CN216285115U - Preheating device for proppant conductivity evaluation experiments - Google Patents
Preheating device for proppant conductivity evaluation experiments Download PDFInfo
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- CN216285115U CN216285115U CN202121542821.XU CN202121542821U CN216285115U CN 216285115 U CN216285115 U CN 216285115U CN 202121542821 U CN202121542821 U CN 202121542821U CN 216285115 U CN216285115 U CN 216285115U
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Abstract
The utility model provides a preheating device for a proppant flow conductivity evaluation experiment, which comprises an inner container, an electric heating sleeve and a temperature control device, wherein the electric heating sleeve is sleeved outside the inner container, the temperature control device is connected with the electric heating sleeve and used for controlling the working temperature of the electric heating sleeve, the inner container is of a cavity structure, and the cavity structure of the inner container forms a sample inlet chamber; the sample inlet chamber comprises an original oil chamber, a water chamber and a floating plate, wherein the floating plate is movably mounted on the inner wall of the inner container, the sample inlet chamber is divided into the original oil chamber and the water chamber, a water inlet is formed in the lower portion of the water chamber, a water inlet pipeline is arranged on the sample inlet, the water chamber is located below the floating plate and connected with the water inlet pipeline, a crude oil outlet is formed in the upper portion of the crude oil chamber, a crude oil outlet pipeline is arranged on the crude oil outlet and connected with the original oil chamber above the floating plate, the sample inlet chamber is simple in structure, convenient to operate and rapid in temperature rise, and is completely free of contact between a heating medium and a circuit, and the safety coefficient is high.
Description
Technical Field
The utility model relates to an automatic electric heating device, in particular to a preheating device for a proppant short-term flow conductivity evaluation experiment when crude oil is used as a medium.
Background
The fracturing operation is one of the main means for the yield increase and transformation of the low-permeability reservoir in the oil field production, and the yield increase effect of the fracturing operation is closely related to the flow conductivity of a proppant fracture. Conductivity refers to the ability of fluid to pass through a proppant fracture under reservoir closure pressure, usually expressed as the product of the fracture permeability at closure pressure and the fracture closure width. In order to qualitatively know the flow conductivity of the proppant, an indoor proppant flow conductivity experiment is generally adopted for testing, and the results can be used for pertinently guiding the aspects of site fracturing design optimization, post-fracturing effect prediction, proppant preference evaluation and the like, thereby having important guiding significance for site fracturing construction.
It is known that the proppant diversion capability evaluation mostly uses water phase, kerosene, diesel oil and other light oil as diversion medium for experimental test, and the evaluation result has certain limitation on field referential property and guidance. Therefore, it is important to evaluate the conductivity of the proppant using crude oil (oil-water mixture) as the medium.
At present, the flow conductivity test principle is based on Darcy's law, and the flow conductivity experiment test is carried out according to the industry standard SY/T6302-2019 fracturing propping agent flow conductivity test method. First, the diversion chamber test proppant needs to be loaded with closure pressure long enough to be in a semi-stable state. And introducing a test medium under a certain closing pressure condition, respectively measuring the pressure difference, the filling width and the flow under different closing pressure conditions, and calculating the flow conductivity of the proppant filling layer by combining a proppant flow conductivity formula.
However, conventional conductivity meter tests are not currently satisfactory for proppant conductivity tests using crude oil as the medium. This is because the viscosity of the crude oil is greater than the viscosity of the test media such as distilled water and light oil, so that the normal flow pump located at the front section of the flow guide chamber cannot normally convey the crude oil due to increased load, and especially when the air temperature is low, the crude oil is easy to solidify, so that the pipeline of the circulating media is blocked, the normal flow pump is easy to break down, and the experimental efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
Aiming at solving the problems in the prior art that the conventional conductivity meter cannot meet the conductivity test with crude oil as a medium, and solving the problems of pipeline blockage, difficult transportation and the like caused by high viscosity of crude oil, the utility model provides the preheating device for the short-term conductivity evaluation test of the proppant with crude oil as the medium, which has the functions of heating and transporting crude oil, well solves the problem that the conventional conductivity meter cannot test the conductivity of the proppant with crude oil as a test medium, and has important significance for field guidance and reference of test evaluation results.
The specific technical scheme provided by the utility model is as follows:
a preheating device for a proppant flow conductivity evaluation experiment comprises an inner container, an electric heating sleeve and a temperature control device, wherein the electric heating sleeve is sleeved outside the inner container, the temperature control device is connected with the electric heating sleeve and used for controlling the working temperature of the electric heating sleeve, the inner container is of a cavity structure, and a sample inlet chamber is formed in the cavity structure of the inner container; the sample inlet chamber comprises an original oil chamber, a water chamber and a floating plate, wherein the floating plate is movably mounted on the inner wall of the inner container, the sample inlet chamber is divided into the original oil chamber and the water chamber, a water inlet is formed in the lower portion of the water chamber, a water inlet pipeline is arranged on the sample inlet, the water chamber is located below the floating plate and connected with the water inlet pipeline, a crude oil outlet is formed in the upper portion of the crude oil chamber, a crude oil outlet pipeline is arranged on the crude oil outlet, and the crude oil chamber is located above the floating plate and connected with the crude oil outlet pipeline.
Preferably, the sealing cover is provided with a thread and is in threaded connection with the crude oil chamber.
Preferably, the crude oil outlet is positioned at the middle position of the top of the sealing cover, and the crude oil chamber is connected with the crude oil outlet through the sealing cover.
Preferably, still include the magic subsides, the electric heating jacket outside is provided with the magic subsides.
Preferably, the oil well device further comprises a sealing ring, wherein the sealing ring is installed at the edge of the floating plate and used for preventing the water chamber and the crude oil chamber from being communicated with each other
Preferably, the water-saving device further comprises a constant flow pump, wherein the constant flow pump is connected with the water inlet pipeline, so that water enters the water chamber from the water inlet pipeline.
Preferably, a power line and a signal line are arranged on the outer side of the electric heating jacket, and the electric heating jacket is connected with the temperature control device through the signal line.
Preferably, the electric heating jacket includes inside lining, zone of heating, heat preservation and outer protective layer, inside lining, zone of heating, heat preservation and outer protective layer set up from inside to outside, be provided with temperature sensor and temperature sensing protection device in the zone of heating, be connected with temperature control device through the signal line to control electric heating jacket's temperature.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the defect that the conventional conductivity meter cannot perform a proppant conductivity test by using crude oil as a test medium at present is overcome, and the test range of the conventional conductivity meter is widened.
(2) Simple structure, convenient operation, rapid temperature rise, no contact between the heated medium and the circuit, and high safety factor.
(3) The automatic temperature control and heat preservation effect is good, and the error between the preset temperature and the experimental temperature can be maintained at +/-1 ℃.
(4) The utility model has good effect on heating and conveying crude oil samples, and solves the problem that the conventional conductivity meter can not test the conductivity experiment of the proppant taking crude oil as a test medium.
Drawings
FIG. 1 is a schematic structural view of a preheating device for a conductivity evaluation experiment provided by the utility model;
FIG. 2 is another schematic structural diagram of the preheating device for the flow conductivity evaluation experiment provided by the utility model;
FIG. 3 is a top view of the preheating device for testing the flow conductivity of the utility model;
the specific meanings of the symbols in the drawings are as follows:
1-water inlet pipeline; 2-crude oil outlet line; 3, sealing the cover; 4-crude oil chamber; 5, a water chamber; 6, floating plate; 7, an inner container; 8, an electric heating sleeve; 8-1-magic tape; 9-power supply line; 10-signal line.
Detailed Description
The preheating device for the proppant short-term flow conductivity evaluation experiment provided by the utility model with crude oil as a medium is specifically described below with reference to the accompanying drawings.
