CN109357967B - A kind of polymer solution apparent viscosity loss method for quantitatively evaluating that oilfield sewage is prepared - Google Patents
A kind of polymer solution apparent viscosity loss method for quantitatively evaluating that oilfield sewage is prepared Download PDFInfo
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Abstract
The present invention provides a kind of polymer solution apparent viscosity loss method for quantitatively evaluating that oilfield sewage is prepared.The polymer solution apparent viscosity weight coefficient that oilfield sewage is prepared through the invention, the polymer solution apparent viscosity extent of damage, principal element, which influences plate and principal element to the polymer solution apparent viscosity extent of damage, influences plate to polymer solution apparent viscosity weight coefficient, influence degree of the sewage with each Dominated Factors in poly solution to polymer solution apparent viscosity can be evaluated, predict that sewage matches the apparent viscosity extent of damage of poly solution, and then match the preparation method of poly solution for sewage, oilfield sewage Water-quality control measure needed for sewage is kept with poly solution viscosity provides foundation.
Description
Technical field
The present invention relates to the polymer solution apparent viscosities that a kind of oilfield sewage is prepared to lose method for quantitatively evaluating, belongs to stone
Oily development field.
Background technique
Polymer flooding is one of the technical way that oil recovery factor is improved in current China oil field after water drive, keeps one
The polymer solution for determining viscosity is the prerequisite for improving polymer flooding development effectiveness.Use the oil by processing such as water-oil separatings
Field polymer solution made up by sewage (abbreviation sewage matches poly solution) is current each oil field using more manner of formulation, but is existed
Polymer solution viscosity loses larger problem.By taking Shengli Oil Field as an example, sewage averagely only has 16- with poly solution well head viscosity
40mPas, the pure water that compares are prepared, and polymer solution viscosity loss can reach 90% or more.Partial Block oil field is to reach out
The viscosity of polymer solution designed by originating party case, scene is using measures such as increasing polymer dry powder additive amounts；But it is poly- to drive cost phase
It should improve, viscosity still has larger gap compared with the polymer solution that pure water is prepared.It is prepared using processed oilfield sewage
The existing polymer oneself factor of the influence factor of polymer solution viscosity, also has environmental factor: where the mineralising in environmental factor
Degree, pH value, temperature etc. are affected.
In recent years, many scholars are studied for sewage with poly solution viscosity loss serious problems, are mainly based upon
Single factor exploration method has studied sewage with influence of the various factors to polymer solution apparent viscosity in poly solution, is confined to qualitative
Various factors is analyzed to the affecting laws of polymer solution apparent viscosity, specifies that oilfield sewage causes polymer solution viscosity to damage
Macroscopical principal element of mistake, but mainly analyzed from the variation of the apparent viscosity of polymer solution, without quantitative research difference
Factor causes Dominated Factors influence boundary of the sewage with poly solution viscosity indefinite the influence degree of polymer solution viscosity,
The influence degree of different factors is indefinite；It after all is not form a kind of polymer solution apparent viscosity loss quantitatively evaluating
Method, thus keep the directive significance of required oilfield sewage Water-quality control measure lower with poly solution viscosity in sewage.Therefore, stone
It is badly in need of a kind of solution apparent viscosity loss method for quantitatively evaluating when oilfield sewage prepared polymer solution in oily development field.
Summary of the invention
In view of the deficienciess of the prior art, the present invention provides a kind of polymer solution apparent viscosity that oilfield sewage is prepared
Lose method for quantitatively evaluating.Using method of the invention can with quantitatively evaluating sewage with each Dominated Factors in poly solution to polymer
The influence degree of solution apparent viscosity, prediction sewage matches the apparent viscosity extent of damage of poly solution, and then matches poly solution for sewage
Preparation method, sewage with poly solution viscosity keep needed for oilfield sewage Water-quality control measure provide foundation.
Term explanation:
Processed oilfield sewage: refer to the oilfield sewage by processing such as water-oil separatings.
Principal element: referring in processed oilfield sewage, influences the main component that sewage matches poly solution apparent viscosity；Wherein
Including Na+。
Specific factor: refer to and remove Na in principal element+Remaining other main components afterwards.
Technical scheme is as follows:
A kind of polymer solution apparent viscosity loss method for quantitatively evaluating that oilfield sewage is prepared, comprising steps of
(1) principal element in processed oilfield sewage is determined；The principal element includes specific factor and Na+；And
Determine the test concentrations range of every kind of principal element；
(2) calculating for the polymer solution apparent viscosity extent of damage that oilfield sewage is prepared: in the survey of every kind of principal element
It tries that principal element is configured to the aqueous solution of various concentration respectively, obtains sewage solution in concentration range；Utilize gained sewage solution
The polymer solution for preparing same concentrations respectively, measures apparent viscosity η1；Concentration same as described above is prepared using deionized water
Polymer solution measures apparent viscosity η2；Calculate apparent viscosity loss degree, i.e. apparent viscosity loss coefficient η=η1/η2；
(3) calculating for the polymer solution apparent viscosity weight coefficient that oilfield sewage is prepared:
A, within the scope of the test concentrations of every kind of principal element, principal element is configured to the water-soluble of various concentration respectively
Liquid obtains sewage solution；It prepares the polymer solution of same concentrations respectively using gained sewage solution, measures apparent viscosity；With dirt
In aqueous solution the concentration of every kind of principal element be abscissa, corresponding sewage with poly solution apparent viscosity be ordinate, draw respectively
Principal element concentration processed-polymer solution apparent viscosity change curve；
B, it according to principal element concentration in step (a)-polymer solution apparent viscosity change curve, is obtained with interpolation method
The concentration of corresponding each principal element under to same polymer solution apparent viscosity；
C, under same polymer solution apparent viscosity, gained Na+The ratio between concentration and every kind of specific factor concentration are with Na+
Weight coefficient when influence is benchmark；
(4) principal element influences the drafting of plate on the polymer solution apparent viscosity extent of damage:
The concentration of sewage solution in step (2) is normalized to 0~10, with the concentration of sewage solution after normalization for horizontal seat
The apparent viscosity loss coefficient η of polymer solution is ordinate in mark, corresponding step (2), and it is main to get arriving to draw scatter plot
Factor influences plate to the polymer solution apparent viscosity extent of damage；
(5) principal element influences the drafting of plate on polymer solution apparent viscosity weight coefficient:
The weight coefficient that step (3) obtains is normalized to 0~4, using normalized weight coefficient as ordinate, corresponding
The step of (3) c in polymer solution apparent viscosity be abscissa, draw scatter plot to get to principal element it is molten to polymer
Liquid apparent viscosity weight coefficient influences plate.
According to the present invention, in step (1), determine the principal element in processed oilfield sewage by the prior art i.e.
It can.
According to the present invention, in step (1), the principal element must include Na+, the specific factor is according to oilfield sewage
Source it is different and different, may include K+、Ca2+、Mg2+、Fe2+、Fe3+、S2-、O2, kaolin and sodium soil etc..
According to the present invention, in step (1), the test concentrations range of every kind of principal element of the determination is carried out by the prior art
?.The test concentrations range includes the minimum concentration and maximum concentration of principal element in processed oilfield sewage.
It is preferred according to the present invention, in step (2), the test concentrations range of the concentration of sewage solution in every kind of principal element
Interior value, and the sewage solution of endpoint value concentration is prepared simultaneously.
Preferred according to the present invention, in step (2), the concentration of the polymer solution is 2000mg/L.
According to the present invention, step (2), in (3), the polymer in the polymer solution is the common polymerization of polymer flooding
Object, by the prior art, commercially available acquisition.
