CN211008562U - Weak gel profile control agent injection performance evaluation device - Google Patents
Weak gel profile control agent injection performance evaluation device Download PDFInfo
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- CN211008562U CN211008562U CN201921377258.8U CN201921377258U CN211008562U CN 211008562 U CN211008562 U CN 211008562U CN 201921377258 U CN201921377258 U CN 201921377258U CN 211008562 U CN211008562 U CN 211008562U
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- 238000002347 injection Methods 0.000 title claims abstract description 19
- 239000007924 injection Substances 0.000 title claims abstract description 19
- 238000011156 evaluation Methods 0.000 title claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 65
- 238000005070 sampling Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 abstract description 26
- 230000008859 change Effects 0.000 abstract description 18
- 239000011148 porous material Substances 0.000 abstract description 14
- 239000000499 gel Substances 0.000 description 53
- 238000010008 shearing Methods 0.000 description 12
- 239000011435 rock Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 230000005012 migration Effects 0.000 description 5
- 238000013508 migration Methods 0.000 description 5
- 238000004088 simulation Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model discloses a weak gel profile control agent injection performance evaluation device, including a plurality of flourishing fluid reservoir, flourishing fluid reservoir has first direction controller through the pipe connection, and first direction controller output is connected to the power pump through the pipeline, and the power pump is connected to the circulation pipeline input through first circulation pipeline, and the circulation pipeline is connected to second direction controller through second circulation pipeline, and second direction controller is connected to flourishing fluid reservoir through the pipeline, and open on the pipeline between second direction controller and the flourishing fluid reservoir input has the sample connection; all be connected with pressure sensor on first circulating line and the second circulating line, the circulating line is seamless steel pipe, and wherein the power pump still with controller signal of telecommunication connection, the controller still respectively with first direction controller and second direction controller signal of telecommunication connection. The actual pore system is simulated through the circulating pipeline, and the on-way friction loss and pressure drop change of weak gel in the high-permeability dominant channel porous medium can be simulated.
Description
Technical Field
The utility model belongs to the technical field of the gel evaluation, concretely relates to weak gel profile control agent injection performance evaluation device.
Background
The key to establishing the profile control agent injection performance evaluation method is to establish a physical model matched with the reservoir. And the cracks and pores in the low-permeability fractured reservoir coexist, the storage and seepage space is complex, and a physical model is difficult to establish. In order to simulate the actual condition of a formation medium as much as possible, a plurality of porous medium models are adopted according to experimental needs, wherein the porous medium models comprise an artificial sand-filled rock core, a cemented rock core, a fractured rock core, a natural rock core and the like. These models have long filling cycle, poor repeatability, immature core making technology, and are difficult to simulate large pore path and fracture state under low permeability reservoir conditions.
Disclosure of Invention
The utility model aims at providing a weak gel profile control agent injection performance evaluation device to solve the model and fill out the system cycle length, repeatability is poor, and the rock core preparation technique is immature, and hardly simulates the problem of large pore path and crack state under the hyposmosis oil reservoir condition.
The purpose of the utility model is realized by the following technical means,
a weak gel profile control agent injection performance evaluation device comprises a plurality of liquid containing tanks, wherein the output ends of the liquid containing tanks are connected with a first guide controller through pipelines, the output ends of the first guide controller are connected to a power pump through pipelines, the power pump is connected to the input end of a circulation pipeline through a first circulation pipeline, the output end of the circulation pipeline is connected to a second guide controller through a second circulation pipeline, the second guide controller is connected to the input end of the liquid containing tanks through pipelines, and sampling ports are formed in the pipelines between the second guide controller and the input end of the liquid containing tanks; all be connected with pressure sensor on first circulating line and the second circulating line, the circulating line is seamless steel pipe, and wherein the power pump still with controller signal of telecommunication connection, the controller still respectively with first direction controller and second direction controller signal of telecommunication connection.
Furthermore, contain the fluid reservoir totally two, including first flourishing fluid reservoir and the flourishing fluid reservoir of second, the first output that contains the fluid reservoir of fluid reservoir and second all is connected to first guide controller through the pipeline, and the first input that contains the fluid reservoir and the flourishing fluid reservoir of second all is connected to the second guide controller through the pipeline, and first flourishing fluid reservoir and second all open on the pipeline between fluid reservoir input and the second guide controller has the sample connection.
Furthermore, the two ends of the circulating pipeline are also connected with detachable joints, and the circulating pipeline is respectively connected with the first circulating pipeline and the second circulating pipeline through the detachable joints.
Further, the circulation pipeline is spiral.
Further, the liquid containing tank and the circulating pipeline are respectively arranged in an air blast thermostat.
Furthermore, the device also comprises a data acquisition system which is respectively connected with the power pump and the two pressure sensors through electric signals.
The beneficial effects of the utility model reside in that: the migration condition of weak gel in a reservoir porous medium is fully considered; the injection process of weak gel can be simulated and the injection speed can be optimized; high permeability dominant channels of different scale conditions can be simulated; the gelling state and the change conditions of viscosity and strength of weak gel when the weak gel flows in a porous medium can be simulated; the on-way friction loss and pressure drop change of weak gel flowing in the porous medium with high permeability and dominant channels can be simulated. The actual pore system is simulated through the seamless steel pipe to replace a real object for experimental research, so that the capillary property and the pore structure characteristics of the pore medium can be more deeply disclosed, and the pore throat distribution characteristics of the rock are comprehensively shown. Moreover, the model is simple and convenient to operate and convenient for quantitative calculation.
Drawings
The present invention will be described in further detail with reference to the following drawings and examples:
FIG. 1 is a schematic view of the present apparatus;
wherein 1, a liquid containing tank; 1-1, a first liquid containing tank; 1-2, a second liquid containing tank; 2. a first steering controller; 3. a circulation line; 4. a second steering controller; 5. a sampling port; 6-1 a first recycle conduit; 6-2, a second circulation pipeline; 7 a power pump; 8. a controller; 9. an air blast thermostat; 10. a data display cabinet; 11. a data acquisition system.
Detailed Description
[ example 1 ]
As shown in fig. 1, the weak gel profile control agent injection performance evaluation device comprises a plurality of liquid containing tanks 1, wherein the output ends of the liquid containing tanks 1 are connected with a first guide controller 2 through pipelines, the output ends of the first guide controller 2 are connected to a power pump 7 through pipelines, the power pump 7 is connected to the input end of a circulation pipeline 3 through a first circulation pipeline 6-1, the output end of the circulation pipeline 3 is connected to a second guide controller 4 through a second circulation pipeline 6-2, the second guide controller 4 is connected to the input end of the liquid containing tank 1 through a pipeline, and sampling ports 5 are formed in the pipelines between the second guide controller 4 and the input end of the liquid containing tank 1; the first circulating pipeline 6-1 and the second circulating pipeline 6-2 are both connected with pressure sensors, the circulating pipeline 3 is a seamless steel pipe, the power pump 7 is further in electric signal connection with the controller 8, and the controller 8 is further in electric signal connection with the first guiding controller 2 and the second guiding controller 4 respectively.
The output end of each liquid containing tank 1 is connected to the input end of a first guide controller 2 through a pipeline, the output end of the first guide controller 2 is connected to a power pump 7 through a pipeline, the power pump 7 is connected to the input end of a circulation pipeline 3 through a first circulation pipeline 6-1, the output end of the circulation pipeline 3 is connected to a second guide controller 4 through a second circulation pipeline 6-2, and the second guide controller 4 is connected to the input end of the liquid containing tank 1 through a pipeline. The first guide controller 2 and the second guide controller 4 are valves, are opened under the control of the controller 8, are communicated with one of the output ends of the plurality of liquid containing tanks 1, only inject weak gel in the liquid containing tank 1, and the weak gel in the rest liquid containing tanks 1 is blocked by the first guide controller 2, and the second guide controller 4 is used for controlling the weak gel flowing out of the circulating pipeline 3 to enter an input end pipeline of the liquid containing tank 1.
A sampling port 5 is arranged on a pipeline between the second guide controller 4 and the input end of the liquid containing tank 1; for removal of the treated weak gel for observation or testing.
The first circulation pipeline 6-1 and the second circulation pipeline 6-2 are both connected with pressure sensors for detecting the pressure at the inlet and the outlet of the circulation pipeline 3,
the circulation pipeline 3 is a seamless steel pipe, and the circulation pipeline 3 simulates a large pore and a crack by using seamless steel pipes with two different pipe diameters of 3 × 1mm and phi 6 × 1 mm.
The power pump 7 is also electrically connected with a controller 8 to control the injection amount and the pump pressure of the power pump 7, and the controller 8 is also electrically connected with the first guide controller 2 and the second guide controller 4 respectively. The first guide controller 2 and the second guide controller 4 control the orientation of the weak gel.
The two liquid containing tanks 1 comprise a first liquid containing tank 1-1 and a second liquid containing tank 1-2, the output ends of the first liquid containing tank 1-1 and the second liquid containing tank 1-2 are connected to the first guide controller 2 through pipelines, the input ends of the first liquid containing tank 1-1 and the second liquid containing tank 1-2 are connected to the second guide controller 4 through pipelines, and sampling ports 5 are formed in the pipelines between the input ends of the first liquid containing tank 1-1 and the second liquid containing tank 1-2 and the second guide controller 4.
When the device is used, the first guide controller 2 and the second guide controller 4 open a channel connected with the first liquid containing tank 1-1, weak gel in the first liquid containing tank 1-1 is injected into the circulating pipeline 3 along the pipeline under the action of the power pump 7, flows back into the first liquid containing tank 1-1 through the second guide controller 4 after coming out of the circulating pipeline 3, the sampling port 5 is opened at regular time, and part of the weak gel after being processed in the pipeline is taken out for observation.
The two ends of the circulating pipeline 3 are also connected with detachable joints, and the circulating pipeline 3 is respectively connected with the first circulating pipeline 6-1 and the second circulating pipeline 6-2 through the detachable joints. The two ends of the circulation pipeline 3 are connected with detachable joints, when the circulation pipeline 3 is replaced, the circulation pipeline 3 and the detachable joints are detached together, and new circulation pipelines 3 and the detachable joints are arranged on the first circulation pipeline 6-1 and the second circulation pipeline 6-2.
The circulation line 3 is helical.
The liquid containing tank 1 and the circulating pipeline 3 are respectively arranged in an air blast thermostat 9. To ensure that the liquid tank 1 and the circulating pipeline 3 are kept at constant temperature.
The device also comprises a data acquisition system 11, wherein the data acquisition system 11 is respectively connected with the power pump 7 and the two pressure sensors through electric signals. The data acquisition system 11 acquires and stores pressure values of an inlet and an outlet of the circulation pipeline 3, and flow and pump pressure set by the pressure pump 7.
[ example 2 ]
There are many models for the microstructure of porous rock at home and abroad, such as capillary tube bundle, network, spherical pore segment, throat cavity and the like. Different models are suitable for different rock pore structures. Consider the migration of weak gels in the reservoir porous medium-preferentially through high-permeability channels such as large channels and fractures, whereas in low-permeability reservoirs, the relatively large size of both the fractures and large channels correspond to one "tube" in the rock matrix. Therefore, a capillary bundle model, namely the circulation pipeline 3, is utilized in the device to simulate the migration of weak gel in large pores or cracks.
Regarding a reservoir large pore or a crack as an equivalent capillary, on a horizontal pipeline with a constant value of delta/d (delta is the absolute roughness of the capillary, d is the diameter of the capillary), when a certain flow of fluid passes through, the corresponding seepage velocity can be calculated (formula 1):
in the formula, ν is the seepage velocity, Q is the flow rate, and A is the inner diameter of the tube.
The corresponding pressure difference delta p at the two ends of the experimental capillary can be measured through the pressure sensor, and the on-way resistance loss h can be calculatedf(formula 2) and an in-path friction coefficient λ (formula 3):
where ρ is the fluid density, L is the capillary length, and d is the capillary inner diameter.
For Newtonian fluids, the fluid flows in a thin tube, and its dynamic viscosity can be determined by Harroot's rise leaf law. However, for non-Newtonian fluids, this law does not apply, but there is one
Value (formula 4):
is a variable
To variable quantity
Is reciprocal value of (a) such that
In the formula (I), the compound is shown in the specification,
is the shear rate of the fluid at the tube wall.
Therefore, when the rheological property of the fluid is researched by using a pipeline model, a series of delta p and corresponding Q values are firstly measured and obtained by a graphic or algebraic method
Then, the shear rate at the tube wall is obtained from the equations 3 to 5
Then, make τ -
And (4) a relation curve, namely a rheological curve of the fluid, so as to judge the rheological type of the fluid. And fitting the experimental data by selecting a proper rheological equation to determine rheological parameters.
However, for the viscoelastic fluid, the rheological property of the viscoelastic fluid is researched by adopting a method of measuring the apparent viscosity of the viscoelastic fluid at intervals and drawing a curve of the change of the viscosity along with shearing time, and the rheological property is correspondingly compared with the curves of the pressure, the on-way resistance loss and the like along with the change of time to obtain the relative change relation of the viscoelastic fluid; the method is also convenient to compare with the gel static gelling viscosity time curve to obtain the viscosity loss rate of the gel after shearing, and is also convenient to compare with the viscosity recovery curve of the gel after shearing to obtain the viscosity recovery rate of the gel.
Meanwhile, by replacing the horizontal pipelines with different pipe diameters, a change relation curve of pressure difference and shearing time and a change relation curve of apparent viscosity and shearing time under the condition of different pipe diameters can be obtained. Therefore, the injectability of the weak gel in the deep migration process is evaluated, and the change rule of the weak gel in the migration of pores with different sizes at different seepage speeds is obtained.
[ example 3 ]
As shown in FIG. 1, the use method of the weak gel profile control agent injection performance evaluation device comprises the following steps:
firstly, injecting weak gel into a first liquid containing tank 1-1 and a second liquid containing tank 1-2 respectively;
secondly, the controller 8 controls the first guide controller 2 and the second guide controller 4 to open a passage connected with the first liquid containing tank 1-1, so that weak gel can enter the circulating pipeline 3 from the output end of the first liquid containing tank 1-1 through the first guide controller 2 and return to the input end of the first liquid containing tank 1-1 from the circulating pipeline 3 through the second guide controller 4;
the controller 8 opens the first guide controller 2 and the second guide controller 4 to open a passage connected with the first liquid containing tank 1-1, so that the weak gel can be injected into the pipeline and returns to the first liquid containing tank 1-1 after being processed by the circulating pipeline 3.
Thirdly, starting the power pump 7 through the controller 8, injecting weak gel in the first liquid containing tank 1-1 into the circulating pipeline 3 along the pipeline by the power pump 7, and flowing out of the circulating pipeline 3 after circulation of the weak gel is finished and flowing back to the first liquid containing tank 1-1;
the power pump 7 drives weak gel in the first liquid containing tank 1-1 to be injected into the pipeline, the weak gel enters the circulating pipeline 3 after passing through the first guide controller 2, the power pump and the first circulating pipeline 6-1, is discharged from the outlet of the circulating pipeline 3 after simulation in the circulating pipeline 3 is finished, enters the second circulating pipeline 6-2, and finally returns to the first liquid containing tank 1-1 through the second guide controller 4. The weak gel returned to the first liquid containing tank 1-1 is injected into the pipeline again under the driving of the power pump 7 for circulation simulation.
Fourthly, if the weak gel in the first liquid containing tank 1-1 is injected and the whole pipeline is not filled with the weak gel, the controller 8 controls the first guide controller 2 and the second guide controller 4 to open a passage connected with the second liquid containing tank 1-2, and the weak gel in the second liquid containing tank 1-2 is injected into the pipeline until the whole pipeline is filled with the weak gel;
if the weak gel in the first liquid containing tank 1-1 is completely filled and the whole pipeline is still not filled with the weak gel, the controller 8 controls the first guide controller 2 and the second guide controller 4 to open the passage connected with the second liquid containing tank 1-2 for a long time, and the power pump 7 is enabled to inject the weak gel in the second liquid containing tank 1-2 into the pipeline until all the pipelines and pipelines of the whole device are filled with the weak gel.
Fifthly, recording pressures at an inlet and an outlet of the circulating pipeline 3 by pressure sensors of the first circulating pipeline 6-1 and the second circulating pipeline 6-2, calculating a pressure difference, and drawing a change curve of the pressure difference along with shearing time;
the data acquisition system 11 records the collected pressures at the inlet and the outlet of the circulating pipeline 3, calculates the pressure difference and draws a change curve of the pressure difference along with the shearing time;
the weak gel is taken from the sampling port 5 at regular time to measure the apparent viscosity of the weak gel, and a change curve of the apparent viscosity along with the shearing time is drawn;
and (3) shearing the gel solution for a plurality of hours through a pipeline under the conditions of constant temperature and constant flow, discharging the residual weak gel solution, sealing and subpackaging the discharged weak gel solution in a container, standing the gel solution in a constant temperature box, measuring the viscosity at regular time, and drawing a change curve of the prepared viscosity along with the standing time.
