CN100355854C - Dispersion dehydration-reducing agent for oil field well cementation and its preparing method - Google Patents
Dispersion dehydration-reducing agent for oil field well cementation and its preparing method Download PDFInfo
- Publication number
- CN100355854C CN100355854C CNB2005101190057A CN200510119005A CN100355854C CN 100355854 C CN100355854 C CN 100355854C CN B2005101190057 A CNB2005101190057 A CN B2005101190057A CN 200510119005 A CN200510119005 A CN 200510119005A CN 100355854 C CN100355854 C CN 100355854C
- Authority
- CN
- China
- Prior art keywords
- filtrate reducer
- well
- grams
- polyvinyl alcohol
- dispersive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The present invention relates to a dispersive filtrate reducer for well cementation of oilfileds and a preparation method thereof, and belongs to the chemical industry class. The dispersive filtrate reducer is prepared from crosslinked polyvinyl alcohol high molecular polymer, a dispersing agent and a regulating agent according to certain proportion under the control of certain temperature and certain time. The dispersive filtrate reducer has good flowing performance of cement slurry, dehydration reduction function with high efficiency, and low free water. The preparation method is simple, and is easy to control, and the filtrate reducer is easy to industrially produce. The filtrate reducer of the present invention is added in well cementing field, and one filtrate reducer with multipurpose effect can be achieved. The safety is high, the well cementing requirements of different cement and different well conditions can be satisfied, and the well cementing cost can be greatly reduced.
Description
Technical field
The present invention relates to the production method of applied admixture in oil drilling, the well cementing operation, refer to water retaining of a kind of reinforcing oil well decentralized and preparation method thereof especially.
Background technology
As everyone knows, along with the development of petroleum industry, the increase of middle-deep well, horizontal well is very fast, the bottom temperature height, and the conditions down-hole complexity makes the difficulty of well cementation work increasing, and well shaft fixing technology is proposed higher requirement; Thereby also to the also corresponding raising of requirement of the admixture of oil well cement; At present, reinforcing oil well is exactly that grout is injected annular space between the borehole wall and the sleeve pipe, reach packing subterranean oil, gas, water layer, support the purpose of protective casing: because geological complex structure, conditions down-hole is abominable, and grout is under the effect of pressure during well cementation, aqueous phase separation comes out to produce the filtrate dehydration in the grout, filtrate is infiltrated the reactant aqueous solution of stratum and payzone, generates precipitation and the contaminated oil gas-bearing formation, has reduced the recovery ratio of oil gas; Because the high dehydration of grout makes grout become very thick, the pumping difficulty influences displacement efficiency, particularly at most permeable zone, causes easily that also bridge blinding causes construction accident; In addition, dehydration also is the one of the main reasons that causes has channeling, owing to form bridge blinding at annular space, causes grout weightlessness again, from and oil supply gas scurry favourable condition be provided; Therefore, for safety and the raising cementing quality that guarantees cementing operation, just must add well cementation uses water retaining to reduce the leak-off effect of pervious course to grout, the protection hydrocarbon zone improves recovery ratio: current, the water retaining that uses is more both at home and abroad, as cellulose family, polyamide-based, sulfonated polymer, polyvinyl alcohol etc., wherein fiber-like is the cement-formation filtration control agent of using always, and price is low, and it is higher to fall the dehydration ability, but this class water retaining has viscosifying action, can delay the grout setting time simultaneously, and when use temperature surpassed 90 ℃, fall the dehydration ability and obviously descend: polyamide-based also was the water retaining of excellent property, but the price height can not be promoted; The polyvinyl alcohol water retaining is compared with above-mentioned water retaining, it is low to have price, control dehydration ability is strong, intensity and thickening time to grout have no adverse effects, therefore be widely used, yet owing in grout, add the rheological variation that crosslinked polyvinyl alcohol water retaining can make grout separately, the slurry thickening, influence pumping, need the shortcoming of existence more than composite dispersion agent could be eliminated in grout,, reduce the internal friction resistance because the adding of dispersion agent can weaken and break the agglomerating connection between the cement granules, improve the rheological of grout to a certain extent, reduced denseness; But, if the dosage of dispersion agent is inappropriate, excessively dispersion can destroy the microtexture of being set up by identical electrostatic interaction, and easily produce the side effect that cement granules sedimentation or free water are increased, in addition, crosslinked polyvinyl alcohol directly contacts with dispersion agent, can produce gel, semi-solid phenomenon, dispensing site needs two kinds of medicines are prepared respectively, therefore very bothers, and suddenly requires further improvement.