Preferred according to the present invention, in step (2), polymer solution apparent viscosity extent of damage evaluation index is as follows:
As η > 1.0, the negative loss of polymer solution apparent viscosity；
As η=1.0, polymer solution apparent viscosity zero is lost；
As 0.8≤η < 1.0, the low loss of polymer solution apparent viscosity；
As 0.6≤η < 0.8, lost in polymer solution apparent viscosity；
As 0.4≤η < 0.6, the loss of polymer solution apparent viscosity height；
As η < 0.4, the loss of polymer solution apparent viscosity superelevation.
It is preferred according to the present invention, in step (3) a, the test concentrations model of the concentration of sewage solution in every kind of principal element
Interior value is enclosed, and prepares the sewage solution of endpoint value concentration simultaneously.
Preferred according to the present invention, in step (3) a, the concentration of the polymer solution is 2000mg/L.
It is preferred according to the present invention, in step (2), (3), the measurement of apparent viscosity be using rotational rheometer at room temperature
It is measured, shear rate 7.34s-1。
According to the present invention, in step (3) a, the principal element concentration-polymer solution apparent viscosity change curve is
Line chart is connected between adjacent scatterplot with straight line.
According to the present invention, in step (3) b, the interpolation method refers to the value of determining ordinate apparent viscosity, brings song into
Line chart obtains the corresponding abscissa i.e. concentration of principal element.
According to the present invention, in step (3) c, weight coefficient is with Na+It is because of principal element concentration phase on the basis of influence
Meanwhile apparent viscosity influence of the sodium ion on sewage with poly solution is smaller；In addition, sodium ion is there will necessarily be in oilfield sewage
Factor.
According to the present invention, method for normalizing described in step (4) is carried out by the prior art.
It is preferred according to the present invention, in step (5), weight coefficient is carried out to take logarithm process, normalizes weight coefficient
It is 0~4.
The apparent viscosity extent of damage and principal element of the present invention are to polymer solution apparent viscosity extent of damage influence diagram
Version, can each principal element of quantization signifying to the influence degree of polymer solution apparent viscosity；Apparent viscosity weight coefficient of the present invention
And principal element influences plate to polymer solution apparent viscosity weight coefficient, can quantization signifying it is each for sodium ion
Principal element to the size of polymer solution apparent viscosity influence degree, while using two parameter can comprehensive quantification characterization oil field it is dirty
Influence degree of each principal element to apparent viscosity of polymer in water.
The utility model has the advantages that
(1) the present invention provides a kind of polymer solution apparent viscosity extent of damage evaluation index, previous sewage is breached
It evaluates and limits to poly solution apparent viscosity, it can influence of the identical principal element of comparative evaluation to different polymer solution apparent viscosities
Degree, can evaluation of classification difference principal element influence the variation degree of polymer solution apparent viscosity, and then it is poly- for quantitatively evaluating
Polymer solution apparent viscosity changing rule provides foundation.
(2) the present invention provides the weight coefficient calculating sides that a kind of different principal elements influence polymer solution apparent viscosity
Method, breaching previously used viscosity value comparison qualitative evaluation difference principal element influences the office of polymer solution apparent viscosity
Limit the quantitative contrast, it can be achieved that different principal element influence degrees.
(3) the present invention provides a kind of different principal elements influence polymer solution apparent viscosity extent of damage plates and its
Method for drafting, to polymer solution apparent viscosity when can be intuitively displayed different principal element various concentration ranges using the plate
Influence degree, to predict that the apparent viscosity of polymer solution that known oilfield sewage composition is prepared provides foundation.
(4) the present invention provides a kind of different principal elements influence polymer solution apparent viscosity weight coefficient plates and its
It is big to the influence degree of polymer solution apparent viscosity can intuitively to compare different principal elements using the plate for method for drafting
It is small, to differentiate the Dominated Factors of influence, it can be ranked up, according to influence degree size and treatment cost height, really
The fixed Dominated Factors preferentially administered and its limit administered are (between the holding and improvement economic cost of polymer solution viscosity
Binding site), provide foundation to determine that oilfield sewage administers object and limit.
(5) apparent viscosity weight coefficient plate of the present invention is mainly used for intuitively quantifying to compare between different principal elements to poly-
The influence degree size of polymer solution apparent viscosity mainly emphasizes " comparison between principal element influence "；Apparent viscosity loss
Degree plate is mainly used for intuitive quantitative research difference principal element to the influence degree of polymer solution apparent viscosity, mainly by force
It adjusts " principal element influence ".Thus the two emphasizes particularly on different fields, and should be used in combination.Polymer solution apparent viscosity loss amount of the invention
The advantages of changing evaluation method, having both " principle is concise, easy to implement the method, result is quantitative " is professional person in particular layman
Differentiate that influence of the different factors to polymer solution apparent viscosity provides convenience.
Detailed description of the invention
Fig. 1 is Na ion concentration-polymer solution apparent viscosity change curve in the embodiment of the present invention；
Fig. 2 is potassium concentration-polymer solution apparent viscosity change curve in the embodiment of the present invention；
Fig. 3 is calcium ion concentration-polymer solution apparent viscosity change curve in the embodiment of the present invention；
Fig. 4 is magnesium ion concentration-polymer solution apparent viscosity change curve in the embodiment of the present invention；
Fig. 5 is ferrous ion concentration-polymer solution apparent viscosity change curve in the embodiment of the present invention；
Fig. 6 is ferric ion concentration-polymer solution apparent viscosity change curve in the embodiment of the present invention；
Fig. 7 is sulfidion concentration-polymer solution apparent viscosity change curve in the embodiment of the present invention；
Fig. 8 is dissolved oxygen concentration-polymer solution apparent viscosity change curve in the embodiment of the present invention；
Fig. 9 is kaolin concentration-polymer solution apparent viscosity change curve in the embodiment of the present invention；
Figure 10 is sodium soil concentration-polymer solution apparent viscosity change curve in the embodiment of the present invention；
Figure 11 is the plate that principal element influences the polymer solution apparent viscosity extent of damage in the embodiment of the present invention；
Figure 12 is the plate that principal element influences polymer solution apparent viscosity weight coefficient in the embodiment of the present invention.
Specific embodiment
Below by specific embodiments and the drawings, the present invention will be further described, but not limited to this.
Raw materials used in embodiment is conventional raw material, commercially available acquisition；The method is routine unless otherwise specified
Method, the prior art.
Polymer used in the following embodiment is partially hydrolyzed polyacrylamide (PHPA), relative molecular mass 18,000,000, hydrolysis
Degree 18~20%, solid content 94wt%, Shandong Polymer Bio-Chemicals Co., Ltd. are on sale.
In embodiment, apparent viscosity is to utilize rotational rheometer, at room temperature, shear rate 7.34s-1Under the conditions of measure
's.
Embodiment
A kind of polymer solution apparent viscosity loss method for quantitatively evaluating that oilfield sewage is prepared, comprising steps of
(1) complete water quality analysis is carried out to the different oil reservoir produced liquid of Shengli Oil Field using the prior art, obtains processed oil
Principal element in the sewage of field includes Na+、K+、Ca2+、Mg2+、Fe2+、Fe3+、S2-、O2, kaolin, sodium soil；Determine every kind it is main
The test concentrations range of factor determines the dense of each principal element in oilfield sewage according to oil field and method or technique commonly used in the trade
Degree, then using the respective maximum concentration of each principal element (being reduced to integer value) as the maximum concentration of test concentrations range, really
Protect the concentration that test concentrations range includes principal element in practical oilfield sewage.The test concentrations range such as table of every kind of principal element
Shown in 1.
