CN112625665A - Fly ash suspension stable plugging profile control agent and preparation method thereof - Google Patents
Fly ash suspension stable plugging profile control agent and preparation method thereof Download PDFInfo
- Publication number
- CN112625665A CN112625665A CN201910956368.8A CN201910956368A CN112625665A CN 112625665 A CN112625665 A CN 112625665A CN 201910956368 A CN201910956368 A CN 201910956368A CN 112625665 A CN112625665 A CN 112625665A
- Authority
- CN
- China
- Prior art keywords
- fly ash
- suspension
- profile control
- percent
- control 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.)
- Granted
Links
Images
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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the field of water shutoff and profile control of oil-water wells, in particular to a fly ash suspension stabilization plugging profile control agent and a preparation method thereof. The fly ash suspension stable plugging profile control agent comprises the following components in percentage by mass: 10 to 40 percent of fly ash, 2.5 to 5.0 percent of suspension stabilizer, 0 to 2 percent of suspension stabilizer additive, 0.05 to 0.4 percent of dispersant and the balance of water. The mixed system prepared by using pure fly ash as a main agent, a suspending agent and a dispersing agent has good suspensibility, long stability time and low viscosity and is easy to inject. The system is utilized to perform profile control and channeling sealing, unexpectedly, the system not only can improve the steam injection effect, but also has obvious precipitation and oil increasing effects.
Description
Technical Field
The invention relates to the field of water shutoff and profile control of oil-water wells, in particular to a fly ash suspension stabilization plugging profile control agent and a preparation method thereof.
Background
The fly ash is a substance discharged from a coal-fired power plant and collected by an electrostatic dust collector. China is a country with coal as a main energy source, 76% of electric power is generated by coal, the total stockpiling amount of fly ash generated by coal burning is over 10 hundred million tons, and the fly ash is increased at the speed of 0.8 hundred million to 1 hundred million tons per year, so that the coal ash is the largest ash discharge country in the world. The fly ash not only occupies a large amount of land, but also causes serious environmental pollution. The comprehensive utilization of coal-series solid wastes such as fly ash is developed, the sustainable development problems of the Chinese coal industry, the electric power industry and related industries are solved, and the method has important significance for protecting land resources, reducing and eliminating pollution and realizing circular economy.
In the existing plugging profile control process of the oil field, the using amount of the fly ash is small, and the fly ash is mainly used as an auxiliary component:
the Chinese patent application (CN106967403A) discloses a plugging agent for large pore canals or ultrahigh permeability of oil field reservoirs, which comprises a main agent, a curing agent, a retarder, a tackifier and water. The main agent comprises the mixture of calcium oxide, silicon dioxide, aluminum oxide, ferric oxide, sodium silicate and fly ash, wherein the content of the fly ash is 4.9-5.9%.
Chinese patent application (CN108048057A) discloses a profile control agent and a profile control method, wherein the profile control agent comprises a first system and a second system, and the raw materials of the first system comprise, by mass, 10-20% of smectite, 10-25% of fly ash, 5-15% of silicon dioxide, 0.2-0.8% of a modifier, 0.4-1% of a toughening agent, 0.8-2% of an activator and the balance of water; the raw materials of the second system comprise, by mass, 15-25% of calcium chloride or magnesium chloride, 10-25% of water glass, 5-15% of slag powder, 3-10% of sodium fluosilicate and the balance of water. The profile control method comprises the following steps: injecting the first system into the formation; and then respectively injecting the water solution of calcium chloride or magnesium chloride and the mixed solution of water glass, slag powder and water into the stratum to finish profile control.
