CN104388075A - Gelatinizing agent for acidification of high temperature carbonatite and preparing method of gelatinizing agent - Google Patents
Gelatinizing agent for acidification of high temperature carbonatite and preparing method of gelatinizing agent Download PDFInfo
- Publication number
- CN104388075A CN104388075A CN201410581521.0A CN201410581521A CN104388075A CN 104388075 A CN104388075 A CN 104388075A CN 201410581521 A CN201410581521 A CN 201410581521A CN 104388075 A CN104388075 A CN 104388075A
- Authority
- CN
- China
- Prior art keywords
- high temperature
- initiator
- jelling agent
- carbonate rock
- gelatinizing 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
- C09K8/78—Eroding chemicals, e.g. acids combined with additives added for specific purposes for preventing sealing
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F4/00—Polymerisation catalysts
- C08F4/40—Redox systems
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention discloses a gelatinizing agent for acidification of high temperature carbonatite and a preparing method of the gelatinizing agent. The gelatinizing agent is a positive ion acid liquor gelatinizing agent formed by the copolymerization and synthesis of two monomers of DMC and AM before being initiated by an initiator, the gelatinizing agent is small in dosage, simple in preparation, low in cost, stable in performance and good in acid liquor compatibility, can effectively improve the flow conductivity of acid etched cracks and prolong the penetration distance of acid, reduces secondary damage, realizes deepened acidification in acidification construction, meets the construction requirement for acidification of high temperature carbonatite, and besides, the preparing method of the gelatinizing agent for acidification of high temperature carbonatite is simple and feasible and can be used for effectively synthesizing the gelatinizing agent.
Description
Technical field
The invention belongs to high temperature carbonate rock Acidizing Technology field, jelling agent of particularly a kind of high temperature carbonate rock acidifying and preparation method thereof.
Background technology
Conventional acid solution is in acidizing treatment, and acid-rock reaction speed is fast, and EFFECTIVE RANGE is short, and penetration depth is limited, causes acid solution can not link up well area far away, well stimulation deleterious.In order to improve acidizing effect, most effective means is in acid solution, add jelling agent, controls hydrionic velocity of diffusion, dissolves gradually to rock and clay mineral etc. thereof, enhance acid solution penetrating power in the earth formation, thus realize the deep acidification on stratum.
Acid liquor gellant mainly contains acrylamide copolymer, polysaccharide polymer, high-molecular biologic polymkeric substance and polyvinyls etc. both at home and abroad at present.At home and abroad in proof acid liquor gellant, much guanidine glue, derivatived cellulose, high-molecular biologic polymkeric substance, polyvinyls, due to the restriction of its molecular structure, only have when well temperature lower than 70 DEG C, concentration lower than 20% time, thickening effectiveness is better, otherwise degradation, also can damage hydrocarbon zone.Therefore, existing one-phase is to acrylamide copolymer product development and apply at most, and this base polymer can be applied and have temperature resistance, anti-shearing character in the hydrochloric acid of high temperature (70 DEG C ~ 180 DEG C), mud acid.But there is the general comparatively cationic monomer price of anionic monomer of temperature resistance, anti-shearing character, and the high-valence cationic in stratum is easily combined with anionic gelling agents, formation insoluble precipitate, also can choked flow circulation passage, cause reservoir damage.
Summary of the invention
The object of the present invention is to provide a kind of high temperature carbonate rock acidifying jelling agent, this jelling agent consumption is prepared simply less, cost is low, stable performance, good with acid solution compatibleness, effectively can improve the flow conductivity of acid-etched fracture and the penetration range of acid, alleviate secondary injury, the object of deep acidizing in acidizing treatment, can meet the construction requirement of high temperature carbonate rock acidifying
Present invention also offers the preparation method of the jelling agent of a kind of high temperature carbonate rock acidifying, the method can simple and easy to do and synthetic gelling agents efficiently.
To achieve these goals, technical solution of the present invention is as follows:
A jelling agent for high temperature carbonate rock acidifying, is prepared from by the component of following weight percent:
MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride 14% ~ 25%
Acrylamide 11.2% ~ 20%
Initiator 0.04% ~ 0.1%
Surplus is water;
The weight ratio of described MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and described acrylamide is 5:4
Described initiator is redox system initiator.
The jelling agent of the high temperature carbonate rock acidifying of above-mentioned preparation is raw materials used, comprises acrylamide (AM) and MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride (DMC) two kinds of monomers.Compared with prior art, the two kinds of monomer costs preparing the jelling agent of described high temperature carbonate rock acidifying are low, and the described jelling agent method of preparation is simple to operation.
Relevant monomer structure is as follows:
Wherein:
In the deterministic process of described two kinds of monomer polymerization ratios, contriver have chosen acrylamide (AM) and carries out copolymerization with MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride (DMC) with the multiple mass ratio such as 3:2,5:4,1:1, in obtained various polymkeric substance, when quality slightly larger than AM of the quality of DMC, the jelling agent viscosity performance that copolymerization obtains is best, all can reach the viscosity number that construction needs after shearing at different temperatures.And when the mass ratio of DMC and AM is 5:4, the jelling agent performance that copolymerization obtains is best, for participating in the monomer optimum proportioning of copolyreaction.
Through contriver's lot of experiment validation, when initiated polymerization, preferably, described redox system initiator is K
2s
2o
8-NaHSO
3and as K in described initiator
2s
2o
8with NaHSO
3mol ratio when being 1:1.2, the polymer performance that initiated polymerization obtains is best.
In addition, the jelling agent of this high temperature carbonate rock acidifying, in preparation process, needs in a lot of documents unlike report to regulate pH value in the course of the polymerization process, and in the preparation of this jelling agent, acid, the alkalescence of solution there is no impact to its performance.
A preparation method for the jelling agent of high temperature carbonate rock acidifying, comprises the steps:
(1) described MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride is added in the reactor;
(2) described acrylamide is dissolved in after in water and joins in described reactor again, stir, obtain monomer mixture solution;
(3) in described mixing solutions, pass into nitrogen 15-20min deoxygenation and constantly stir this mixing solutions, giving its heat temperature raising simultaneously;
(4) be added drop-wise to after described initiator being dissolved in water in described mixing solutions, continue stir and continue to pass into nitrogen in dropping process;
(5) continue heat up to mixing solutions and keep temperature of reaction to be 45 ~ 55 DEG C, after reaction 4 ~ 5h, stopped reaction, obtains colloidalmaterial;
(6) the described colloidalmaterial obtained is dried 10h, granulation at 60 DEG C of temperature, obtain powdered gellant.
Preferably, in step (4), described initiator after dissolving in water the rate of addition be added drop-wise in described mixing solutions control to drip at per minute 18-22.
Preferably, in step (6), the powdered gellant that granulation obtains is carried out to the colloidalmaterial after drying, 30 orders are not more than to the gelling agent powder granularity granularity that its granularity requirements is massfraction more than 95%.
Owing to occurring in two kinds of monomers of polymerization, acrylamide is solid, and MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride is the liquid containing aqueous solvent, therefore, after being mixed to get monomer mixture solution with MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride again after first being dissolved in water by acrylamide before the reaction, add the positively charged ion acid liquor gellant that initiator causes copolymerization.
Compared with prior art, the jelling agent of this high temperature carbonate rock acidifying is soluble in acid, high temperature resistant, resistant to shearing under 150 DEG C of temperature condition, low and the environmental protection of cost, effectively can improve the flow conductivity of acid-etched fracture and the penetration range of acid, reach the object of deep acidizing.
Embodiment
Below in conjunction with embodiment, foregoing invention content of the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment.Without departing from the idea case in the present invention described above, according to ordinary skill knowledge and customary means, make various replacement and change, all should comprise within the scope of the invention.
