CN103983527A - Method for simply measuring release rate of ammonium persulfate capsule gel breaker - Google Patents
Method for simply measuring release rate of ammonium persulfate capsule gel breaker Download PDFInfo
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- CN103983527A CN103983527A CN201410215709.3A CN201410215709A CN103983527A CN 103983527 A CN103983527 A CN 103983527A CN 201410215709 A CN201410215709 A CN 201410215709A CN 103983527 A CN103983527 A CN 103983527A
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- ammonium persulfate
- persulfate capsule
- gel breaker
- release rate
- capsule gel
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Abstract
The invention relates to a method for simply measuring the release rate of an ammonium persulfate capsule gel breaker. The method is used for rapidly and accurately evaluating the quality of the ammonium persulfate capsule gel breaker. The method comprises the steps of (1) weighing a plurality of parts of mg of ammonium persulfate capsule gel breaker, respectively arranging the ammonium persulfate capsule gel breaker in a crushing chamber; (2) respectively applying different pressures to the crushing chamber through a pressure applying machine, pressurizing for 3-5min; (3) respectively dissolving the pressurized ammonium persulfate capsule gel breaker in 1L distilled water and fully dissolving the ammonium persulfate capsule gel breaker; (4) respectively heating an ammonium persulfate capsule gel breaker water solution to a certain temperature, tracking pH values under different temperatures in a heating process through a pH meter; and (5) respectively calculating release rates R of the ammonium persulfate capsule gel breaker under different pressures and different temperatures according to the following formula described in the specification.
Description
Technical field
The present invention relates to a kind of gel breaker release rate assay method, for quick and precisely evaluating the quality of ammonium persulfate capsule breaker.
Background technology
After pressing crack construction, high viscosity fracturing fluid must thoroughly break as early as possible glue and return row, if add too many ammonium persulfate (APS) when pumping into, fracturing liquid will be degraded too early, and its prop-carrying capacity is weakened, and affects fracturing effect; If consumption is very few, broken glue is not thorough, and oil reservoir and crack are caused to injury in various degree.In application, ammonium persulfate is sealed and can be formed Microencapsulated Slow product (PAPS) with special material, ammonium persulfate is isolated with fracturing fluid gel within a certain period of time, can not cause brokenly glue reaction, do not affect of the fracturing fluid prop-carrying capacity, therefore can strengthen the use amount of gel breaker, it can make thoroughly broken glue of fracturing liquid after discharging, solved the contradiction of broken glue viscosity reduction after keeping viscosity in pressing crack construction and constructing.
Application and the release rate of PAPS are closely related, PAPS release rate does not have GB and the unified assay method of industry at present, electrical conductivity method or the iodometric determinations of adopting more, the wherein contribution of the measured value of conductivity based on all ions in solution, is unsuitable for the mensuration of coated APS release rate; And iodometric titrationiodimetry titration and the spectrophotometric method that adopts iodimetric titration principle, mensuration be S in real time in solution
2o
8 2-concentration, at higher temperature measured value, be less than actual value, and two kinds of assay method complicated operations.
Summary of the invention
The present invention is directed to the problem that in prior art, gel breaker release rate method of testing is complicated, measurement error is large, a kind of method of simple measuring ammonium persulfate capsule breaker release rate is provided, release rate with the ammonium persulfate capsule breaker of fast detecting different formulations under different condition, so that select applicable ammonium persulfate capsule breaker and consumption for reservoir fracturing construction.