Lenanjun et al prepared a high temperature plugging agent suitable for YT oil field with a temperature resistant Sulfonated Polymer (SPAM), a water soluble phenolic resin, and fly ash. The orthogonal experiment preferably obtains a system of 0.3 percent of SPAM, 0.04 percent of cross-linking agent and 5 percent of fly ash. The influence of temperature, pH and mineralization on the gelling effect shows that: temperatures of 100 ℃ or higher are detrimental to gel formation; when the pH value is 5, the gelling effect is best; the increase of the mineralization degree is not beneficial to gelatinizing, but when the mineralization degree is about 50000mg/L, the gelatinizing viscosity is still close to 45000m Pa & s; the temperature resistance test result shows that: after aging at 110 ℃ for 20 days, the viscosity of the system is reduced, but the system can still ensure that dehydration is not carried out; the hot rolling experiment shows that: the upper limit of the temperature of the gel is 150 ℃; core experiments show that the system can obviously improve gas injection pressure and slow down gas injection pressure drop (Leyinanjun, Li Shihao, Wangyong, et al. preparation and performance of high-temperature polymer/fly ash gel channeling sealing system [ J ]. application chemical industry, 2015 (4)).
The wetting property of the fly ash and water is poor, the fly ash is not compatible with water when being mixed with water like sand, the fly ash is not good in suspension state in water, sinking retards flowing, is easy to block a pipeline, and is difficult to realize long-distance conveying; therefore, the application of pure fly ash as the main plugging agent is not reported as the additive of the particle plugging agent system such as clay or cement.
At present, the price of the petroleum market is reduced year by year, but the profile control and recovery cost is always kept at a higher level, so that the profile control channeling sealing agent with low production cost and good effect is provided, and the problem to be solved in the field is urgently needed.
Disclosure of Invention
The invention mainly aims to provide a plugging profile control agent taking fly ash as a main agent, which realizes the large-scale application of pure fly ash as the main agent in oil field production and obtains unexpected effects; on the other hand, the defects of high cost and complex process of the existing profile control plugging technology are overcome.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a fly ash suspension stabilization plugging profile control agent, which takes fly ash as a main agent, and the content of the fly ash is 10 wt% -40 wt%.
In the fly ash suspension stabilization plugging profile control agent, the fly ash suspension stabilization plugging profile control agent preferably comprises the following components in percentage by mass: 10 to 40 percent of fly ash, 2.5 to 5.0 percent of suspension stabilizer, 0 to 2 percent of suspension stabilizer additive, 0.05 to 0.4 percent of dispersant and the balance of water.
In the fly ash suspension stabilization plugging profile control agent, the fly ash suspension stabilization plugging profile control agent preferably comprises the following components in percentage by mass: 10-35% of fly ash, 2.5-5.0% of suspension stabilizer, 0-2% of suspension stabilizer additive, 0.05-0.4% of dispersant and the balance of water;
preferably, the composition comprises the following components in percentage by mass: 10 to 30 percent of fly ash, 2.5 to 5.0 percent of suspension stabilizer, 0 to 2 percent of suspension stabilizer additive, 0.05 to 0.4 percent of dispersant and the balance of water;
preferably, the composition comprises the following components in percentage by mass: 10 to 25 percent of fly ash, 2.5 to 5.0 percent of suspension stabilizer, 0 to 2 percent of suspension stabilizer additive, 0.05 to 0.4 percent of dispersant and the balance of water;
preferably, the composition comprises the following components in percentage by mass: 15-25% of fly ash, 2.5-5.0% of suspension stabilizer, 0-2% of suspension stabilizer additive, 0.05-0.4% of dispersant and the balance of water;
preferably, the composition comprises the following components in percentage by mass: 20 to 25 percent of fly ash, 2.5 to 5.0 percent of suspension stabilizer, 0 to 2 percent of suspension stabilizer additive, 0.05 to 0.4 percent of dispersant and the balance of water.
In the above fly ash suspension stabilization plugging profile control agent, preferably, the fly ash does not need to be subjected to classification screening, and the particle size range of the fly ash is 1-100 μm. The fly ash is taken from a coal-fired boiler of a power plant or a steam injection station, and the median particle size D50 can be 22.29 mu m.
In the fly ash suspension stabilization plugging profile control agent, preferably, the suspension stabilizer is sodium bentonite or calcium bentonite. Further preferably, the bentonite described above has a montmorillonite content of > 90% and a particle size in the range of 1-90 μm.
