CN101307224A - High-temperature resistant water-based insulating liquid - Google Patents
High-temperature resistant water-based insulating liquid Download PDFInfo
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- CN101307224A CN101307224A CNA2008101376331A CN200810137633A CN101307224A CN 101307224 A CN101307224 A CN 101307224A CN A2008101376331 A CNA2008101376331 A CN A2008101376331A CN 200810137633 A CN200810137633 A CN 200810137633A CN 101307224 A CN101307224 A CN 101307224A
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Abstract
The invention discloses a high temperature resistant sealing liquid which consists of the following compositions by weight portion: 100 portions of water, 5 portions of Attapulgite, 2.5 portions of a suspending agent, 1 portion of polypropylene sulfonate and 0 to 120 portions of baryta powder, wherein, the suspending agent is a multipolymer of vinylphenol, 2 acrylamido-2- methylpropanesulfonic acid, acrylic acid and acrylamide, and the portions of the compositions are weight portions The water-based sealing liquid has the functions of pressing, stabilizing, separating and replacing, etc. in the well cementation process of a deep well and an ultradeep well (a well bottom circulating temperature is up to 180 DEG C); moreover, the water-based sealing liquid can improve the interface cementation quality.
Description
Technical field:
The present invention relates to a kind of spacer pad used in the oil drilling well cementation field, especially a kind of high-temperature resistant water-based insulating liquid.
Background technology:
Along with growing, the oil-gas exploration difficulty of oil gas demand increases gradually, the appearance of deep-well ultra deep well and complex hydrocarbon well, to the requirement of oil gas well cementing operation quality with to improve the difficulty of cementing quality more and more higher, and more and more higher temperature in wellbore is also for cementing technology has proposed a difficult problem, and domestic original spacer pad technology has not satisfied the demand of modern well cementation.Cementing quality problems such as exploitation of domestic process of complex reservoir exploration and exceptional well cementing quality problem are mainly reflected in that the well cementation displacement efficiency is low, the water breakthrough of annular space oil gas and interface agglutination are of poor quality are that solution influences one of the important means of cementing quality factor and measure and adopt fine high temperature resistance spacer pad technology.
External spacer pad has become serial commodity worldwide to be sold, as U.S. road Weir company existing SPACE1000, SPACE1001, four kinds of spacer pads of SPACE3000, SPACE3001.Wherein SPACE1000, SPACE3000 are used for water-based mud, and SPACE1001, SPACE3001 are used for oil-base mud; The two kinds of water-based insulating liquids of MUDPUSH2, MUDPUSH WHT that also have road Weir company, but 170 ℃ of MUDPUSH WHT temperature resistances wherein, not only temperature does not reach the requirement of temperature in wellbore, and other performance index do not reach the requirement of above-mentioned well yet, costs an arm and a leg.Be used for the WBS flushing spacer fluid that deep-well high temperature resistance spacer pad also has Fei Lipusi, this spacer pad has good rheological and sedimentation stability, but 150 ℃ of requirements that do not reach 150 ℃ of above-mentioned temperature in wellbore of temperature resistance.
The China's oil industry is also more and more paid attention to spacer pad, and technical study has also had and develops rapidly, and the flushing spacer fluid product that is suited to local conditions has been developed in each oil field in succession, has developed the anticalcium spacer pad as Sichuan oilfield; The SNC spacer pad has been developed in the Zhongyuan Oil Field; The CSA spacer pad has been developed in oil of bay field, Guizhou Province, Yunnan; The GYW101 of Southwest Petroleum Institute; GYW201, GYW202; GYW301, GYW302 series spacer pad.Daqing oil field has developed that DSF spacer pad, SAPP spacer pad, DZG are adjusted the well high density flushing spacer fluid, YJC increases the weight of spacer pad, DG water-based insulating liquid etc., and the highest temperature resistance index of domestic spacer pad reaches 150 ℃.
Summary of the invention:
In order to overcome the deficiency in the background technology, the invention provides a kind of high-temperature resistant water-based insulating liquid.This water-based insulating liquid plays that important pressure is steady, effects such as isolation and replacement in deep-well ultra deep well (bottom hole circulating temperature is up to 180 ℃) well cementation process; And the interface agglutination quality is also played certain improvement effect.
The technical scheme of employing of the present invention is: this high-temperature resistant water-based insulating liquid is made up of following each component: 100 parts in water, 5 parts of attapulgites, 2.5 parts of suspension agents, 1 part of polypropylene sodium sulfonate and ground barium sulfate 0-120 part, above-mentioned suspension agent is that the umber of above-mentioned each component is a weight part to the multipolymer of vinylphenol, 2 acrylamidos-2-methyl propane sulfonic acid, vinylformic acid and acrylamide.
The molecular weight of described polypropylene sodium sulfonate is 80-100 ten thousand; The molecular weight of suspension agent is 120-150 ten thousand.
