CN108132178B - Oil field injection water performance evaluation device and evaluation method - Google Patents
Oil field injection water performance evaluation device and evaluation method Download PDFInfo
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- CN108132178B CN108132178B CN201711380768.6A CN201711380768A CN108132178B CN 108132178 B CN108132178 B CN 108132178B CN 201711380768 A CN201711380768 A CN 201711380768A CN 108132178 B CN108132178 B CN 108132178B
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Abstract
The invention discloses an evaluation device and an evaluation method for the performance of injected water in an oil field, wherein the evaluation device comprises two liquid taking devices, two mixing devices and two filtering devices, and the two liquid taking devices have the same structure; get liquid device including a jar body, through-hole, feed liquor port, play liquid port and piston, the jar body top side of getting liquid device is provided with the through-hole, and the bottom side is provided with feed liquor port and play liquid port, feed liquor port and play liquid port on all be provided with the valve, the inside of jar body is equipped with the piston that can reciprocate, each device link up through pipeline interconnect, get the liquid device and can realize taking liquid at a distance from oxygen, can simulate temperature, the pressure environment etc. of reservoir in mixing arrangement. The invention can realize the full mixing of two fluids in various proportions under the condition of simulating the temperature and the pressure of a reservoir, and the sediment and the suspended solid generated after the fluid reaction are collected by the filtering device, thereby realizing the qualitative judgment and the quantitative evaluation of the stability and the compatibility of the fluid.
Description
Technical Field
The invention belongs to the technical field of experimental research and test in the process of petroleum exploration and development, and particularly relates to an evaluation device and an evaluation method for the performance of oilfield injection water.
Background
The produced water of offshore oil field is transported to nearby central processing platform through pipeline, and can be discharged into the ocean after being processed to reach the sea discharge standard of the national general offshore administration.
If the injected water is unstable or incompatible with the formation fluid, serious scaling phenomenon can be generated, which causes that a water injection and oil production system can not normally operate, and formation blockage can be caused, so that the water injection amount is reduced, thereby being a great problem influencing the normal production of the oil field. Therefore, compatibility experiments are carried out when any external fluid enters a reservoir, and the commonly used methods for evaluating the compatibility of the fluid at present comprise a scaling ion analysis method and a colorimetric method. The scaling ion analysis method is used for calculating the loss amount of scaling ions and analyzing the compatibility by detecting the change of the concentration of scaling cations before and after fluid mixing, and the method has large workload and is not suitable for quick field detection. The colorimetric method is used for analyzing the compatibility by detecting the change of turbidity before and after fluid mixing, and the method is greatly influenced by the color of a solution and can cause larger error of a measurement result. And the two methods can only qualitatively judge the compatibility and cannot quantitatively calculate the scale formation amount. If the produced water contains high content of ferrous ions or sulfur ions, the produced water is easy to be oxidized to generate sediment or suspended solids, which affects the evaluation result of compatibility, and the field closed oxygen-isolation detection is necessary.
The patent application document is invented by the national intellectual property office in 2017, 1, 4 and discloses an oil field water injection compatibility rapid analysis device with the patent name of CN106290185A, and the scheme of the patent document is that an online spectrophotometry is adopted to continuously and online measure the absorbance of a mixed water sample, so that the rapid analysis of the compatibility among different water samples is realized.