In the fly ash suspension stabilization plugging profile control agent, preferably, the tackifying assistant is sodium carbonate.
In the fly ash suspension stabilization plugging profile control agent, preferably, the dispersant is lignosulfonate. Further preferably, the lignosulfonate molecular weight is 1000-50000 and the lignosulfonate effective concentration is >90 wt%. Further preferably, the lignosulfonate may be sodium lignosulfonate or calcium lignosulfonate.
In another aspect of the present invention, a preparation method of the fly ash suspension stabilization plugging profile control agent is provided, where the preparation method includes the following steps:
adding a suspension stabilizer and a suspension stabilizer additive into water, and uniformly stirring to form a stable suspension; adding a dispersing agent into the suspension, and stirring for 5-15min to obtain a suspension dispersion liquid; adding fly ash into the suspension dispersion liquid, and stirring for 5-15min to obtain the product.
The mixed system prepared by using pure fly ash as a main agent, a suspending agent and a dispersing agent has good suspensibility, long stability time and low viscosity and is easy to inject. The system is utilized to perform profile control and channeling sealing, unexpectedly, the system not only can improve the steam injection effect, but also has obvious precipitation and oil increasing effects. The plugging profile control agent is used as a plugging profile control agent, so that the cost of plugging profile control of an oil field is greatly reduced, and a better plugging effect can be achieved; on the other hand, the invention realizes the large application of the fly ash in the oil field, the usage amount of the fly ash for one-time plugging can reach more than hundred tons, the utilization degree of the fly ash solid waste is improved, and the invention has important significance for the development of ecological environment and circular economy.
The fly ash suspension stable plugging profile control agent has few components, and besides the main components of fly ash and water, the suspending agent and the dispersing agent are cheap materials; the preparation process is simple, and the fly ash does not need to be classified and screened in the preparation process, so that the construction process is simplified.
Drawings
FIG. 1 shows the particle size analysis results of the fly ash plugging profile control agent;
FIG. 2 shows the settling effect of fly ash suspension stabilization plugging profile control agent (right) compared with 36h without suspending agent and dispersing agent;
FIG. 3 shows the field effect of the fly ash suspension stabilization plugging profile control agent after the measure.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, and/or combinations thereof, unless the context clearly indicates otherwise.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
The particle size distribution range of the fly ash used in the embodiment of the invention is shown in figure 1, and the median particle size is 22.29 μm. None of the fly ashes used in the examples was classified and screened.
Example 1 fly ash suspension stabilization plugging profile control agent
The fly ash suspension stable plugging profile control agent comprises the following components in percentage by mass: 40% of fly ash, 5.0% of suspension stabilizer, 2% of suspension stabilizer additive, 0.4% of dispersant and the balance of water.
The suspension stabilizer is sodium bentonite, the dispersant is sodium lignosulfonate, and the suspension stabilizing additive is sodium carbonate.
The preparation method of the fly ash suspension stable plugging profile control agent comprises the following steps:
firstly, 52.6g of water is added into a container, then 5g of sodium bentonite is added under the stirring of 300r/min, then 2g of sodium carbonate is added, the stirring time is 30min, the stirring is uniform, the swelling is fully carried out, and a stable suspension is formed; then adding 0.4g of sodium lignosulfonate into the prepared suspension liquid at the same stirring speed, and stirring for 5min to obtain a suspension dispersion liquid; and finally, adding 40g of fly ash into the prepared suspension dispersion liquid under the stirring at the same rotating speed, and continuously stirring for 10min to obtain the fly ash suspension stabilization plugging profile control agent. The fly ash suspension stable plugging profile control agent prepared according to the proportion is injected into the deep part of the stratum through profile control equipment.
Example 2 fly ash suspension stabilization plugging profile control agent
The fly ash suspension stable plugging profile control agent comprises the following components in percentage by mass: 10% of fly ash, 2.5% of suspension stabilizer, 0.05% of dispersant and the balance of water.
