CN102478506A - Infrared spectrum analysis method of acid viscosifier sample - Google Patents
Infrared spectrum analysis method of acid viscosifier sample Download PDFInfo
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- CN102478506A CN102478506A CN 201010567530 CN201010567530A CN102478506A CN 102478506 A CN102478506 A CN 102478506A CN 201010567530 CN201010567530 CN 201010567530 CN 201010567530 A CN201010567530 A CN 201010567530A CN 102478506 A CN102478506 A CN 102478506A
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Abstract
The invention discloses an infrared spectrum analysis method of an acid viscosifier sample. The infrared spectrum analysis method of the acid viscosifier sample contains the following steps of: preparing the acid viscosifier sample for later use; purifying the acid viscosifier sample for many times and drying; mixing the dried acid viscosifier sample with a certain amount of potassium bromide, grinding the mixture into a powder, and tabletting for sample preparation; carrying out infrared analysis on the polymerization product; and analyzing the infrared spectrum of the synthesized product by aid of an infrared spectrum manual. According to the invention, the infrared spectrum of the acid viscosifier sample can be rapidly analyzed. In addition, the analysis method provided by the invention has advantages of high analysis precision, short analysis time required and simple operation, and is beneficial for popularization.
Description
Technical field
The present invention relates to a kind of infrared spectrogram analytical approach of gelling agent for acid fluid sample.
Background technology
Viscosifying agent is a macromolecular compound, be dissolved in the acid solution after, can make acid solution produce very high viscosity, its reason is:
(1) volume of macromolecular compound itself is very big, and its resistance is also big when diffusion in solution, and its resistance increases with the increase of molecular weight;
(2) solvation of macromolecular compound has fettered a large amount of free fluids, makes its flowability receive further restriction;
(3) interaction between macromolecule also causes its viscosity to rise, if use crosslinking chemical that the macromolecule of linear structure is become reticulate texture, then its viscosity can increase severely.
The major technique characteristics of gelled acid are after in acid solution, adding viscosifying agent, make it to become lyophilic sol and the rate of propagation that reduces, thereby reach slow purpose.In addition, along with the variation of system viscosity, also improved acidifying solution filtration reduction can and frictional resistance during pumping, the suitable raising of residual sour viscosity has then improved acid solution to the suspension of solid residue with carry performance.
Abroad from the seventies in 20th century gelled acid and construction technology thereof begin to grow up, become a kind of new oil, gas yield-increasing technology very soon.At present, gelling agent for acid fluid commonly used is broadly divided into three types: XC polymer class, cellulose family, synthetic polymer class.Wherein maximum with the research and the application of the polyacrylamide in the synthetic polymer (PAM) series products.
XC polymer class viscosifying agent:
The XC polymer class mainly comprises xanthans, guanidine glue, hydroxypropyl guanidine glue etc.Xanthans has good thickening ability, anti-cutting performance at a certain temperature.Its weak point is the degraded that is subject to bacterium, must add germifuge during use.Guanidine glue class viscosifying agent mainly is to use formaldehyde, and resorcinol carries out the viscosifying agent after crosslinked.Uncrosslinked guanidine glue class viscosifying agent thickening capabilities is not strong, and serviceability temperature is low.Guanidine glue class viscosifying agent thickening capabilities after crosslinked is very strong, and is good with the salt intermiscibility.Unique deficiency is effect and broken glue or the degraded that is subject to enzyme.XC polymer class thickening agent generally can only use under temperature conditions below 60 ℃, and through also only reaching about 70 ℃ after the modification, so its practical application is restricted, thereby consumption is less relatively.Guanidine glue and derivant past thereof are the acid solution thickening agents of using always, seldom use now, in the kind of immediate development also seldom.
The cellulose family viscosifying agent:
Cellulose multiviscosisty agent mainly is cellulosic modified product; Like CMC (CMC), hydroxyethyl cellulose (HEC), CMHEC (CMHEC); Wherein the thickening capabilities with CMHEC is the strongest, and outstanding grittiness can be good, low leak-off; Residue is few, but the cellulose family viscosifying agent is subject to mould and bio-enzyme degradation.Therefore generally adding use under germifuge, low temperature, the low shear rate.
