CN105716996A - Technological parameter determined evaluation system for dissolution of flooding polymers in pipeline - Google Patents
Technological parameter determined evaluation system for dissolution of flooding polymers in pipeline Download PDFInfo
- Publication number
- CN105716996A CN105716996A CN201610231787.1A CN201610231787A CN105716996A CN 105716996 A CN105716996 A CN 105716996A CN 201610231787 A CN201610231787 A CN 201610231787A CN 105716996 A CN105716996 A CN 105716996A
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- flooding polymers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
Abstract
The invention belongs to the technical field of oil field polymer injection and provides an evaluation system for dissolution of flooding polymers in a pipeline to evaluate dissolution effect, physical and chemical indexes and the like of dry polymer powder. The evaluation system comprises a first valve, a static mixer, a flow velocity controller, a buffer tank, a screw pump and a second valve, wherein an inlet of the first valve is connected with a pipeline for conveying a to-be-evaluated target liquid, and an outlet of the first valve is connected with the second valve and the static mixer; the static mixer, the flow velocity controller, the buffer tank, the screw pump and the second valve are sequentially connected to form a circulating pipeline, the circulating pipeline is provided with a branch pipeline, a liquid drain valve is arranged on the branch pipeline, an outlet of the liquid drain valve is connected with a waste liquid tank, and a circulating valve and a plurality of sampling ports are also arranged on the circulating pipeline. The system for evaluating the dissolution effect and physical and chemical indexes of the polymers can simulate on-site environmental parameters of oil fields to evaluate the polymers and provide reliable technical support for selection of proper polymers in different oil fields.
Description
Technical field
The invention belongs to the technical field of oilfield injection, be specifically related to molten result appraisal system in a kind of flooding polymers pipeline.
Background technology
Oil recovery technique includes primary oil recovery technology, secondary oil recovery technology and tertiary oil recovery technology, wherein, tertiary oil recovery technology refers to by injecting new oil displacement agent, change the physicochemical properties such as the viscosity of fluid, combination and phase, expand injection scope and volume, make scattered residual oil reassemble and collected out, thus increasing substantially the technology of oil recovery factor.Polymer displacement of reservoir oil is the one of tertiary oil recovery technology, and polymer displacement of reservoir oil refers to add water soluble polymer to and injects in water to improve the viscosity injecting water, improves water-oil mobility ratio, improves sweep efficiency and microscopic oil displacement efficiency, thus the method improving oil recovery factor.Using polymer displacement of reservoir oil, first have to the solution of configuration polymer dry powder, configuration step includes: the interpolation of (1) polymer dry powder；(2) dispersion of polymer dry powder moistens, and is scattered in water by polymer dry powder and forms polymer mother liquor；(3) ripening of polymer mother liquor, ripening is that polymer dry powder fully dissolves in water, to obtain the process of the satisfactory mother solution of physical and chemical index；(4) transferring of polymer mother liquor is filtered and storage.After polymer mother liquor has configured, then by liquid for the purpose of polymer mother liquor dilution, this purpose liquid enters injection well through single well pipeline.
Above-mentioned maturing process ensure that polymer dry powder dissolving in water meets the requirements, but there is a kind of novel polymer at present, the process configuring the solution of this polymer eliminates the step of ripening, but whether the polymer solution of configuration meets requirement after saving maturation stage, whether such as solute effect, physical and chemical index etc. be qualified, it is necessary to goes inspection so that structure adaptability effect, physical and chemical index etc. to be evaluated.
Summary of the invention
In order to the solute effect of polymer dry powder, physical and chemical index etc. are evaluated, the present invention proposes molten result appraisal system in a kind of flooding polymers pipeline, including the first valve, static mixer, flow speed controller, surge tank, screw pump and the second valve；The pipeline of the purpose liquid that the entrance of described first valve is to be evaluated with conveying is connected, and the outlet of this first valve is connected with described second valve, described static mixer respectively；Described static mixer, described flow speed controller, described surge tank, described screw pump and described second valve are sequentially connected with composition circulation line, this circulation line is provided with branch line, described branch line is provided with draining valve, the outlet of described draining valve is connected to waste liquid tank, being additionally provided with air bleeding valve, circulation valve and several sample taps on described circulation line, described circulation valve is between the entrance of described branch line and described surge tank.
Wherein, also including automatic control unit, this automatic control unit includes PLC and host computer, described PLC and described host computer and connects；Described first valve and described second valve are electrodynamic valve, and described flow speed controller is electromagnetic flowmeter, and described first valve, described second valve and described flow speed controller are all connected with described PLC.
Wherein, described circulation line is provided with several pressure transmitters, and this pressure transmitter is connected with described PLC.
Wherein, being provided with temperature transmitter in described surge tank, this temperature transmitter is connected with described PLC.
