CN215565879U - Oil reservoir displacement simulation equipment - Google Patents
Oil reservoir displacement simulation equipment Download PDFInfo
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- CN215565879U CN215565879U CN202121405991.3U CN202121405991U CN215565879U CN 215565879 U CN215565879 U CN 215565879U CN 202121405991 U CN202121405991 U CN 202121405991U CN 215565879 U CN215565879 U CN 215565879U
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Abstract
The utility model discloses an oil reservoir displacement simulation device. The equipment comprises a displacement device, a plurality of sand filling models and a production device which are connected in parallel; the sand filling model comprises a cemented lower plate and an upper plate, the upper plate is transparent, sandstone particles are filled between the lower plate and the upper plate, at least one liquid injection port is formed in one end, close to the displacement device, of the upper plate, and at least one liquid outlet is formed in one end, close to the extraction device, of the upper plate. The sand filling models connected in parallel are arranged, so that simultaneous displacement of multiple layers of oil reservoirs is simulated, and more real actual conditions can be reflected; through the arrangement of the positions and the number of the liquid injection ports and the liquid outlet ports, the real well pattern distribution condition can be well simulated.
Description
Technical Field
The utility model relates to the technical field of indoor physical simulation of oil and gas field development engineering, in particular to oil reservoir displacement simulation equipment.
Background
Crude oil reserves in our country are dominated by continental heterogeneous reservoirs, most of which require waterflooding development due to insufficient natural energy. The conditions of unbalanced propulsion of injected water, low spread degree, complex distribution of residual oil and the like are easy to occur under the influence of internal and external factors such as reservoir heterogeneity, edge water conditions, stratum inclination angles, well pattern forms, injection-production relations and the like. Therefore, the conventional mining mode is simply used for mining, so that the mining degree is low easily, and the economic benefit is low. Therefore, before water flooding development is performed on a certain oil reservoir, it is necessary to perform indoor physical simulation experiments to determine a production method suitable for the properties of the oil reservoir and crude oil.
The conventional oil reservoir simulation device for indoor experiments is a single rock core, the influence of simultaneous displacement of multiple layers and other multiple factors is not considered, and the actual condition cannot be objectively reflected.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been developed to provide a reservoir displacement simulation apparatus that overcomes, or at least partially solves, the above-mentioned problems.
The embodiment of the utility model provides oil reservoir displacement simulation equipment, which comprises a displacement device, a plurality of sand-packed models and a production device, wherein the sand-packed models and the production device are connected in parallel;
the sand filling model comprises a cemented lower plate and an upper plate, the upper plate is transparent, and sandstone particles are filled between the lower plate and the upper plate;
and at least one liquid injection port is arranged at one end of the upper plate close to the displacement device, and at least one liquid outlet is arranged at one end close to the extraction device.
The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:
1. the oil reservoir displacement simulation equipment provided by the embodiment of the utility model comprises a displacement device, a plurality of sand-packed models and a production device, wherein the sand-packed models and the production device are connected in parallel; the sand filling model comprises a cemented lower plate and an upper plate, the upper plate is transparent, and sandstone particles with different meshes are filled between the lower plate and the upper plate; the upper plate is provided with at least one liquid injection port at one end close to the displacement device, and at least one liquid outlet at one end close to the extraction device. The sand filling models connected in parallel are arranged, so that simultaneous displacement of multiple layers of oil reservoirs is simulated, more real actual conditions can be reflected, and the defect that only a single oil reservoir can be simulated is overcome.
2. Through the setting of the position and the quantity of the liquid injection ports and the liquid outlet ports, the real well pattern distribution situation can be well simulated, and a basis is provided for the layout of the well pattern in the actual exploitation process.
3. The sandstone particles filled between the lower plate and the upper plate are sandstone particles with different meshes, so that the heterogeneous condition of the reservoir is simulated.
4. The displacement device, the sand filling models connected in parallel and the extraction device are mutually independent devices, and the models are cleaned after one experiment and then reused; the whole equipment can be disassembled, and all the devices can be repeatedly used and independently replaced.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is an exemplary diagram of an overall configuration of a reservoir displacement simulation apparatus according to an embodiment of the present invention;
FIG. 2 is a top view of a sand pack pattern according to an embodiment of the present invention;
FIG. 3 is a top view of a plurality of sand packed pattern assemblies connected in parallel according to an embodiment of the present invention;
FIG. 4 is a flow chart of a process for making a sand-packed model according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to solve the problem that a device for simulating an oil reservoir does not consider the water drive development effect when a multilayer oil reservoir is simultaneously displaced in the prior art, the embodiment of the utility model provides oil reservoir displacement simulation equipment, which is provided with a plurality of sand filling models connected in parallel, simulates the simultaneous displacement of the multilayer oil reservoir and can reflect more real actual conditions; through the arrangement of the positions and the number of the liquid injection ports and the liquid outlet ports, the real well pattern distribution condition can be well simulated.
Examples
The embodiment of the utility model provides reservoir displacement simulation equipment, which is shown in figure 1 and comprises a displacement device 1, a plurality of sand filling models 2 connected in parallel and a production device 3.
Referring to fig. 2, the sand-packed model 2 comprises a cemented lower plate and an upper plate (only the upper plate is shown in fig. 2 because fig. 2 is a top view), the upper plate is transparent, sandstone particles 21 with different meshes are filled between the lower plate and the upper plate, the upper plate is provided with at least one liquid injection port 22 at one end close to the displacement device, and at least one liquid outlet port 23 at one end close to the extraction device.
The main body of the sand-filled model is formed by cementing two lower layer plates and an upper layer plate which are the same in size, and the upper layer plate is transparent, so that the change of oil-water distribution characteristics can be directly observed and recorded in the displacement experiment process; the lower plate may or may not be transparent. For example, the upper and lower sheets may be two pieces of transparent glass of the same size, 15cm by 15cm, and the thickness of the sand-packed pattern may be 0.8 cm.
In one embodiment, referring to fig. 2, an edge water stripe 24 is arranged between the lower plate and the upper plate within a set width range close to one end of the displacement device, and the distribution density of the sandstone particles in the edge water stripe 24 is smaller than that in the non-edge water stripe. Preferably, in order to better simulate a real displacement scene, the sandstone particle distribution density in the edge water strip 24 is gradually reduced from the boundary of the non-sandstone strip to the end close to the displacement device, namely the edge water strip is gradually generated.
Sandstone particles with different meshes are filled between the lower plate and the upper plate and are uniformly mixed in advance, so that the heterogeneity of the oil reservoir can be better simulated; different permeability of oil reservoirs can be simulated through different filling densities of the sandstone particles.
The upper plate of the sand-filling model is provided with at least one liquid injection port at one end close to the displacement device, at least one liquid outlet at one end close to the extraction device, and the number and the quantity of the liquid injection ports and the liquid outlets are determined according to the actual or pre-designed injection and extraction well pattern condition. The calibers of the liquid injection port and the liquid outlet can be consistent, all the shafts of the liquid injection end and the liquid extraction end can be simulated to have the same size, and for example, the calibers of pipes inserted into the liquid injection port and the liquid outlet can be both 2mm in outer diameter and 1mm in inner diameter.
Referring to fig. 2, all sand filling models simulate the same injection-production well pattern, namely one injection-two production, the upper plate is provided with an injection port 22 at the edge near one end of the displacement device, and two liquid outlets 23 are provided at the edge near one end of the production device.
The periphery of the sand filling model is sealed by a sealing strip 25; the periphery of the sand-packed model is clamped by glass clamps 26. The sealing performance around the sand-filled model is fully ensured.
In one embodiment, the apparatus further comprises a stand 4. The object placing table 4 is provided with a supporting frame 41, the supporting frame 41 includes a vertical supporting rod 411, a plurality of horizontally extending supporting arms 412 connected with the supporting rod 411, and a supporting portion (not shown in fig. 1) connected with the supporting arms 412 through a rotating shaft 413, the supporting portion is used for placing a sand-packed model, and the supporting portion can rotate obliquely through the rotating shaft 413.
The inclination angle of the corresponding sand filling model can be set according to the inclination direction of each layer of oil deposit in the simulated multilayer oil deposit.
The support frame can be used for stacking or horizontally placing the models. Referring to fig. 3, a plurality of sand packed models 2 connected in parallel are not overlapped with each other in the horizontal direction.
In one embodiment, the image acquisition devices 6 are arranged at the upper parts of the sand-packed models 2 connected in parallel; the light source 5 is arranged at the lower part of the sand-packed models 2 connected in parallel. The image acquisition device 6 may also be connected to a computer 7.
Preferably, the light source is a collimated light source. The camera lens of the image acquisition device can be matched with a bottom light source to accurately and clearly record real-time data in the displacement experiment process.
The displacement device 1 comprises a first multi-way valve 11, a first fluid pipeline 12 connected between a liquid injection port 22 and a port of the first multi-way valve 11, a second fluid pipeline 13 connected between the displacement liquid and the port of the first multi-way valve 11, a pressure gauge 14 arranged between the first fluid pipelines 12, and a displacement pump 15 arranged between the second fluid pipelines 13.
The number of openings of the first multi-way valve is at least 1 added to the total number of the sand-filled models.
For each sand filling model, when the sand filling model is only provided with one liquid injection port, the liquid injection port is directly connected with the through port of the first multi-way valve through a first fluid pipeline; to every sand-packed model, when this sand-packed model was provided with more than one and annotates the liquid mouth, this sand-packed model each annotate the liquid mouth and pass through first fluid line and the through-port connection of second multi-way valve door, through first fluid line connection between the through-port of second multi-way valve door and the through-port of first multi-way valve door, the manometer is connected between annotating the liquid mouth and the through-port of second multi-way valve door.
The number of the ports of the second multi-port valve is at least equal to the sum of the total number of the liquid injection ports of the corresponding sand filling model and 1.
The production device 3 comprises a third multi-way valve 31, a third fluid line 32 connected between the liquid outlet 23 and the ports of the third multi-way valve 31, a fourth fluid line 33 connected between the liquid outlet container 9 and the ports of the third multi-way valve 31, and a production metering device 34 arranged between the third fluid lines 32.
The number of the openings of the third multi-way valve is at least 1 added to the total number of the sand-filled models.
For each sand-packed model, when the sand-packed model is provided with only one liquid outlet, the liquid outlet 23 is directly connected with the port of the third multi-way valve 31 through the third fluid pipeline 32; for each sand filling model, when the sand filling model is provided with more than one liquid outlet, each liquid outlet 23 of the sand filling model is connected with a port of the fourth multi-way valve 35 through the third fluid line 32, the port of the fourth multi-way valve 35 is connected with the port of the third multi-way valve 31 through the third fluid line 32, and the sampling metering device 34 is connected between the liquid outlet 23 and the port of the fourth multi-way valve 35.
The number of the openings of the fourth multi-way valve is at least 1 added to the total number of the liquid outlets of the corresponding sand filling model.
The liquid outlet container 9 may be placed on an electronic balance 10.
The multi-way valve at the liquid inlet end and the multi-way valve at the liquid outlet end are arranged, so that co-injection and co-production among sand-packed models are realized, and a scene of simultaneous displacement of multiple layers of oil reservoirs is simulated.
All the first multi-way valve, the second multi-way valve, the third multi-way valve, the fourth multi-way valve and the threaded connectors of the pressure gauge and the injection and production metering device are sealed and leak-proof by using thread tapes. The pressure gauges are all of the same type, and the injection and production metering devices are all of the same type.
1. The oil reservoir displacement simulation equipment provided by the embodiment of the utility model comprises a displacement device, a plurality of sand-packed models and a production device, wherein the sand-packed models and the production device are connected in parallel; the sand filling model comprises a cemented lower plate and an upper plate, the upper plate is transparent, and sandstone particles with different meshes are filled between the lower plate and the upper plate; the upper plate is provided with at least one liquid injection port at one end close to the displacement device, and at least one liquid outlet at one end close to the extraction device. The sand filling models connected in parallel are arranged, so that simultaneous displacement of multiple layers of oil reservoirs is simulated, more real actual conditions can be reflected, and the defect that only a single oil reservoir can be simulated is overcome.
2. Through the setting of the position and the quantity of the liquid injection ports and the liquid outlet ports, the real well pattern distribution situation can be well simulated, and a basis is provided for the layout of the well pattern in the actual exploitation process.
3. The sandstone particles filled between the lower plate and the upper plate are sandstone particles with different meshes, so that the heterogeneous condition of the reservoir is simulated.
4. The displacement device, the sand filling models connected in parallel and the extraction device are mutually independent devices, and the models are cleaned after one experiment and then reused; the whole equipment can be disassembled, and all the devices can be repeatedly used and independently replaced.
Referring to fig. 2 and 3, taking 3 sand-packed models connected in parallel, each sand-packed model 2 is provided with 1 liquid injection port 22 and 2 liquid outlet ports 23 as an example, because each sand-packed model is provided with only one liquid injection port, the liquid injection port 22 and the port of the first multi-way valve 11 are directly connected through the first fluid pipeline 12, and the first multi-way valve 11 is specifically a six-way valve; a pressure gauge 14 is arranged between the liquid injection port 22 and a port of the first multi-way valve 11 (a six-way valve), namely between the first fluid pipeline 12; the other ports of the six-way valve are connected with the displacement fluid through a second fluid pipeline 13, and the displacement fluid can be stored in a beaker; because each sand filling model is provided with more than one liquid outlet, each liquid outlet 23 of each sand filling model is connected with a port of the fourth multi-way valve 35 through the third fluid line 32, the port of the fourth multi-way valve 35 is connected with the port of the third multi-way valve 31 through the third fluid line 32, and particularly, the fourth multi-way valve 35 is a three-way valve, and the third multi-way valve 31 is a six-way valve; the sampling metering device 34 is connected between the liquid outlet 23 and the port of the fourth multi-way valve 35; one port of each fourth multi-way valve 35 is connected with the port of the third multi-way valve 31; one port of the third multi-way valve 31 is connected with the liquid outlet container through a fourth fluid line 33.
When the oil reservoir displacement simulation equipment works, the displacement pump 15 sets different injection speeds (for example, 20ml/h) to pump the injection fluid into a six-way valve (a first multi-way valve 11) from a beaker, the injection fluid flows out from three pipelines through the six-way valve and enters an injection port 22 of a sand-packed model after passing through a pressure gauge 14; the injection fluid entering the sand-packed model through the injection port 22 and the displaced crude oil enter a pipeline connected with the injection port 23 through the liquid outlet 23, and flow into a three-way valve (a fourth multi-way valve 35) after passing through the injection and production metering device 34; the fluid flowing through the three-way valves flows into a new six-way valve (a third multi-way valve 31) and then is connected out by a pipeline, and the extracted fluid flows into a beaker (a liquid outlet container 9) with scales; and opening a parallel light source at the bottom and a camera lens of an image and data acquisition processor at the top, setting a computer storage position, and recording the process of displacing the crude oil from the liquid injection end by the injected fluid.
The manufacturing process of the sand-packed models, as shown in fig. 4, may include the following steps:
step S41: and a liquid injection port and a liquid outlet are arranged on the upper plate.
And through holes are respectively drilled at two ends of the upper plate, an injection and production well pattern is simulated, the liquid injection port and the liquid outlet are respectively positioned at two sides of the upper plate, and the number of the liquid injection port and the number of the liquid outlet are determined according to the simulated actual injection and production well pattern. And (3) adding a hollow steel pipe at each drilling position, and then bonding and curing, wherein the outer diameter of the hollow steel pipe can be 2 mm.
Step S42: and spreading glue on one side surface of the upper plate and the lower plate.
The upper layer plate and the lower layer plate are cleaned and then are horizontally placed, glue is uniformly spread on the upward side surface of the upper layer plate and the lower layer plate, and air bubbles in the glue are removed.
Step S43: the sandstone particles are filled.
Mixing sandstone particles (generally quartz sand) with different meshes uniformly in advance; after the glue is spread, the uniformly mixed sandstone particles are spread on the glue surface on one side surface (namely the surface spread with the glue) of the upper plate or the lower plate, which faces upwards, before the glue is dried, so as to simulate a heterogeneous reservoir. Different permeability of the reservoir can be simulated by different spreading density.
Step S44: and finishing the edge water strips.
And removing part of sandstone particles by using tweezers in a set width range of the upper plate or the lower plate on which the sandstone particles are spread, which is close to the liquid injection port end, so as to simulate a side water band. Specifically, in order to better simulate a real displacement scene, the sandstone particle distribution density in the edge water strip is gradually reduced from the boundary of the non-sandstone strip to the end close to the displacement device, namely the edge water strip is gradually generated.
Step S45: and gluing and sealing the upper plate and the lower plate.
Gluing the upper layer plate and the lower layer plate to obtain a sand filling model, sealing the periphery of the sand filling model by using a sealing strip for the second time, and then clamping and pressing the periphery by using a glass clamp to obtain the sealed sand filling model.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing is a detailed description of the utility model and is not intended to limit the scope of the utility model, which is defined by the appended claims, and all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the utility model.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
Claims (10)
1. An oil reservoir displacement simulation device is characterized by comprising a displacement device, a plurality of sand-packed models connected in parallel and a production device;
the sand filling model comprises a cemented lower plate and a transparent upper plate, the upper plate is transparent, and sandstone particles with different meshes are filled between the lower plate and the upper plate;
and at least one liquid injection port is arranged at one end of the upper plate close to the displacement device, and at least one liquid outlet is arranged at one end close to the extraction device.
2. The apparatus of claim 1, wherein an edge water strip is disposed between the lower plate and the upper plate within a set width proximate an end of the displacement device, the edge water strip having a distribution density of sand particles that is less than a distribution density of sand particles in non-edge water strips.
3. The apparatus of claim 1, further comprising a stand;
the supporting part is used for placing the sand filling model, and the supporting part can rotate in a tilting mode through the rotating shaft.
4. The apparatus of claim 1, wherein the plurality of parallel connected sand-packed patterns do not overlap in a horizontal direction.
5. The apparatus according to claim 4, wherein the plurality of sand-packed models connected in parallel are provided at upper portions thereof with image pickup devices;
and light sources are arranged at the lower parts of the sand filling models connected in parallel.
6. The apparatus according to any one of claims 1 to 5, wherein the sand-packed pattern is sealed at its periphery by sealing strips; the periphery of the sand filling model is clamped and pressed by glass clamps.
7. The apparatus of any one of claims 1 to 5, wherein the displacement device comprises a first multi-way valve, a first fluid line connected between the injection port and the port of the first multi-way valve, a second fluid line connected between the displacement fluid and the port of the first multi-way valve, a pressure gauge disposed between the first fluid lines, and a displacement pump disposed between the second fluid lines.
8. The apparatus of claim 7, wherein for each sand pack, when the sand pack is provided with only one injection port, the injection port is directly connected to the port of the first multi-way valve through the first fluid line;
to every sand-packed model, when this sand-packed model was provided with more than one and annotates the liquid mouth, this sand-packed model each annotate the liquid mouth and pass through the through-port connection of first fluid line with the second multi-way valve door, the second multi-way valve door the through-port with pass through between the through-port of first multi-way valve door first fluid line connection, the manometer is connected between annotating the liquid mouth and the through-port of second multi-way valve door.
9. The apparatus of any one of claims 1 to 5, wherein the production means comprises a third multi-way valve, a third fluid line connected between the liquid outlet and the port of the third multi-way valve, a fourth fluid line connected between the liquid outlet container and the port of the third multi-way valve, and a production metering device disposed between the third fluid line.
10. The apparatus of claim 9, wherein, for each sand pack mold, when the sand pack mold is provided with only one outlet port, the outlet port is directly connected to the port of the third multi-way valve via the third fluid line;
aiming at each sand filling model, when the sand filling model is provided with more than one liquid outlet, each liquid outlet of the sand filling model is connected with the port of the fourth multi-way valve through the third fluid line, the port of the fourth multi-way valve is connected with the port of the third multi-way valve through the third fluid line, and the sampling metering device is connected between the liquid outlet and the port of the fourth multi-way valve.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458261A (en) * | 2022-02-17 | 2022-05-10 | 中国石油大学(华东) | Visual physical simulation experiment device for carbon dioxide flooding well pattern displacement of heterogeneous oil reservoir |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458261A (en) * | 2022-02-17 | 2022-05-10 | 中国石油大学(华东) | Visual physical simulation experiment device for carbon dioxide flooding well pattern displacement of heterogeneous oil reservoir |
| NL2034050A (en) * | 2022-02-17 | 2023-08-22 | Univ China Petroleum East China | Carbon dioxide flooding well pattern displacement visualization physical simulation experiment device for heterogeneous oil reservoir |
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