Synthetic polymer class viscosifying agent:
The synthetic polymer class is compared with natural macromolecular material, has heat resistance preferably, and thickening capabilities is strong, and is insensitive to bacterium, and outstanding sand ability is strong, and is little to formation damage.Research is many in this respect both at home and abroad, and its sintetics mainly comprises: acrylic amide, vinyl and cross-linked polymer class.
Acrylic amide: traditional oilfield polymer polyacrylamide (PAM) can only could satisfy the requirement of acidizing treatment through corresponding modification because high temperature resistant, anti-salt and anti-shear ability are not good enough.Acrylamide copolymer after modification has performances such as good thickening, acidproof, high temperature resistant, anti-shearing, anti-salt, is widely used as the acid solution thickening agent.Most modified product is the polymkeric substance of acrylic amide and cationic monomer or anionic monomer.For example, the polymkeric substance of acrylic amide and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) can be used for the thickening of hydrochloric acid, hydrofluorite or the two potpourri.Experiment shows, under 79 ℃ of conditions, by the acid solution of polyacrylamide preparation not only viscosity obviously descend, also generate spongiform residue, and still can keep viscosity, and do not generate residue by the acid solution of this polymer formulation.
Polyvinyls: polyvinyls is widely used as the acid solution thickening agent equally and is used for other well stimulation.Although all not as good as acrylamide copolymer, also is one type of polymer viscosifier that has the potential to be tapped at aspects such as kind quantity, consumption and ranges of application.Wherein the polyvinylpyrrolidone multipolymer is a kind of viscosifying agent of using early, has good thermal stability and shear stability.
Cross-linked polymer: adopt cross-linked polymer, promptly viscosifying agent and crosslinking chemical are used, and also are a kind of effective ways of acid solution thickening.The adding of crosslinking chemical has dual mode: the one, add during the preparation acid solution, and acid liquid viscosity is further improved because of cross-linking reaction; The 2nd, add during the preparation polymer thickening agent, with the solubility in acid of raising viscosifying agent, and then strengthen the multiviscosisty effect.The acid liquid viscosity that adds the cross-linked polymer preparation is quite high, generally all reaches the frozen glue state, therefore generally will be furnished with gel breaker and use.
Because the performance of natural polymer is undesirable, its practical application is restricted, and consumption also reduces relatively; Though being carried out modification, natural polymer can improve its performance to a certain extent.But synthetic polymer class viscosifying agent can improve the heat-resisting property and the anti-salt property of viscosifying agent, and therefore developing synthetic polymer has exigence, and this also is the focus of studying both at home and abroad at present.Copolymerization to the purity requirement of monomer than higher, so before reacting, need purify to the monomer that is about to participate in reaction.The purpose of purifying is to remove the polymerization inhibitor and some impurity monomers that is mixed with in the starting monomer, in order to avoid because the existence of these impurity exerts an adverse impact to polyreaction, make polymerization product not reach expected effect.
Various organic compounds and many mineral compounds all produce the absorption spectrum of different characteristic at electromagnetic region of ultra-red, so infrared spectrum has been widely used in the qualitative and quantitative analysis of material.When infrared rayed material, material can absorb a part of radiation, and the electronic transition of the emittance of absorption in can excited molecule is to higher energy level or increase the vibration and the rotational energy of atom in the molecule.For a certain material molecule, it can only absorb the radiation of some characteristic frequency.Therefore the people's structure that can judge unknown material according to position and the shape of absorption peak in the spectrum accordings to the intensity of characteristic absorption peak and measures each components contents in the potpourri.
Infrared spectrum occupies crucial status in the research of polymkeric substance.It can provide qualitative and quantitative analytical information for aspects such as the chemical property of polymkeric substance, spatial structure, conformations; Infrared spectrum is in backbone structure, the substituent position of identifying polymkeric substance, and aspects such as the position of two keys, side-chain structure have obtained using widely.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art; A kind of infrared spectrogram analytical approach of gelling agent for acid fluid sample is provided; The infrared spectrogram of the infrared spectrogram analytical approach ability express-analysis gelling agent for acid fluid sample of this gelling agent for acid fluid sample, and analysis precision is high, and required time is short; Simple to operate, be beneficial to popularization.