A preheating device for a proppant short-term flow conductivity evaluation experiment when crude oil is used as a medium comprises a detachable flexible electric heating sleeve and a sampling chamber. The electric heating jacket mainly comprises a lining, a heating layer, a heat preservation layer and an outer protection layer from inside to outside, wherein a temperature sensor (PT100 thermal resistor) and a thermosensitive protection device are arranged in the heating layer, and the working temperature of the heating jacket is controlled by connecting the temperature sensor to an intelligent temperature control box through a signal wire. The shape of the electric heating jacket is 'tailor-made' according to the structure of the sampling room. The sampling chamber uses the structural principle of the injector for reference, and the main body structure is divided into an original oil chamber and a water chamber from top to bottom through a movable floating plate. The water chamber is connected with an outlet pipeline of the advection pump, a sample adding port is arranged in the center of the top of the crude oil chamber and is sealed by a sealing cover with a thread, and the sealing cover is provided with a sample outlet pipeline communicated with the crude oil chamber and finally communicated with the flow guide chamber. In order to prevent the leakage of the two chambers of liquid, a temperature-resistant corrosion-resistant sealing ring is arranged at the edge of the floating plate for sealing.
As shown in fig. 1-3, the utility model provides a preheating device for a proppant flow conductivity evaluation experiment, which comprises an inner container 7, an electric heating jacket 8 and a temperature control device, wherein the electric heating jacket 8 is sleeved outside the inner container 7, the temperature control device is connected with the electric heating jacket 8 and is used for controlling the working temperature of the electric heating jacket, the inner container 7 is of a cavity structure, and the cavity structure of the inner container 7 forms a sample inlet chamber; the sampling chamber comprises a crude oil chamber 4, a water chamber 5, a sealing ring and a floating plate 6, wherein the sealing ring is arranged on the edge of the floating plate 6 and is used for preventing the water chamber 5 from being communicated with the crude oil chamber 4; the floating plate 6 is movably mounted on the inner wall of the inner container 7, the sampling chamber is divided into a crude oil chamber 4 and a water chamber 5, a water inlet is arranged below the water chamber 5, a water inlet pipeline 1 is arranged on the sample inlet and is positioned at the position of the water chamber below the floating plate 6, the crude oil chamber 4 is arranged above the crude oil chamber and is provided with a crude oil outlet, a crude oil outlet pipeline 2 is arranged on the crude oil outlet and is positioned at the position of the crude oil chamber 4 above the floating plate 6, and the crude oil outlet pipeline 2 is connected with the crude oil chamber 4.
The preheating device further comprises a sealing cover 3, wherein the sealing cover 3 is provided with a thread and is in threaded connection with the crude oil chamber 4, and the upper end of the crude oil chamber 4 is covered with the sealing cover 3. The crude oil outlet is positioned in the middle of the top of the sealing cover 3, and the crude oil chamber 4 is connected with the crude oil outlet through the sealing cover 3.
The preheating device provided by the utility model further comprises a magic tape 8-1, and the magic tape 8-1 is arranged on the outer side of the electric heating sleeve 8.
The preheating device provided by the utility model also comprises a constant flow pump, wherein the constant flow pump is connected with the water inlet pipeline 1, so that water enters the water chamber 5 from the water inlet pipeline 1.
The electric heating jacket provided by the utility model comprises a lining, a heating layer, a heat preservation layer and an outer protection layer, wherein the lining, the heating layer, the heat preservation layer and the outer protection layer are arranged from inside to outside, a temperature sensor and a thermosensitive protection device are arranged in the heating layer, and the temperature sensor and the thermosensitive protection device are connected with a temperature control device through signal wires, so that the temperature of the electric heating jacket is controlled. The outer side of the electric heating jacket is provided with a power line 9 and a signal line 10, and the electric heating jacket is connected with the temperature control device through the signal line 10.
The implementation steps of the utility model are as follows: firstly, a crude oil sample is added into a crude oil chamber 4, a sealing cover 3 is screwed down and is connected with a crude oil outlet pipeline 2 leading to a flow guide chamber, then an electric heating sleeve is connected, and the experiment temperature is set. When the crude oil temperature reaches the required temperature, a constant flow pump at the front end of the conventional flow guide capacity instrument is started, saturated distilled water is introduced into the water chamber 5 from the water inlet pipeline 1, the floating plate 6 is pushed, and the crude oil in the crude oil chamber 4 is jacked into the crude oil outlet pipeline 2 and finally enters the flow guide chamber. The utility model has good effect on heating and conveying crude oil samples, and solves the problem that the conventional conductivity meter can not test the conductivity experiment of the proppant taking crude oil as a test medium.
The foregoing detailed description is provided to illustrate preferred embodiments of the utility model and is not intended to limit the utility model in any way. Any equivalent structural or equivalent flow-path-changing embodiments, which may be modified or modified slightly within the scope of the present invention, and which may be used directly or indirectly in other related fields, are considered to be within the scope of the present invention by those skilled in the art.
Claims (8)
1. The preheating device for the proppant flow conductivity evaluation experiment is characterized by comprising an inner container, an electric heating sleeve and a temperature control device, wherein the electric heating sleeve is sleeved outside the inner container, the temperature control device is connected with the electric heating sleeve and used for controlling the working temperature of the electric heating sleeve, the inner container is of a cavity structure, and the cavity structure of the inner container forms a sample inlet chamber; the sample inlet chamber comprises an original oil chamber, a water chamber and a floating plate, wherein the floating plate is movably mounted on the inner wall of the inner container, the sample inlet chamber is divided into the original oil chamber and the water chamber, a water inlet is formed in the lower portion of the water chamber, a water inlet pipeline is arranged on the sample inlet, the water chamber is located below the floating plate and connected with the water inlet pipeline, a crude oil outlet is formed in the upper portion of the crude oil chamber, a crude oil outlet pipeline is arranged on the crude oil outlet, and the crude oil chamber is located above the floating plate and connected with the crude oil outlet pipeline.
2. The preheating device for proppant conductivity evaluation experiments as set forth in claim 1, further comprising a sealing cover having a threaded screw thread for threaded connection with the crude oil chamber.
3. The preheating device for proppant conductivity evaluation experiments as set forth in claim 2, wherein the crude oil outlet is located at the middle position of the top of the sealing cover, and the crude oil chamber is connected with the crude oil outlet through the sealing cover.
4. The preheating device for proppant conductivity evaluation experiments as set forth in claim 1, further comprising a magic tape, wherein the magic tape is arranged outside the electric heating jacket.
5. The preheating device for proppant conductivity evaluation experiments as set forth in claim 1, further comprising a sealing ring, wherein the sealing ring is installed on the edge of the floating plate, and the sealing ring is used for preventing the water chamber and the crude oil chamber from communicating with each other.
6. The preheating device for proppant conductivity evaluation experiments as set forth in claim 1, further comprising a constant flow pump, wherein the constant flow pump is connected to the water inlet pipeline, so that water enters the water chamber from the water inlet pipeline.
7. The preheating device for the proppant conductivity evaluation experiment as set forth in claim 1, wherein a power line and a signal line are arranged outside the electric heating jacket, and the electric heating jacket is connected with the temperature control device through the signal line.
8. The preheating device for the proppant flow conductivity evaluation experiment as set forth in claim 7, wherein the electric heating jacket comprises a lining, a heating layer, a heat preservation layer and an outer protection layer, the lining, the heating layer, the heat preservation layer and the outer protection layer are arranged from inside to outside, a temperature sensor and a heat-sensitive protection device are arranged in the heating layer, and are connected with the temperature control device through signal lines, so as to control the temperature of the electric heating jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121542821.XU CN216285115U (en) | 2021-07-07 | 2021-07-07 | Preheating device for proppant conductivity evaluation experiments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121542821.XU CN216285115U (en) | 2021-07-07 | 2021-07-07 | Preheating device for proppant conductivity evaluation experiments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216285115U true CN216285115U (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121542821.XU Active CN216285115U (en) | 2021-07-07 | 2021-07-07 | Preheating device for proppant conductivity evaluation experiments |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216285115U (en) |
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2021
- 2021-07-07 CN CN202121542821.XU patent/CN216285115U/en active Active
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