The principle of the spectrophotometry provided by the technical scheme is similar to that of the colorimetry, the influence of the color of the solution is large, the error of the measurement result is large, and an actual scale sample cannot be obtained.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an evaluation device and an evaluation method for the performance of injected water in an oil field, which can simulate the quantitative mixing process of different fluids under the oxygen-insulating condition of formation temperature and pressure to obtain an actual scale sample and evaluate the stability and compatibility of the fluids according to the quality of the scale sample.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an oilfield injection water performance evaluation device comprises two liquid taking devices, a mixing device and a filtering device;
the liquid taking device comprises a tank body, through holes, liquid inlet ports, liquid outlet ports and pistons, wherein the top side of the tank body of the liquid taking device is provided with the through holes, the bottom side of the tank body is respectively provided with the liquid inlet ports and the liquid outlet ports, the liquid inlet ports and the liquid outlet ports are respectively provided with a valve, the interior of the tank body is provided with the pistons capable of moving up and down, the pistons are in sealing contact with the inner wall of the tank body, transmission rods of the pistons pass through the top cover of the tank body, the liquid taking devices are two, the structures of the liquid taking devices are the same, and the liquid outlet;
the mixing device comprises a tank body, a pressure control port, a pressure gauge, a liquid inlet port, a piston, a closed packer, a thermometer, a liquid outlet port and a solar heating plate, wherein the pressure control port and the pressure gauge are arranged on the top side of the tank body of the mixing device, a valve is arranged on the pressure control port, a liquid inlet port and a solar heating plate are arranged on the bottom side of the pressure control port, the solar heating plate is arranged on the outer side of the bottom of the tank body of the mixing device, the liquid outlet port is arranged on one side of the lower part of the tank body of the mixing device, the piston capable of moving up and down is arranged in the tank body of the mixing device, the piston is in sealing contact with the inner wall of the tank body, the closed packer is arranged between the top cover of the tank body and the transmission rod of the piston, a temperature test groove is arranged, the liquid inlet port and the exhaust port are connected with the tee joint through pipelines, and the tee joint is connected with the tee joint through a pipeline;
filter equipment is including a jar body, feed liquor port, manometer, exhaust port, flowing back port, filter bowl and filter screen, the top side of the filter equipment jar body is provided with feed liquor port and manometer, and the feed liquor port is equipped with the valve, and the upside is provided with the exhaust port, and the downside is provided with the flowing back port, all is equipped with the valve on exhaust port and the flowing back port, and inside is equipped with the filter bowl, and the filter bowl passes through the upper end and connects the upper cover downside at the filter equipment jar body, filter equipment feed liquor port passes through pipeline connection with mixing arrangement play liquid port, filter bowl and feed liquor port looks UNICOM, the bottom side of filter bowl be equipped with convex cartridge filter downwards, the cartridge filter lower extreme be equipped with the filter screen, be provided with the millipore filter.
And volume metering scales are arranged on the side walls of the tank body of the liquid taking device, the tank body of the mixing device and the filter bowl in the tank body of the filtering device.
The maximum volume of the tank body of the liquid taking device is 500ml, the maximum volume of the tank body of the mixing device is 1000ml, and the maximum volume of the filter bowl in the tank body of the filter device is 1000 ml.
The tank body of the liquid taking device, the tank body of the mixing device, the tank body of the filtering device and the filter bowl are all made of transparent materials.
An oilfield injection water performance evaluation method comprises the following steps:
s1, before liquid taking, opening a liquid outlet valve of one of the liquid taking device tank bodies, closing a liquid inlet valve, placing a piston at the bottommost part of the tank body, injecting a small amount of distilled water through an upper through hole to completely cover the upper surface of the piston, connecting the liquid outlet port with a vacuum pump, starting the vacuum pump to evacuate air at the bottom of the piston, and closing the liquid outlet port valve;
then, another liquid taking device is repeatedly operated according to the method, and air is exhausted;
s2, before the process is switched in, a pressure control port and a liquid outlet port valve of the mixing device are opened, a liquid inlet port valve is closed, a piston is placed at the bottommost part of a tank body, a small amount of distilled water is injected from the pressure control port to completely cover the upper surface of the piston, the liquid outlet port is connected with a vacuum pump, and the liquid outlet port valve is closed after the vacuum pump is started to evacuate air at the bottom of the piston; connecting the exhaust port with a vacuum pump, starting the vacuum pump to evacuate air in the pipeline, and then closing an exhaust port valve;
s3, opening valves of a liquid inlet port and an exhaust port of the filtering device, closing a valve of a liquid discharge port, connecting the exhaust port with a vacuum pump, starting the vacuum pump, evacuating air in the tank body and in a pipeline, and closing the valves of the liquid inlet port and the exhaust port;