The object of the invention is realized through following technical proposals: a kind of infrared spectrogram analytical approach of gelling agent for acid fluid sample may further comprise the steps:
(a) preparation gelling agent for acid fluid sample is subsequent use;
(b) the gelling agent for acid fluid sample is repeatedly purified after, the oven dry;
(c) with the gelling agent for acid fluid sample of oven dry and the shape of claying into power after a certain amount of potassium bromide mixes, compressing tablet sample preparation then;
(d) at last polymerization product is made infrared analysis;
(e), analyze the infrared spectrogram of sintetics by means of the infrared spectrum handbook.
In the said step (b), the gelling agent for acid fluid sample dissolution is purified through absolute ethyl alcohol.
In the said step (d), polymerization product is made infrared analysis through infrared spectrometer.
Said infrared spectrometer is Tianjin, island IR-440 type infrared spectrometer.
In sum, the invention has the beneficial effects as follows: the infrared spectrogram of ability express-analysis gelling agent for acid fluid sample, and analysis precision is high, and required time is short, and is simple to operate, is beneficial to popularization.
Embodiment
Below in conjunction with embodiment, the present invention is done further detailed description, but embodiment of the present invention is not limited only to this.
Embodiment:
The infrared spectrogram analytical approach of a kind of gelling agent for acid fluid sample that the present invention relates to, its concrete steps are following:
(a) preparation gelling agent for acid fluid sample is subsequent use;
(b) the gelling agent for acid fluid sample is repeatedly purified after, the oven dry;
(c) with the gelling agent for acid fluid sample of oven dry and the shape of claying into power after a certain amount of potassium bromide mixes, compressing tablet sample preparation then;
(d) at last polymerization product is made infrared analysis;
(e), analyze the infrared spectrogram of sintetics by means of the infrared spectrum handbook.
In the said step (b), the gelling agent for acid fluid sample dissolution is purified through absolute ethyl alcohol.
In the said step (d), polymerization product is made infrared analysis through infrared spectrometer.
Said infrared spectrometer is Tianjin, island IR-440 type infrared spectrometer.
The infrared spectrogram of said method ability express-analysis gelling agent for acid fluid sample, and analysis precision is high, and required time is short, and is simple to operate, is beneficial to popularization.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations to above embodiment did all fall within protection scope of the present invention.
Claims (4)
1. the infrared spectrogram analytical approach of a gelling agent for acid fluid sample is characterized in that, may further comprise the steps:
(a) preparation gelling agent for acid fluid sample is subsequent use;
(b) the gelling agent for acid fluid sample is repeatedly purified after, the oven dry;
(c) with the gelling agent for acid fluid sample of oven dry and the shape of claying into power after a certain amount of potassium bromide mixes, compressing tablet sample preparation then;
(d) at last polymerization product is made infrared analysis;
(e), analyze the infrared spectrogram of sintetics by means of the infrared spectrum handbook.
2. the infrared spectrogram analytical approach of a kind of gelling agent for acid fluid sample according to claim 1 is characterized in that, in the said step (b), through absolute ethyl alcohol the gelling agent for acid fluid sample dissolution is purified.
3. the infrared spectrogram analytical approach of a kind of gelling agent for acid fluid sample according to claim 1 is characterized in that, in the said step (d), through infrared spectrometer polymerization product is made infrared analysis.
4. the infrared spectrogram analytical approach of a kind of gelling agent for acid fluid sample according to claim 3 is characterized in that, said infrared spectrometer is Tianjin, island IR-440 type infrared spectrometer.
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| CN 201010567530 CN102478506A (en) | 2010-11-22 | 2010-11-22 | Infrared spectrum analysis method of acid viscosifier sample |
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| CN 201010567530 CN102478506A (en) | 2010-11-22 | 2010-11-22 | Infrared spectrum analysis method of acid viscosifier sample |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153616A (en) * | 2016-09-14 | 2016-11-23 | 西南石油大学 | A kind of slippery water that measures returns the method for thickening agent content in discharge opeing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153616A (en) * | 2016-09-14 | 2016-11-23 | 西南石油大学 | A kind of slippery water that measures returns the method for thickening agent content in discharge opeing |
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Application publication date: 20120530 |