oil and water and preparation method thereof |
| CN115466610A (en) * | 2022-11-03 | 2022-12-13 | 海域泰和(山东)能源科技有限公司 | Oil displacement agent for improving recovery ratio of sandstone oil reservoir and preparation method and application thereof |
| CN115466610B (en) * | 2022-11-03 | 2023-02-21 | 海域泰和(山东)能源科技有限公司 | Oil displacement agent for improving recovery ratio of sandstone oil reservoir and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Xiangzeng et al. | Method of moderate water injection and its application in ultra-low permeability oil reservoirs of Yanchang Oilfield, NW China | |
| CN102796498B (en) | Foam drilling fluid | |
| CN106281282A (en) | One improves oil recovery factor oil displacement agent and preparation thereof and using method | |
| CN103333666A (en) | Solid-free well-completion confining liquid and preparation method thereof | |
| Ge et al. | Surfactant enhanced oil recovery in a high temperature and high salinity carbonate reservoir | |
| CN103965852A (en) | Composite oil displacement agent containing polymer and cationic/anionic surfactant, and oil displacement method | |
| CN113185657A (en) | Nano material and preparation method and application thereof | |
| Udoh et al. | Formulation of water-based drilling fluid using local materials | |
| CN106634899A (en) | A liquid colloid filling low-temperature well-cementing cement mortar system | |
| CN111944506A (en) | Blood pressure-reducing injection-increasing active agent and preparation method thereof | |
| CN103351857A (en) | Salt-tolerant wormlike micellar system, preparation method and application thereof in flooding oil | |
| CN101987954B (en) | Alkali-free compound flooding composition | |
| CN106867497B (en) | Oil displacement system and method for low-permeability oil reservoir | |
| CN104073231B (en) | A kind of combination flooding oil displacement agent | |
| Wanchao et al. | Alkaline-surfactant-polymer combination flooding for improving recovery of the oil with high acid value | |
| CN103937480B (en) | A kind of organic base/surfactant binary composite oil-displacing system and preparation method thereof and application | |
| Fjelde et al. | Improvement of Spontaneous Imbibition in Carbonate Rocks by CO²-saturated Brine | |
| CN110028939A (en) | A kind of preparation method of coating agent | |
| CN204008567U (en) | Containing generation and the acoustic-electric characteristic test integrated apparatus of gas hydrate rock sample | |
| CN106368679B (en) | A kind of offshore oilfield Uranium determination agent and its application method | |
| CN204008245U (en) | A kind of generating apparatus containing gas hydrate rock sample | |
| CN114644914B (en) | Oilfield depressurization injection increasing agent and preparation method and application thereof | |
| CN115109575A (en) | Low permeability reservoir CO 2 Nano-foam oil washing agent for flooding and preparation method and application thereof | |
| CN111925477B (en) | Preparation method of fluorine-containing thickening agent capable of thickening hydrochloric acid solution | |
| Kathel | Experiments and modeling of wettability alteration in low permeability porous media |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |