CN103983527B - A kind of method of simple measuring Ammonium persulfate. capsule breaker release rate - Google Patents
A kind of method of simple measuring Ammonium persulfate. capsule breaker release rate Download PDFInfo
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- CN103983527B CN103983527B CN201410215709.3A CN201410215709A CN103983527B CN 103983527 B CN103983527 B CN 103983527B CN 201410215709 A CN201410215709 A CN 201410215709A CN 103983527 B CN103983527 B CN 103983527B
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- ammonium persulfate
- capsule breaker
- release rate
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- pressure
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Abstract
A kind of method that the present invention relates to simple measuring Ammonium persulfate. capsule breaker release rate, for the quality of quick and precisely evaluation Ammonium persulfate. capsule breaker, (1) weighs Ammonium persulfate. some parts of capsule breaker that quality is m gram and is respectively placed in crushing chamber；(2) crushing chamber is applied different pressure by pressure-loaded machine respectively, and pressurize 35 minutes；(3) the Ammonium persulfate. capsule breaker applying excess pressure is dissolved in respectively in 1L distilled water and makes it fully dissolve；(4) Ammonium persulfate. capsule breaker aqueous solution is separately heated to uniform temperature, then counts tracking and testing solution pH value under different temperatures in heating process by PH；(5) Ammonium persulfate. capsule breaker release rate R under different pressures different temperatures is calculated the most respectively:
Description
Technical field
The present invention relates to a kind of gel breaker release rate assay method, evaluate Ammonium persulfate. capsule breaker for quick and precisely
Quality.
Background technology
After pressing crack construction, high viscosity fracturing fluid must the most thoroughly break glue and return row, if add too many persulfuric acid when pumping into
Ammonium (APS), fracturing fluid will premature breakdown so that it is prop-carrying capacity weakens, and affects fracturing effect；If consumption is very few, then break glue
Not thorough, oil reservoir and crack are caused injury in various degree.In the application can shape by the encapsulating of Ammonium persulfate. special material
Becoming Microencapsulated Slow product (PAPS), Ammonium persulfate. is isolated with fracturing fluid gel within a certain period of time, and glue will not be caused brokenly to react,
Do not affect the prop-carrying capacity of fracturing fluid, therefore can strengthen the usage amount of gel breaker, fracturing fluid can be made thoroughly to break glue after its release, solve
Determine and pressing crack construction has kept the contradiction of broken glue viscosity reduction after viscosity and construction.
The application of PAPS is closely related with release rate, and current PAPS release rate does not has GB and the unified mensuration side of industry
Method, electrical conductivity method or the iodometric determinations of using more, the wherein measured value of electrical conductivity contribution based on ions all in solution, uncomfortable
Mensuration in cladding APS release rate；And iodometric titrationiodimetry titration and the spectrophotography of employing iodimetric titration principle, mensuration is solution
In real-time S2O8 2-Concentration, at higher temperature measured value less than actual value, and two kinds of assay methods operation complexity.
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 big, it is provided that one
The method planting simple measuring Ammonium persulfate. capsule breaker release rate, breaks glue with the Ammonium persulfate. capsule of quickly detection different formulations
Agent release rate at different conditions, in order to select the Ammonium persulfate. capsule breaker and use being suitable for for reservoir fracturing construction
Amount.
The object of the present invention is achieved like this, a kind of method of simple measuring Ammonium persulfate. capsule breaker release rate,
Comprise the steps:
(1) weigh Ammonium persulfate. some parts of capsule breaker that quality is m gram to be respectively placed in crushing chamber；
(2) crushing chamber is applied different pressure by pressure-loaded machine respectively, and pressurize 3-5 minute, the glue of gel breaker
Capsule fully ruptures；
(3) the Ammonium persulfate. capsule breaker applying excess pressure is dissolved in respectively in 1L distilled water and makes it fully dissolve；
(4) Ammonium persulfate. capsule breaker aqueous solution it is separately heated to uniform temperature and keeps 8-10 minute, then passing through
PH meter tracking and testing solution pH value under different temperatures in heating process；
(5) Ammonium persulfate. capsule breaker release rate R under different pressures different temperatures is calculated the most respectively:
。
Because of (NH4)2S2O8In 1 S2O8 2-2 SO are generated after decomposing in aqueous4 2-With 2 H+If, therefore in capsule
After Ammonium persulfate. release, solution will be in acidity.The pH of ammonium persulfate solution can pass through formula (1) and calculate
(1)；
Wherein (NH4)2S2O8Material amount be 228.20, try to achieve
(2)；
Can be tried to achieve by formula (1), (2)
(3)；
Therefore the quality that can get the Ammonium persulfate. dissolved in aqueous solution is:
(4)；
The release rate that can draw Ammonium persulfate. capsule breaker is:
(5).
In the method for the present invention, by the pH value of the Ammonium persulfate. capsule breaker solution after measuring Pressurized-heated to measure
The acidity of solution, can calculate the quality of the gel breaker of dissolving in solution by the pH value recorded according to formula (4), thus by formula
(5) the release rate R of gel breaker under different pressures and condition of different temperatures can be calculated.Above-mentioned method of testing is used quickly to examine
The Ammonium persulfate. capsule breaker of survey different formulations release rate at different conditions, in order to select suitable for reservoir fracturing construction
The Ammonium persulfate. capsule breaker closed and consumption thereof.
For Accurate Determining gel breaker release rate under conditions of differential pressure, described step (1) measures 5 parts of over cures altogether
Acid ammonium capsule breaker, in step (2) each crushing chamber apply pressure be respectively 10MPa, 20MPa, 30MPa, 40MPa,
50MPa。
For Accurate Determining gel breaker release rate at different temperatures, in described step (4), every part of solution adds the most successively
Heat is to 30 DEG C, 40 DEG C, 50 DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C, and is incubated 8 10 minutes at each temperature spot and makes
Ammonium persulfate. the most fully discharges, more respectively by every part of solution of pH meter tracking and testing respectively 30 DEG C, 40 DEG C, 50
DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C time pH value.
Detailed description of the invention
The present invention is described in detail below with specific embodiment.
Measure 10 grams of Ammonium persulfate. capsule breakers 6 parts to be measured respectively and be placed in the crushing chamber being numbered 1,2,3,4,5,6
In, then by above-mentioned crushing chamber by pressure-loaded machine be forced into respectively 0MPa, 10MPa, 20 MPa, 30 MPa, 40 MPa,
50 MPa, and pressurize 5 minutes；Above-mentioned 6 parts of Ammonium persulfate. capsule breakers are dissolved in respectively fill the 1 of 1L distilled water, 2,3,4,
5, in No. 6 flasks, and stirring makes it fully dissolve；Ammonium persulfate. capsule breaker aqueous solution in each flask is depended on respectively
Secondary it is heated to 30 DEG C, 40 DEG C, 50 DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C, and at above-mentioned each temperature spot, is incubated 10
Minute so that gel breaker fully discharges, simultaneously with pH meter tracking and testing solution pH value after above-mentioned each temperature spot is incubated；Finally
Calculate Ammonium persulfate. capsule breaker release rate R under different pressures different temperatures according to formula (5) respectively and record as follows
In 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, can measure Ammonium persulfate. capsule with simple and fast in the present inventive method and break glue
Agent release rate under the conditions of different temperatures and different pressures, this method both can be used to judge Ammonium persulfate. capsule breaker
Whether release rate meets construction requirement, it is also possible to select satisfactory Ammonium persulfate. capsule breaker according to reservoir situation.
The invention is not limited in above-described embodiment, every on the basis of technical scheme disclosed by the invention, this area
Technical staff according to disclosed technology contents, it is not necessary to some of which technical characteristic just can be made by performing creative labour
Going out some to replace and deformation, these are replaced and deformation is 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) weigh Ammonium persulfate. some parts of capsule breaker that quality is m gram to be respectively placed in crushing chamber；
(2) crushing chamber is applied different pressure by pressure-loaded machine respectively, and pressurize 3-5 minute；
Being dissolved in respectively in 1L distilled water by the Ammonium persulfate. capsule breaker applying excess pressure makes it fully dissolve；
(4) Ammonium persulfate. capsule breaker aqueous solution it is separately heated to uniform temperature and keeps 8-10 minute, then passing through pH meter
Test solution is the pH value under different temperatures in heating process；
(5) Ammonium persulfate. capsule breaker release rate R under different pressures different temperatures is calculated the most respectively:
。
The method of simple measuring Ammonium persulfate. capsule breaker release rate the most according to claim 1, it is characterised in that institute
Stating and measure 5 parts of Ammonium persulfate. capsule breakers in step (1) altogether, the pressure that in step (2), each crushing chamber applies is respectively
10MPa、20MPa、30MPa、40MPa、50MPa。
The method of simple measuring Ammonium persulfate. capsule breaker release rate the most according to claim 1, it is characterised in that institute
State every part of solution in step (4) and be heated to 30 DEG C, 40 DEG C, 50 DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C the most successively, and
At each temperature spot, be incubated 8 10 minutes, more respectively by every part of solution of pH meter tracking and testing respectively 30 DEG C, 40 DEG C, 50
DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C time pH value.
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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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| CN103983527B true CN103983527B (en) | 2016-08-24 |
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| US6162766A (en) * | 1998-05-29 | 2000-12-19 | 3M Innovative Properties Company | 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 |
| CN102627958B (en) * | 2012-03-26 | 2013-10-09 | 中国石油化工股份有限公司 | 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 |
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