The different principal element test concentrations ranges of table 1
(2) calculating and evaluation index for the polymer solution apparent viscosity extent of damage that oilfield sewage is prepared: in every kind of master
It wants within the scope of the test concentrations of factor, principal element is configured to the aqueous solution of various concentration respectively, obtain sewage solution；Using institute
The polymer solution that sewage solution difference compound concentration is 2000mg/L is obtained, measures apparent viscosity η with rotational rheometer1；It utilizes
Deionized water compound concentration is the polymer solution of 2000mg/L, measures apparent viscosity η with rotational rheometer2For 215mPas；
Calculate apparent viscosity loss degree, i.e. apparent viscosity loss coefficient η=η1/η2；
Polymer solution apparent viscosity extent of damage evaluation index is as follows:
As η > 1.0, the negative loss of polymer solution apparent viscosity；
As η=1.0, polymer solution apparent viscosity zero is lost；
As 0.8≤η < 1.0, the low loss of polymer solution apparent viscosity；
As 0.6≤η < 0.8, lost in polymer solution apparent viscosity；
As 0.4≤η < 0.6, the loss of polymer solution apparent viscosity height；
As η < 0.4, the loss of polymer solution apparent viscosity superelevation.
Test result is as shown in table 2-6.
Table 2Na+And K+Influence degree
Data are shown in table 2, Na+And K+It is close to the influence degree of polymer solution apparent viscosity, when the two concentration reaches
When 8000mg/L, the apparent viscosity of prepared polymer solution is in superelevation loss region.
Table 3Ca2+And Mg2+Influence degree
Data are shown in table 3, Ca2+And Mg2+It is close to the influence degree of polymer solution apparent viscosity, when the two concentration
When reaching 300mg/L, the apparent viscosity of prepared polymer solution is in superelevation loss region.
Table 4Fe2+、Fe3+And S2Influence degree
Data are shown in table 4, Fe2+When concentration reaches 4mg/L, polymer solution apparent viscosity influence degree is entered super
Height loss region；Relative to Fe2+For, Fe3+Influence is smaller, when concentration reaches 10mg/L, to polymer solution apparent viscosity
Influence degree is still in middle loss region；S2Influence it is also larger, when its concentration reaches 5mg/L, to polymer solution table
It sees viscosity influence degree and enters superelevation loss region.
Table 5O2Influence degree
Data are shown in table 5, when dissolving O in sewage2When concentration is lower than 10mg/L, to polymer solution apparent viscosity
Influence degree is smaller, as dissolution O2When concentration reaches 16mg/L, the apparent viscosity of prepared polymer solution is in superelevation loss area
Domain.
The influence degree of 6 kaolin of table and sodium soil
Data are shown in table 6, and the kaolin and sodium soil in sewage influence very little to the apparent viscosity of polymer solution, when two
When person's concentration reaches 200mg/L, polymer solution apparent viscosity is in low extent of damage region.
(3) calculating for the polymer solution apparent viscosity weight coefficient that oilfield sewage is prepared:
A, within the scope of the test concentrations of every kind of principal element, every kind of principal element is configured to the water of various concentration respectively
Solution obtains sewage solution (value of every kind of principal element concentration is as shown in table 2-6 in sewage solution)；Utilize gained sewage solution
The polymer solution for preparing 2000mg/L respectively measures apparent viscosity with rotational rheometer；Concentration with every kind of principal element is
Abscissa, corresponding polymer solution apparent viscosity are ordinate, draw every kind of principal element concentration-polymer solution table respectively
Viscosity change curve graph is seen, the curve graph is line chart, is connected between adjacent scatterplot with straight line, as shown in Figures 1 to 10；
B, according to every kind of principal element concentration-polymer solution apparent viscosity change curve in step (a), with interpolation
Method respectively obtains corresponding when polymer solution apparent viscosity is respectively 40,60,80,100,120,140,160,180,200mPa.s
Each principal element concentration, the results are shown in Table 7.
The concentration of corresponding difference principal element under 7 same polymer solution apparent viscosity of table
C, under same polymer solution apparent viscosity, gained Na+The ratio between concentration and every kind of specific factor concentration are with Na+
Weight coefficient when influence is benchmark；
The weight coefficient of polymer solution apparent viscosity under the different principal elements of table 8
Illustrate: the experimental results showed that, the K of same concentrations+And Na+It is close to the influence degree of apparent viscosity of polymer, weight
Coefficient differentials think that the two weight coefficient is all 1 less than 0.007, therefore in the present invention.
(4) principal element influences the drafting of plate on the polymer solution apparent viscosity extent of damage:
The concentration of sewage solution in step (2) is normalized to 0~10 respectively, normalizes result as shown in table 9 to table 14.
Table 9Na+And K+The normalized of concentration
Table 10Ca2+And Mg2+The normalized of concentration
Table 11Fe2+And Fe3+The normalized of concentration
Table 12O2The normalized of concentration
Table 13S2-The normalized of concentration
The normalized of 14 kaolin of table and sodium soil concentration
With normalize after sewage solution concentration 0~10 be abscissa, polymer solution in corresponding step (2)
Apparent viscosity loss coefficient η is ordinate, draws scatter plot to get to principal element and loses journey to polymer solution apparent viscosity
Degree influences plate, as shown in figure 11；
The figure can be intuitively displayed influence of the sewage of different factor various concentration ranges to polymer solution apparent viscosity
Degree provides foundation for known oilfield sewage predicted composition apparent viscosity of polymer；
(5) principal element influences the drafting of plate on polymer solution apparent viscosity weight coefficient:
The weight coefficient that step (3) is obtained carries out logarithm process, i.e. lg (weight coefficient) is normalized to 0~4, normalizing
It is as shown in Table 15 to change result.
The weight coefficient of polymer solution apparent viscosity normalizes result under the different principal elements of table 15
It is horizontal using normalized weight coefficient as the apparent viscosity of polymer solution in ordinate, corresponding step (3) c
Coordinate, drawing scatter plot to get to principal element influences plate to polymer solution apparent viscosity weight coefficient, such as Figure 12 institute
Show.
The figure can intuitively compare different factors to the influence degree size of polymer solution apparent viscosity, and differentiating influences master
Control factor, to determine that oilfield sewage administers object and limit provides foundation.
It is apparent to polymer solution in combination with the viscosity loss coefficient in table 2-6, the weight coefficient in table 8, principal element
Viscosity loss degree, which influences plate and principal element, influences plate comprehensive characterization to polymer solution apparent viscosity weight coefficient
Influence degree of each principal element to Polymer Solution Viscosity in oilfield sewage.
Claims (8)
1. the polymer solution apparent viscosity that a kind of oilfield sewage is prepared loses method for quantitatively evaluating, comprising steps of
(1) principal element in processed oilfield sewage is determined；The principal element includes specific factor and Na+；And it determines every
The test concentrations range of kind principal element；
Wherein, principal element refers to: in processed oilfield sewage, influencing the main component that sewage matches poly solution apparent viscosity；
Including Na+；
Specific factor refers to: Na is removed in principal element+Remaining other main components afterwards；
(2) calculating for the polymer solution apparent viscosity extent of damage that oilfield sewage is prepared: dense in the test of every kind of principal element
It spends in range, principal element is configured to the aqueous solution of various concentration respectively, obtains sewage solution；Distinguished using gained sewage solution
The polymer solution for preparing same concentrations obtains polymer solution made up by sewage, measures apparent viscosity η1；It is prepared using deionized water
With the polymer solution of above-mentioned polymer solution made up by sewage same concentrations, apparent viscosity η is measured2；Calculate apparent viscosity loss
Degree, i.e. apparent viscosity loss coefficient η=η1/η2；
(3) calculating for the polymer solution apparent viscosity weight coefficient that oilfield sewage is prepared:
A, within the scope of the test concentrations of every kind of principal element, principal element is configured to the aqueous solution of various concentration respectively, is obtained
Sewage solution；It prepares the polymer solution of same concentrations respectively using gained sewage solution, measures apparent viscosity；With sewage solution
In the concentration of every kind of principal element be abscissa, corresponding sewage with poly solution apparent viscosity be ordinate, draw respectively main
Factor concentration-polymer solution apparent viscosity change curve；
B, according to principal element concentration in step (a)-polymer solution apparent viscosity change curve, phase is obtained with interpolation method
With the concentration of each principal element corresponding under apparent viscosity；
C, under identical apparent viscosity, gained Na+The ratio between concentration and every kind of specific factor concentration are with Na+When influence is benchmark
Weight coefficient；
(4) principal element influences the drafting of plate on the polymer solution apparent viscosity extent of damage:
The concentration of sewage solution in step (2) is normalized to 0~10, using normalize after sewage solution concentration as abscissa,
In corresponding step (2) the apparent viscosity loss coefficient η of polymer solution be ordinate, draw scatter plot to get to it is main because
Element influences plate to the polymer solution apparent viscosity extent of damage；
(5) principal element influences the drafting of plate on polymer solution apparent viscosity weight coefficient:
The weight coefficient that step (3) obtains is normalized to 0~4, using normalized weight coefficient as ordinate, corresponding step
Suddenly the apparent viscosity of polymer solution is abscissa in (3) c, draws scatter plot to get principal element is arrived to polymer solution table
Seeing viscosity weight coefficient influences plate.
2. the polymer solution apparent viscosity that oilfield sewage according to claim 1 is prepared loses method for quantitatively evaluating,
It is characterized in that, in step (2), the concentration of sewage solution value within the scope of the test concentrations of every kind of principal element, and match simultaneously
The sewage solution of endpoint value concentration processed.
3. the polymer solution apparent viscosity that oilfield sewage according to claim 1 is prepared loses method for quantitatively evaluating,
It is characterized in that, in step (2), the concentration of the polymer solution is 2000mg/L.
4. the polymer solution apparent viscosity that oilfield sewage according to claim 1 is prepared loses method for quantitatively evaluating,
It is characterized in that, in step (2), polymer solution apparent viscosity extent of damage evaluation index is as follows:
As η > 1.0, the negative loss of polymer solution apparent viscosity；
As η=1.0, polymer solution apparent viscosity zero is lost；
As 0.8≤η < 1.0, the low loss of polymer solution apparent viscosity；
As 0.6≤η < 0.8, lost in polymer solution apparent viscosity；
As 0.4≤η < 0.6, the loss of polymer solution apparent viscosity height；
As η < 0.4, the loss of polymer solution apparent viscosity superelevation.
5. the polymer solution apparent viscosity that oilfield sewage according to claim 1 is prepared loses method for quantitatively evaluating,
It is characterized in that, in step (3) a, the concentration of sewage solution value within the scope of the test concentrations of every kind of principal element, and match simultaneously
The sewage solution of endpoint value concentration processed.
6. the polymer solution apparent viscosity that oilfield sewage according to claim 1 is prepared loses method for quantitatively evaluating,
It is characterized in that, in step (3) a, the concentration of the polymer solution is 2000mg/L.
7. the polymer solution apparent viscosity that oilfield sewage according to claim 1 is prepared loses method for quantitatively evaluating,
It is characterized in that, in step (2), (3), the measurement of apparent viscosity is measured at room temperature using rotational rheometer, shearing speed
Rate is 7.34s-1。
8. the polymer solution apparent viscosity that oilfield sewage according to claim 1 is prepared loses method for quantitatively evaluating,
It is characterized in that, in step (5), weight coefficient is carried out to take logarithm process, weight coefficient is made to be normalized to 0~4.
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