CN107345950A - Oil field extracted water flocculant evaluation method - Google Patents
Oil field extracted water flocculant evaluation method Download PDFInfo
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- CN107345950A CN107345950A CN201610298417.XA CN201610298417A CN107345950A CN 107345950 A CN107345950 A CN 107345950A CN 201610298417 A CN201610298417 A CN 201610298417A CN 107345950 A CN107345950 A CN 107345950A
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Abstract
The present invention provides a kind of oil field extracted water flocculant evaluation method, and the oil field extracted water flocculant evaluation method includes：Step 1, oil-containing curve is prepared；Step 2, sample solution is prepared；Step 3, test water sample is prepared；Step 4, flocculating setting is carried out, detects oil-containing after untreated water sample oil-containing and flocculating setting；Step 5, according to the testing result of step 4, oil removal rate and suspended solid clearance are calculated.The oil field extracted water flocculant evaluation method high sensitivity, the flocculating effect that can state to visual rationing flocculant, and can make experimentation be simple and convenient to operate and reproducible.
Description
Technical field
The present invention relates to oil field development technical field, especially relates to a kind of oil field extracted water flocculant evaluation side
Method.
Background technology
Oil field extracted water is to be added from inorganic flocculating agent with organic anion type flocculating agent formulation into the aqueous solution with flocculant
Enter in oilfield sewage, make the suspended particulates loss of stability in waste water, micelle thing phase inter coagulation increases particulate, forms flocculation
Body, floccule body depart from aqueous phase precipitation under gravity after growing up to certain volume, so as to remove a large amount of suspensions in waste water
Thing, so as to reach the effect of water process.Sewage after processing substantially can reach discharge in oil content, suspension content etc.
Standard, it may be used as the reinjected water of artificial recharge oil recovery.
China National Petroleum Corporation (CNPC) once issued SY/T 5763-1995《Flocculant JX-II》, this method, which determines, to be added
Before and after entering flocculant, the change of suspended solids content in the supernatant of liquid is tested to characterize the using effect of flocculant, although energy
The measurement result of quantitative, but have the following disadvantages：
(a) experimental implementation is cumbersome, needs during strict demand to dry and weighs 4 times；
(b) when determining live oil-containing water sample, filtering is very difficult；
(c) experiment takes extremely long, and sometimes one experiment needs several days can just obtain result；
(d) because experimental procedure is more, it is more to produce the chance of error, as a result poor repeatability.
For this we have invented a kind of new oil field extracted water flocculant evaluation method, solves above technical problem.
The content of the invention
It is an object of the invention to provide a kind of high sensitivity, the flocculating effect of flocculant can be stated to visual rationing, again
Experimentation can be made to be simple and convenient to operate and reproducible oil field extracted water flocculant evaluation method.
The purpose of the present invention can be achieved by the following technical measures：Oil field extracted water flocculant evaluation method, the oil
Field recovered water flocculant evaluation method includes：Step 1, oil-containing curve is prepared；Step 2, sample solution is prepared；Step 3, prepare
Test water sample；Step 4, flocculating setting is carried out, and detects oil-containing after untreated water sample oil-containing and flocculating setting；Step 5, according to
The testing result of step 4, calculate oil removal rate and suspended solid clearance.
The purpose of the present invention can be also achieved by the following technical measures：
In step 1, making crude oil used in oil-containing curve should obtain from the corresponding petrol station in experiment scene.
In step 2, single liquid flocculant is configured to 1% aqueous solution before the test.
In step 2, when preparing bi-component flocculant, sample is liquid, and A, B agent are configured to 1% aqueous solution；Sample
For solid powder, then A agent is configured to 0.2% aqueous solution, and B agent is configured to 0.02% aqueous solution.