The object of the present invention is achieved like this, and a kind of method of simple measuring ammonium persulfate capsule breaker release rate, comprises the steps:
(1) taking quality is that the some parts of the ammonium persulfate capsule breaker of m gram are placed in respectively crushing chamber;
(2) crushing chamber is applied to different pressure by pressure-loaded machine respectively, and pressurize 3-5 minute, the capsule of gel breaker fully breaks;
(3) the ammonium persulfate capsule breaker that applies excess pressure is dissolved in respectively in 1L distilled water and it is fully dissolved;
(4) ammonium persulfate capsule breaker aqueous solution is heated to respectively to uniform temperature and keeps 8-10 minute, then by pH meter tracking and testing solution pH value under different temperatures in heating process;
(5) by following formula, calculate respectively the release rate R of ammonium persulfate capsule breaker under different pressures different temperatures:
。
Because of (NH
4)
2s
2o
8in 1 S
2o
8 2-after decomposing, generate 2 SO in aqueous solution
4 2-with 2 H
+if after therefore the ammonium persulfate in capsule discharges, it is acid that solution will be.The pH of ammonium persulfate solution can calculate by through type (1)
（1）；
(NH wherein
4)
2s
2o
8amount be 228.20, try to achieve
（2）；
Through type (1), (2) can be tried to achieve
（3）；
The quality of the ammonium persulfate that therefore can obtain dissolving in aqueous solution is:
（4）；
The release rate that can draw ammonium persulfate capsule breaker is:
（5）。
In method of the present invention, pH value by measuring the ammonium persulfate capsule breaker solution after Pressurized-heated is to measure the acidity of solution, by the pH value recording, according to formula (4), can calculate the quality of the gel breaker dissolving in solution, thereby by formula (5), can calculate the release rate R of gel breaker under different pressures and condition of different temperatures.Adopt ammonium persulfate capsule breaker that above-mentioned method of testing can the fast detecting different formulations release rate under different condition, so that select applicable ammonium persulfate capsule breaker and consumption thereof for reservoir fracturing construction.
For the release rate of Accurate Determining gel breaker under different pressure conditions, in described step (1), measure altogether 5 parts of ammonium persulfate capsule breakers, in step (2), each crushing chamber applied pressure is respectively 10MPa, 20MPa, 30MPa, 40MPa, 50MPa.
For the release rate of Accurate Determining gel breaker under different temperatures, in described step (4), every part of solution is heated to respectively 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, 90 ℃, 100 ℃ successively, and within 8-10 minutes, make ammonium persulfate fully discharge at this temperature in the insulation of each temperature spot place, more respectively by every part of solution of pH meter tracking and testing pH value 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, 90 ℃, 100 ℃ time respectively.
Embodiment
With specific embodiment, describe the present invention in detail below.
Measuring respectively 6 parts of 10 grams of ammonium persulfate capsule breakers to be measured, to be placed in label be 1,2,3,4,5,6 crushing chamber, then above-mentioned crushing chamber is forced into respectively to 0MPa, 10MPa, 20 MPa, 30 MPa, 40 MPa, 50 MPa by pressure-loaded machine, and pressurize 5 minutes; Above-mentioned 6 parts of ammonium persulfate capsule breakers are dissolved in respectively in 1,2,3,4,5, No. 6 flask that fills 1L distilled water, and stirring is fully dissolved it; Ammonium persulfate capsule breaker aqueous solution in each flask is heated to respectively to 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, 90 ℃, 100 ℃ successively, and at above-mentioned each temperature spot place, be incubated 10 minutes so that gel breaker fully discharges, simultaneously by pH meter tracking and testing solution pH value after above-mentioned each temperature spot insulation; Finally according to formula (5), calculate respectively the release rate R of ammonium persulfate capsule breaker under different pressures different temperatures and be recorded in as in following table 1.
Table 1
| Temperature | 0MPa | 10MPa | 20MPa | 30MPa | 50MPa |
| 30℃ | 0.00 | 0.01% | 0.01% | 0.01% | 15.49% |
| 40℃ | 0.00 | 0.01% | 0.01% | 0.01% | 19.50% |
| 50℃ | 0.00 | 0.04% | 0.04% | 0.04% | 24.55% |
| 60℃ | 0.00 | 1.45% | 1.15% | 1.66% | 30.20% |
| 70℃ | 0.11% | 1.45% | 1.70% | 1.95% | 38.02% |
| 80℃ | 0.58% | 2.00% | 2.34% | 2.88% | 45.71% |
| 90℃ | 0.93% | 3.47% | 4.07% | 4.37% | 51.29% |
| 100℃ | 4.37% | 6.03% | 6.31% | 7.24% | 57.54% |
The test result of record from table 1, by method of the present invention, can measure the release rate of ammonium persulfate capsule breaker under different temperatures and different pressures condition by simple and fast, this method both can be used for judging whether the release rate of ammonium persulfate capsule breaker meets construction requirement, also can select satisfactory ammonium persulfate capsule breaker according to reservoir situation.
