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Petroleum and Natural Gas Industry Standard of the People's Republic of China SY5592—93
Polymer Gel PIA-605 Profile Control Agent
Published on March 27, 1993
Ministry of Energy of the People's Republic of China
Implemented on September 1, 1993
Main Contents and Scope of Application
Petroleum and Natural Gas Industry Standard of the People's Republic of China Polymer Gel PIA-605 Profile Control Agent
SY 5592—93
This standard specifies the quality indicators, implementation methods, testing rules, marking, packaging, transportation and storage of polymer jelly PIA-605 profile control agent products.
This standard applies to the quality inspection of profile control agent raw materials and profile control agent performance. 2 Reference standards
GB 12005.2--89
Determination method of solid content of polyacrylamide
GB12005.3-89Determination method of residual acrylamide in polyacrylamideBromide methodGB 12005.6-89
GR 12005.7-89
Partially hydrolyzed polyacrylamideHydroxy-dextrin methodDetermination method of particle size of powdered polyacrylamide
GB12005.8-89
Determination method of dissolution rate of powdered polyacrylamide3 Terminology
Profile control agent; chemical agent that can adjust the suction profile of water injection formation. 4PA-605 Technical indicators of profile control agent
4. 1 Polyacrylamide for profile control agent
According to the physical and chemical performance indicators of acrylamide for profile control agent provided in this standard, the requirements of Table 1 shall be met. Table 1
Aperture 0.9 mm sieving rate, %
Solid content,
Dissolution rate, min
And molecular weight
Degree of hydrolysis, %
Free endonic acyl monomer content, %
4.2 Test method
4.2.1 Reagents and instruments
Free-flowing granules
180 (completely dissolved)
3×10°～5×10g
a: Ubbelohde viscometer: model 4-0.58, quantitative ball volume 4ml, capillary inner diameter 0.58mml Ministry of Energy of the People's Republic of China approved the standard on March 27, 1993
Implementation on September 1, 1993
b, acidometer, error is ±2%
SY 5592--93
c. Viscometer, RV-2 rotary viscometer or similar products, measuring error does not exceed ±4%, d. Constant temperature water bath, temperature difference ±0.5℃,
e. Analytical balance, sensitivity 0.1mg
f. Waring stirrer,
9. Electric magnetic stirrer,
h. Sand core funnel G-2 type,
i. Sodium nitrate standard solution, CENaNO,=2mol/l, small,
k. Coagulant, chemically pure,
I. Oxalic acid, chemically pure#
m. Coagulant solution (m/m): 5% aqueous solutionn Stabilizer solution (m/m), 80% water soluble wave 0. Oxalic acid solution (m/m): 10% aqueous solution. 4.2.2 Determination of solid content
Determination method see GI312005.2.
4.2.3 Determination of free monomers
Determination method see GB12005.3.
.4.2.4 Determination of degree of hydrolysis
Determination method see GB12005.6.
4.2.5 Determination of dissolution rate
Determination method see GB12005.7.
4.2.6 Determination of particle size
Determination method see GB12005.7.
4.2.7 Determination of relative molecular mass
4.2.7.1 Determination method
a. Weigh 0.1g (accurate to 0.0002g) of three samples with known solid content in a 100ml beaker, add 40-50ml distilled water to soak for 1-2min, stir the sample until it is completely dissolved, transfer it to a 100ml volumetric flask, dilute it to the mark with distilled water to obtain a solution with a concentration of 0.1%, filter it with a sand core funnel, and draw 50ml of this solution and mix it evenly with 50ml, 2mol/1 sodium nitrate standard solution to determine the flow-through time of the sample solution.
b. Take another 50ml sodium nitrate standard solution and mix it evenly with 50ml distilled water, filter it with a sand core funnel to determine the flow-through time of the solution. c. Keep the temperature at 30±0.1℃ for 15min, and measure the time t1 for the sample solution and the droplet to flow through the island viscometer scale respectively. 4.2.7.2 Calculation of relative mass
The relative molecular mass is calculated according to formula (1):
M -1.565 ×10'EmJ1.n15
Wherein, M is the viscosity-average relative molecular mass, - characteristic viscosity = 2(
C is the concentration of the polymer in the test solution, %/m1snan
Specific viscosity = 1, dimensionless;
1nm - natural logarithm of relative viscosity = 1n
4.3 Determination of PIA-605 dispensing performance
$Y 5592--93
The performance of the adjuster provided in this standard shall meet the requirements of Table 2. Table 2
Observed viscosity of the inducing agent solution, mPa-s
Hydration time, d
Gel viscosity, mPa-s
Taper rate, %
Viscosity reduction rate of the adjusting agent solution after constant temperature,
Shear pressure Viscosity reduction of the adjusting agent solution, gel viscosity reduction rate after shearing, %
4.3.1Preparation of PIA-605 adjuster solution
Colorless or light pink liquid
22. 0×104
In a 1501 beaker, add 100ml of prepared water (plain water or simulated water), then slowly add 1.0g of powdered profile control agent main agent under stirring, and after complete dissolution, add 0.4ml of accelerator solution and 0.25ml of stabilizer solution respectively, and then adjust the pH value to 4-6 with oxalic acid. 4.3.2 Determination of pH value
Take 50ml of profile control agent solution sample, determine the pH value with an acidometer, and take the arithmetic mean. 4.3.3 Determination of apparent viscosity
After filtering the profile control agent solution through a glass filter, take 25ml and load it into a rotary viscometer The sleeve is then fixed to the viscometer as required, and then the heat sleeve is installed. The constant humidity water bath is used to maintain a constant temperature of 50 ± 0.5 ° C for 15 minutes, and the viscosity is measured. The output signal reading is recorded, and the apparent viscosity at a shear rate of 243s-1 is calculated according to formula (2). The measurement is repeated three times and the average value is calculated. The determination and calculation of the viscosity of the gel is the same as that of the profile control agent solution, and the shear rate is 1.5s~l.
Where: n——apparent viscosity, nPa*s, shear stress, mPal
D, shear rate, s-1,
A——shear stress factor, imPa/minute The S indicator signal scale.
4.3.4 Scale of gelling time
In 30 sealable 60ml wide-mouth bottles, fill 30-40ml of the prepared profile control solution respectively, and then put the wide-mouth bottles containing the profile control solution into a water bath at a specified temperature for constant temperature examination. Samples are taken at different times to measure the viscosity according to the steps described in 4.3.3, and then the viscosity at different times is plotted on a semi-logarithmic coordinate paper to show the relationship between the viscosity of the profile control solution and time (see Figure 1). A straight line perpendicular to the horizontal axis is drawn from the minimum point of the semi-light curvature, and the intersection A of the line and the time coordinate axis is the gelling time. 4.3.5 Stability
Stability refers to the heat resistance of the profile control solution in the uniform plugging layer and the shear resistance during the pumping process. Keep the profile control solution at a constant temperature of 40-65℃ for more than 30 days, and calculate the viscosity reduction rate according to formula (3). K=_70=11×100%.
In the formula, the viscosity reduction rate,
SY 5592--93
is the viscosity of the profile control agent when it is not kept at a constant temperature for more than 30 days, and n1 is the viscosity of the profile control agent solution after being kept at a constant temperature for more than 30u. The anti-shear test is to use a Waring stirrer to shear the profile control agent porcelain liquid for 120 minutes at a shear rate of 3000s-1, and the viscosity reduction rate of the profile control agent is calculated according to formula (4).
Ki-2= ×100%
In the formula: Kt—Viscosity reduction rate
72——Viscosity of the profile control agent solution before shearing
—Viscosity of the profile control agent solution after shearing.
The viscosity reduction rate of the gel after shearing is calculated according to formula (5). K2=type×100%
Wherein: K2—Viscosity F drop rate
Jelly viscosity before shearing
Jelly viscosity after shearing.
4.3.6 Determination of blocking rate
4.3.6.1 Experimental instruments
, a, core test instrument
b.Artificial cemented columnar core: diameter 2.5cm, length 5.0cm, heated water bath, temperature difference ±0.5℃C.
Time (d)
Relationship between viscosity and time
4.3.6.2 Experimental steps
a. Determine the original water phase permeability of the artificial core. b. Inject 5 times the pore volume of the adjusting agent solution; c. Keep the temperature constant for 3d
d. Determine the water phase permeability after plugging.
4.3.6.3 Calculation
The plugging rate is calculated according to formula (6):
Where: K—original water permeability,
K-2—-water phase permeability after plugging.
.5 Precision
SY5592-93
Blocking rate = K×100%
（6）
The number of digits of accuracy of each calculation result shall be as specified in Table 3, and shall be rounded off in accordance with GB170 "Numerical Rounding Rules". When the difference between the parallel determination values specified in Table 3 is not exceeded, the arithmetic mean shall be used. Yuan 3
Apparent viscosity of cutting agent solution
Free monomer content
Degree of ice melting
6PIA-605 Profile Control Agent Testing Rules
Calculation of the number of digits of accuracy
Difference between parallel determination values
6.1 Each batch of products shall be qualified by the manufacturer's technical inspection and issued with a certificate of conformity before leaving the factory. The products leaving the factory shall meet the requirements of this standard and be accompanied by a quality inspection certificate. The quality inspection format is shown in Appendix A (Supplement). .6.2 The main agent factory inspection items are the various performance indicators specified in 4.2 and 4.3. 6.3 Type inspection items are the various indicators specified in 4.2 and 4.3. 6.4 Each ton is a batch, and 500g of each batch is randomly sampled for type inspection. If one item is unqualified, the sample should be thrown out for re-inspection. If the product is still unqualified after the re-inspection, the batch is judged to be unqualified. 6.5 The following situations should be subject to type inspection: once every six months during production, b. When the product is in production after a long period of suspension, c. When the raw materials and process have changed significantly, which may affect the product performance. 7 Marking, packaging, transportation and storage
7.1 The outer packaging of the product should be marked with the following content:
a. Product name
b. Batch number, net weight,
o Manufacturer name
d. Manufacturing period.
7.2 The main agent is packed in two layers of plastic bags and then put into woven bags. The net weight of each bag is 25±0.5kg. 7.3 Moisture-proof should be taken care of during transportation.
7.4 The product should be stored in a ventilated and dry place. Storage period is one year. 5
Experimental content
Screening rate of 0.9mm sieve, %
Content, %
Relative molecular weight
Degree of hydrolysis, %
Content of acrylamide, %
Interval between adhesives, d
Gel viscosity, mPa-s
Blocking rate, %
Audit:
Additional instructions:
Sy 5592—93
Appendix A
P1A-605 Profile Control Agent Product Quality Inspection Form (Supplement)
Commissioning unit,
Sample number:
Manufacturer name,
Sampling date,
Report number:
Sample collection date:
Experimental date:
Sample taker,
Bidding requirements
Free-flowing white particles or powder
3×10*~5×108
#2.0×13*
This standard is proposed and technically managed by the Oilfield Chemistry Professional Standard Promotion Technical Committee. This standard is drafted by the Oilfield Chemistry Institute of the Petroleum Exploration and Development Research Institute. The main drafter of this standard is Liao Yuan. bzxZ.net
Inspection results
Analyst:
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