And after shearing for 40 hours through a pipeline, discharging the residual weak gel solution, sealing and subpackaging the discharged weak gel solution in containers, standing the containers in a constant temperature box, measuring the viscosity at regular time, and drawing a change curve of the viscosity along with the standing time.
And after the fifth step, changing the power of the power pump 7 so as to change the injection displacement of the weak gel, and repeating the first step to the fifth step to obtain the change curves of the pressure difference and the apparent viscosity along with the shearing time under different displacements. The power of the power pump 7 was varied to change the injection displacement of the gel for the simulation again.
And after the fifth step, the circulation pipeline 3 is disassembled through the detachable joint, the circulation pipelines 3 with different diameters are replaced, and the first step to the fifth step are repeated until the change curves of the pressure difference and the apparent viscosity with the shearing time under different diameters. The simulation was performed again by replacing the circulation lines 3 of different diameters.
The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.
Claims (6)
1. The utility model provides a weak gel profile control agent pours into performance evaluation device which characterized in that: the device comprises a plurality of liquid containing tanks (1), wherein the output ends of the liquid containing tanks (1) are connected with a first guide controller (2) through pipelines, the output ends of the first guide controller (2) are connected to a power pump (7) through pipelines, the power pump (7) is connected to the input end of a circulating pipeline (3) through a first circulating pipeline (6-1), the output end of the circulating pipeline (3) is connected to a second guide controller (4) through a second circulating pipeline (6-2), the second guide controller (4) is connected to the input end of the liquid containing tanks (1) through pipelines, and sampling ports (5) are formed in the pipelines between the second guide controller (4) and the input end of the liquid containing tanks (1); pressure sensors are connected to the first circulating pipeline (6-1) and the second circulating pipeline (6-2), the circulating pipeline (3) is a seamless steel pipe, the power pump (7) is further in electric signal connection with the controller (8), and the controller (8) is further in electric signal connection with the first guide controller (2) and the second guide controller (4) respectively.
2. The weak gel profile control agent injection performance evaluation device according to claim 1, characterized in that: the two liquid containing tanks (1) comprise a first liquid containing tank (1-1) and a second liquid containing tank (1-2), the output ends of the first liquid containing tank (1-1) and the second liquid containing tank (1-2) are connected to a first guide controller (2) through pipelines, the input ends of the first liquid containing tank (1-1) and the second liquid containing tank (1-2) are connected to a second guide controller (4) through pipelines, and sampling ports (5) are formed in the pipelines between the input ends of the first liquid containing tank (1-1) and the second liquid containing tank (1-2) and the second guide controller (4).
3. The weak gel profile control agent injection performance evaluation device according to claim 1, characterized in that: the two ends of the circulating pipeline (3) are also connected with detachable joints, and the circulating pipeline (3) is respectively connected with the first circulating pipeline (6-1) and the second circulating pipeline (6-2) through the detachable joints.
4. The weak gel profile control agent injection performance evaluation device according to claim 1 or 3, characterized in that: the circulating pipeline (3) is spiral.
5. The weak gel profile control agent injection performance evaluation device according to claim 1, characterized in that: the liquid containing tank (1) and the circulating pipeline (3) are respectively arranged in an air blast thermostat (9).
6. The weak gel profile control agent injection performance evaluation device according to claim 1, characterized in that: the device also comprises a data acquisition system (11), wherein the data acquisition system (11) is respectively in electric signal connection with the power pump (7) and the two pressure sensors.
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| CN110630212A (en) * | 2019-08-23 | 2019-12-31 | 中国石油天然气股份有限公司 | Weak gel profile control agent injection performance evaluation device and using method thereof |
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| CN110630212A (en) * | 2019-08-23 | 2019-12-31 | 中国石油天然气股份有限公司 | Weak gel profile control agent injection performance evaluation device and using method thereof |
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