Embodiment 1
In reactor, add the DMC of 14g, the AM of 11.2g be dissolved in 55mL water, after add in reaction vessel, stir, obtain monomer mixture solution; Heat up monomer mixture solution logical N simultaneously
2stir 15 minutes except O
2; By 0.1g initiator (K
2s
2o
8-NaHSO
3) be slowly added drop-wise in monomer mixture solution after dissolving in 20mL water, continue to pass into N in dropping process
2, stopped reaction after constant temperature 55 DEG C of water-bath 4h, obtains colloidalmaterial; Gained colloidalmaterial is dried 10h at 60 DEG C of temperature, granulation, obtain gelling agent powder.
Embodiment 2
In reactor, add the DMC of 18g, the AM of 14.4g be dissolved in 47.5mL water, after add in reaction vessel, stir, obtain monomer mixture solution; Heat up monomer mixture solution logical N simultaneously
2stir 18 minutes except O
2; By 0.08g initiator (K
2s
2o
8-NaHSO
3) be slowly added drop-wise in monomer mixture solution after dissolving in 20mL water, continue to pass into N in dropping process
2, stopped reaction after constant temperature 50 DEG C of water-bath 5h, obtains colloidalmaterial; Gained colloidalmaterial is dried 10h at 60 DEG C of temperature, granulation, obtain gelling agent powder.
Embodiment 3
In reactor, add the DMC of 22g, the AM of 17.6g be dissolved in 45mL water, after add in reaction vessel, stir, obtain monomer mixture solution; Heat up monomer mixture solution logical N simultaneously
2stir 18 minutes except O
2; By 0.06g initiator (K
2s
2o
8-NaHSO
3) be slowly added drop-wise in monomer mixture solution after dissolving in 15mL water, continue to pass into N in dropping process
2, stopped reaction after constant temperature 50 DEG C of water-bath 4.5h, obtains colloidalmaterial; Gained colloidalmaterial is dried 10h at 60 DEG C of temperature, granulation, obtain gelling agent powder.
Embodiment 4
In reactor, add the DMC of 25g, the AM of 20g be dissolved in 40mL water, after add in reaction vessel, stir, obtain monomer mixture solution; Heat up monomer mixture solution logical N simultaneously
2stir 20 minutes except O
2; By 0.04g initiator (K
2s
2o
8-NaHSO
3) be slowly added drop-wise in monomer mixture solution after dissolving in 15mL water, continue to pass into N in dropping process
2, stopped reaction after constant temperature 45 DEG C of water-bath 4.5h, obtains colloidalmaterial; Gained colloidalmaterial is dried 10h at 60 DEG C of temperature, granulation, obtain gelling agent powder.
Performance evaluation:
At present, to the evaluation of the jelling agent of high temperature carbonate rock acidifying, be mainly dissolved in the time of acid solution from jelling agent, the glutinous effect of increasing and rheological property three aspects are evaluated.Therefore, according to SY/T6214-1996 " gelling agent for acid fluid evaluation method ", performance evaluation is carried out to the jelling agent prepared in above-described embodiment.
Prepare acid solution according to standard Q/SYBHZ0974-2013BZ acidifying jelling agent: take 0.8g jelling agent, being dissolved in 100mL massfraction is in the hydrochloric acid soln of 20wt%, and configuration is in 0.8wt% gelifying agent hydrochloric acid soln.Wherein, 100mL hydrochloric acid soln is mixed by 54mL36.5wt% hydrochloric acid and 46mL distilled water.
(1) acid-soluble Time evaluation
The acid-soluble time refers to the time that dissolve gelling agents is used in 20wt% hydrochloric acid soln.