s4, placing the liquid inlet ports of the two liquid taking devices for emptying air below the liquid level of the fluid to be taken or connecting the liquid inlet ports with an on-site flow pipeline, opening the valves of the liquid inlet ports, when the required water amount is reached, closing the liquid inlet port valve, opening the liquid outlet port valves of the two liquid taking devices and the liquid inlet port valve of the mixing device, controlling the piston of the liquid taking device to ensure that two fluids at the liquid outlet port are mixed from the liquid inlet port into the tank body of the mixing device according to a certain proportion, closing the liquid outlet port of the liquid taking device and the liquid inlet port valve of the mixing device, the simulated reservoir temperature is controlled and adjusted through the heating plate, the fluid temperature can be detected through the thermometer, the pressure control device is connected with the pressure control port and used for providing simulated reservoir pressure, the fluid pressure can be measured through the pressure gauge, therefore, under the condition of simulating the temperature and the pressure of the reservoir, the full mixing of two fluids in various proportions is realized; opening an exhaust port valve, starting a vacuum pump, opening a liquid inlet port of a filtering device and a liquid outlet port valve of a mixing device after the negative pressure of the vacuum pump reaches 90kPa, closing the liquid outlet port valve of the mixing device after all liquid in a tank body of the mixing device enters a filter cup of the filtering device, continuously working the vacuum pump until all liquid in the filter cup enters the tank body of the filtering device through a microporous filter membrane, closing the vacuum pump, collecting precipitate and suspended solid generated after the reaction of the fluid, and qualitatively judging and quantitatively evaluating the compatibility of the two fluids.
And/or is:
an oilfield injection water performance evaluation method comprises the following steps:
s1-1, before liquid taking, opening a liquid outlet valve of one liquid taking device tank, closing a liquid inlet valve, placing a piston at the bottommost part of the tank, injecting a small amount of distilled water through an upper through hole to completely cover the upper surface of the piston, connecting a liquid outlet port with a vacuum pump, starting the vacuum pump to evacuate air at the bottom of the piston, and closing the liquid outlet port valve;
valves of a liquid inlet port and a liquid outlet port of the tank body of the other liquid taking device are always in a closed state;
s1-2, the same as the step S2;
s1-3, same as the step S3;
s1-4, placing a liquid inlet port of one air-evacuated liquid taking device tank below the liquid level of a fluid to be taken or connecting with a field flow pipeline, opening a liquid inlet port valve, closing the liquid inlet port valve after the required water amount is reached, opening a liquid outlet port of the liquid taking device and a liquid inlet port valve of a mixing device, controlling a piston of the liquid taking device to enable the fluid to enter the tank of the mixing device according to a certain volume, closing the liquid outlet port of the liquid taking device and the liquid inlet port valve of the mixing device, controlling and adjusting the simulated reservoir temperature through a heating plate, detecting the temperature of the fluid through a thermometer, connecting with a pressure control device through a pressure control port for providing simulated reservoir pressure, and measuring the pressure borne by the fluid through a pressure gauge so as to accurately simulate the reservoir temperature and pressure; opening a valve of an exhaust port of the filtering device, starting a vacuum pump, opening a valve of a liquid inlet port of the filtering device and a valve of a liquid outlet port of the mixing device after the negative pressure of the vacuum pump reaches 90kPa, closing the valve of the liquid outlet port of the mixing device after all liquid in a tank body of the mixing device enters a filter bowl of the filtering device, continuously working the vacuum pump until all liquid in the filter bowl enters the tank body of the filtering device through a microporous filter membrane, closing the vacuum pump, and collecting sediment and suspended solid generated after fluid reaction, thereby realizing qualitative judgment and quantitative evaluation on the stability of single fluid.
Compared with the prior art, the invention has the beneficial effects that:
the invention can realize oxygen isolation liquid taking and airtight preservation through the liquid taking device, a water sample with a certain volume enters the mixing device through the pipeline under the action of the piston, the temperature and pressure environment of a reservoir can be simulated in the mixing device, the heating plate is used for controlling and adjusting the temperature of the simulated reservoir, and the pressure control port is connected with the pressure control device and is used for providing the pressure of the simulated reservoir, so that the full mixing of two fluids in various proportions is realized under the condition of simulating the temperature and pressure of the reservoir, and sediment and suspended solids generated after the fluids react are collected through the filtering device, thereby realizing the qualitative judgment and quantitative evaluation of the stability and the compatibility of the fluids. The method optimizes the evaluation technology of the compatibility and stability of the injected water in the oil field, enables the evaluation method to be closer to the site, has higher accuracy and stronger representativeness, avoids the risk caused by incompatibility of the injected water, and can be popularized to the site application.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a schematic diagram of the structure of the device of the present invention.