Summary of the invention
The object of the present invention is to provide water retaining of a kind of reinforcing oil well decentralized and preparation method thereof, solved that the denseness that existing water retaining exists is big when oil drilling, cementing operation, troublesome poeration, security is low, side effect is big, and problems such as requirement that the control of free water do not reached always big gradient and horizontal cementing.
Technical scheme of the present invention is to add dispersion agent and conditioning agent in cross-linking polyvinyl alcohol family macromolecule polymkeric substance, and its weight ratio is: the polyethylene kind high molecular polymer is 70%～85%; Dispersion agent is 14%28%; Conditioning agent is 1%～2%:
Water retaining by above-mentioned formulation, when constructing at the scene, only add this water retaining and just can reach the well cementation requirement, simplified the on-the-spot technology of making up a prescription greatly, after particularly in crosslinked polyvinyl alcohol, dissolving in the dispersion agent of a certain proportion of formaldehyde one acetone polycondensate, not only improved the rheological of cement slurry effectively, and an amount of formic acid and the formaldehyde-acetone polycondensate of adding makes their that secondary crosslinking effect take place in crosslinked polyvinyl alcohol, make the spatial grid structure of formation tightr, the constraint effect of functional group is slowed down the cement granules settling velocity, and the free water of cement is significantly reduced; This can't realize with other blending meanss, under the synergy of dispersion agent and water retaining, can further improve cement filter cake quality, helps controlling dehydration and reduces free water; Because dispersion agent has obviously improved water mudrock microcosmos structure, and ultimate compression strength is improved greatly, and remedied single deficiency, made the present invention have good filtrate-loss control energy with water retaining; Slurry flowing performance-changing reaches low free water preferably:
Preparation method of the present invention:
Cross-linking polyvinyl alcohol family macromolecule polymkeric substance is dropped in the reaction flask by proportioning, heat 40～80 ℃, and stir; After treating homo(io)thermism, will join by the conditioning agent of proportioning in the reaction flask again, react 30～60 minutes; And then dispersion agent dropped into 40～70 ℃ of another vessel in heating by proportioning, treat homo(io)thermism after, the dispersion agent of heating is slowly joined in the reaction flask, reacted 60～120 minutes, promptly get the finished product for preparing.
The invention has the advantages that:
1, use this preparation method, can with crosslinked polyvinyl alcohol and dispersion agent organically molten be one, the semi-solid state that gel becomes bulk can not appear, liquid evenly, stable, good fluidity, place 1 year performance and still do not change;
2, in crosslinked polyvinyl alcohol, add an amount of formic acid and acetone-formaldehyde sulphur polycondensate, reaction at a certain temperature, make the secondary crosslinking effect takes place between them, formed like this spatial grid structure is tightr, the constraint effect of functional group is stronger, the cement granules settling velocity is slowed down, and free water significantly reduces, for gas well, long horizontal traverse well well cementation particularly suitable;
3, prepared decentralized water retaining, add in the cement, cement consistency is little, slurry stability good, has to fall the dehydration effect efficiently, lower free water and good mobility, Applicable temperature scope wide (20～120 ℃) and dissimilar oil well cements;
4, because prepared decentralized water retaining has the multiple function of falling dehydration, disperse and falling free water concurrently, therefore simplified the kind that on-the-spot well cementation admixture makes up a prescription, avoided the side effect between each similar drug, greatly reduce the well cementation cost.
Embodiment:
Embodiment 1:
Get raw material according to proportioning:
Crosslinked polyvinyl alcohol 700 grams, concentration is 8%, degree of crosslinking 0.071%: conditioning agent is got formic acid 10 grams: dispersion agent is got formaldehyde-acetone polycondensate 175 grams, and concentration is 36%:
The cross-linking polyvinyl alcohols of 700 grams are put into 50 ℃ of the condensers that have electric mixer, 60mm, 100 ℃ of thermometers, the four-hole bottle of 2000ml, heating: add conditioning agent 10 gram formic acid reactions 40 minutes again; Again dispersion agent formaldehyde-acetone polycondensate 175 grams are put into another bottle and be heated to 55 ℃, slowly join in the four-hole bottle, 50 minutes joining days, restir is 40 minutes under this temperature, and discharging gets finished product, and 1 year its effect of this products storage is constant.
Embodiment 2:
Get raw material according to proportioning:
Crosslinked polyvinyl alcohol 800 grams, concentration is 8%, degree of crosslinking 0.071%; Conditioning agent is got formic acid 12.5 grams; Dispersion agent is got formaldehyde-acetone polycondensate 133 grams, and concentration is 36%;
The cross-linking polyvinyl alcohols of 800 grams are put into 70 ℃ of the condensers that have electric mixer, 60mm, 100 ℃ of thermometers, the four-hole bottle of 2000ml, heating: add 12.5 gram formic acid reactions 60 minutes again; Again dispersion agent formaldehyde-acetone polycondensate 133 grams are put into another bottle and be heated to 55 ℃, slowly join in the four-hole bottle, 40 minutes joining days, restir is 50 minutes under this temperature, and discharging gets finished product, and 1 year its effect of this products storage is constant.
Embodiment 3:
Get raw material according to proportioning:
Crosslinked polyvinyl alcohol 820 grams, concentration is 6%, degree of crosslinking 0.12%; Conditioning agent is got formic acid 18 grams; Dispersion agent is got formaldehyde-acetone polycondensate 164 grams, and concentration is 36%;
The cross-linking polyvinyl alcohols of 820 grams are put into 60 ℃ of the condensers that have electric mixer, 60mm, 100 ℃ of thermometers, the four-hole bottle of 2000ml, heating; Add conditioning agent 18 gram formic acid reactions 70 minutes again; Again dispersion agent formaldehyde-acetone polycondensate 164 grams are put into another bottle and be heated to 40 ℃, slowly join in the four-hole bottle, 40 minutes joining days, restir is 50 minutes under this temperature, and discharging gets finished product, and 1 year its effect of this products storage is constant.
Embodiment 4:
Present embodiment is that the water retaining that embodiment 1 is prepared from is mixed with 600 gram solution by different dosage 56 grams, 64 grams, 72 grams, 80 grams, 88 grams with water, add Dalian G class g cement 800 grams, light-weight additive floats pearl 200 grams, in stablizer 40 grams, pressing API standard (APISpec10A, 1986) preparation proportion is 1.43g/cm
3Grout;
Method evaluation fluid loss by the oil and gas industry standard SY/T5546-92 of People's Republic of China (PRC) regulation: press the method evaluation rheological property of SY/T5546-92 regulation, the results are shown in following table 1:
| Sample dosage (gram) | Test temperature | The rotational viscosimeter reading | The API dehydration | Free water | n | K Pa.S n | |||||
| 56 | 60 | 144 | 85 | 66 | 44 | 17 | 12 | 27 | 0.0 | 0.76 | 0.379 |
| 64 | 60 | 108 | 64 | 501 | 36 | 14 | 9 | 23 | 0.0 | 0.75 | 0.304 |
| 72 | 60 | 106 | 63 | 48 | 33 | 10 | 8 | 17 | 0.0 | 0.75 | 0.299 |
| 80 | 60 | 95 | 55 | 46 | 30 | 9 | 7 | 16 | 0.0 | 0.79 | 0.204 |
| 88 | 60 | 89 | 51 | 42 | 28 | 7 | 6 | 14 | 0.0 | 0.80 | 0.178 |
Embodiment 5:
The water retaining that embodiment 2 is prepared from restrains by different dosage 44 grams, 48 grams, 52 grams, 56 grams, 60, is mixed with 352 gram solution with water, adds in good magnificent G class g cement 800 grams, and pressing API standard (APISpec10A, 1986) preparation proportion is 1.90g/cm
3Grout.