The dissolution time that the dissolve gelling agents of the high temperature carbonate rock acidifying prepared by embodiment 1 ~ 4 is required in 20wt% hydrochloric acid soln is shown in Table 1:
In each embodiment of table 1, gelifying agent is dissolved in time used in 20wt% hydrochloric acid soln and standard acid-soluble time
Can be drawn by table 1, the dissolve gelling agents of the high temperature carbonate rock acidifying prepared by embodiment 1 ~ 4 dissolution time in 20wt% hydrochloric acid soln is between 22-27min, all be less than the standard acid-soluble time, the dissolve gelling agents speed of this high temperature carbonate rock acidifying visible is fast, there is good solubility energy, meet the requirement of site operation completely.
In addition, the jelling agent acid solution solution of configuration is transparent, does not have impurity and suspended substance, not stratified, and jelling agent and the acid solution compatibleness of this high temperature carbonate rock acidifying are as seen good.
(2) glutinous effect assessment is increased
At room temperature, the jelling agent acid solution of the 0.8wt% configured is adopted 170s
-1shearing rate, after abundant swelling 30min, at room temperature use six fast rotational viscosimeter tested viscosity.
The jelling agent of the high temperature carbonate rock acidifying prepared by embodiment 1 ~ 4 is after aforesaid method is swelling, and the viscosity at ambient temperature value of survey is as shown in table 2:
Gelifying agent hydrochloric acid soln viscosity number in each embodiment of table 2
Can be drawn by table 2, the jelling agent acid solution of the high temperature carbonate rock acidifying prepared by embodiment 1 ~ 4 is at 170s
-1down cut, after abundant swelling 30min, viscosity at ambient temperature is between 33-39mPas, and be all greater than room temperature normal viscosity value, acid solution Efficient Adhesive Promotion is good, meets site operation requirement.
(3) rheological property evaluation
By the 0.8wt% jelling agent acid solution that configures under 150 DEG C of conditions, adopt 170s
-1shearing rate, shear after 60min, test its viscosity with six fast rotational viscosimeters.
The jelling agent of the high temperature carbonate rock acidifying prepared by embodiment 1 ~ 4 is after aforesaid method is swelling, and the viscosity at ambient temperature value of survey is as shown in table 3:
Gelifying agent hydrochloric acid soln 150 DEG C of high temperature 170s in each embodiment of table 3
-1viscosity number after shearing 60min
Can be drawn by table 3, the jelling agent acid solution of the high temperature carbonate rock acidifying prepared by embodiment 1 ~ 4 is at 150 DEG C of high temperature 170s
-1shear after 60min, viscosity, between 12.8-17.5mPas, is within the scope of normal viscosity, is conducive to residual acid and returns and be discharged to ground.Reflection residue villain can not be unfavorable for because viscosity is too small.Therefore, under 150 DEG C of constant temperatures, gel acid still can keep certain viscosity, has excellent acidproof, heat resistance.
In addition, in actual acidizing treatment process, the non-homogeneous etching on the acid solution fracture surface that the configuration of the jelling agent of this high temperature carbonate rock acidifying is formed makes crack have certain flow conductivity, can not cause crack closure after termination of pumping.
Claims (6)
1. a high temperature carbonate rock acidifying jelling agent, is characterized in that, is prepared from by the component of following weight percent:
MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride 14% ~ 25%
Acrylamide 11.2% ~ 20%
Initiator 0.04% ~ 0.1%
Surplus is water;
And the weight ratio of described MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and acrylamide for initiator described in 5:4 be redox system initiator.
2. high temperature carbonate rock acidifying jelling agent according to claim 1, it is characterized in that, described redox system initiator is K
2s
2o
8-NaHSO
3.
3. high temperature carbonate rock acidifying jelling agent according to claim 2, is characterized in that, K in described initiator
2s
2o
8with NaHSO
3mol ratio be 1:1.2.