Fig. 2 is a schematic structural view of the liquid extracting device of fig. 1.
Fig. 3 is a schematic structural view of the mixing device of fig. 1.
Fig. 4 is a schematic structural view of the filter device of fig. 1.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will further describe the present invention in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, 2, 3 and 4, an oilfield injection water performance evaluation device comprises a liquid taking device 1, a liquid taking device 2, a mixing device 3 and a filtering device 4;
as shown in fig. 1 and 2, the liquid taking device 1 comprises a tank body, a through hole 1-1, a liquid inlet port 1-3, a liquid outlet port 1-4 and a piston 1-2, the top side of the tank body of the liquid taking device 1 is provided with the through hole 1-1, communicated with the outside, the bottom side is respectively provided with a liquid inlet port 1-3 and a liquid outlet port 1-4, the liquid inlet port 1-3 and the liquid outlet port 1-4 are both provided with valves, the interior of the tank body is provided with a piston 1-2 which can move up and down, the piston 1-2 is in sealing contact with the inner wall of the tank body, a transmission rod of the piston 1-2 upwards passes through the top cover of the tank body, the structure of the liquid taking device 2 is the same as that of the liquid taking device 1, and a liquid outlet port 1-4 of a tank body of the liquid taking device 1 is connected with a liquid outlet port 2-4 of a tank body of the liquid taking device 2 through a pipeline and a tee joint 5;
as shown in figures 1 and 3, the mixing device 3 comprises a tank body, a pressure control port 3-1, a pressure gauge 3-3, a liquid inlet port 3-6, a piston 3-4, a closed packer 3-2, a thermometer 3-5, a liquid outlet port 3-8 and a solar heating plate 3-7, the pressure control port 3-1 and the pressure gauge 3-3 are arranged on the top side of the tank body of the mixing device 3, a valve is arranged on the pressure control port 3-1, the liquid inlet port 3-6 and the solar heating plate 3-7 are arranged on the bottom side of the tank body of the mixing device 3, the solar heating plate 3-7 is arranged on the outer side of the bottom of the tank body of the mixing device 3 and can be used for heating fluid and simulating formation temperature, the liquid outlet port 3-8 is arranged on one side of the lower part of the tank body, the piston 3, the piston 3-4 is in sealing contact with the inner wall of the tank body, a sealed packer 3-2 is arranged between the top cover of the tank body and a transmission rod of the piston 3-4, one side of the inner wall of the tank body of the mixing device 3 is provided with a temperature test slot, a thermometer 3-5 is fixed in the temperature test slot, the temperature of fluid can be detected through the thermometer 3-5, check valves are arranged on a liquid inlet port 3-6 and a liquid outlet port 3-8 of the tank body, a pressure gauge 3-9 is arranged in front of the check valve of the liquid outlet port 3-8, the liquid inlet port 3-6 and an exhaust port 7 are connected with a tee joint 6 through pipelines, and the tee joint 6 is;
as shown in figures 1 and 4, the filtering device 4 comprises a tank body, a liquid inlet port 4-1, a pressure gauge 4-2, an exhaust port 4-5, a liquid discharge port 4-6, a filter bowl 4-3 and a filter screen 4-4, wherein the top side of the tank body of the filtering device 4 is provided with the liquid inlet port 4-1 and the pressure gauge 4-2, the liquid inlet port 4-1 is provided with a valve, the upper side is provided with the exhaust port 4-5, the lower side is provided with the liquid discharge port 4-6, the exhaust port 4-5 and the liquid discharge port 4-6 are both provided with valves, the interior of the tank body is provided with the filter bowl 4-3, the filter bowl 4-3 is connected with the lower side of an upper cover of the tank body of the filtering device 4 through the upper end, the liquid inlet port 4-1 is connected with the liquid discharge port 3-8 through a, the filter bowl is used for receiving fluid entering from the liquid inlet port 4-1, a filter cylinder protruding downwards is arranged at the bottom side of the filter bowl 4-3, a filter screen 4-4 is arranged at the lower end of the filter cylinder, and a treated microporous filter membrane is arranged on the filter screen 4-4.
As shown in fig. 1 to 4, the side walls of the filter cups 4-3 in the tank bodies of the liquid taking devices 1 and 2, the tank body of the mixing device 3 and the tank body of the filtering device 4 are all provided with volume metering scales.
The maximum volume of the tank bodies of the liquid taking devices 1 and 2 is 500ml, the maximum volume of the tank body of the mixing device 3 is 1000ml, and the maximum volume of the filter cups 4-3 in the tank body of the filtering device 4 is 1000 ml.
The tank bodies of the liquid taking devices 1 and 2, the tank body of the mixing device 3, the tank body of the filtering device 4 and the filter cups 4-3 are all made of transparent materials, and the interior of the tank bodies is visible.
An oilfield injection water performance evaluation method comprises the following steps:
s1, before liquid taking, opening a liquid outlet valve of one of the liquid taking device tank bodies, closing a liquid inlet valve, placing a piston at the bottommost part of the tank body, injecting a small amount of distilled water through an upper through hole to completely cover the upper surface of the piston, connecting the liquid outlet port with a vacuum pump, starting the vacuum pump to evacuate air at the bottom of the piston, and closing the liquid outlet port valve;
then, another liquid taking device is repeatedly operated according to the method, and air is exhausted;
s2, before the process is switched in, a pressure control port and a liquid outlet port valve of the mixing device are opened, a liquid inlet port valve is closed, a piston is placed at the bottommost part of a tank body, a small amount of distilled water is injected from the pressure control port to completely cover the upper surface of the piston, the liquid outlet port is connected with a vacuum pump, and the liquid outlet port valve is closed after the vacuum pump is started to evacuate air at the bottom of the piston; connecting the exhaust port with a vacuum pump, starting the vacuum pump to evacuate air in the pipeline, and then closing an exhaust port valve;
s3, opening valves of a liquid inlet port and an exhaust port of the filtering device, closing a valve of a liquid discharge port, connecting the exhaust port with a vacuum pump, starting the vacuum pump, evacuating air in the tank body and in a pipeline, and closing the valves of the liquid inlet port and the exhaust port;
s4, placing the liquid inlet ports of the two liquid taking devices for emptying air below the liquid level of the fluid to be taken or connecting the liquid inlet ports with an on-site flow pipeline, opening the valves of the liquid inlet ports, when the required water amount is reached, closing the liquid inlet port valve, opening the liquid outlet port valves of the two liquid taking devices and the liquid inlet port valve of the mixing device, controlling the piston of the liquid taking device to ensure that two fluids at the liquid outlet port are mixed from the liquid inlet port into the tank body of the mixing device according to a certain proportion, closing the liquid outlet port of the liquid taking device and the liquid inlet port valve of the mixing device, the simulated reservoir temperature is controlled and adjusted through the heating plate, the fluid temperature can be detected through the thermometer, the pressure control device is connected with the pressure control port and used for providing simulated reservoir pressure, the fluid pressure can be measured through the pressure gauge, therefore, under the condition of simulating the temperature and the pressure of the reservoir, the full mixing of two fluids in various proportions is realized; opening an exhaust port valve, starting a vacuum pump, opening a liquid inlet port of a filtering device and a liquid outlet port valve of a mixing device after the negative pressure of the vacuum pump reaches 90kPa, closing the liquid outlet port valve of the mixing device after all liquid in a tank body of the mixing device enters a filter cup of the filtering device, continuously working the vacuum pump until all liquid in the filter cup enters the tank body of the filtering device through a microporous filter membrane, closing the vacuum pump, collecting precipitate and suspended solid generated after the reaction of the fluid, and qualitatively judging and quantitatively evaluating the compatibility of the two fluids.
And/or is:
an oilfield injection water performance evaluation method comprises the following steps:
s1-1, before liquid taking, opening a liquid outlet valve of one liquid taking device tank, closing a liquid inlet valve, placing a piston at the bottommost part of the tank, injecting a small amount of distilled water through an upper through hole to completely cover the upper surface of the piston, connecting a liquid outlet port with a vacuum pump, starting the vacuum pump to evacuate air at the bottom of the piston, and closing the liquid outlet port valve;
valves of a liquid inlet port and a liquid outlet port of the tank body of the other liquid taking device are always in a closed state;
s1-2, the same as the step S2;
s1-3, same as the step S3;
s1-4, placing a liquid inlet port of one air-evacuated liquid taking device tank below the liquid level of a fluid to be taken or connecting with a field flow pipeline, opening a liquid inlet port valve, closing the liquid inlet port valve after the required water amount is reached, opening a liquid outlet port of the liquid taking device and a liquid inlet port valve of a mixing device, controlling a piston of the liquid taking device to enable the fluid to enter the tank of the mixing device according to a certain volume, closing the liquid outlet port of the liquid taking device and the liquid inlet port valve of the mixing device, controlling and adjusting the simulated reservoir temperature through a heating plate, detecting the temperature of the fluid through a thermometer, connecting with a pressure control device through a pressure control port for providing simulated reservoir pressure, and measuring the pressure borne by the fluid through a pressure gauge so as to accurately simulate the reservoir temperature and pressure; opening a valve of an exhaust port of the filtering device, starting a vacuum pump, opening a valve of a liquid inlet port of the filtering device and a valve of a liquid outlet port of the mixing device after the negative pressure of the vacuum pump reaches 90kPa, closing the valve of the liquid outlet port of the mixing device after all liquid in a tank body of the mixing device enters a filter bowl of the filtering device, continuously working the vacuum pump until all liquid in the filter bowl enters the tank body of the filtering device through a microporous filter membrane, closing the vacuum pump, and collecting sediment and suspended solid generated after fluid reaction, thereby realizing qualitative judgment and quantitative evaluation on the stability of single fluid.
In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore should not be construed as limiting the scope of the present invention.
In conclusion, although the present invention has been exemplified by the above preferred embodiments, it should be noted that, although various changes and modifications may be made by those skilled in the art, unless such changes and modifications depart from the scope of the present invention, they should be construed as being included therein.
Claims (6)
1. The utility model provides an oil field injected water performance evaluation device which characterized in that: comprises a liquid taking device (1), a liquid taking device (2), a mixing device (3) and a filtering device (4);
the liquid taking device (1) comprises a tank body, a through hole (1-1), a liquid inlet port (1-3), a liquid outlet port (1-4) and a piston (1-2), wherein the top side of the tank body of the liquid taking device (1) is provided with the through hole (1-1), the bottom side of the tank body is provided with the liquid inlet port (1-3) and the liquid outlet port (1-4), the liquid inlet port (1-3) and the liquid outlet port (1-4) are respectively provided with a valve, the piston (1-2) capable of moving up and down is arranged in the tank body, the piston (1-2) is in sealing contact with the inner wall of the tank body, a transmission rod of the piston (1-2) passes through a top cover of the tank body, the structure of the liquid taking device (2) is the same as that of the liquid taking device (1), and the liquid outlet port (1-4) of the tank body of the liquid taking device (1) and the liquid outlet Is connected with a tee joint (5);
the mixing device (3) comprises a tank body, a pressure control port (3-1), a pressure gauge (3-3), a liquid inlet port (3-6), a piston (3-4), a closed packer (3-2), a thermometer (3-5), a liquid outlet port (3-8) and a solar heating plate (3-7), wherein the pressure control port (3-1) and the pressure gauge (3-3) are arranged on the top side of the tank body of the mixing device (3), a valve is arranged on the pressure control port (3-1), the liquid inlet port (3-6) and the solar heating plate (3-7) are arranged on the bottom side of the pressure control port, the solar heating plate (3-7) is arranged on the outer side of the bottom of the tank body of the mixing device (3), the liquid outlet port (3-8) is arranged on one side of the lower part of the tank body, the piston (3-4) capable of moving up and, the piston (3-4) is in sealing contact with the inner wall of the tank body, a sealed packer (3-2) is arranged between the top cover of the tank body and a transmission rod of the piston (3-4), one side of the inner wall of the tank body of the mixing device (3) is provided with a temperature test slot, a thermometer (3-5) is fixed in the temperature test slot, a liquid inlet port (3-6) and a liquid outlet port (3-8) of the tank body are both provided with check valves, a pressure gauge (3-9) is arranged in front of the check valve of the liquid outlet port (3-8), the liquid inlet port (3-6) and an exhaust port (7) are connected with a tee joint (6) through pipelines, and the tee joint (6) is connected with the tee joint;
the filter device (4) comprises a tank body, a liquid inlet port (4-1), a pressure gauge (4-2), an exhaust port (4-5), a liquid discharge port (4-6), a filter bowl (4-3) and a filter screen (4-4), wherein the liquid inlet port (4-1) and the pressure gauge (4-2) are arranged on the top side of the tank body of the filter device (4), a valve is arranged on the liquid inlet port (4-1), the exhaust port (4-5) is arranged on the upper side, the liquid discharge port (4-6) is arranged on the lower side, valves are arranged on the exhaust port (4-5) and the liquid discharge port (4-6), the filter bowl (4-3) is arranged inside the valve, the filter bowl (4-3) is connected to the lower side of an upper cover of the tank body of the filter device (4) through the upper end, and the liquid inlet port (4-1) is connected, the filter bowl (4-3) is communicated with the liquid inlet port (4-1), the bottom side of the filter bowl (4-3) is provided with a filter cartridge protruding downwards, the lower end of the filter cartridge is provided with a filter screen (4-4), and the filter screen (4-4) is provided with a processed microporous filter membrane.
2. The oilfield injection water performance evaluation device of claim 1, wherein: the side walls of the filter cups (4-3) in the tank bodies of the liquid taking devices (1 and 2), the tank body of the mixing device (3) and the tank body of the filtering device (4) are respectively provided with volume metering scales.
3. The oilfield injection water performance evaluation device of claim 1 or 2, wherein: the maximum volume of the tank bodies of the liquid taking devices (1 and 2) is 500ml, the maximum volume of the tank body of the mixing device (3) is 1000ml, and the maximum volume of the filter cups (4-3) in the tank body of the filtering device (4) is 1000 ml.
4. The oilfield injection water performance evaluation device of claim 1 or 2, wherein: the tank bodies of the liquid taking devices (1 and 2), the tank body of the mixing device (3), the tank body of the filtering device (4) and the filter bowl (4-3) are all made of transparent materials.
5. The method for evaluating the performance of the oilfield injection water is characterized by comprising the following steps of:
s1, before liquid taking, opening a liquid outlet valve of one of the liquid taking device tank bodies, closing a liquid inlet valve, placing a piston at the bottommost part of the tank body, injecting a small amount of distilled water through an upper through hole to completely cover the upper surface of the piston, connecting the liquid outlet port with a vacuum pump, starting the vacuum pump to evacuate air at the bottom of the piston, and closing the liquid outlet port valve;
then, another liquid taking device is repeatedly operated according to the method, and air is exhausted;
s2, before the process is switched in, a pressure control port and a liquid outlet port valve of the mixing device are opened, a liquid inlet port valve is closed, a piston is placed at the bottommost part of a tank body, a small amount of distilled water is injected from the pressure control port to completely cover the upper surface of the piston, the liquid outlet port is connected with a vacuum pump, and the liquid outlet port valve is closed after the vacuum pump is started to evacuate air at the bottom of the piston; connecting the exhaust port with a vacuum pump, starting the vacuum pump to evacuate air in the pipeline, and then closing an exhaust port valve;
s3, opening valves of a liquid inlet port and an exhaust port of the filtering device, closing a valve of a liquid discharge port, connecting the exhaust port with a vacuum pump, starting the vacuum pump, evacuating air in the tank body and in a pipeline, and closing the valves of the liquid inlet port and the exhaust port;
s4, placing the liquid inlet ports of the two liquid taking devices for emptying air below the liquid level of the fluid to be taken or connecting with an on-site flow pipeline, opening the liquid inlet port valve, when the required water amount is reached, closing the liquid inlet port valve, opening the liquid outlet port valves of the two liquid taking devices and the liquid inlet port valve of the mixing device, controlling the piston of the liquid taking device to ensure that two fluids at the liquid outlet port are mixed from the liquid inlet port into the tank body of the mixing device according to a certain proportion, closing the liquid outlet port of the liquid taking device and the liquid inlet port valve of the mixing device, the simulated reservoir temperature is controlled and adjusted through the heating plate, the fluid temperature can be detected through the thermometer, the pressure control device is connected with the pressure control port and used for providing simulated reservoir pressure, the fluid pressure can be measured through the pressure gauge, therefore, under the condition of simulating the temperature and the pressure of the reservoir, the full mixing of two fluids in various proportions is realized; opening an exhaust port valve, starting a vacuum pump, opening a liquid inlet port of a filtering device and a liquid outlet port valve of a mixing device after the negative pressure of the vacuum pump reaches 90kPa, closing the liquid outlet port valve of the mixing device after all liquid in a tank body of the mixing device enters a filter cup of the filtering device, continuously working the vacuum pump until all liquid in the filter cup enters the tank body of the filtering device through a microporous filter membrane, closing the vacuum pump, collecting precipitate and suspended solid generated after the reaction of the fluid, and qualitatively judging and quantitatively evaluating the compatibility of the two fluids.
6. The method for evaluating the performance of the oilfield injection water is characterized by comprising the following steps of:
s1-1, before liquid taking, opening a liquid outlet valve of one liquid taking device tank, closing a liquid inlet valve, placing a piston at the bottommost part of the tank, injecting a small amount of distilled water through an upper through hole to completely cover the upper surface of the piston, connecting a liquid outlet port with a vacuum pump, starting the vacuum pump to evacuate air at the bottom of the piston, and closing the liquid outlet port valve;
valves of a liquid inlet port and a liquid outlet port of the tank body of the other liquid taking device are always in a closed state;
s1-2, the same as step S2 described in claim 5;
s1-3, the same as step S3 described in claim 5;
s1-4, placing a liquid inlet port of one air-evacuated liquid taking device tank below the liquid level of a fluid to be taken or connecting with a field flow pipeline, opening a liquid inlet port valve, closing the liquid inlet port valve after the required water amount is reached, opening a liquid outlet port of the liquid taking device and a liquid inlet port valve of a mixing device, controlling a piston of the liquid taking device to enable the fluid to enter the tank of the mixing device according to a certain volume, closing the liquid outlet port of the liquid taking device and the liquid inlet port valve of the mixing device, controlling and adjusting the simulated reservoir temperature through a heating plate, detecting the temperature of the fluid through a thermometer, connecting with a pressure control device through a pressure control port for providing simulated reservoir pressure, and measuring the pressure borne by the fluid through a pressure gauge so as to accurately simulate the reservoir temperature and pressure; opening a valve of an exhaust port of the filtering device, starting a vacuum pump, opening a valve of a liquid inlet port of the filtering device and a valve of a liquid outlet port of the mixing device after the negative pressure of the vacuum pump reaches 90kPa, closing the valve of the liquid outlet port of the mixing device after all liquid in a tank body of the mixing device enters a filter bowl of the filtering device, continuously working the vacuum pump until all liquid in the filter bowl enters the tank body of the filtering device through a microporous filter membrane, closing the vacuum pump, and collecting sediment and suspended solid generated after fluid reaction, thereby realizing qualitative judgment and quantitative evaluation on the stability of single fluid.
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| CN1076757A (en) * | 1992-03-25 | 1993-09-29 | 山东省招远膜工程设备厂 | A kind of water injection filter technology for oil field |
| US6773603B2 (en) * | 2000-03-13 | 2004-08-10 | Intellectual Capital Enterprises, Inc. | Chemical removal and suspended solids separation pre-treatment system |
| CN102225812B (en) * | 2011-04-22 | 2012-11-21 | 江苏久吾高科技股份有限公司 | Membrane treatment process for oilfield reinjection water |
| CN104402132A (en) * | 2014-09-28 | 2015-03-11 | 中石化石油工程设计有限公司 | Equipment and method for fine filtering of ultra-low permeability oil field A1-grade reinjection water |
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