Method evaluation fluid loss by the oil and gas industry standard SY/T5546-92 of People's Republic of China (PRC) regulation; Press the method evaluation rheological property of SY/T5546-92 regulation, the results are shown in following table 2:
| Sample dosage (gram) | Test temperature | The rotational viscosimeter reading | The API dehydration | Free water | n | K Pa.S n | |||||
| 44 | 60 | 128 | 78 | 62 | 40 | 22 | 15 | 27 | 0.50 | 0.71 | 0.476 |
| 48 | 60 | 122 | 73 | 60 | 45 | 19 | 13 | 23 | 0.30 | 0.74 | 0.369 |
| 52 | 60 | 132 | 78 | 66 | 46 | 24 | 14 | 20 | 0.25 | 0.76 | 0.348 |
| 56 | 60 | 118 | 69 | 50 | 35 | 16 | 10 | 21 | 0.10 | 0.77 | 0.290 |
| 60 | 60 | 128 | 75 | 62 | 42 | 17 | 11 | 21 | 0.15 | 0.79 | 0.258 |
By table 1 and table 2 example as can be known, water retaining of the present invention has good filtrate-loss control energy concurrently, preferably the three-in-one function of slurry flowing performance-changing and lower free water: though dosage does not influence dehydration and other performances in the certain amplitude change; Situ configuration is easy and safety can satisfy the well cementation requirement of different cement, different cement slurry density and different well ' s conditions.
Claims (2)
1, a kind of water retaining of reinforcing oil well decentralized is characterized in that: it is to be prepared from by following weight percentages:
Crosslinked polyvinyl alcohol high molecular polymer 70～85%
Formaldehyde-acetone polycondensate 14～28%
Formic acid 1～2%.
2, the water retaining of a kind of reinforcing oil well decentralized according to claim 1, its preparation method are that crosslinked polyvinyl alcohol high molecular polymer is dropped in the reaction flask by proportioning, heat 40～80 ℃, and stir; To join by the formic acid of proportioning in the reaction flask again, react 30～60 minutes; And then formaldehyde-acetone polycondensate dropped into 40～70 ℃ of another vessel in heating by proportioning, and the formaldehyde-acetone polycondensate of heating is slowly joined in the reaction flask, reacted 60～120 minutes, promptly get the finished product for preparing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101190057A CN100355854C (en) | 2005-11-22 | 2005-11-22 | Dispersion dehydration-reducing agent for oil field well cementation and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101190057A CN100355854C (en) | 2005-11-22 | 2005-11-22 | Dispersion dehydration-reducing agent for oil field well cementation and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1775896A CN1775896A (en) | 2006-05-24 |
| CN100355854C true CN100355854C (en) | 2007-12-19 |
Family
ID=36765619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101190057A Expired - Fee Related CN100355854C (en) | 2005-11-22 | 2005-11-22 | Dispersion dehydration-reducing agent for oil field well cementation and its preparing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100355854C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412600B (en) * | 2008-11-20 | 2011-09-07 | 中国石油天然气集团公司 | Oilwell cement filtrate loss reduction additive |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106543994A (en) * | 2016-09-30 | 2017-03-29 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | A kind of film-forming type oil-well cement filtrate reducer and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2127834A (en) * | 1982-09-27 | 1984-04-18 | Grace W R & Co | A continuous process for making solid, free-flowing water dispersible pva-aldehyde reaction product |
| US5009269A (en) * | 1990-07-31 | 1991-04-23 | Conoco Inc. | Well cement fluid loss additive and method |
| CN1066448A (en) * | 1991-05-08 | 1992-11-25 | 中原石油勘探局钻井工程服务公司 | The manufacture method of sulphonated acetone formaldehyde polycondensates |
| US5594050A (en) * | 1993-04-23 | 1997-01-14 | Dowell Schlumberger Incorporated | Cement composition containing chemically crosslinked polyvinyl alcohol (PVA) |
| CN1407051A (en) * | 2001-08-29 | 2003-04-02 | 中国石油化工股份有限公司 | Water retaining composition for cement for oil well |
| US6739806B1 (en) * | 2003-06-13 | 2004-05-25 | Halliburton Energy Services, Inc. | Cement compositions with improved fluid loss characteristics and methods of cementing in subterranean formations |
| US20050124503A1 (en) * | 2003-06-27 | 2005-06-09 | Halliburton Energy Services, Inc. | Cement compositions with improved fluid loss characteristics and methods of cementing in surface and subterranean applications |
-
2005