4. a preparation method for the jelling agent of high temperature carbonate rock acidifying described in claim 1, is characterized in that, comprise the steps:
(1) described MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride is added in the reactor;
(2) described acrylamide is dissolved in after in water and joins in described reactor again, stir, obtain monomer mixture solution;
(3) in described mixing solutions, pass into nitrogen 15-20min deoxygenation and constantly stir this mixing solutions, giving its heat temperature raising simultaneously;
(4) be added drop-wise to after described initiator being dissolved in water in described mixing solutions, continue stir and continue to pass into nitrogen in dropping process;
(5) continue heat up to mixing solutions and keep temperature of reaction to be 45 ~ 55 DEG C, after reaction 4 ~ 5h, stopped reaction, obtains colloidalmaterial;
(6) the described colloidalmaterial obtained is dried 10h, granulation at 60 DEG C of temperature, obtain powdered gellant.
5. the jelling agent of high temperature carbonate rock acidifying according to claim 4, is characterized in that, initiator described in described step (4) after dissolving in water the rate of addition be added drop-wise in described mixing solutions be that per minute 18-22 drips.
6. the jelling agent of high temperature carbonate rock acidifying according to claim 4, is characterized in that, powder size≤30 order of more than 95wt% in described powder jelling agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410581521.0A CN104388075A (en) | 2014-10-27 | 2014-10-27 | Gelatinizing agent for acidification of high temperature carbonatite and preparing method of gelatinizing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410581521.0A CN104388075A (en) | 2014-10-27 | 2014-10-27 | Gelatinizing agent for acidification of high temperature carbonatite and preparing method of gelatinizing agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104388075A true CN104388075A (en) | 2015-03-04 |
Family
ID=52606039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410581521.0A Pending CN104388075A (en) | 2014-10-27 | 2014-10-27 | Gelatinizing agent for acidification of high temperature carbonatite and preparing method of gelatinizing agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104388075A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485787A (en) * | 2018-11-21 | 2019-03-19 | 山东科瑞油田服务集团股份有限公司 | A kind of preparation method of lotion acidification gelling agent |
| CN116731250A (en) * | 2023-06-16 | 2023-09-12 | 广汉市华星新技术开发研究所（普通合伙） | Preparation method of high-temperature-resistant acid liquid gelatinizing agent |
| CN116925721A (en) * | 2022-03-30 | 2023-10-24 | 中国石油天然气股份有限公司 | Clastic rock reservoir reconstruction liquid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2163790B (en) * | 1984-08-28 | 1988-02-24 | Dow Chemical Co | Methods for acidizing subterranean formations and gelled acid compositions |
| CN101857658A (en) * | 2009-04-09 | 2010-10-13 | 北京佛瑞克技术发展有限公司 | Copolymer for acid fracturing retarded gel acid and preparation method thereof |
| CN102115514A (en) * | 2010-10-19 | 2011-07-06 | 乌鲁木齐市科发展精细化工有限公司 | Preparation method of acid liquor thickening agent |
-
2014
- 2014-10-27 CN CN201410581521.0A patent/CN104388075A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2163790B (en) * | 1984-08-28 | 1988-02-24 | Dow Chemical Co | Methods for acidizing subterranean formations and gelled acid compositions |
| CN101857658A (en) * | 2009-04-09 | 2010-10-13 | 北京佛瑞克技术发展有限公司 | Copolymer for acid fracturing retarded gel acid and preparation method thereof |
| CN102115514A (en) * | 2010-10-19 | 2011-07-06 | 乌鲁木齐市科发展精细化工有限公司 | Preparation method of acid liquor thickening agent |
Non-Patent Citations (5)
| Title |
|---|
| 胡忠前等: "一种新型酸液胶凝剂的合成与性能评价", 《钻井液与完井液》 * |
| 陈日悦: "新型抗温抗盐稠化剂的合成", 《化学工程师》 * |
| 韩明俊等: "高分子量P(DMC-AM)实验室研究", 《内蒙古石油化工》 * |
| 龚蔚等: "阳离子型酸液胶凝剂P(DMC-AM)的合成及性质研究", 《石油天然气学报》 * |
| 龚蔚等: "高温高黏胶凝酸PDA合成及性能评价", 《钻采工艺》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485787A (en) * | 2018-11-21 | 2019-03-19 | 山东科瑞油田服务集团股份有限公司 | A kind of preparation method of lotion acidification gelling agent |
| CN116925721A (en) * | 2022-03-30 | 2023-10-24 | 中国石油天然气股份有限公司 | Clastic rock reservoir reconstruction liquid |
| CN116731250A (en) * | 2023-06-16 | 2023-09-12 | 广汉市华星新技术开发研究所（普通合伙） | Preparation method of high-temperature-resistant acid liquid gelatinizing agent |
| CN116731250B (en) * | 2023-06-16 | 2024-03-05 | 广汉市华星新技术开发研究所（普通合伙） | Preparation method of high-temperature-resistant acid liquid gelatinizing agent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101121880B (en) | Natural macromolecule modified starch profile control agent for oil field | |
| CN102838781B (en) | Ultra-temperature organic zirconium crosslinker suitable for polymer crosslinking and prepared fracturing solutions of ultra-temperature organic zirconium crosslinker | |
| CN100363394C (en) | Water soluble amphoteric ion copolymer and preparation process thereof | |
| CN102604623B (en) | AM/NaAA/NAC water-soluble polymer oil-displacement agent and synthesizing method thereof | |
| CN102352232B (en) | Temperature-resistant and salt-resistant polymer clean fracturing fluid thickening agent and preparation method thereof | |
| CN101412906A (en) | Acid fracturing thickening agent and preparation thereof | |
| CN104861110B (en) | Thief zone heavy crude reservoir is prevented swollen pressing down sand agent and preparation method thereof | |
| CN104479653A (en) | Retarding-swelling salt-tolerant high-viscoelasticity particles with interpenetrating network structure and preparation method thereof | |
| CN104497220A (en) | Starlike anti-shearing polyacrylamide for fracturing fluid and preparation method of starlike anti-shearing polyacrylamide | |
| CN105199706A (en) | Organic zirconium crosslinking agent applicable to polymer fracturing fluid system and preparation method of organic zirconium crosslinking agent | |
| CN101775275A (en) | Novel viscoelastic particle oil displacement agent and preparation method thereof | |
| CN107793529A (en) | A kind of high temperature resistant acid fracturing polymer and preparation method | |
| CN103254886A (en) | Supermolecule multiple association cleaning fracturing fluid and preparation method thereof | |
| CN104388075A (en) | Gelatinizing agent for acidification of high temperature carbonatite and preparing method of gelatinizing agent | |
| CN104311733A (en) | Viscosity-maintaining polymer and preparation method thereof | |
| CN105399897B (en) | Temperature-tolerant anti-salt polyacrylamide is birdsed of the same feather flock together compound and preparation method thereof | |
| CN103265939A (en) | Fracturing fluid thickening agent and preparation and application thereof | |
| CN105601804A (en) | Hydrophobic associated polymer and preparation method thereof | |
| CN105601805A (en) | Hydrophobic associated polymer and preparation method thereof | |
| CN107974246A (en) | A kind of high temperature resistant crosslinking acid system, preparation method and application | |
| CN103525393A (en) | Instant-type acid solution thickening agent, preparation method therefor and applications thereof | |
| CN112851856A (en) | Salt-tolerant polymer microsphere plugging agent and preparation method thereof | |
| CN105860951A (en) | Acidic polymer fracturing fluid and preparation method thereof | |
| CN106047333A (en) | High-temperature-resistant gelling agent in acid liquid and method for preparing high-temperature-resistant gelling agent | |
| CN105131921B (en) | A kind of salt-resisting high-temperature-resisting high intensity crosslinked gel plugging aqua |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150304 |
|
| RJ01 | Rejection of invention patent application after publication |