In step 4, when carrying out the flocculating setting of bi-component flocculant, 4 1000mL beaker is taken, with suction pipe from water sample
4 parts of 800mL water samples are drawn in middle level, are respectively charged into beaker, and are emitted on the lower section of six agitator agitating paddles, make agitating paddle inclined
From beaker center about 6mm；A agent sample solution 2.4mL are first added in two dosing test tubes, start mixer, in rotating speed 120r/
5min is quickly stirred under min, the solution in two test tubes is quickly poured into two beakers, continues quick stirring 1min, then two
B agent 0.8mL sample solutions are added in test tube, are quickly poured into two beakers, continue quick stirring 1min, two other beaker is not
Blank is done in dosing；Rotating speed is reduced to 20~60r/min, 5min is stirred, removes agitating paddle, quiescent settling 30min, be ready for containing
The detection of oil mass and suspended solids content.
In step 4, when carrying out the flocculating setting of single liquid flocculant, 4 1000mL beaker is taken, with suction pipe from water sample
Layer draws 4 parts of 800mL water samples, is respectively charged into beaker, and is emitted on the lower section of six agitator agitating paddles, deviates agitating paddle
Beaker center about 6mm, the flocculant solution 3.2mL of each addition 1%, makes adding consistency reach 40mg/ in two dosing test tubes
Blank is done in L, two other beaker not dosing；Start mixer, 5min is quickly stirred under rotating speed 120r/min；By in two test tubes
Solution be quickly poured into two beakers, continue quick stirring 1min, reduce rotating speed to 20~60r/min, stir 5min, remove
Agitating paddle, quiescent settling 30min, it is ready for the detection of oil content and suspended solids content.
In step 4, when detecting untreated water sample oil-containing, drawn with siphon pipe from the water sample middle level of two not dosings
250mL, initial 10mL is discarded, be divided into 2 groups, one of which takes about 150mL, carries out oil content detection, another group takes about
100mL, carry out suspended solids content detection.
In step 4, after detection flocculating setting during oil-containing, drawn with siphon pipe from the water sample middle level in two dosing beakers
250mL, initial 10mL is discarded, be divided into 2 groups, one of which takes about 150mL, carries out oil content detection, another group takes about
100mL, carry out suspended solids content detection.
In step 3, test water sample is sewage plant untreated sewage, should be after sample tap first discharges water 5min during water sampling
Accessed again with Plastic Drum, water sample should be deposited under the conditions of 50 DEG C~60 DEG C, be used in 24h；Test water sample oil content should be
50mg/L~200mg/L, if live crude oil should be added when being less than 50mg/L, preheated at 50 DEG C 10min with it is mixed adjust device with more than
2000r/min rotating speed emulsification 5min, the water sample after emulsification treatment is moved into 5000mL bottles, give over to experiment and use with siphonage；
Test water sample suspended solids content should be in 20mg/L~100mg/L, if should add 1~50 μm of dioxy of particle diameter when being less than 20mg/L
SiClx, the control of test water sample pH value is 6.5~8.0, not in the soda acid chemical agent adjustment of this scope.
In steps of 5, deoiling effect is calculated by formula (1)：
In formula：
X1-oil removal rate, %；
C0-untreated sewage oil content, mg/L；
Oil content of wastewater after C1-flocculating setting, mg/L.
Suspended solid clearance is calculated by formula (2)：
In formula：
X2-suspended solid clearance, %；
B0-untreated sewage suspended solids content, mg/L；
Sewage by suspended solids content, mg/L after B1-flocculating setting.
Oil field extracted water flocculant evaluation method in the present invention, according to the inspection of the mechanism of action of flocculant and early stage
Appraisal is surveyed, its technical indicator is determined, mainly includes：Suspended solid clearance, oil removal rate.Before chemical feeding quantity is 40mg/L
Put, suspended solid clearance >=50%.On the premise of chemical feeding quantity is 40mg/L, oil removal rate >=80%.
Brief description of the drawings
Fig. 1 is the flow chart of a specific embodiment of the oil field extracted water flocculant evaluation method of the present invention.
Embodiment
For enable the present invention above and other objects, features and advantages become apparent, it is cited below particularly go out preferable implementation
Example, and coordinate shown in accompanying drawing, it is described in detail below.
As shown in figure 1, Fig. 1 is the flow chart of the oil field extracted water flocculant evaluation method of the present invention.
1st, prepared by oil-containing curve
Oil-containing standard curve is drawn by the regulation of 5.4 in SY/T 5329-2012, makes crude oil Ying Congshi used in curve
Test and obtained with the corresponding petrol station in scene.
2nd, the preparation of sample solution
2.1 single liquid flocculants are configured to 1% aqueous solution before the test.
The preparation of 2.2 bi-component flocculants
A) sample is liquid, and A, B agent are configured to 1% aqueous solution；
B) sample is solid powder, then A agent is configured to 0.2% aqueous solution, and B agent is configured to 0.02% aqueous solution.
3rd, the preparation of test water sample
3.1 test water samples are sewage plant untreated sewage, again with modeling after should first discharging water 5min from sample tap during water sampling
Charging basket accesses.Water sample should be deposited under the conditions of 50 DEG C~60 DEG C, be used in 24h.
3.2 test water sample oil content should in 50mg/L~200mg/L, if live crude oil should be added when being less than 50mg/L,
10min is preheated at 50 DEG C adjusts device to emulsify 5min with the rotating speed more than 2000r/min with mixed, with siphonage by after emulsification treatment
Water sample is moved into 5000mL bottles, is given over to experiment and is used.
3.3 test water sample suspended solids contents should be in 20mg/L~100mg/L, if should add particle diameter when being less than 20mg/L
1~50 μm of silica, the control of test water sample pH value is 6.5~8.0, not in the soda acid chemical agent adjustment of this scope.
4th, flocculating setting
The flocculating setting of 4.1 single liquid flocculants
4 1000mL beaker is taken, 4 parts of 800mL water samples is drawn from water sample middle level with suction pipe, is respectively charged into beaker, and
The lower section of six agitator agitating paddles is emitted on, agitating paddle is deviateed beaker center about 6mm.Respectively added in two dosing test tubes
Blank is done in 1% flocculant solution 3.2mL (making adding consistency reach 40mg/L), two other beaker not dosing.Start stirring
Machine, 5min is quickly stirred under rotating speed 120r/min.Solution in two test tubes is quickly poured into two beakers, continuation is quickly stirred
1min is mixed, rotating speed is reduced to (20~60) r/min, stirs 5min, remove agitating paddle, quiescent settling 30min, by 4.4 regulation
Carry out the detection of oil content and suspended solids content.
The flocculating setting of 4.2 bi-component flocculants
4 1000mL beaker is taken, 4 parts of 800mL water samples is drawn from water sample middle level with suction pipe, is respectively charged into beaker, and
The lower section of six agitator agitating paddles is emitted on, agitating paddle is deviateed beaker center about 6mm.First added in two dosing test tubes
A agent sample solution (3.2.2 compound concentrations) 2.4mL, start mixer, 5min is quickly stirred under rotating speed 120r/min, by two
Solution in test tube is quickly poured into two beakers, continues quick stirring 1min, then B agent 0.8mL samples are added in two test tubes
Solution (3.2.2 compound concentrations), is quickly poured into two beakers, continues quick stirring 1min, and two other beaker not dosing is done
Blank.Rotating speed is reduced to (20~60) r/min, 5min is stirred, removes agitating paddle, quiescent settling 30min, enter by 4.4 regulation
The detection of row oil content and suspended solids content.
When the proportioning of the agent of bi-component flocculating agent A and B agent is not 3:When 1, add according to the dosing ratio of product description requirement
Medicine, total chemical feeding quantity must not exceed 40mg/L.