- 2005-11-22 CN CNB2005101190057A patent/CN100355854C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2127834A (en) * | 1982-09-27 | 1984-04-18 | Grace W R & Co | A continuous process for making solid, free-flowing water dispersible pva-aldehyde reaction product |
| US5009269A (en) * | 1990-07-31 | 1991-04-23 | Conoco Inc. | Well cement fluid loss additive and method |
| CN1066448A (en) * | 1991-05-08 | 1992-11-25 | 中原石油勘探局钻井工程服务公司 | The manufacture method of sulphonated acetone formaldehyde polycondensates |
| US5594050A (en) * | 1993-04-23 | 1997-01-14 | Dowell Schlumberger Incorporated | Cement composition containing chemically crosslinked polyvinyl alcohol (PVA) |
| CN1407051A (en) * | 2001-08-29 | 2003-04-02 | 中国石油化工股份有限公司 | Water retaining composition for cement for oil well |
| US6739806B1 (en) * | 2003-06-13 | 2004-05-25 | Halliburton Energy Services, Inc. | Cement compositions with improved fluid loss characteristics and methods of cementing in subterranean formations |
| US20050124503A1 (en) * | 2003-06-27 | 2005-06-09 | Halliburton Energy Services, Inc. | Cement compositions with improved fluid loss characteristics and methods of cementing in surface and subterranean applications |
Non-Patent Citations (2)
| Title |
|---|
| 油井水泥外加剂现状与发展 马卫等.钻采工艺，第22卷第3期 1999 * |
| 聚乙烯醇作为油井水泥降失水剂的研究 陆屹等.钻井工程，第25卷第10期 2005 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412600B (en) * | 2008-11-20 | 2011-09-07 | 中国石油天然气集团公司 | Oilwell cement filtrate loss reduction additive |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1775896A (en) | 2006-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Plank et al. | Competitive adsorption between an AMPS®‐based fluid loss polymer and Welan gum biopolymer in oil well cement | |
| Plank et al. | Effect of different anchor groups on adsorption behavior and effectiveness of poly (N, N‐dimethylacrylamide‐co‐Ca 2‐acrylamido‐2‐methylpropanesulfonate) as cement fluid loss additive in presence of acetone–formaldehyde–sulfite dispersant | |
| CN105271962A (en) | Cement mortar for long cementing segment and large temperature difference salt-gypsum bed well cementation, and preparation method thereof | |
| CN102604614B (en) | Anti-flow cementing slurry for well cementation | |
| CN104448136A (en) | Preparation method of while-drilling plugging fluid for oil-based drilling fluid | |
| CN102086387B (en) | Filtrate reducer of cement slurry and application in cementing | |
| CN103525393B (en) | A kind of Instant gelling agent for acid fluid and preparation method thereof and application | |
| CN103788934A (en) | Soil-phase-free oil-based drilling fluid | |
| CN104140803B (en) | Thick oil dispersion viscosity reducer and preparation method thereof | |
| RU2385894C1 (en) | METHOD OF PREPARATION OF LIGHT GROUTING MORTAR OF DENSITY 1450-1500 kg/m3 | |
| RU2553807C1 (en) | Gas-blocking plugging material for cementing horizontal wells with small annular gaps | |
| CN100572491C (en) | Oil well cement-injection pad fluid admixture and preparation method | |
| CN100355854C (en) | Dispersion dehydration-reducing agent for oil field well cementation and its preparing method | |
| CN101440277A (en) | Selective water blockoff agent and preparation thereof | |
| Plank et al. | Modification of the molar anionic charge density of acetone–formaldehyde–sulfite dispersant to improve adsorption behavior and effectiveness in the presence of CaAMPS®‐co‐NNDMA cement fluid loss polymer | |
| CN111019616A (en) | Low-density cement slurry for well cementation operation and cement composition for well cementation operation | |
| CN104927005A (en) | Pre-crosslinked gel swelling particle alkali-resistant profile control agent and preparation method and application thereof | |
| CN102040988B (en) | Oil field well cementation filtration-reducing agent and preparation method thereof | |
| CN104403655A (en) | Novel fracturing fluid for oil field and preparation method of fracturing liquid | |
| CN111218265A (en) | Organic chromium water shutoff profile control agent and preparation method and application thereof | |
| CN106634916A (en) | Preparation method of novel water-based viscosity and pour point reducer | |
| CN106701049A (en) | Fine particle type horizontal well water plugging agent composition and application thereof | |
| CN114106793B (en) | High-temperature-resistant water-based constant-current variable-flow type regulator and preparation method thereof | |
| CN101747883A (en) | Inorganic gel profile control agent | |
| CN102086391A (en) | Hydrophobic guar gum fracturing fluid and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |