CN215727521U - Device and system for measuring oil displacement performance of surfactant - Google Patents
Device and system for measuring oil displacement performance of surfactant Download PDFInfo
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- CN215727521U CN215727521U CN202120051616.7U CN202120051616U CN215727521U CN 215727521 U CN215727521 U CN 215727521U CN 202120051616 U CN202120051616 U CN 202120051616U CN 215727521 U CN215727521 U CN 215727521U
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- 239000004094 surface-active agent Substances 0.000 title claims abstract description 93
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 39
- 238000005259 measurement Methods 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000002474 experimental method Methods 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 26
- 230000008859 change Effects 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims description 75
- 239000007788 liquid Substances 0.000 claims description 16
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000010779 crude oil Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 description 8
- 239000011435 rock Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013543 active substance Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The device and the system for measuring the oil displacement performance of the surfactant comprise an experiment cavity capable of being adjusted to a set formation temperature, and further comprise an output unit, a first measuring unit and a second measuring unit, wherein the output unit, the first measuring unit and the second measuring unit are arranged in the experiment cavity; the output unit is used for outputting a mixture of the injected water and the surfactant to be detected; the first measuring unit is used for measuring the pressure drop change of the mixture passing through the oil-containing porous medium sample; the second measurement unit is used for measuring the oil displacement efficiency of the surfactant to be measured on the oil-containing porous medium sample, and the surfactant oil displacement experiment under various factors can be solved through the self-built surfactant oil displacement evaluation experiment platform, and the influence of the resistance factor of the porous medium on the surfactant is considered.
Description
Technical Field
The utility model relates to the technical field of exploration of oil fields, in particular to a device and a system for measuring oil displacement performance of a surfactant.
Background
In recent years, low-permeability oil reservoirs become important sources of oil production and storage increase, such as Daqing oil fields, Changqing oil fields, Liaohe oil fields and the like in China, and the oil reservoirs have the characteristics of low porosity and permeability, complex pore structure, small pore throat size, large seepage resistance and insufficient natural energy. The chemical oil displacement technology plays an important role in the tertiary oil recovery process, and the purpose of increasing the yield can be achieved by improving the interaction of rocks and fluid in a reservoir. The surfactant flooding is a representative of the surfactant flooding and has a good development prospect, but the current measurement means for the performance of the surfactant flooding is limited and has a plurality of defects.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above disadvantages, an embodiment of the first aspect of the present application provides a surfactant flooding performance measurement apparatus, including an experiment cavity adjustable to a set formation temperature, and further including an output unit, a first measurement unit, and a second measurement unit disposed in the experiment cavity;
the output unit is used for outputting a mixture of the injected water and the surfactant to be detected;
the first measuring unit is used for measuring the pressure drop change of the mixture passing through the oil-containing porous medium sample;
the second measuring unit is used for measuring the oil displacement efficiency of the surfactant to be measured on the oil-containing porous medium sample.
In some embodiments, the output unit includes:
the surfactant storage tank to be detected stores the surfactant to be detected;
the injection water storage tank stores the injection water;
the pump is used for driving the surfactant to be detected and the injected water to be led out from the respective liquid storage tanks;
and the mixer is used for mixing the derived surfactant to be detected and the injected water so as to output a mixture of the injected water and the surfactant to be detected.
In certain embodiments, the first measurement unit comprises:
a channel provided with an oil-containing porous medium sample, the channel being communicated with the output unit;
a differential pressure transmitter for detecting a pressure drop of the mixture of the channel at both sides of the oil-containing porous medium sample.
In certain embodiments, the second measurement unit comprises:
the output pipeline is communicated with the mixture output port of the first measuring unit;
the back pressure regulator is arranged on the output pipeline and is used for regulating the pressure at the outlet of the output pipeline; and
and the oil quantity detector is used for measuring the oil quantity output from the outlet of the output pipeline.
In certain embodiments, the sample of oil-containing porous medium is an artificial core that has been subjected to crude oil displacement.
In some embodiments, the mixer is a three-way pipe, one pipe orifice of the three-way pipe is communicated with the surfactant liquid storage tank to be measured, the other pipe orifice is communicated with the injection water storage tank, and the other pipe orifice is communicated with the first measuring unit.
In certain embodiments, further comprising:
and the video acquisition unit is used for acquiring video data of the mixture passing through the oil-containing porous medium in the first measurement unit.
In certain embodiments, the pump is a advection pump.
In certain embodiments, the set formation temperature is 60 ℃.
Another embodiment of the present application provides a surfactant flooding performance measurement system, including:
computer and surfactant flooding performance measuring device; the device for measuring the flooding performance of the surfactant comprises an experiment cavity capable of being adjusted to a set formation temperature, and further comprises an output unit, a first measuring unit and a second measuring unit which are arranged in the experiment cavity;
the output unit is used for outputting a mixture of the injected water and the surfactant to be detected;
the first measuring unit is used for measuring the pressure drop change of the mixture passing through the oil-containing porous medium sample;
the second measuring unit is used for measuring the oil displacement efficiency of the surfactant to be measured on the oil-containing porous medium sample;
and the computer draws a curve of each parameter changing along with time and a relation curve between each parameter and the oil displacement efficiency according to the video data collected from the first measurement unit.
The beneficial effect of this application is as follows:
the utility model provides a pair of surfactant flooding ability measuring device, system, the experimental platform of surfactant flooding evaluation through independently setting up can solve the surfactant flooding experiment under the various factors, has considered the influence of porous medium's resistance factor to surfactant. In the preferred technical scheme, the influence of each factor on the oil displacement experiment is judged by accurate reading and drawing of an electronic computer; and the pressure difference change measured by the high-precision differential pressure transmitter judges the resistance reduction performance of the surfactant, and can comprehensively perform oil displacement experiment evaluation of the surfactant.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram showing a surfactant flooding performance measuring apparatus according to an embodiment of the present invention.
Fig. 2 shows a schematic configuration diagram of a surfactant flooding performance measurement system in the embodiment of the present application.
FIG. 3 is a graph showing the relationship between the surfactant concentration and the oil displacement efficiency over time in the embodiment of the present application.
FIG. 4 shows the relationship between the volume factor of the injected pores of the surfactant and the depressurization rate in the examples of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The current experiments for studying surfactant flooding are mainly divided into static surfactant flooding and dynamic surfactant flooding. The static oil displacement does not consider the influence of factors such as flow rate and the like, and is only used for the performance evaluation of the surfactant; and the dynamic oil displacement is added with the influence of the injection speed of the active agent and the like, and the performance evaluation is carried out on the surfactant oil displacement from more influencing factors. However, the two experiments have large errors in manually collecting data and do not consider the judgment of the resistance factor of the surfactant to the fluid flowing porous medium, so that the method has the defects.
Fig. 1 shows a schematic block diagram of a surfactant flooding performance measurement apparatus in an embodiment of an aspect of the present application, including an experimental chamber 100 adjustable to a set formation temperature, and further including an output unit 200, a first measurement unit 300, and a second measurement unit 400 disposed in the experimental chamber; the output unit 200 is used for outputting a mixture of the injected water and the surfactant to be detected; the first measuring unit 300 is used for measuring the pressure drop change of the mixture passing through the oil-containing porous medium sample; the second measurement unit 400 is configured to measure the oil displacement efficiency of the surfactant to be measured on the oil-containing porous medium sample.
According to the device for measuring the oil displacement performance of the surfactant, the experiment platform for evaluating the oil displacement of the surfactant which is built automatically can be used for solving the oil displacement experiment of the surfactant under various factors, and the influence of the resistance factor of the porous medium on the surfactant is considered.
In some embodiments, the oil-containing porous medium sample is an artificial core with known physicochemical properties and subjected to crude oil displacement treatment, namely, before the surfactant flooding experiment is carried out, conventional core physical property analysis is firstly carried out, wherein the conventional core physical property analysis comprises the porosity, the permeability and the like of the core. In addition, the cores were cleaned with methanol and toluene prior to any testing. Thereafter, the core sample was first saturated with brine and then replaced with crude oil at low flow rates to determine the water saturation at reservoir conditions. The flow rate is generally 1.0ml/min, the crude oil is used to drive water until no water is produced, and the temperature of the experimental environment is determined to be constant to 60 ℃.
Of course, the oil-containing porous medium sample may also be other similar substances, but in order to simulate the properties of the reservoir, a core of a real reservoir is generally adopted as the oil-containing porous medium sample, so that the method is more accurate.
As shown in fig. 2, the output unit includes: a surfactant storage tank 3 to be tested, which stores the surfactant to be tested; an injection water storage tank 2 for storing the injection water; the pump 1 is used for driving the surfactant to be detected and the injected water to be led out from respective liquid storage tanks; and a mixer (not shown) for mixing the derived surfactant to be measured and the injection water, and outputting a mixture of the injection water and the surfactant to be measured.
In a specific example, the mixer is a three-way pipe, one pipe orifice of the three-way pipe is communicated with the surfactant liquid storage tank to be measured, the other pipe orifice of the three-way pipe is communicated with the injected water liquid storage tank, and the other pipe orifice of the three-way pipe is communicated with the first measuring unit. The pump is a constant flow pump which provides power for guiding out liquid in the liquid storage tank.
The pipeline where the liquid storage tank is arranged is provided with a one-way stop valve, so that the flow speed of the fluid can be controlled at will.
In the embodiment of fig. 2, the first measurement unit includes: a channel 9 provided with an oil-containing porous medium sample, wherein the channel 9 is communicated with the output unit; a differential pressure transmitter 10 for detecting the pressure drop of the mixture at both sides of the sample of oil-containing porous medium of the channel 9.
When the oil-containing porous medium is a core, the channel 9 may be a core holder.
Meanwhile, continuing to refer to the embodiment shown in fig. 2, the second measurement unit includes: the output pipeline is communicated with the mixture output port of the first measuring unit; the back pressure regulator 8 is arranged on the output pipeline and is used for regulating the pressure at the outlet of the output pipeline; and an oil amount detector 11 for measuring an amount of oil output through the outlet of the output line.
In some embodiments, the oil amount detector is a measuring cylinder, and the like, which is not described herein.
In addition, in some embodiments, the experimental chamber adjustable to the set formation temperature may be a constant temperature oven, and in order to better simulate the formation temperature, the temperature of the constant temperature oven is set to be 60 ℃, although a wide temperature range, such as 20-90 ℃, may be selected in practical use, and the application is not limited thereto.
In some embodiments, in order to perform real-time measurement of the experimental parameters, the apparatus further comprises: and the video acquisition unit 7 is used for acquiring video data of the mixture passing through the oil-containing porous medium in the first measurement unit.
In some embodiments, the upper part of the core holder is connected to a DP (standardized digital video interface).
In another aspect, the present application further provides a system for measuring oil displacement performance of a surfactant, and fig. 2 is a schematic structural diagram of the system for measuring oil displacement performance of a surfactant in an embodiment of the present application. As shown in fig. 2, includes: computer and surfactant flooding performance measuring device; the device for measuring the flooding performance of the surfactant comprises an experiment cavity capable of being adjusted to a set formation temperature, and further comprises an output unit, a first measuring unit and a second measuring unit which are arranged in the experiment cavity; the output unit is used for outputting a mixture of the injected water and the surfactant to be detected; the first measuring unit is used for measuring the pressure drop change of the mixture passing through the oil-containing porous medium sample; the second measuring unit is used for measuring the oil displacement efficiency of the surfactant to be measured on the oil-containing porous medium sample; and the computer draws a curve of each parameter changing along with time and a relation curve between each parameter and the oil displacement efficiency according to the video data collected from the first measurement unit.
It can be understood that based on the same utility model concept, the experiment platform of surfactant oil displacement evaluation that this aspect was built through independently can solve the surfactant oil displacement experiment under the various factors, has considered the influence of porous medium's resistance factor to surfactant. And the influence of each factor on the oil displacement experiment is judged by accurate reading drawing of an electronic computer; and the pressure difference change measured by the high-precision differential pressure transmitter judges the resistance reduction performance of the surfactant, and can comprehensively perform oil displacement experiment evaluation of the surfactant.
In some embodiments, the core holder is modified to have two connecting holes added in the middle of the side surface, and the two connecting holes are connected with the differential pressure transmitter line, and the differential pressure transmitter directly measures the differential pressure value at the two ends of the core, so that the differential pressure measuring result is more accurate than the differential pressure result at the two ends of the measuring pipeline.
In addition, the output of the differential pressure transmitter is 4-20 mA HART, the rated range is 0-3 Kpa, and the rated range is close to the actual seepage resistance of fluid passing through the rock core holder.
Furthermore, the working temperature of the constant-temperature flow pump is 5-40 ℃, the constant-temperature flow pump cannot be placed in the constant-temperature oven, the constant-temperature flow pump is provided with an LED display screen, and data such as flow and speed can be obtained through the constant-temperature flow pump.
When the pump flow changes, the BPR (back pressure regulator) can preset an outlet pressure, so that the outlet pressure cannot change along with the change of the pipeline pressure, and the expelled oil can smoothly enter the measuring cylinder.
The use of the system of the present aspect is described in detail below.
Referring to fig. 2, in the experiment, firstly, the pump 1 is started, and certain pressure is controlled to enable the liquid in the liquid storage tanks 2 and 3 to reach the expected flow rate, the one-way stop valves 4 are arranged on the pipelines at the lower parts of the surfactant liquid storage tank 2 and the injected water liquid storage tank 3, the flow of the liquid can be controlled at will, when the water flooding is required to act on the rock core in the rock core holder 9, the stop valve at the lower part of the liquid storage tank 3 is opened, the stop valve of the liquid storage tank 4 is closed, and the process can be completed, and vice versa. After fluid flows through the rock core at a certain flow rate through a pipeline, the data acquisition computer 6 receives DP 7 signal transmission at the lower part, curves of parameters changing along with time and curves between the curves and oil displacement efficiency are drawn according to data records of the computer 6, the fluid passes through the rock core holder 9 and then passes through the back pressure regulator 8 to control pressure, and therefore the fluid enters the measuring cylinder, and the oil displacement m can be scaled from the wall of the measuring cylinder to obtain data.
