CN102797458B - Three-dimensional simulation device for edge-bottom water reservoir - Google Patents

Abstract

The present invention is a three-dimensional simulation device for oil reservoirs with edge and bottom water. The device includes a body and a detachable movable side wall arranged on the side of the body; The lower part of the gland is provided with a piston; the gland is provided with a plurality of vent holes connected with the accommodation cavity; the side walls around the accommodation chamber are provided with annular grooves that can be sealed to install partitions; the walls of the body and the gland are provided with There are a plurality of hole-shaped functional measurement points, and the functional measurement points are connected to the accommodation cavity under control; the accommodation cavity is filled with granular porous media; the granular porous medium in the accommodation cavity is provided with a plurality of pipe strings for simulating the wellbore. The device can conduct physical simulation experiments on edge-bottom water reservoirs developed with different reservoir thicknesses, different formation dip angles, different displacement methods, and different well patterns and well types, so as to study the oil-water seepage mechanism of the oil and gas reservoirs and carry out the effects of different development methods. evaluate.

Description

Three-dimensional simulation device for edge and bottom water reservoirs

technical field

The invention relates to an experimental device for studying the flow law of multiphase fluids, in particular to a three-dimensional simulation device for simulating edge-bottom water reservoirs with different formation dip angles, different water body types, and multi-well type joint development.

Background technique

The three-dimensional reservoir physical simulation technology can reflect the movement of underground fluid more realistically and is widely used in the petroleum industry. At present, there are many physical simulation experiments for the development of bottom water reservoirs at home and abroad, but the existing two-dimensional experimental devices do not take into account Similarity to the oil field; the existing three-dimensional experimental device does not take into account the observation of the law of bottom water ridges, and cannot measure the law of fluid movement inside the experimental device.

Therefore, relying on years of experience and practice in related industries, the inventor proposes a three-dimensional simulation device for edge-bottom water reservoirs to overcome the defects of the prior art.

Contents of the invention

The purpose of the present invention is to provide a three-dimensional simulation device for edge-bottom water reservoirs to simulate edge-bottom water reservoirs developed under different well patterns and different well types. Through this device, different formation dip angles can be studied under high pressure conditions. The mechanism of oil-water seepage in edge-bottom water reservoirs is analyzed, and the effects of different development methods for bottom-water reservoirs are evaluated at the same time.

The object of the present invention is achieved in this way, a kind of three-dimensional simulation device for edge and bottom water reservoir, this simulation device is made of a cube container; This cube container includes a body and a gland that is arranged on the top of the body, inside the body There is an accommodation chamber, the lower part of the gland is provided with a piston with the same shape as the opening of the accommodation chamber, and the gland is provided with a plurality of vent holes, and the vent holes pass through the piston and conduct with the accommodation chamber; The side wall is a detachable movable side wall. At least one annular groove is provided on the inner wall surface surrounding the side walls of the body. The annular groove is arranged parallel to the bottom surface of the body. plate; the side wall or gland of the main body is provided with a plurality of hole-shaped functional measurement points, and the functional measurement points are connected with the accommodation cavity; the accommodating cavity is filled with granular porous media, and the piston is contained The cavity opening protrudes into the accommodation cavity and is pressed on the granular porous medium; the granular porous medium in the accommodation cavity is provided with a plurality of pipe strings for simulating the wellbore; the inner bottom surface and side of the accommodation cavity A diversion groove is arranged on the wall, and a water injection hole connected with the diversion groove is arranged on the bottom surface and the side wall of the cube container.

In a preferred embodiment of the present invention, the guide groove on the side wall of the body is arranged above or below the annular groove.

In a preferred embodiment of the present invention, a steel plate is provided on the inner bottom surface of the accommodating cavity, and the diversion groove on the bottom surface of the body is arranged on the upper surface of the steel plate, and the diversion groove is provided on the steel plate. A through hole connected to the water injection hole.

In a preferred embodiment of the present invention, the guide groove is a plurality of annular grooves.

In a preferred embodiment of the present invention, the cubic container is arranged on a three-dimensional rotating device.

In a preferred embodiment of the present invention, the granular porous medium is quartz sand or glass beads.

In a preferred embodiment of the present invention, the water injection hole is sequentially connected to a switch valve, a liquid flow meter and a first displacement pump through a pipe body.

In a preferred embodiment of the present invention, a simulated wellbore is connected to a functional measurement point, and is sequentially connected to a switching valve and a second displacement pump through a pipe body.

In a preferred embodiment of the present invention, a pressure measuring device is connected to a functional measuring point; a saturation measuring device is connected to another functional measuring point; the pressure measuring device and the saturation measuring device are connected to a computer.

In a preferred embodiment of the present invention, another simulated wellbore is connected to another functional measurement point, and is sequentially connected to another on-off valve, a back pressure valve, and an oil-water metering device through a pipe body.

From the above, the three-dimensional simulation device for edge-bottom water reservoirs of the present invention can perform high-pressure physical simulation experiments on edge-bottom water reservoirs with different formation dip angles and different water body types, and simulate different well types and different well pattern development methods For edge and bottom water reservoirs, it can monitor and record the oil-water movement law in the model and the pressure distribution law of the model, so as to study the oil-water seepage mechanism in bottom water reservoirs and evaluate the effects of different development methods for bottom water reservoirs.

Description of drawings

The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention. in:

Fig. 1: It is the schematic structural diagram of the three-dimensional simulation device used in the edge-bottom water reservoir according to the present invention.

Fig. 2: It is a schematic diagram of the side structure of the three-dimensional simulation device used in the edge-bottom water reservoir according to the present invention.

Fig. 3: It is a schematic diagram of the diversion tank structure of the three-dimensional simulation device used in the edge-bottom water reservoir according to the present invention.

Fig. 4: A flow chart for preparing the conditions of the bottom water reservoir exploitation experiment using the physical simulation device of the present invention.

Fig. 5: is the flow chart of using the physical simulation device of the present invention to carry out the exploitation experiment of the bottom water reservoir.

Fig. 6: A flow chart for preparing the conditions for using the physical simulation device of the present invention to carry out the exploitation experiment of the edge water reservoir.

Fig. 7: is the flow chart of using the physical simulation device of the present invention to carry out the exploitation experiment of the edge water reservoir.

detailed description

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

As shown in Figures 1 to 7, the present invention proposes a three-dimensional simulation device 100 for edge-bottom water reservoirs, the simulation device 100 is composed of a cubic container, the container has a certain pressure bearing capacity, the cubic container It is arranged on the three-dimensional rotating device 25; the cubic container includes a body 1 and a gland 2 arranged on the top of the body, the body is provided with an accommodation chamber 11, and the lower part of the gland 2 is provided with the same shape as the opening of the accommodation chamber 11. The piston 6, the gland 2 is provided with a plurality of vent holes 7, the vent holes 7 pass through the piston 6 and conduct with the accommodating chamber 11; the side wall of the body 1 is a removable movable side wall 3, At least one annular groove 9 is provided on the inner wall surface around the side walls around the body 1, the annular groove 9 is arranged parallel to the bottom surface of the body 1, and a separator 10 is detachably sealed and embedded in the annular groove 9; The side wall or the gland 2 is provided with a plurality of hole-shaped functional measurement points 4, and the functional measurement points 4 are controlled to conduct with the accommodation cavity 11; the accommodation cavity 11 is filled with granular porous media 24, and the granular porous medium 24 The medium 24 is quartz sand or glass beads; the piston 6 extends into the accommodation cavity from the opening of the accommodation cavity 11 and is pressed on the granular porous medium 24; the granular porous medium 24 in the accommodation cavity 11 is set There are a plurality of pipe strings 21 for simulating a wellbore; diversion grooves 12 are provided on the inner bottom surface and side walls of the accommodating cavity, and the diversion grooves 12 are multiple annular grooves; the bottom surface and side walls of the cubic container A water injection hole 8 communicating with the diversion groove 12 is provided on the top.

As shown in FIG. 1, in this embodiment, the diversion groove 12 on the side wall of the body is arranged above or below the annular groove 9, that is, the diversion groove 12 does not intersect with the annular groove 9, so as not to interfere.

In this embodiment, as shown in FIG. 3 , a steel plate 26 is provided on the inner bottom surface of the accommodating cavity 11 , and the diversion groove 12 on the bottom surface of the body is provided on the upper surface of the steel plate 26 . A through hole 261 communicating with the diversion groove 12 and the water injection hole 8 is provided.

From the above, the three-dimensional simulation device for edge-bottom water reservoirs of the present invention can perform physical simulation experiments on edge-bottom water reservoirs with different formation dip angles and different water body types, and simulate different well types and different well pattern development methods. It can monitor and record the oil-water movement law in the model and the pressure distribution law of the model, so as to study the oil-water seepage mechanism in the bottom water reservoir and evaluate the effect of different development methods of the bottom water reservoir.

Example 1

When the physical simulation device is used for a bottom water oil reservoir exploitation experiment.

As shown in FIG. 4 , in this embodiment, the bottom water injection hole 8 of the body is sequentially connected to an on-off valve 17 , a liquid flow meter 18 and a first displacement pump 16 through a pipe.

A pipe string 21 (for simulating an injection well) is connected to a functional measuring point 4 on the gland, and is sequentially connected to a switch valve 17 , an intermediate container 19 and a second displacement pump 23 through the pipe body.

A pressure measuring device 13 is connected to a functional measuring point 4 on the side wall; a saturation measuring device 14 is connected to another functional measuring point 4 on the side wall; the pressure measuring device 13 and the saturation measuring device 14 are connected with the computer 15 connections.

The air release hole 7 is connected with an air release pipeline through an on-off valve 17 .

As shown in Figure 5, another pipe string 21 (for simulating production well) is connected to another functional measuring point 4 on the gland, and is connected to another on-off valve 17, a back pressure valve 20, An oil-water metering device 22.

The concrete use process of the physical simulation device that the present invention is used for bottom water reservoir is as follows:

1) Sand filling:

The physical simulation device 100 is arranged on the three-dimensional rotation device 25, and the three-dimensional rotation device 25 is an existing structure, the physical simulation device 100 is rotated, the movable side wall 3 of the physical simulation device 100 is placed upwards, and the movable side wall 3. Remove and rotate the bolt 5, so that the piston 6 and the gland 2 are forced to move to the outside of the device 100; connect the water injection hole 8 at the bottom of the cubic container through a pipeline, and connect the other end of the pipeline to a switch valve 17 for simulating bottom water supply; An on-off valve 17 is also provided at the vent hole 7 on the gland 2 to control the internal pressure of the device; the functional measurement point 4 and the pressure measurement device 13 are connected through a pipeline to monitor the pressure variation law inside the physical simulation device 100; The probe of the saturation measurement device 14 is inserted into the physical simulation device 100 through another functional measurement point 4, and the saturation measurement device 14 is used to monitor the fluid movement law in the physical simulation device 100; 21 is inserted into the corresponding functional measurement point 4 to simulate the production well or injection well, and the on-off valve 17 is installed on the pipe string for opening and closing the well; a certain amount of granular porous The medium 24 is compacted and filled according to the experimental requirements; the movable side wall 3 is covered; the bolt 5 is rotated so that the piston 6 and the gland 2 are forced to move toward the accommodating cavity 11, and the granular porous medium 24 is further compacted.

2) Experiment preparation stage:

Open the on-off valve 17 at the vent hole 7 to keep the accommodating chamber 11 connected to the atmosphere; use the pipeline to connect the on-off valve 17 at the water injection hole 8 to the outlet of the liquid flow meter 18, and its inlet to the outlet of the first displacement pump 16 The inlet port of the first displacement pump 16 is connected with experimental water. Open the on-off valve 17 at the water injection hole 8, open the first displacement pump 16, set the displacement pressure so that the first displacement pump 16 maintains a constant pressure and inject the experimental water into the accommodating chamber 11 until the thickness of the bottom water reaches the experimental pressure. Requirement, close the switch valve 17 at the first displacement pump 16 and the water injection hole 8 in order.

Keep the on-off valve 17 at the bleed hole 7 in an open state, connect the on-off valve 17 at the pipe string 21 (for simulating the injection well) to the outlet of the intermediate container 19, and the inlet of the intermediate container 19 to the second displacement pump 23 through pipelines connected; open the switch valve 17 at the pipe string 21, inject saturated simulated oil into the physical simulation device 100 at a certain injection rate through the second displacement pump 23, until oil is seen in the 7 vent holes, and close the switch at the 7 vent holes Valve 17, continue to inject a certain amount of simulated oil until the pressure in the accommodation chamber 11 reaches the experimental requirements, and record the average pressure in the accommodation chamber 11 at this time, close the on-off valve 17 at the injection well, and disconnect the injection well 21 is connected with the intermediate container 19.

Open the first displacement pump 16 connected to the water injection hole 8, set the displacement pressure of the first displacement pump 16 to be equal to the average pressure in the accommodation chamber 11, open the switch valve 17 at the water injection hole 8, record the liquid flow meter 18 until the liquid flow rate is zero, at this time the pressure balance between the accommodation chamber 11 and the first displacement pump 16 is reached, and the experimental conditions are ready.

3) Production simulation:

Keep the first displacement pump 16 connected to the water injection hole 8 in an open state; connect the inlet end of the back pressure valve 20 to the wellbore pipeline of the production well, and connect the outlet end of the back pressure valve 20 to the oil-water metering device 22; during the experiment, open the well By switching the valve 17 at the eye pipeline and setting the pressure at the inlet of the back pressure valve 20, the development process of production wells can be simulated. Record the readings on the oil-water metering device 22 to measure the amount of oil and water produced by the production well, and record the readings on the liquid flow meter 18 to measure the water intrusion of the bottom water reservoir. The law of water ridge advance.

The three-dimensional simulation device for edge-bottom water reservoirs of the present invention can perform physical simulation experiments on edge-bottom water reservoirs with different formation dip angles and different water body types, and simulate edge-bottom water oil reservoirs under different well types and different well pattern development modes It can monitor and record the oil-water movement law in the model and the pressure distribution law of the model, so as to study the oil-water seepage mechanism in the bottom water reservoir and evaluate the effect of different development methods of the bottom water reservoir.

Example 2

This embodiment is to use the physical simulation device to carry out the experimental simulation of edge water oil reservoir exploitation.

The structure and principle of this embodiment are basically the same as those of Embodiment 1, the difference being that, as shown in Figure 2, in this embodiment, in the ring groove 9 provided on the side walls around the body, a partition is sealed and embedded 10. The partition plate 10 divides the accommodating cavity 11 into two sealed spaces (upper and lower) (making the thickness of the accommodating cavity variable). As shown in Figure 6 and Figure 7, in this embodiment, the switch valve 17, a liquid flow meter 18 and a first displacement pump 16 are sequentially connected to the side wall water injection hole 8 of the body by the pipe body, And the water injection hole 8 is located above the ring groove 9 .

The concrete use process of the physical simulation device that the present invention is used for edge water reservoir is as follows:

1) Sand filling:

The physical simulation device 100 is arranged on the three-dimensional rotating device 25, the three-dimensional rotating device 25 is an existing structure, the physical simulation device 100 is rotated, the movable side wall 3 of the physical simulation device 100 is placed upwards, and the movable The side wall 3 is removed, and the bolt 5 is rotated so that the piston 6 and the gland 2 are forced to move to the outside of the device 100; the partition plate 10 is inserted along the ring groove 9 on the wall surface around the accommodating chamber 11, and the pipeline is used to connect the Water injection hole 8, and on-off valve 17 is provided at this pipeline; On-off valve 17 is also provided on vent hole 7 on gland 2, is used for controlling the pressure in the device; Connect function measuring point 4 and pressure measuring device through pipeline 13. It is used to monitor the pressure change law inside the physical simulation device 100; the probe of the saturation measurement device 14 is inserted into the physical simulation device 100 through another functional measurement point 4, and the saturation measurement device 14 is used to monitor the physical simulation device 100 The internal fluid movement law; the pipe string 21 with holes drilled on the pipe wall is inserted into the corresponding functional measurement point 4, which is used to simulate the production well, and the switch valve 17 is installed on the pipe string for the switch well; to the partition 10 A certain amount of granular porous medium 24 is filled in the upper sealing space 111 of the accommodation chamber 11 between the gland 2, and the medium is compacted and filled according to the experimental requirements; the movable side wall 3 is placed on the cover; the bolt 5 is rotated so that the piston 6 and the gland 2 is forced to move toward the accommodation cavity 11, further compacting the granular porous medium 24; using the three-dimensional rotating device 25, the gland 2 of the physical simulation device 100 is placed upward; and using the rotating device 25, the model is rotated A certain angle to simulate the formation dip.

2) Experiment preparation stage:

Open the on-off valve 17 at the vent hole 7 to keep the accommodating cavity 11 connected to the atmosphere; use the pipeline to connect the on-off valve 17 at the water injection hole 8 on the side wall to the outlet of the liquid flow meter 18, and its inlet to the first displacement The outlet of the pump 16 is connected, and the inlet of the first displacement pump 16 is connected with experimental water. Open the switch valve 17 at the water injection hole 8 on the side wall, turn on the first displacement pump 16, set the displacement pressure so that the first displacement pump 16 maintains a constant pressure, and inject the experimental water into the accommodating chamber 11 until the edge water When the thickness meets the experimental requirements, the first displacement pump 16 and the on-off valve 17 at the water injection hole 8 are closed in sequence.

Keep the on-off valve 17 at the bleed hole 7 in an open state, connect the on-off valve 17 at the pipe string 21 to the outlet end of the intermediate container 19 through the pipeline, and the inlet end of the intermediate container 19 is connected to the second displacement pump 23; open the pipe string 21 Inject saturated simulated oil into the physical simulation device 100 at a certain injection rate through the second displacement pump 23 until oil is seen in the vent hole 7, close the switch valve 17 in the vent hole 7, and continue to inject a certain amount of Simulate oil until the pressure in the accommodation chamber 11 reaches the experimental requirements, and record the average pressure in the accommodation chamber 11 at this time, close the on-off valve 17 at the pipe string 21, and disconnect the pipe string 21 from the intermediate container 19.

Open the first displacement pump 16 connected to the water injection hole 8 on the side wall, set the displacement pressure of the first displacement pump 16 to be equal to the average pressure in the accommodation chamber 11, and open the switch valve at the water injection hole 8 on the side wall 17. Record the data on the liquid flow meter 18 until the passing liquid flow rate is zero, at this time the pressure balance between the accommodation chamber 11 and the first displacement pump 16 is reached, and the experimental conditions are ready.

3) Production simulation:

Keep the first displacement pump 16 connected to the water injection hole 8 on the side wall in an open state; connect the inlet end of the back pressure valve 20 to the wellbore pipeline of the pipe string 21, and connect the outlet end of the back pressure valve 20 to the oil-water metering device 22; experiment When opening the on-off valve 17 at the wellbore pipeline and setting the pressure at the inlet port of the back pressure valve 20, the development process of oil production by the oil production well 21 in the edge water reservoir can be simulated. Record the readings on the oil-water metering device 22 to measure the amount of oil and water produced by the oil production well 21, and record the readings on the liquid flow meter 18 to measure the water intrusion of the edge water reservoir, which can be observed through the saturation measuring device 14 Bottom water ridge advance law.

Other beneficial effects of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

The above descriptions are only illustrative specific implementations of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concepts and principles of the present invention shall fall within the protection scope of the present invention.

Claims (6)

1. for a three-dimensional simulation device for bottom and edge water, it is characterized in that: this analogue means is made up of a cubic container; This cubic container comprises the gland that a body and is arranged at bodies top, accommodating cavity is provided with in body, gland bottom is provided with the piston identical with accommodating cavity opening shape, and described gland is provided with multiple air vent, and described air vent runs through piston and accommodating cavity conducting; One sidewall of described body is the movable side wall that can dismantle, and the internal face around described body surrounding sidewall is at least provided with an annular groove, and the bottom surface of described annular groove and body be arranged in parallel, and in described annular groove, removably sealing is embedded dividing plate; The sidewall of body or gland are provided with multiple poroid functional measurement point, and described functional measurement point and accommodating cavity control conducting; Be full of granular porous medium in described accommodating cavity, described piston to be stretched in accommodating cavity by accommodating cavity opening part and is installed with on granular porous medium; Multiple tubing string for simulation wellbore hole is provided with in granular porous medium in described accommodating cavity; Described accommodating cavity inner bottom surface and sidewall are provided with guiding gutter, and the bottom surface of cubic container and sidewall are provided with the water injection hole with guiding gutter conducting; Guiding gutter on described body sidewall is arranged on above or below described annular groove; Described accommodating cavity inner bottom surface is provided with a steel plate, and the guiding gutter on described body bottom surface is the upper surface being arranged on steel plate, and described steel plate is provided with the open-work with guiding gutter and water injection hole conducting; Described guiding gutter is many ring-shaped grooves; Described cubic container is arranged on three-dimensional rotation device.

2., as claimed in claim 1 for the three-dimensional simulation device of bottom and edge water, it is characterized in that: described granular porous medium is quartz sand or bead.

3., as claimed in claim 1 for the three-dimensional simulation device of bottom and edge water, it is characterized in that: described water injection hole is linked in sequence in a switch valve, a liquid flow instrument and one first displacement pump by body.

4., as claimed in claim 1 for the three-dimensional simulation device of bottom and edge water, it is characterized in that: a simulation wellbore hole connects a functional measurement point, and be linked in sequence in a switch valve and the second displacement pump by body.

5., as claimed in claim 1 for the three-dimensional simulation device of bottom and edge water, it is characterized in that: a device for pressure measurement is connected to a functional measurement point; One saturation measuring device is connected to another functional measurement point; Described device for pressure measurement is connected with computer with saturation measuring device.

6., as claimed in claim 1 for the three-dimensional simulation device of bottom and edge water, it is characterized in that: another simulation wellbore hole is connected to another functional measurement point, and be linked in sequence in another switch valve, a back-pressure valve, an oil-water metering device by body.