The suspension stabilizer is calcium bentonite, and the dispersant is calcium lignosulfonate.
The preparation method of the fly ash suspension stable plugging profile control agent comprises the following steps:
firstly, 87.45g of water is added into a container, then 2.5g of calcium bentonite is added under the stirring of 300r/min, the stirring time is 30min, the mixture is uniformly stirred and fully swelled, and a stable suspension is formed; then, 0.05g of calcium lignosulphonate is added into the prepared suspension liquid under the same stirring speed, and the suspension liquid is stirred for 5min to obtain suspension dispersion liquid; and finally, adding 10g of fly ash into the prepared suspension dispersion liquid under the stirring at the same rotating speed, and continuously stirring for 15min to obtain the fly ash suspension stabilization plugging profile control agent. The fly ash suspension stable plugging profile control agent prepared according to the proportion is injected into the deep part of the stratum through profile control equipment.
Example 3 fly ash suspension stabilization plugging profile control agent
The fly ash suspension stable plugging profile control agent comprises the following components in percentage by mass: 35% of fly ash, 2.5% of suspension stabilizer, 0.05% of dispersant and the balance of water.
The suspension stabilizer is sodium bentonite, and the dispersant is sodium lignosulfonate.
The preparation method of the fly ash suspension stable plugging profile control agent comprises the following steps:
firstly, 62.45g of water is added into a container, then 2.5g of sodium bentonite is added under the stirring of 300r/min, the stirring time is 30min, the stirring is uniform, and the swelling is fully carried out, so as to form stable suspension; then adding 0.05g of sodium lignosulfonate into the prepared suspension liquid at the same stirring speed, and stirring for 5min to obtain a suspension dispersion liquid; and finally, adding 35g of fly ash into the prepared suspension dispersion liquid under the stirring at the same rotating speed, and continuously stirring for 10min to obtain the fly ash suspension stabilization plugging profile control agent. The fly ash suspension stable plugging profile control agent prepared according to the proportion is injected into the deep part of the stratum through profile control equipment.
Example 4 fly ash suspension stabilization plugging profile control agent
The fly ash suspension stable plugging profile control agent comprises the following components in percentage by mass: 30% of fly ash, 4.0% of suspension stabilizer, 0.25% of dispersant and the balance of water.
The suspension stabilizer is sodium bentonite, and the dispersant is sodium lignosulfonate.
The preparation method of the fly ash suspension stable plugging profile control agent comprises the following steps:
firstly, 65.75g of water is added into a container, then 4.0g of sodium bentonite is added under the stirring of 300r/min, the stirring time is 30min, the stirring is uniform, and the swelling is fully carried out, so as to form stable suspension; then adding 0.25g of sodium lignosulfonate into the prepared suspension liquid at the same stirring speed, and stirring for 5min to obtain a suspension dispersion liquid; and finally, adding 30g of fly ash into the prepared suspension dispersion liquid under the stirring at the same rotating speed, and continuously stirring for 10min to obtain the fly ash suspension stabilization plugging profile control agent. The fly ash suspension stable plugging profile control agent prepared according to the proportion is injected into the deep part of the stratum through profile control equipment.
Example 5 fly ash suspension stabilization plugging profile control agent
The fly ash suspension stable plugging profile control agent comprises the following components in percentage by mass: 25% of fly ash, 3.0% of suspension stabilizer, 0.3% of dispersant and the balance of water.
The suspension stabilizer is sodium bentonite, and the dispersant is sodium lignosulfonate.
The preparation method of the fly ash suspension stable plugging profile control agent comprises the following steps:
firstly, adding 71.7g of water into a container, then adding 3.0g of sodium bentonite under stirring at 300r/min for 30min, uniformly stirring, and fully swelling to form stable suspension; then adding 0.3g of sodium lignosulfonate into the prepared suspension liquid at the same stirring speed, and stirring for 5min to obtain a suspension dispersion liquid; and finally, adding 25g of fly ash into the prepared suspension dispersion liquid under the stirring at the same rotating speed, and continuously stirring for 10min to obtain the fly ash suspension stabilization plugging profile control agent. The fly ash suspension stable plugging profile control agent prepared according to the proportion is injected into the deep part of the stratum through profile control equipment.