The formula of the oil displacement efficiency is as follows:
η＝m/m_0
in the formula: m is the amount of oil displaced, and m _0 is the total weight of the initially injected crude oil and the core. And obtaining a relation graph of the surfactant concentration and the oil displacement efficiency which are changed along with time in the figure 3. The differential pressure transmitter 10 connected with the core holder 9 measures the difference of the seepage resistance of the fluid flowing through the core in real time, the differential pressure transmitter 10 can obtain the change curve of the pore volume multiple of the injected surfactant and the depressurization rate, and the resistance reduction condition of the surfactant on the micro-channel flowing of the core is analyzed to obtain the relation between the pore volume multiple of the injected surfactant and the depressurization rate in fig. 4.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the specification. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example.
Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. The above description is only an example of the embodiments of the present disclosure, and is not intended to limit the embodiments of the present disclosure. Various modifications and variations to the embodiments described herein will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present specification should be included in the scope of the claims of the embodiments of the present specification.
Claims (10)
1. The device for measuring the flooding performance of the surfactant comprises an experiment cavity capable of being adjusted to a set formation temperature, and is characterized by further comprising an output unit, a first measuring unit and a second measuring unit, wherein the output unit, the first measuring unit and the second measuring unit are arranged in the experiment cavity;
the output unit is used for outputting a mixture of the injected water and the surfactant to be detected;
the first measuring unit is used for measuring the pressure drop change of the mixture passing through the oil-containing porous medium sample;
the second measuring unit is used for measuring the oil displacement efficiency of the surfactant to be measured on the oil-containing porous medium sample.
2. The surfactant flooding property measurement apparatus of claim 1, wherein said output unit comprises:
the surfactant storage tank to be detected stores the surfactant to be detected;
the injection water storage tank stores the injection water;
the pump is used for driving the surfactant to be detected and the injected water to be led out from the respective liquid storage tanks;
and the mixer is used for mixing the derived surfactant to be detected and the injected water so as to output a mixture of the injected water and the surfactant to be detected.
3. The surfactant flooding property measurement apparatus of claim 1, wherein the first measurement unit comprises:
a channel provided with an oil-containing porous medium sample, the channel being communicated with the output unit;
a differential pressure transmitter for detecting a pressure drop of the mixture of the channel at both sides of the oil-containing porous medium sample.
4. The surfactant flooding property measurement apparatus of claim 1, wherein said second measurement unit comprises:
the output pipeline is communicated with the mixture output port of the first measuring unit;
the back pressure regulator is arranged on the output pipeline and is used for regulating the pressure at the outlet of the output pipeline; and
and the oil quantity detector is used for measuring the oil quantity output from the outlet of the output pipeline.
5. The surfactant flooding performance measurement apparatus according to claim 1, wherein the oil-containing porous medium sample is an artificial core subjected to crude oil displacement treatment.
6. The apparatus of claim 2, wherein the mixer is a tee, one pipe orifice of the tee communicating with the reservoir for surfactant to be measured, the other pipe orifice communicating with the reservoir for injection water, and the other pipe orifice communicating with the first measuring unit.
7. The surfactant flooding property measuring apparatus according to claim 1, further comprising:
and the video acquisition unit is used for acquiring video data of the mixture passing through the oil-containing porous medium in the first measurement unit.
8. The surfactant flooding property measurement apparatus of claim 2, wherein said pump is a advection pump.
9. The surfactant flooding performance measurement apparatus of claim 1, wherein said set formation temperature is 60 ℃.
10. A surfactant flooding performance measurement system, comprising:
computer and surfactant flooding performance measuring device; the device for measuring the flooding performance of the surfactant comprises an experiment cavity capable of being adjusted to a set formation temperature, and further comprises an output unit, a first measuring unit and a second measuring unit which are arranged in the experiment cavity;
the output unit is used for outputting a mixture of the injected water and the surfactant to be detected;
the first measuring unit is used for measuring the pressure drop change of the mixture passing through the oil-containing porous medium sample;
the second measuring unit is used for measuring the oil displacement efficiency of the surfactant to be measured on the oil-containing porous medium sample;
and the computer draws a curve of each parameter changing along with time and a relation curve between each parameter and the oil displacement efficiency according to the video data collected from the first measurement unit.
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| CN202120051616.7U CN215727521U (en) | 2021-01-08 | 2021-01-08 | Device and system for measuring oil displacement performance of surfactant |
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