The present invention has following beneficial effect: 1. this fluid partitioning ties up to and has stable suspension under the hot conditions, and has both excellent compatibility.Density is at 1.05～1.70g/cm
3Adjustable arbitrarily in the scope; Solved the contradiction between suspension and the rheological effectively.2. this separating liquid system has stronger heat-resisting property, and temperature has the secondary suspending power when being higher than 120 ℃, has guaranteed the continuity that system temperature is inherited, thereby forms anti-180 ℃ of stable suspension systems (seeing Table 1).
Anti-180 ℃ of water-based insulating liquid suspension stability testing data table tables 1
Description of drawings:
Fig. 1 liquid for plugging anti-channeling test-results graphic representation;
Fig. 2 liquid for plugging anti-channeling test-results graphic representation.
Embodiment:
The invention will be further described below in conjunction with embodiment:
This high temperature resistance fluid partitioning ties up to Daqing oil field fragrant 9-2, Xu Shen 17, Xu Shen 232, Xu Shen 42,212 6 mouthfuls of wells of Xu Shen 24, Xu Shen deeply and has carried out test in place, and qualification rate 100%, test situation see the following form 2.
Anti-180 ℃ of water-based insulating liquid test in place information slips 2
From the cementing operation situation, spacer pad density is even, pumping easily, and construction technology is simple.Xu Shen 17, Xu Shen 232, Xu Shen 42, Xu Shen 24, Xu Shen 212 wells all adopt two-stage cementing technology, and after one-level well cementation finished, the drilling fluid that returns out in the washing well process, washing fluid, spacer pad interface were clear, and it is short to mix the slurry section.Cement face top, the cement mantle strong bonding.Illustrate that spacer pad and grout consistency are good, spacer pad and grout mixing rear interface strong bonding help improving cementing quality.
Claims (3)
1, a kind of high-temperature resistant water-based insulating liquid, it is characterized in that: form: 100 parts in water, 5 parts of attapulgites, 2.5 parts of suspension agents, 1 part of polypropylene sodium sulfonate and ground barium sulfate 0-120 part by following each component, above-mentioned suspension agent is that the umber of above-mentioned each component is a weight part to the multipolymer of vinylphenol, 2 acrylamidos-2-methyl propane sulfonic acid, vinylformic acid and acrylamide.
2, high-temperature resistant water-based insulating liquid according to claim 1 is characterized in that: the molecular weight of polypropylene sodium sulfonate is 80-100 ten thousand.
3, high-temperature resistant water-based insulating liquid according to claim 1 is characterized in that: the molecular weight of suspension agent is 120-150 ten thousand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101376331A CN101307224A (en) | 2008-07-01 | 2008-07-01 | High-temperature resistant water-based insulating liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101376331A CN101307224A (en) | 2008-07-01 | 2008-07-01 | High-temperature resistant water-based insulating liquid |
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| Publication Number | Publication Date |
|---|---|
| CN101307224A true CN101307224A (en) | 2008-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101376331A Pending CN101307224A (en) | 2008-07-01 | 2008-07-01 | High-temperature resistant water-based insulating liquid |
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| CN (1) | CN101307224A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921580A (en) * | 2010-06-30 | 2010-12-22 | 西南石油大学 | High temperature resistant anti-salt isolation solution and preparation method thereof |
| CN103571443A (en) * | 2013-04-02 | 2014-02-12 | 中国石油化工股份有限公司 | Fiber flushing spacer fluid for oilfield well cementation |
| CN109135697A (en) * | 2018-09-18 | 2019-01-04 | 中国石油集团西部钻探工程有限公司 | Ultra high density displacement of reservoir oil insulating liquid resistant to high temperatures and preparation method thereof |
-
2008
- 2008-07-01 CN CNA2008101376331A patent/CN101307224A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921580A (en) * | 2010-06-30 | 2010-12-22 | 西南石油大学 | High temperature resistant anti-salt isolation solution and preparation method thereof |
| CN101921580B (en) * | 2010-06-30 | 2011-09-07 | 西南石油大学 | High temperature resistant anti-salt isolation solution and preparation method thereof |
| CN103571443A (en) * | 2013-04-02 | 2014-02-12 | 中国石油化工股份有限公司 | Fiber flushing spacer fluid for oilfield well cementation |
| CN103571443B (en) * | 2013-04-02 | 2016-02-24 | 中国石油化工股份有限公司 | Reinforcing oil well Fiber wash spacer pad |
| CN109135697A (en) * | 2018-09-18 | 2019-01-04 | 中国石油集团西部钻探工程有限公司 | Ultra high density displacement of reservoir oil insulating liquid resistant to high temperatures and preparation method thereof |
| CN109135697B (en) * | 2018-09-18 | 2020-10-16 | 中国石油集团西部钻探工程有限公司 | High-temperature-resistant ultrahigh-density oil displacement isolation liquid and preparation method thereof |
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Open date: 20081119 |