Example 6 fly ash suspension stabilization plugging profile control agent
The fly ash suspension stable plugging profile control agent comprises the following components in percentage by mass: 20% of fly ash, 3.0% of suspension stabilizer, 0.3% of dispersant and the balance of water.
The suspension stabilizer is sodium bentonite, and the dispersant is sodium lignosulfonate.
The preparation method of the fly ash suspension stable plugging profile control agent comprises the following steps:
firstly, 76.7g of water is added into a container, then 3.0g of sodium bentonite is added under the stirring of 300r/min, the stirring time is 30min, the stirring is uniform, and the swelling is fully carried out, so as to form stable suspension; then adding 0.3g of sodium lignosulfonate into the prepared suspension liquid at the same stirring speed, and stirring for 5min to obtain a suspension dispersion liquid; and finally, adding 20g of fly ash into the prepared suspension dispersion liquid under the stirring at the same rotating speed, and continuously stirring for 10min to obtain the fly ash suspension stabilization plugging profile control agent. The fly ash suspension stable plugging profile control agent prepared according to the proportion is injected into the deep part of the stratum through profile control equipment.
Example 7 fly ash suspension stabilization plugging profile control agent
The fly ash suspension stable plugging profile control agent comprises the following components in percentage by mass: 15% of fly ash, 3.0% of suspension stabilizer, 0.3% of dispersant and the balance of water.
The suspension stabilizer is sodium bentonite, and the dispersant is sodium lignosulfonate.
The preparation method of the fly ash suspension stable plugging profile control agent comprises the following steps:
firstly, 81.7g of water is added into a container, then 3.0g of sodium bentonite is added under the stirring of 300r/min, the stirring time is 30min, the stirring is uniform, and the swelling is fully carried out, so as to form stable suspension; then adding 0.3g of sodium lignosulfonate into the prepared suspension liquid at the same stirring speed, and stirring for 5min to obtain a suspension dispersion liquid; and finally, adding 15g of fly ash into the prepared suspension dispersion liquid under the stirring at the same rotating speed, and continuously stirring for 10min to obtain the fly ash suspension stabilization plugging profile control agent. The fly ash suspension stable plugging profile control agent prepared according to the proportion is injected into the deep part of the stratum through profile control equipment.
Example 8 fly ash suspension stabilization plugging profile control agent
The fly ash suspension stable plugging profile control agent comprises the following components in percentage by mass: 15% of fly ash, 2.5% of suspension stabilizer, 0.5% of suspension stabilizer additive, 0.05% of dispersant and the balance of water.
The suspension stabilizer is sodium bentonite, the dispersant is sodium lignosulfonate, and the suspension stabilizer auxiliary agent is sodium carbonate.
The preparation method of the fly ash suspension stable plugging profile control agent comprises the following steps:
firstly, adding 81.95g of water into a container, then adding 2.5g of sodium bentonite and 0.5g of sodium carbonate under stirring at 300r/min, stirring for 30min, uniformly stirring, and fully swelling to form stable suspension; then adding 0.05g of sodium lignosulfonate into the prepared suspension liquid at the same stirring speed, and stirring for 5min to obtain a suspension dispersion liquid; and finally, adding 15g of fly ash into the prepared suspension dispersion liquid under the stirring at the same rotating speed, and continuously stirring for 10min to obtain the fly ash suspension stabilization plugging profile control agent. The fly ash suspension stable plugging profile control agent prepared according to the proportion is injected into the deep part of the stratum through profile control equipment.
Test examples
The plugging profile control agents prepared in the above examples 1 to 8 were tested for suspension stability and the following groups of plugging profile control agents were used as controls:
control group 1:
20g of fly ash and 80g of water.