4.3 untreated water sample oil-containings (C0)
250mL is drawn from the water sample middle level of two not dosings with siphon pipe, initial 10mL is discarded, is divided into 2 groups, wherein one
Group takes about 150mL, carries out oil content detection by the regulation of 5.4.4 in SY/T 5329-2012, another group takes about 100mL, by SY/
5.2 regulation carries out suspended solids content detection in T 5329-2012.
Oil-containing (C1) after 4.4 flocculating settings
250mL is drawn from the water sample middle level in two dosing beakers with siphon pipe, initial 10mL is discarded, is divided into 2 groups, its
In one group take about 150mL, by SY/T 5329-2012 5.4.4 regulation carry out oil content detection, another group takes about 100mL,
Suspended solids content detection is carried out by SY/T 5329-2012 5.2 regulation.
5th, result calculates
Deoiling effect is calculated by formula (1)：
In formula：
X1-oil removal rate, %；
C0-untreated sewage oil content, mg/L；
Oil content of wastewater after C1-flocculating setting, mg/L.
Suspended solid clearance is calculated by formula (2)：
In formula：
X2-suspended solid clearance, %；
B0-untreated sewage suspended solids content, mg/L；
Sewage by suspended solids content, mg/L after B1-flocculating setting.
Claims (10)
1. oil field extracted water flocculant evaluation method, it is characterised in that the oil field extracted water flocculant evaluation method includes：
Step 1, oil-containing curve is prepared；
Step 2, sample solution is prepared；
Step 3, test water sample is prepared；
Step 4, flocculating setting is carried out, and detects oil-containing after untreated water sample oil-containing and flocculating setting；
Step 5, according to the testing result of step 4, oil removal rate and suspended solid clearance are calculated.
2. oil field extracted water according to claim 1 flocculant evaluation method, it is characterised in that in step 1, make
Crude oil used in oil-containing curve should obtain from the corresponding petrol station in experiment scene.
3. oil field extracted water according to claim 1 flocculant evaluation method, it is characterised in that in step 2, single liquid
Flocculant is configured to 1% aqueous solution before the test.
4. oil field extracted water according to claim 1 flocculant evaluation method, it is characterised in that in step 2, prepare
During bi-component flocculant, sample is liquid, and A, B agent are configured to 1% aqueous solution；Sample is solid powder, then A agent is configured to
0.2% aqueous solution, B agent are configured to 0.02% aqueous solution.
5. oil field extracted water according to claim 4 flocculant evaluation method, it is characterised in that in step 4, carry out
During the flocculating setting of bi-component flocculant, 4 1000mL beaker is taken, 4 parts of 800mL water samples are drawn from water sample middle level with suction pipe,
It is respectively charged into beaker, and is emitted on the lower section of six agitator agitating paddles, agitating paddle is deviateed beaker center about 6mm；Two
A agent sample solution 2.4mL are first added in branch dosing test tube, start mixer, 5min is quickly stirred under rotating speed 120r/min, will
Solution in two test tubes is quickly poured into two beakers, continues quick stirring 1min, then B agent 0.8mL examinations are added in two test tubes
Sample solution, it is quickly poured into two beakers, continues quick stirring 1min, blank is done in two other beaker not dosing；Reduce rotating speed
To 20~60r/min, 5min is stirred, agitating paddle is removed, quiescent settling 30min, is ready for oil content and suspended solids content
Detection.
6. oil field extracted water according to claim 1 flocculant evaluation method, it is characterised in that in step 4, carry out
During the flocculating setting of single liquid flocculant, 4 1000mL beaker is taken, 4 parts of 800mL water samples are drawn from water sample middle level with suction pipe, point
It is not fitted into beaker, and is emitted on the lower section of six agitator agitating paddles, agitating paddle is deviateed beaker center about 6mm, at two
The flocculant solution 3.2mL of each addition 1%, makes adding consistency reach 40mg/L, two other beaker not dosing in dosing test tube
Do blank；Start mixer, 5min is quickly stirred under rotating speed 120r/min；Solution in two test tubes is quickly poured into two burnings
In cup, continue quick stirring 1min, reduce rotating speed to 20~60r/min, stir 5min, remove agitating paddle, quiescent settling
30min, it is ready for the detection of oil content and suspended solids content.
