CN113389544B - Visual model for boundary water reservoir water invasion simulation experiment - Google Patents
Visual model for boundary water reservoir water invasion simulation experiment Download PDFInfo
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- CN113389544B CN113389544B CN202110777088.8A CN202110777088A CN113389544B CN 113389544 B CN113389544 B CN 113389544B CN 202110777088 A CN202110777088 A CN 202110777088A CN 113389544 B CN113389544 B CN 113389544B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention relates to a visual model for an edge water reservoir water invasion simulation experiment, which comprises a transparent body and a plurality of simulation mineshafts. The transparent body comprises a top plate, a bottom plate and a plurality of side plates, and the top plate and the bottom plate are detachably connected with the side plates. The transparent body is closed, and the inside of the transparent body is filled with granular porous media. Be provided with a plurality of mounting holes on the roof, the simulation pit shaft is installed in the mounting hole, and the simulation pit shaft is located the inside of transparent type body. The side plate is provided with a plurality of side water invasion holes, the side water invasion holes are used for injecting water provided by the water supply device into the transparent body, water invasion simulation experiments are carried out, a visual model is adopted, the oil-water movement streamline and the residual oil enrichment position in a simulation reservoir can be clearly observed, the side water reservoir water invasion rule, the oil well production dynamic rule and the residual oil distribution rule are better acquired, and corresponding side water reservoir treatment measures are explored.
Description
Technical Field
The invention relates to the technical field of visual experimental model design, in particular to a visual model for an edge water reservoir water invasion simulation experiment.
Background
The edge water oil reservoir has the characteristic of wide contact area between the oil-containing area and the edge water, which is not only a place where the edge water oil reservoir is superior to other oil reservoirs in the aspect of development, but also a place where the edge water oil reservoir is difficult to develop. The contact area between the oil reservoir and the boundary water is large, so that the capability of the boundary water invading the oil reservoir is greatly enhanced, the stratum energy consumed by crude oil exploitation can be supplemented from the boundary water in time, and most of the development process of the boundary water oil reservoir shows the characteristic of sufficient energy. However, the existence of the edge water can cause the water production problem in oil well production, and the characteristics of early water breakthrough, short waterless oil recovery period, quick water content rise after water breakthrough and even violent flooding appear, so that the lower recovery ratio of the oil reservoir is caused, and the exploitation risk of the oil field is increased.
At present, the main technical difficulty in developing the side water oil reservoir is how to prevent side water from invading to cause flooding, which is one of the more troublesome problems in oil field development worldwide. The influence factors of the water invasion of the edge water reservoir can be objectively and truly researched through a physical simulation experiment, the water invasion rule of the edge water reservoir, the oil well production dynamic rule and the residual oil distribution rule are obtained, and corresponding edge water reservoir treatment measures are explored.
The edge water reservoir water invasion physical simulation technology is widely applied to oil fields, and can truly reflect the motion law of underground fluid when water invasion occurs. At present, physical simulation devices for boundary water reservoir development are researched at home and abroad, but the existing devices cannot realize visualization or can only realize partial visualization, so that an experimental model capable of realizing complete visualization is urgently needed.
Disclosure of Invention
The invention aims to provide a visual model for an edge water reservoir water invasion simulation experiment, which realizes comprehensive visualization so as to directly observe saturated oil and a displacement process.
In order to achieve the purpose, the invention provides the following scheme:
a visual model for an edge water reservoir water invasion simulation experiment comprises a transparent body and a plurality of simulation mineshafts; the transparent body comprises a top plate, a bottom plate and a plurality of side plates, and the top plate and the bottom plate are detachably connected with the side plates; the transparent body is closed, and granular porous media are filled in the transparent body;
a plurality of mounting holes are formed in the top plate; the simulated mineshaft is arranged in the mounting hole and is positioned inside the transparent body;
a plurality of side water intrusion holes are formed in the side plate; the side water invasion hole is used for injecting water provided by the water supply device into the transparent type body to carry out a water invasion simulation experiment.
Optionally, the model further comprises two pressing caps sleeved at two ends of the transparent body; the two pressing caps are respectively matched with the side plates, and both the two pressing caps are in contact with the top plate and the bottom plate; the two pressing caps are fixedly connected;
the two pressing caps are used for pressing the transparent body.
Optionally, the bottom surface of the bottom plate and the bottom surface of the side plate are in the same horizontal plane, and the top surface of the top plate and the top surface of the side plate are in the same horizontal plane;
a plurality of connecting convex ridges are fixedly arranged on the side wall of the bottom plate; the bottom of the side plate and the position corresponding to each connecting convex edge are provided with connecting grooves; the bottom plate and the side plate are detachably connected through the splicing of the connecting convex edges and the connecting grooves;
the top of the side plate is fixedly provided with a plurality of mounting convex edges; mounting grooves are formed in the side wall of the top plate at positions corresponding to the mounting convex edges; the top plate and the side plate are detachably connected through the installation convex edges and the installation grooves in an inserted mode.
Optionally, sealing gaskets are mounted on the connecting convex edges and the mounting convex edges; the sealing gaskets are arranged at the splicing positions of the two adjacent side plates.
Optionally, a first groove is formed in the outer side surface of the side plate, a water supply ring is fixedly installed in the first groove, a water supply cavity is formed in the water supply ring, and the water supply cavity is communicated with the side water intrusion hole; the water supply cavity is used for receiving water provided by the water supply device.
Optionally, at least one of the water supply rings is fixedly connected with a water inlet connector, and the water inlet connector is matched with a through hole arranged on the pressing cap; a water inlet hole is formed in the water inlet connector and communicated with the water supply cavity;
the water supply cavities on all the side plates are communicated; the water inlet hole is used for receiving water provided by the water supply device.
Optionally, a second groove is formed in the pressing cap; the second groove is matched with the water supply ring.
Optionally, a plurality of side water intrusion holes formed in the side plate are distributed at equal intervals along a straight line; the inner wall of the side plate is also provided with a transverse diversion trench and a longitudinal diversion trench; the transverse diversion trench and the longitudinal diversion trench are connected with the side water invasion hole.
Optionally, a sand net is arranged on the inner wall of the side plate.
Optionally, each simulated wellbore is provided with a switch; a plurality of the simulated wellbores are used for forming different forms of well patterns under the control of the switches corresponding to the simulated wellbores.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a visual model for an edge water reservoir water invasion simulation experiment, which comprises a transparent body and a plurality of simulation mineshafts. The transparent body comprises a top plate, a bottom plate and a plurality of side plates, and the top plate and the bottom plate are detachably connected with the side plates. The transparent body is closed, and the inside of the transparent body is filled with granular porous media. Be provided with a plurality of mounting holes on the roof, the simulation pit shaft is installed in the mounting hole, and the simulation pit shaft is located the inside of transparent type body. The side plate is provided with a plurality of side water invasion holes, the side water invasion holes are used for injecting water provided by the water supply device into the transparent body, water invasion simulation experiments are carried out, a visual model is adopted, the oil-water movement streamline and the residual oil enrichment position in a simulation reservoir can be clearly observed, the side water reservoir water invasion rule, the oil well production dynamic rule and the residual oil distribution rule are better acquired, and corresponding side water reservoir treatment measures are explored.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a visualization model provided in embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of a visualization model provided in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a press cap provided in embodiment 1 of the present invention;
fig. 4 is a schematic cross-sectional view of a sealing gasket provided in example 1 of the present invention.
Description of the symbols:
1-pressing a cap; 2-bolt; 3-a bottom plate; 4-a top plate; 5-side plate; 6-mounting holes; 7-a first groove; 8-water supply ring; 9-a water supply cavity; 10-edge water intrusion holes; 11-water inlet joint; 12-water inlet holes; 13-a second groove; 14-a through hole; 15-connecting the convex edges; 16-a connecting trough; 17-mounting a convex edge; 18-a mounting groove; 19-a sealing gasket; 20-a gasket body; 21-an outer ring; 22-diversion trench; 23-a sand screen; 24-simulating a wellbore.
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 invention aims to provide a visual model for an edge water reservoir water invasion simulation experiment, which realizes comprehensive visualization and clearly observes an oil-water movement route and a residual oil enrichment position in a simulated reservoir.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1:
the embodiment is used for providing a visualization model for an edge water reservoir water invasion simulation experiment, and the visualization model comprises a transparent body and a plurality of simulation mineshafts 24, as shown in fig. 1 and 2. The transparent body comprises a top plate 4, a bottom plate 3 and a plurality of side plates 5, wherein the side plates 5 are symmetrically arranged at two ends of the bottom plate 3, and the number of the side plates 5 can be multiple or one. As shown in fig. 1, the structure schematic diagram of the transparent body is a cuboid, at this time, there are 6 side plates 5, two side surfaces on the cuboid transparent body, which are matched with two pressing caps 1, only include one side plate 5, and the rest two side surfaces are obtained by splicing two side plates 5. The top plate 4 and the bottom plate 3 are detachably connected with the side plate 5.
The transparent body is closed, and the inside of the transparent body is filled with granular porous media. In the experimental process, the transparent body is generally filled with the granular porous medium, the filled granular porous medium is compacted, and the degree of compaction is adjusted according to the experimental requirements. A quantity of granular porous media may also be filled as needed for the experiment.
A plurality of mounting holes 6 are formed in the top plate 4, the simulation mineshaft 24 is mounted in the mounting holes 6, the simulation mineshaft 24 is located in the transparent body, and specifically, the simulation mineshaft 24 is located in the granular porous medium. A plurality of edge water intrusion holes 10 are formed in the side plate 5, and the edge water intrusion holes 10 are used for injecting water provided by the water supply device into the transparent type body to carry out water intrusion simulation experiments.
In order to further compress the transparent body, the visual model of the embodiment further comprises two pressing caps 1 sleeved at two ends of the transparent body, as shown in fig. 3, the two pressing caps 1 are respectively matched with the side plates 5, and the two pressing caps 1 are respectively contacted and matched with the top plate 4 and the bottom plate 3. Two pressure caps 1 fixed connection, specifically two are pressed and are connected through bolt 2 between the cap 1, and two pressure caps 1 are used for compressing tightly the transparent type body, make the transparent type body connect closely, keep airtight border all the time, prevent that the pressure that produces from pressing scattered transparent type body in the experimentation.
In order to realize that water supply installation invades hole 10 to limit water and supplies water, first recess 7 has all been seted up on the lateral surface of each curb plate 5 of this embodiment, fixed mounting has water supply circle 8 in first recess 7, water supply chamber 9 has been seted up in the water supply circle 8, water supply chamber 9 is linked together with limit water invasion hole 10, water supply chamber 9 is used for receiving the water that water supply installation provided, and then supply water chamber 9 with the help of setting on every curb plate 5, water supply circle 8 and first recess 7, supply water to limit water invasion hole 10 through supplying water to water supply chamber 9, the process of invading to limit water is simulated, carry out water and invade the simulation experiment. Preferably, the first groove 7 is linear, the length of the first groove 7 is the same as that of the side plate 5, and the first groove 7 is perpendicular to the side edge of the side plate 5.
If only set up water supply chamber 9, water supply circle 8 and first recess 7, then need supply water to each curb plate 5 respectively, in order to further simplify the water supply process, this embodiment is fixedly connected with water supply connector 11 on the water supply circle 8 with pressing cap 1 matched with curb plate 5, water supply connector 11 with press the 14 looks adaptations of the through-hole of seting up on the cap 1, for example adopt the adaptation mode of embedding water supply connector 11 to through-hole 14, set up inlet opening 12 in the water supply connector 11, inlet opening 12 is linked together with water supply chamber 9. The water supply cavities 9 on all the side plates 5 are communicated, and the water inlet holes 12 are used for receiving water provided by a water supply device. Because the water supply cavities 9 of all the side plates 5 are communicated, water can be supplied to the water supply cavities 9 of all the side plates 5 only by supplying water to the water inlet holes 12 through the water supply device, and further water can be supplied to all the side water intrusion holes 10. Preferably, one of the side plates 5 matched with the pressing cap 1 is randomly selected, and the water supply ring 8 of the selected side plate 5 is fixedly connected with the water inlet connector 11, so that the water supply process can be further simplified.
If only set up first recess 7 and hold water supply ring 8, then the thickness of curb plate 5 can be than thicker, and then can increase the cost of material, so this embodiment has seted up second recess 13 on pressing cap 1, second recess 13 and water supply ring 8 looks adaptation, and then hold water supply ring 8 jointly through first recess 7 on the curb plate 5 and second recess 13 on the pressure cap 1 to reduce and press the thickness of cap 1 matched with curb plate 5.
In order to further improve the effect of limit water simulation, a plurality of limit water invasion hole 10 that sets up on the curb plate 5 of this embodiment is along the equidistant distribution of straight line, and is concrete, and a plurality of limit water invasion hole 10 is along the equidistant distribution of first recess 7, and then the water supply chamber 9 of being convenient for supplies water for limit water invasion hole 10. And still be provided with horizontal and fore-and-aft guiding gutter 22 on the inner wall of curb plate 5, mark as horizontal guiding gutter and vertical guiding gutter, horizontal guiding gutter and vertical guiding gutter all are connected with limit water invasion hole 10, and then carry out the water conservancy diversion to the transparent type that flows into through limit water invasion hole 10, improve limit water simulation effect. Preferably, each side water intrusion hole 10 is correspondingly provided with a transverse diversion trench and a longitudinal diversion trench, and the side water intrusion hole 10 is located at the intersection of the transverse diversion trench and the longitudinal diversion trench, so that the diversion effect can be further improved.
In order to realize the detachable connection of the bottom plate 3 and the top plate 4 with the side plate 5, the present embodiment provides a specific detachable connection mode, the bottom surface of the bottom plate 3 and the bottom surface of the side plate 5 are at the same horizontal plane, the top surface of the top plate 4 and the top surface of the side plate 5 are at the same horizontal plane, that is, the bottom surface of the bottom plate 3 is flush with the bottom surface of the side plate 5, and the top surface of the top plate 4 is flush with the top surface of the side plate 5. Protruding arris 15 are connected to fixedly connected with a plurality of on the lateral wall of bottom plate 3, and connecting groove 16 has all been seted up with each to the bottom of curb plate 5 and the corresponding position department of connecting protruding arris 15, and bottom plate 3 and curb plate 5 can dismantle the connection through the grafting of connecting between protruding arris 15 and the connecting groove 16. The top of curb plate 5 is provided with the shoulder, the protruding arris 17 of a plurality of installation of fixedly connected with on the shoulder, all seted up mounting groove 18 with the corresponding position department of each protruding arris 17 of installation on the lateral wall of roof 4, and grafting between roof 4 and curb plate 5 through the protruding arris 17 of installation and the mounting groove 18 can be dismantled and be connected. Two adjacent side plates 5 can be fixedly connected or detachably connected. When two adjacent side plates 5 are detachably connected, the detachable connection can be performed in the manner of arranging the protruding ribs and the grooves.
Further, in order to ensure the sealing effect of the transparent body, sealing gaskets 19 are respectively arranged on the connecting convex edges 15 and the mounting convex edges 17, and the sealing gaskets 19 are also arranged at the splicing positions of two adjacent side plates 5. As shown in fig. 4, the sealing washer 19 includes a washer body 20 and an outer ring 21 disposed on both sides of the washer body 20, the washer body 20 and the outer ring 21 are integrally formed, and the outer ring 21 may be a fine-bubble outer ring.
A sand screen 23 is arranged on the inner wall of the side plate 5 to allow only water and oil to pass through the side plate 5 and to prevent the granular porous media from passing through the side plate 5. The sand net 23 may cover the whole side plate 5, or may be provided only at a position where the edge water on the side plate 5 intrudes into the hole 10.
The current experimental model for carrying out the boundary water reservoir experiment can only realize a single well pattern, and in order to solve the problem, each simulation shaft 24 of the embodiment is provided with a switch. The plurality of simulated mineshafts 24 are used for forming well patterns in different forms under the control of the switches corresponding to the simulated mineshafts 24, and the simulated mineshafts 24 positioned at different positions in the transparent body are opened or closed, so that various different well pattern forms can be realized, and the influence of water invasion on oil reservoir production when water and oil are hidden in different well pattern development modes is researched.
The following describes a usage process of the visualization model for the boundary water reservoir water invasion simulation experiment provided in this embodiment. When the device is used, the connecting convex edges 15 on the bottom plate 3 are inserted into the connecting grooves 16 on the side plates 5, the bottom plate 3 and the side plates 5 are spliced, the sand net 23 is attached to the inner walls of the side plates 5, then a certain amount of granular porous media are filled in a space enclosed by the bottom plate 3 and the side plates 5, and the media are compacted according to experimental requirements. The top plate 4 is then placed over the shoulders of the side plates 5 and the mounting raised ribs 17 are inserted into the mounting grooves 18 to complete the mounting of the transparent body. Then in will be fixed with the water supply circle 8 of water supply connector 11 and install the first recess 7 on curb plate 5, then install and press cap 1, make water supply connector 11 pass through the through-hole 14 on pressing cap 1 to utilize bolt 2 to connect two and press cap 1, make and press cap 1 and curb plate 5 to be in interference fit state, utilize simultaneously to press cap 1 to carry out spacing to bottom plate 3 and roof 4, accomplish the equipment of visual model.
When the boundary water reservoir water invasion simulation experiment is carried out, the water supply device is communicated with the water inlet joint 11. The experimental water and the saturated simulation oil are sequentially injected into the granular porous medium in the visual model through the simulation well bore 24 by using the water supply device, and the crude oil is aged. And then, starting a side water invasion experiment of the side water reservoir by using the water supply device, and measuring the water consumption and the oil-water output of the experiment by using the measuring system. During the experiment, the oil-water migration condition can be observed through the transparent body, and the recording is carried out by using an imaging device. In the experiment, the opening and closing of the outlet valves of different simulation mineshafts 24 are adjusted, so that different types of well pattern deployment are realized.
The purpose of this embodiment is to provide a visual model for boundary water oil reservoir water invades simulation experiment, can not only realize comprehensive visualization in order to observe saturated oil and displacement process, can also observe the plane change that changes the well pattern or take the fluid streamline after the increase production measure simultaneously, overcome prior art's defect. The visual model for simulation experiment is invaded to limit water reservoir water that this embodiment provided is visualization device, can clearly observe simulation reservoir in oil and water movement streamline and surplus oil enrichment position, and the simulation pit shaft 24 of different positions is opened or closed to the accessible, can realize multiple different well pattern forms to research limit end water oil is invaded to water under the different well pattern development modes and is produced the influence of oil deposit.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (5)
1. A visual model for an edge water reservoir water invasion simulation experiment is characterized by comprising a transparent body and a plurality of simulation mineshafts; the transparent body comprises a top plate, a bottom plate and a plurality of side plates, and the top plate and the bottom plate are detachably connected with the side plates; the transparent body is closed, and granular porous media are filled in the transparent body;
a plurality of mounting holes are formed in the top plate; the simulated shaft is arranged in the mounting hole and is positioned in the transparent body;
a plurality of side water intrusion holes are formed in the inner side surface of the side plate; the side water invasion hole is used for injecting water provided by the water supply device into the transparent body to carry out a water invasion simulation experiment;
the bottom surface of the bottom plate and the bottom surfaces of the side plates are positioned at the same horizontal plane, and the top surface of the top plate and the top surfaces of the side plates are positioned at the same horizontal plane; the side wall of the bottom plate is fixedly provided with a plurality of connecting convex ridges; the bottom of the side plate and the position corresponding to each connecting convex edge are provided with connecting grooves; the bottom plate and the side plate are detachably connected through the splicing of the connecting convex edges and the connecting grooves; the top of the side plate is fixedly provided with a plurality of mounting convex edges; mounting grooves are formed in the side wall of the top plate at positions corresponding to the mounting convex edges; the top plate and the side plate are detachably connected through the insertion of the mounting convex edges and the mounting grooves;
the model also comprises two pressing caps sleeved at two ends of the transparent body; the two pressing caps are respectively matched with the side plates, and both the two pressing caps are in contact with the top plate and the bottom plate; the two pressing caps are fixedly connected; the two pressing caps are used for pressing the transparent body;
a first groove is formed in the outer side face of the side plate, a water supply ring is fixedly installed in the first groove, a water supply cavity is formed in the water supply ring and is communicated with the edge water intrusion hole, and the edge water intrusion holes are distributed at equal intervals along the first groove; a water inlet connector is fixedly connected to the water supply ring of one side plate matched with the pressing cap, and the water inlet connector is matched with a through hole formed in the pressing cap; a water inlet hole is formed in the water inlet connector and communicated with the water supply cavity; the water supply cavities on all the side plates are communicated; the water inlet hole is used for receiving water provided by the water supply device;
a second groove is formed in the pressing cap; the second groove is matched with the water supply ring.
2. The mold according to claim 1, wherein a sealing gasket is mounted on each of said connecting projecting ribs and said mounting projecting ribs; the sealing gaskets are arranged at the splicing positions of the two adjacent side plates.
3. The model according to claim 1, wherein a plurality of side water intrusion holes formed in the side plates are distributed at equal intervals along a straight line; the inner wall of the side plate is also provided with a transverse diversion trench and a longitudinal diversion trench; the transverse diversion trench and the longitudinal diversion trench are connected with the side water invasion hole.
4. The pattern of claim 1 wherein the side panels have a sand screen disposed on the inner wall thereof.
5. The model of claim 1, wherein each of said simulated wellbores is provided with a switch; a plurality of the simulated wellbores are used for forming different forms of well patterns under the control of the switches corresponding to the simulated wellbores.
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| CN114542035A (en) * | 2022-03-28 | 2022-05-27 | 中国石油大学(华东) | High-inclination-angle side-water oil reservoir well pattern injection-production visual simulation device and method |
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