Control group 2:
20g of fly ash, 3g of sodium bentonite and 77g of water.
Control group 3:
20g of fly ash, 15g of smectite, 3g of sodium bentonite and 62g of water.
The stability time and the water separation rate of each group of systems are examined, and the experimental results are shown in the following table 1.
TABLE 1 test results of settling time and water separation rate for different systems
As can be seen from Table 1, the plugging profile control agents prepared in examples 1-8 of the present invention have a long stability time and a low water separation rate. Wherein, after the mixed system of the example 6 and the comparison groups 1 and 2 is settled for 36 hours, the effect graph is shown as the attached figure 2. After standing for 36h, example 6 still maintained good suspension stability, and the mixed system had good fluidity.
The field application embodiment:
the average buried depth of a certain oil field area is 300 meters, the effective oil layer thickness is 7.1 meters, the oil layer temperature is 20 ℃, the crude oil viscosity is 27000-37000mPa.s, the porosity is 30-35 percent, and the permeability is 2545-3873 × 10-3um2. The main problems of the block are steam channeling, water content is increased after the steam channeling is interfered, yield is reduced, the problems of steam channeling and bottom water are increasingly severe along with the deepening of steam huff and puff development, and development effect is gradually reduced. In order to improve the steam injection effect, the fly ash suspension stable plugging profile control agent is determined to be used for profile control and channeling sealing. 500m of fly ash suspension stable plugging profile control agent prepared according to the proportion in example 6 is injected in 5 months in 20173The amount of the used fly ash reaches 100 tons.
After the measure well is plugged, the well is opened from 8 months in 2017, the production is carried out to 5 months in 2018, 4453.4 tons of accumulated liquid, 928.2 tons of accumulated oil and 72.18 percent of average water content are obtained, and the effect of water reduction and oil increase is obvious, which is shown in figure 3.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. A fly ash suspension stabilization plugging profile control agent is characterized in that fly ash is used as a main agent, and the content of the fly ash is 10 wt% -40 wt%.
2. The fly ash suspension stabilization plugging profile control agent according to claim 1, which is characterized by comprising the following components in percentage by mass: 10 to 40 percent of fly ash, 2.5 to 5.0 percent of suspension stabilizer, 0 to 2 percent of suspension stabilizer additive, 0.05 to 0.4 percent of dispersant and the balance of water.
3. The fly ash suspension stabilization plugging profile control agent according to claim 1, which is characterized by comprising the following components in percentage by mass: 10-35% of fly ash, 2.5-5.0% of suspension stabilizer, 0-2% of suspension stabilizer additive, 0.05-0.4% of dispersant and the balance of water;
preferably, the composition comprises the following components in percentage by mass: 10 to 30 percent of fly ash, 2.5 to 5.0 percent of suspension stabilizer, 0 to 2 percent of suspension stabilizer additive, 0.05 to 0.4 percent of dispersant and the balance of water;
preferably, the composition comprises the following components in percentage by mass: 10 to 25 percent of fly ash, 2.5 to 5.0 percent of suspension stabilizer, 0 to 2 percent of suspension stabilizer additive, 0.05 to 0.4 percent of dispersant and the balance of water;
preferably, the composition comprises the following components in percentage by mass: 15-25% of fly ash, 2.5-5.0% of suspension stabilizer, 0-2% of suspension stabilizer additive, 0.05-0.4% of dispersant and the balance of water;
preferably, the composition comprises the following components in percentage by mass: 20 to 25 percent of fly ash, 2.5 to 5.0 percent of suspension stabilizer, 0 to 2 percent of suspension stabilizer additive, 0.05 to 0.4 percent of dispersant and the balance of water.
4. A fly ash suspension stabilization plugging profile control agent according to any one of claims 1 to 3, wherein the fly ash does not need to be subjected to classification screening, and the particle size of the fly ash is in a range of 1 to 100 μm.