Wherein, being provided with fluid level transmitter in described surge tank, this fluid level transmitter is connected with described PLC.
Wherein, described circulation line is additionally provided with visor.
Wherein, described sample tap is three sample taps.
Wherein, in described surge tank, described waste liquid tank and described flooding polymers pipeline, the pipeline of molten result appraisal system all adopts 316L rustless steel to make.
In flooding polymers pipeline of the present invention, molten result appraisal system has following beneficial effect:
The flow speed controller of the evaluation system of the present invention can control the flow velocity of purpose liquid, notes conflux speed with simulation oil field, and by being different value by the flow speed control of purpose liquid, it is possible to simulation difference oilfield conditions；Purpose liquid circulates in the circulation line of the present invention, flow velocity according to purpose liquid and flowing time can calculate the flow distance of purpose liquid, the flow distance of purpose liquid in collecting process is noted with simulation oil field, the evaluation system of the present invention is by simulating the flow distance of purpose liquid in actual oilfield injection flow velocity and oilfield injection process, realize structure adaptability effect, physical and chemical index etc. are evaluated, namely simulation oil field site environment parameter can carry out evaluation of polymer.For the polymer newly researched and developed, the evaluation system that can utilize the present invention is evaluated, to check whether these structure adaptability effect, physical and chemical index etc. meet requirement, if being unsatisfactory for requirement, the experimental data that evaluation system according to the present invention provides, it is possible to the formula and processing technology of polymer is made further improvements.The evaluation system of the present invention can also simulate different oilfield conditions, selects applicable polymer to provide reliable technical support for different oil fields.The evaluation system of the present invention can be applied to scene, the evaluation system that poly-for note on-the-spot purpose liquid accesses the present invention just can be evaluated.
The evaluation system of the present invention realizes Automated condtrol by PLC, and a key operation decreases the expenditure of manpower, makes the evaluation system of the present invention run more stable safer, and the stability of experimental data obtains guarantee.The flow speed controller of the present invention and and screw pump automatically control each through PLC, make purpose liquid flow in pipeline evenly, be greatly improved the reliability evaluating system experimentation data of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of molten result appraisal system in flooding polymers pipeline of the present invention；
Fig. 2 is the structural representation of the automatic control unit of molten result appraisal system in flooding polymers pipeline of the present invention.
Detailed description of the invention
Technical scheme is introduced below in conjunction with accompanying drawing.
As it is shown in figure 1, molten result appraisal system includes the first valve 10, static mixer 12, flow speed controller 13, surge tank 21, screw pump 24 and the second valve 11 in flooding polymers pipeline of the present invention.The pipeline of the purpose liquid that the entrance of the first valve 10 is to be evaluated with conveying is connected, and the outlet of this first valve 10 is connected with the second valve 11, static mixer 12 respectively, and static mixer 12 refers to static mixer, is a kind of high-efficiency mixing device not having moving component.Static mixer 12, flow speed controller 13, surge tank 21, screw pump 24 and the second valve 11 are sequentially connected with composition circulation line, this circulation line is provided with branch line, this branch line is provided with draining valve 18, the outlet of draining valve 18 is connected to waste liquid tank 20, being additionally provided with visor 16, air bleeding valve 19, circulation valve 17 and several sample taps 15 on circulation line, circulation valve 17 is between the entrance of branch line and surge tank 21.During use, purpose liquid to be evaluated circulates in circulation line, and the flow velocity of flow speed controller 13 liquid for control purposes can observe the flowing in circulation line of the purpose liquid and dissolving situation by visor 16.
As shown in Figure 2, in flooding polymers pipeline of the present invention, molten result appraisal system also includes automatic control unit, this automatic control unit includes PLC (ProgrammableLogicController, programmable logic controller (PLC)) controller 26 and host computer 25, PLC 26 and host computer 25 connect.Preferably, first valve 10 and the second valve 11 are electrodynamic valve, flow speed controller 13 is electromagnetic flowmeter, first valve the 10, second valve 11 and flow speed controller 13 are all connected with PLC 26, so just first valve the 10, second valve 11 and flow speed controller 13 can be controlled by PLC 26, control the first valve 10 and the second valve 11 is open or close state just to control the break-make of respective line, flow speed controller 13 1 aspect can the flow of purpose liquid in signal piping, on the other hand can also the flow velocity of purpose liquid in control piper.
As shown in Figure 1-2, preferably, the circulation line of the present invention is provided with several pressure transmitters 14, this pressure transmitter 14 is connected with PLC 26, pressure transmitter 14 is for detecting the pressure in circulation line, and the pressure information detected is sent to PLC 26, the pressure information received is sent to host computer 25 by PLC 26.Surge tank 21 is provided with temperature transmitter 22 and fluid level transmitter 23, temperature transmitter 22 and fluid level transmitter 23 are all connected with PLC 26, temperature transmitter 22 is for detecting the temperature of purpose liquid in surge tank 21 and the temperature information detected being sent to PLC 26, and fluid level transmitter 23 is for detecting the liquid level of purpose liquid in surge tank 21 and the liquid level information detected being sent to PLC 26.Screw pump 24 is connected with PLC 26 by converter 27, and such PLC 26 just can control screw pump 24.
As shown in Figure 1, it is described below in flooding polymers pipeline of the present invention the work process of molten result appraisal system, the first step, close draining valve 18 and the second valve 11, open circulation valve 17, air bleeding valve 19 and the first valve 10, purpose liquid enters the evaluation system of the present invention, and the effect of air bleeding valve 19 is the gas in the circulation line of the eliminating present invention, so that the circulation line of the present invention is full of purpose liquid.
Second step, the purpose liquid of the evaluation system flowing into the present invention first passes through static mixer 12, static mixer 12 can mixed polymer dry powder and water further, polymer dry powder is made to mix evenly with water, purpose liquid is made to form current stabilization in pipeline, be conducive to the follow-up sampling to purpose liquid, improve the accuracy of the evaluation system of the present invention；By the flow velocity of purpose liquid in flow speed controller 13 control piper, can be oilfield injection flow velocity by the flow speed control of purpose liquid on the one hand, thus can simulate the oilfield injection environment of reality；During different oilfield injection, the flow velocity of purpose liquid is also different on the other hand, and the value that the flow speed control of purpose liquid is different just can be simulated the condition in different oil field.Purpose liquid stream flows in surge tank 21 after flow speed controller 13, visor 16 and circulation valve 17, and operator can observe the flowing in circulation line of the purpose liquid and dissolving situation by visor 16.
3rd step, detect the liquid level of purpose liquid in surge tank 21 by fluid level transmitter 23, after purpose liquid reaches setting liquid level, close air bleeding valve 19 and the first valve 10, open the second valve 11 and screw pump 24, the process of this step can pass through PLC 26 automatically control realization；Thered is provided power, purpose liquid to begin in the circulation line of static mixer 12, flow speed controller 13, surge tank 21, screw pump 24 and the second valve 11 composition by screw pump 24 to circulate.Wherein, purpose liquid restarts screw pump 24 after reaching setting liquid level, is so prevented from screw pump 24 and is evacuated, and plays the effect of protection screw pump 24.Open the sample tap 15 on circulation line just can purpose liquid be sampled, the number of sample tap 15 and the position of setting can be determined according to the actual requirements, such as, when reality notes in collecting process the down-hole being purpose liquid injects 1000m, that is accomplished by understanding purpose liquid solute effect after flowing 1000m, whether physical and chemical indexs etc. meet the requirements, in the circulation line of the present invention, the flow velocity of purpose liquid (is arranged by above-mentioned second step, the flow velocity of purpose liquid is the flow velocity simulating actual oilfield injection) it is known, the time of the evaluation system that purpose liquid enters the present invention is also known, so distance (1000m) according to the flow velocity of purpose liquid and flowing, the flowing time that purpose liquid needs can be calculated, thus sample tap 15 can be set an ad-hoc location in the circulation line of the present invention, so that after the flowing time through needing, purpose liquid flow to sample tap 15 place, and the distance that purpose liquid stream moves is 1000m.When using the evaluation system of the present invention, enter the evaluation system of the present invention from purpose liquid stream, after the flowing time needed, operator sample at sample tap 15 place, can be obtained by the sample of the dynamic 1000m of purpose liquid stream, whether then the purpose liquid sample of taking-up is delivered to inspection center by operator, to check the solute effect of polymer dry powder, physical and chemical index etc. qualified.Sample tap 15 can certainly be set in the position of purpose liquid stream dynamic 800m or 500m, so can obtain more data about the solute effect of polymer dry powder, physical and chemical index, more understanding is had with the course of dissolution to polymer dry powder, particularly when the solute effect of purpose liquid sample, physical and chemical index etc. are defective, the sample data of 800m or 500m can provide data foundation for the formula or production technology improving polymer dry powder.Pressure transmitter 14 and temperature transmitter 22 can detect the pressure and temperature in circulation line in real time, and the evaluation for structure adaptability effect, physical and chemical index etc. provides more data support.
4th step, after experiment terminates, closes circulation valve 17, opens draining valve 18, and purpose liquid stream enters in waste liquid tank 20.
Preferably, sample tap 15 is three sample taps, with the different pipe positions in pipeline, purpose liquid is sampled, such as sample in the center of pipeline, in 1/2nd places sampling of pipeline radius, because the flow velocity of different pipe position places purpose liquid is likely to variant in pipeline, structure adaptability situation can be influenced by impact, at different pipe position places, purpose liquid is sampled, it is possible to understand the dissolving situation of polymer dry powder more comprehensively.In surge tank 21, waste liquid tank 20 and flooding polymers pipeline, the pipeline of molten result appraisal system all adopts 316L rustless steel to make, and 316L rustless steel corrosion resistance is extremely strong, it is possible to the service life of extension device.
The evaluation system of the present invention is used not only for structure adaptability effect, physical and chemical index evaluation, can also Surfactant, acidulant, antibacterial, expansion-resisting agents etc. by directly dissolving or disperseing the material injecting oil reservoir to carry out testing and testing in pipeline, so that it to be evaluated.
Claims (8)
1. molten result appraisal system in a flooding polymers pipeline, it is characterised in that include the first valve, static mixer, flow speed controller, surge tank, screw pump and the second valve；The pipeline of the purpose liquid that the entrance of described first valve is to be evaluated with conveying is connected, and the outlet of this first valve is connected with described second valve, described static mixer respectively；Described static mixer, described flow speed controller, described surge tank, described screw pump and described second valve are sequentially connected with composition circulation line, this circulation line is provided with branch line, described branch line is provided with draining valve, the outlet of described draining valve is connected to waste liquid tank, being additionally provided with air bleeding valve, circulation valve and several sample taps on described circulation line, described circulation valve is between the entrance of described branch line and described surge tank.
2. molten result appraisal system in flooding polymers pipeline according to claim 1, it is characterised in that also include automatic control unit, this automatic control unit includes PLC and host computer, described PLC and described host computer and connects；Described first valve and described second valve are electrodynamic valve, and described flow speed controller is electromagnetic flowmeter, and described first valve, described second valve and described flow speed controller are all connected with described PLC.
3. molten result appraisal system in flooding polymers pipeline according to claim 2, it is characterised in that described circulation line is provided with several pressure transmitters, and this pressure transmitter is connected with described PLC.
4. molten result appraisal system in the flooding polymers pipeline according to Claims 2 or 3, it is characterised in that being provided with temperature transmitter in described surge tank, this temperature transmitter is connected with described PLC.
5. molten result appraisal system in the flooding polymers pipeline according to Claims 2 or 3, it is characterised in that being provided with fluid level transmitter in described surge tank, this fluid level transmitter is connected with described PLC.
6. molten result appraisal system in the flooding polymers pipeline according to any one of claim 1-3, it is characterised in that be additionally provided with visor on described circulation line.
7. molten result appraisal system in the flooding polymers pipeline according to any one of claim 1-3, it is characterised in that described sample tap is three sample taps.
8. molten result appraisal system in the flooding polymers pipeline according to any one of claim 1-3, it is characterised in that in described surge tank, described waste liquid tank and described flooding polymers pipeline, the pipeline of molten result appraisal system all adopts 316L rustless steel to make.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610231787.1A CN105716996A (en) | 2016-04-14 | 2016-04-14 | Technological parameter determined evaluation system for dissolution of flooding polymers in pipeline |
| PCT/CN2016/079951 WO2017177476A1 (en) | 2016-04-14 | 2016-04-22 | Evaluation system for determining technological parameters for dissolving of oil-displacing polymer in pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610231787.1A CN105716996A (en) | 2016-04-14 | 2016-04-14 | Technological parameter determined evaluation system for dissolution of flooding polymers in pipeline |
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| CN105716996A true CN105716996A (en) | 2016-06-29 |
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| CN201610231787.1A Pending CN105716996A (en) | 2016-04-14 | 2016-04-14 | Technological parameter determined evaluation system for dissolution of flooding polymers in pipeline |
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| CN (1) | CN105716996A (en) |
| WO (1) | WO2017177476A1 (en) |
Cited By (2)
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| CN109281666A (en) * | 2018-10-23 | 2019-01-29 | 长江大学 | A kind of oxygen auxiliary microbial oil displacement physical evaluation equipment and evaluation method |
| CN110410049A (en) * | 2019-07-24 | 2019-11-05 | 王雷 | A kind of method and device thereof for evaluating polymer solution adsorptivity in porous media |
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| CA3007793A1 (en) | 2015-12-08 | 2017-06-15 | Kemira Oyj | Inverse emulsion compositions |
| WO2017100344A1 (en) | 2015-12-08 | 2017-06-15 | Chevron U.S.A. Inc. | Methods for hydrocarbon recovery |
| US10619087B2 (en) | 2015-12-08 | 2020-04-14 | Chevron U.S.A. Inc. | Methods for hydrocarbon recovery |
| MX2019006508A (en) | 2016-12-07 | 2019-11-18 | Chevron Usa Inc | Methods and systems for generating aqueous polymer solutions. |
| US11220622B2 (en) | 2017-06-30 | 2022-01-11 | Chevron U.S.A. Inc. | High stability polymer compositions for enhanced oil recovery applications |
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| WO2017177476A1 (en) | 2017-10-19 |
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