The present invention is not limited to above-described embodiment; every on the basis of technical scheme disclosed by the invention; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in the scope of protection of the invention.
Claims (3)
1. a method for simple measuring ammonium persulfate capsule breaker release rate, comprises the steps:
(1) taking quality is that the some parts of the ammonium persulfate capsule breaker of m gram are placed in respectively crushing chamber;
(2) crushing chamber is applied to different pressure by pressure-loaded machine respectively, and pressurize 3-5 minute;
The ammonium persulfate capsule breaker that applies excess pressure is dissolved in respectively in 1L distilled water it is fully dissolved;
(4) ammonium persulfate capsule breaker aqueous solution is heated to respectively to uniform temperature and keeps 8-10 minute, then by pH meter test solution pH value under different temperatures in heating process;
(5) by following formula, calculate respectively the release rate R of ammonium persulfate capsule breaker under different pressures different temperatures:
。
2. the method for simple measuring ammonium persulfate capsule breaker release rate according to claim 1, it is characterized in that, in described step (1), measure altogether 5 parts of ammonium persulfate capsule breakers, in step (2), each crushing chamber applied pressure is respectively 10MPa, 20MPa, 30MPa, 40MPa, 50MPa.
3. the method for simple measuring ammonium persulfate capsule breaker release rate according to claim 1, it is characterized in that, in described step (4), every part of solution is heated to respectively 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, 90 ℃, 100 ℃ successively, and each temperature spot place insulation 8-10 minutes, more respectively by every part of solution of pH meter tracking and testing pH value 30 ℃, 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃, 90 ℃, 100 ℃ time respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410215709.3A CN103983527B (en) | 2014-05-20 | 2014-05-20 | A kind of method of simple measuring Ammonium persulfate. capsule breaker release rate |
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|---|---|---|---|
| CN201410215709.3A CN103983527B (en) | 2014-05-20 | 2014-05-20 | A kind of method of simple measuring Ammonium persulfate. capsule breaker release rate |
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| CN103983527A true CN103983527A (en) | 2014-08-13 |
| CN103983527B CN103983527B (en) | 2016-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108300450A (en) * | 2018-03-30 | 2018-07-20 | 王建东 | A kind of preparation method of the special gel breaker of aqueous fracturing fluid |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010016562A1 (en) * | 1998-05-29 | 2001-08-23 | Muir David J. | Encapsulated breakers, compositions and methods of use |
| CN102627958A (en) * | 2012-03-26 | 2012-08-08 | 扬州大学 | Efficient microcapsule gel breaker and preparation method thereof |
| CN102998202A (en) * | 2011-09-14 | 2013-03-27 | 倪蕊 | Method for determining release rate of liquid microcapsule gel breaker |
| CN103712986A (en) * | 2012-10-09 | 2014-04-09 | 吴林松 | Method for testing effective content of capsule breaker |
-
2014
- 2014-05-20 CN CN201410215709.3A patent/CN103983527B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010016562A1 (en) * | 1998-05-29 | 2001-08-23 | Muir David J. | Encapsulated breakers, compositions and methods of use |
| CN102998202A (en) * | 2011-09-14 | 2013-03-27 | 倪蕊 | Method for determining release rate of liquid microcapsule gel breaker |
| CN102627958A (en) * | 2012-03-26 | 2012-08-08 | 扬州大学 | Efficient microcapsule gel breaker and preparation method thereof |
| CN103712986A (en) * | 2012-10-09 | 2014-04-09 | 吴林松 | Method for testing effective content of capsule breaker |
Non-Patent Citations (1)
| Title |
|---|
| 余渝等: "《一种测定过硫酸铵胶囊破胶剂释放率的新方法》", 《钻井液与完井液》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108300450A (en) * | 2018-03-30 | 2018-07-20 | 王建东 | A kind of preparation method of the special gel breaker of aqueous fracturing fluid |
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