5. The fly ash suspension stabilization plugging profile control agent as claimed in any one of claims 1 to 3, wherein the suspension stabilizer is sodium bentonite or calcium bentonite.
6. A fly ash suspension stabilization plugging profile control agent according to any one of claims 1 to 3, wherein the viscosity-increasing adjuvant is sodium carbonate.
7. A fly ash suspension stabilization plugging profile control agent according to any one of claims 1 to 3, wherein the dispersant is lignosulfonate.
8. A method for preparing a fly ash suspension stabilization plugging profile control agent according to any one of claims 1 to 7, which is characterized by comprising the following steps:
adding a suspension stabilizer and a suspension stabilizer additive into water, and uniformly stirring to form a stable suspension; adding a dispersing agent into the suspension, and stirring for 5-15min to obtain a suspension dispersion liquid; and (3) stirring the fly ash suspension dispersion liquid for 5-15min to obtain the fly ash suspension dispersion liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910956368.8A CN112625665B (en) | 2019-10-08 | 2019-10-08 | Fly ash suspension stable plugging profile control agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910956368.8A CN112625665B (en) | 2019-10-08 | 2019-10-08 | Fly ash suspension stable plugging profile control agent and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112625665A true CN112625665A (en) | 2021-04-09 |
| CN112625665B CN112625665B (en) | 2023-04-18 |
Family
ID=75283304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910956368.8A Active CN112625665B (en) | 2019-10-08 | 2019-10-08 | Fly ash suspension stable plugging profile control agent and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112625665B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116200175A (en) * | 2021-11-30 | 2023-06-02 | 中国石油化工股份有限公司 | Inorganic gel for plugging water of carbonate reservoir and preparation method thereof |
| CN116396735A (en) * | 2023-06-06 | 2023-07-07 | 新疆能通能原石油工程有限公司 | Composite profile control agent and profile control blocking method for super-heavy oil well |
| CN116553905A (en) * | 2023-03-29 | 2023-08-08 | 中基怡合科技发展(北京)有限公司 | Stabilizer for Fuji production |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587637A (en) * | 2004-07-05 | 2005-03-02 | 卢祥国 | Use of modified flyash as profile control agent |
| CN101353571A (en) * | 2008-09-03 | 2009-01-28 | 中国石油新疆油田分公司采油工艺研究院 | Oil and water well slag plugging agent |
| CN104212422A (en) * | 2014-08-08 | 2014-12-17 | 左青山 | Heavy oil low cost modified clay-type water shutoff agent and usage method thereof |
| CN104371678A (en) * | 2014-11-06 | 2015-02-25 | 中国石油天然气集团公司 | Expanded flexible well cementing grout and preparation method thereof |
| CN105062447A (en) * | 2015-08-12 | 2015-11-18 | 中国石油化工股份有限公司 | Channeling sealing agent for thermal recovery and preparation method thereof |
| CN106967403A (en) * | 2017-04-24 | 2017-07-21 | 东北石油大学 | A kind of oilfield reservoir macropore or special high permeable strip sealing agent and preparation method thereof |
| CN107313758A (en) * | 2017-09-04 | 2017-11-03 | 中国石油化工股份有限公司华东油气分公司泰州采油厂 | A kind of transfer drive method for improving oil recovery rate |
-
2019
- 2019-10-08 CN CN201910956368.8A patent/CN112625665B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587637A (en) * | 2004-07-05 | 2005-03-02 | 卢祥国 | Use of modified flyash as profile control agent |
| CN101353571A (en) * | 2008-09-03 | 2009-01-28 | 中国石油新疆油田分公司采油工艺研究院 | Oil and water well slag plugging agent |
| CN104212422A (en) * | 2014-08-08 | 2014-12-17 | 左青山 | Heavy oil low cost modified clay-type water shutoff agent and usage method thereof |
| CN104371678A (en) * | 2014-11-06 | 2015-02-25 | 中国石油天然气集团公司 | Expanded flexible well cementing grout and preparation method thereof |
| CN105062447A (en) * | 2015-08-12 | 2015-11-18 | 中国石油化工股份有限公司 | Channeling sealing agent for thermal recovery and preparation method thereof |