7. oil field extracted water according to claim 1 flocculant evaluation method, it is characterised in that in step 4, detection
During untreated water sample oil-containing, 250mL is drawn from the water sample middle level of two not dosings with siphon pipe, initial 10mL is discarded, is divided into 2
Group, one of which take about 150mL, carry out oil content detection, and another group takes about 100mL, carries out suspended solids content detection.
8. oil field extracted water according to claim 1 flocculant evaluation method, it is characterised in that in step 4, detection
After flocculating setting during oil-containing, 250mL is drawn from the water sample middle level in two dosing beakers with siphon pipe, discards initial 10mL,
It is divided into 2 groups, one of which takes about 150mL, carries out oil content detection, and another group takes about 100mL, carries out suspended solids content inspection
Survey.
9. oil field extracted water according to claim 1 flocculant evaluation method, it is characterised in that in step 3, experiment
It is sewage plant untreated sewage with water sample, is accessed again with Plastic Drum after should first discharging water 5min from sample tap during water sampling, water sample should
Deposit under the conditions of 50 DEG C~60 DEG C, used in 24h；Test water sample oil content should be in 50mg/L~200mg/L, if being less than
Live crude oil should be added during 50mg/L, 10min is preheated at 50 DEG C and adjusts device to be emulsified with the rotating speed more than 2000r/min with mixed
5min, the water sample after emulsification treatment is moved into 5000mL bottles with siphonage, experiment is given over to and uses；Test water sample suspended solid contains
Amount should be in 20mg/L~100mg/L, if should add 1~50 μm of silica of particle diameter, test water sample pH value when being less than 20mg/L
Control is 6.5~8.0, not in the soda acid chemical agent adjustment of this scope.
10. oil field extracted water according to claim 1 flocculant evaluation method, it is characterised in that in steps of 5, remove
Oily effect is calculated by formula (1)：
<mrow>
<msub>
<mi>X</mi>
<mn>1</mn>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>C</mi>
<mn>0</mn>
</msub>
<mo>-</mo>
<msub>
<mi>C</mi>
<mn>1</mn>
</msub>
</mrow>
<msub>
<mi>C</mi>
<mn>0</mn>
</msub>
</mfrac>
<mo>&times;</mo>
<mn>100</mn>
<mo>...</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
In formula：
X1-oil removal rate, %；
C0-untreated sewage oil content, mg/L；
Oil content of wastewater after C1-flocculating setting, mg/L.
Suspended solid clearance is calculated by formula (2)：
<mrow>
<msub>
<mi>X</mi>
<mn>2</mn>
</msub>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>B</mi>
<mn>0</mn>
</msub>
<mo>-</mo>
<msub>
<mi>B</mi>
<mn>1</mn>
</msub>
</mrow>
<msub>
<mi>B</mi>
<mn>0</mn>
</msub>
</mfrac>
<mo>&times;</mo>
<mn>100</mn>
<mo>...</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
</mrow>
In formula：
X2-suspended solid clearance, %；
B0-untreated sewage suspended solids content, mg/L；
Sewage by suspended solids content, mg/L after B1-flocculating setting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610298417.XA CN107345950A (en) | 2016-05-06 | 2016-05-06 | Oil field extracted water flocculant evaluation method |
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| CN201610298417.XA CN107345950A (en) | 2016-05-06 | 2016-05-06 | Oil field extracted water flocculant evaluation method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687003A (en) * | 2018-07-04 | 2020-01-14 | 中国石油天然气股份有限公司 | Device and method for evaluating flocculation effect of flocculating agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110687003A (en) * | 2018-07-04 | 2020-01-14 | 中国石油天然气股份有限公司 | Device and method for evaluating flocculation effect of flocculating agent |
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