| CN106967403A (en) * | 2017-04-24 | 2017-07-21 | 东北石油大学 | A kind of oilfield reservoir macropore or special high permeable strip sealing agent and preparation method thereof |
| CN107313758A (en) * | 2017-09-04 | 2017-11-03 | 中国石油化工股份有限公司华东油气分公司泰州采油厂 | A kind of transfer drive method for improving oil recovery rate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116200175A (en) * | 2021-11-30 | 2023-06-02 | 中国石油化工股份有限公司 | Inorganic gel for plugging water of carbonate reservoir and preparation method thereof |
| CN116553905A (en) * | 2023-03-29 | 2023-08-08 | 中基怡合科技发展(北京)有限公司 | Stabilizer for Fuji production |
| CN116396735A (en) * | 2023-06-06 | 2023-07-07 | 新疆能通能原石油工程有限公司 | Composite profile control agent and profile control blocking method for super-heavy oil well |
| CN116396735B (en) * | 2023-06-06 | 2023-09-05 | 新疆能通能原石油工程有限公司 | Composite profile control agent and profile control blocking method for super-heavy oil well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112625665B (en) | 2023-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112625665B (en) | Fly ash suspension stable plugging profile control agent and preparation method thereof | |
| CN107434378B (en) | Low-carbon environment-friendly waste asphalt mixture composite permeable mortar for sponge city and preparation method thereof | |
| CN102211916B (en) | Paste filling material composition prepared from drift-sand and industrial solid waste | |
| CN110862246A (en) | Elastic and flexible resin cement slurry for well cementation and preparation method thereof | |
| CN113333436A (en) | All-component comprehensive utilization method of coal gasification fine slag | |
| CN105368421A (en) | Non-resin type profile control agent and application thereof in petroleum exploitation process | |
| CN103074045B (en) | Anti-gas channeling toughening cement slurry for well cementation of small-gap annular horizontal well | |
| CN111875312A (en) | Fluid state reclaimed material and preparation process thereof | |
| CN104724968B (en) | The plastic expansion agent and preparation method thereof of upper flow regime cement-based gelling material anti-settling | |
| CN104291733A (en) | Toughened anti-channeling agent for cement and toughened cement for cementing shale gas horizontal well | |
| CN102994057B (en) | A kind of temperature-resistant anti-salt profile control agent and preparation method thereof | |
| CN113105877A (en) | Modified natural cellulose fiber, preparation method thereof and water invasion resistant well cementation cement slurry | |
| CN104787993A (en) | Oil sludge sand three-phase separation treatment method | |
| WO2023231618A1 (en) | Method for harmless utilization of oil shale residue and retorted drilling oil residue | |
| CN105110674A (en) | Bonding agent, stemming including bonding agent and preparation method of stemming | |
| CN104278610B (en) | A kind of take dregs as road pavements of primary raw material and preparation method thereof | |
| CN109704684B (en) | Retarding type water-dispersion-resistant grouting material for implanted rock-socketed single pile | |
| CN112592131A (en) | Ultrathin layer masonry mortar special for sintered blocks prepared from recycled fine powder containing red bricks | |
| US11834373B2 (en) | Oil shale semicoke adsorption inhibitor and application thereof in concrete preparation | |
| CN107902990A (en) | A kind of method that Polymer cement materials are prepared using quartz sand dust | |
| CN111100651A (en) | Oil-gas field water-based drilling rock debris soil improvement agent and soil improvement method, and improved soil | |
| CN104404849B (en) | A kind of lime stabilization clay reclaims powder compound | |
| CN104278609A (en) | Road pavement material prepared by compounding residue soil and steel slag and method for preparing road pavement material | |
| CN113651506A (en) | Method for solidifying infiltration filtrate sludge in new garbage landfill process | |
| CN112980411A (en) | Selective long-acting plugging agent for oil field and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |