CN114016997B - Heterogeneous oil reservoir development and adjustment simulation experiment device and method - Google Patents
Heterogeneous oil reservoir development and adjustment simulation experiment device and method Download PDFInfo
- Publication number
- CN114016997B CN114016997B CN202010684030.4A CN202010684030A CN114016997B CN 114016997 B CN114016997 B CN 114016997B CN 202010684030 A CN202010684030 A CN 202010684030A CN 114016997 B CN114016997 B CN 114016997B
- Authority
- CN
- China
- Prior art keywords
- model
- injection
- well
- discrete
- reservoir
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004088 simulation Methods 0.000 title claims abstract description 61
- 238000011161 development Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000002347 injection Methods 0.000 claims abstract description 117
- 239000007924 injection Substances 0.000 claims abstract description 117
- 238000004519 manufacturing process Methods 0.000 claims abstract description 73
- 238000006073 displacement reaction Methods 0.000 claims abstract description 56
- 238000009826 distribution Methods 0.000 claims abstract description 51
- 239000012530 fluid Substances 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 230000000704 physical effect Effects 0.000 claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 32
- 230000008569 process Effects 0.000 claims abstract description 28
- 238000000605 extraction Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004576 sand Substances 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 239000003921 oil Substances 0.000 claims description 95
- 235000019198 oils Nutrition 0.000 claims description 92
- 238000002474 experimental method Methods 0.000 claims description 25
- 238000011160 research Methods 0.000 claims description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 12
- 238000005481 NMR spectroscopy Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 6
- 239000003208 petroleum Substances 0.000 claims description 6
- 238000003809 water extraction Methods 0.000 claims description 6
- 235000019476 oil-water mixture Nutrition 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- 238000002591 computed tomography Methods 0.000 claims description 4
- 239000010779 crude oil Substances 0.000 claims description 4
- 238000010223 real-time analysis Methods 0.000 claims description 4
- 238000009738 saturating Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000008398 formation water Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 21
- 238000010586 diagram Methods 0.000 description 7
- 230000035699 permeability Effects 0.000 description 7
- 239000010410 layer Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000005465 channeling Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013421 nuclear magnetic resonance imaging Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/04—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of buildings
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geophysics (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention provides a device and a method for a heterogeneous oil reservoir development and adjustment simulation experiment, wherein the device comprises an injection system, a discrete model system, a production metering system and a data acquisition and test system, and the injection system provides displacement fluid; the discrete model system comprises a plurality of core holders, wherein cores or sand-filled models with different physical properties are filled in the core holders of a specific type so as to perform displacement simulation experiments; the extraction metering system performs gas-liquid separation and yield metering of the extracted fluid; the data acquisition and test system records pressure, saturation and temperature data of each point of the model in the experimental process, and analyzes the data in real time through a computer. The device and the method for simulating the development and adjustment of the heterogeneous oil reservoirs can realize the simulation of the water injection or gas injection development and adjustment of various heterogeneous oil reservoirs, analyze the distribution of residual oil before and after the simulated development, and provide reliable basis for the development scheme and the forecast development effect of the actual oil reservoirs.
Description
Technical Field
The invention relates to the technical field of oil and gas field development, in particular to an experimental device and method for heterogeneous oil reservoir development and adjustment simulation.
Background
Reservoir heterogeneity is one of the important factors affecting reservoir development. Because of the fluidity difference between the injection fluid and the crude oil in the stratum, the injection fluid tends to flow along the permeability dominant channel preferentially in the water injection and gas injection development process, the high permeable layer is flooded prematurely or gas is channeling, the low permeable layer is difficult to be effectively used, and a large amount of residual oil is difficult to be extracted. Flooding and gas channeling caused by reservoir heterogeneity have become key to limiting further enhanced recovery from such reservoirs.
Previously, researchers mostly simulate heterogeneous oil reservoirs by establishing large-scale two-dimensional and three-dimensional physical models, the experimental workload is large, the period is long, the cost is high, the success rate is low, and multiphase fluid distribution inside the models in the experimental process cannot be obtained. Therefore, it is necessary to improve the experimental method, complete the work which can be completed only by partial large model experiments in a simple and rapid way, realize the simulation of the water injection or gas injection development and adjustment of the heterogeneous reservoir, and provide reliable basis for the development scheme and the prediction development effect of the actual reservoir.
In application number: 201611141594.3 in the chinese patent application, relates to a physical simulation experiment apparatus for developing a horizontal well of a complex fractured reservoir, which includes a simulated wellbore, a simulated reservoir i, a simulated reservoir ii, an injection system i and an injection system ii; the simulated oil reservoir I and the simulated oil reservoir II are symmetrically arranged on two sides of the simulated wellbore and all comprise five fractured cores with different fracture parameters. The invention also relates to an experimental method, which comprises the following steps: placing fractured cores in each core holder of the two simulated reservoirs respectively; and (3) carrying out a water flooding process on the fractured core, respectively monitoring the diversion capacity, the oil saturation and the pressure of the outlet end of the fractured core in real time through corresponding flow meters, saturation probes and pressure sensors, and monitoring and simulating the oil and water production condition of the outlet end of the shaft in real time through an oil and water metering device. The patent can only simulate the horizontal well plane one-dimensional flow process of partial plane and interbed non-homogeneous (non-homogeneous parallel relation) reservoirs, and can not simulate the radial non-homogeneous (non-homogeneous serial relation) of reservoirs, and can not simulate the near well radial flow process of a vertical well. Meanwhile, the experimental method can only simulate the original oil distribution before reservoir development, can not simulate the residual oil distribution of a certain development stage of an oil reservoir, and can not simulate the plugging profile control of a certain specific area in the development process.
In application number: 201410642984 relates to a heavy oil thermal recovery microscopic displacement experiment system, which comprises an injection system, a model system, an output system and an image acquisition and analysis system, wherein the injection system is provided with a power source for providing displacement thermal fluid, the model system receives the precursor thermal fluid provided by the injection system and adopts inert gas to apply and control annular pressure around a microscopic model so as to perform a thermal fluid displacement experiment on heavy oil, the output system receives the output liquid after the displacement experiment and maintains certain back pressure, and the image acquisition and analysis system dynamically observes and photographs the microscopic displacement process and researches microscopic seepage characteristics and displacement mechanisms. The microscopic displacement experiment research described in the patent aims at a specific point in an oil reservoir, cannot simulate the macroscopic heterogeneity of the oil reservoir, cannot be used for researching the macroscopic sweep law of fluid, and cannot simulate the plugging profile control measures in development. Image analysis can only conduct qualitative mechanism research, and a reliable quantitative metering means is lacked.
Therefore, the invention discloses a novel device and a method for developing and adjusting a simulation experiment of a heterogeneous oil reservoir, and solves the technical problems.
Disclosure of Invention
The invention aims to provide a simulation device and a simulation method for developing and adjusting heterogeneous reservoirs, which can realize the simulation of water injection or gas injection development and adjustment of various heterogeneous reservoirs, analyze the distribution of residual oil before and after the simulation development, and provide reliable basis for developing development schemes and predicting development effects of actual reservoirs.
The aim of the invention can be achieved by the following technical measures: the heterogeneous oil reservoir development and adjustment simulation experiment device comprises an injection system, a discrete model system, a production metering system and a data acquisition and test system, wherein the injection system provides displacement fluid; the discrete model system comprises an inlet connected with the injection system, an outlet connected with the production metering system, and a plurality of core holders, wherein cores or sand filling models with different physical properties are filled in the core holders of a specific type so as to perform displacement simulation experiments; the extraction metering system performs gas-liquid separation and yield metering of the extracted fluid; the data acquisition and test system is connected to each connection point of the discrete model system, records the pressure, saturation and temperature data of each point of the model in the experimental process, and analyzes the data in real time through a computer.
The aim of the invention can be achieved by the following technical measures:
The injection system comprises a high-pressure displacement pump and a high-pressure intermediate container, wherein the high-pressure displacement pump provides displacement power for a displacement simulation experiment and is connected with the high-pressure intermediate container; the high-pressure intermediate container is filled with displacement fluid to simulate formation water and CO 2, and is connected with an inlet of the discrete model system.
The discrete model system comprises an injection well model, a production well model and a plurality of discrete inter-well models, wherein the injection well model is filled by a radial flow clamp holder, a radial heterogeneous model which simulates the physical properties of a near well area of an oil reservoir injection well is filled in the radial flow clamp holder, and an outlet of the injection well model is connected with the plurality of discrete inter-well models; the plurality of discrete inter-well models are filled by a tubular core holder, the physical properties of the core or sand-filled model filled in the tubular core holder refer to the physical properties of a heterogeneous reservoir between injection and production wells in a research area, each discrete inter-well model represents a part of the research area, and the integral outlet of the plurality of discrete inter-well models is connected with the production well model; the production well model is filled by a radial flow clamp holder, a radial inhomogeneous model simulating physical properties of a near well area of the oil reservoir production well is filled in the clamp holder, and an outlet of the production well model is connected with the production metering system.
The multiple discrete inter-well models connected by the injection and production ends form a series connection, an inlet of the series connection section is connected with one production end of the injection well model, an outlet of the series connection section is connected with one injection end of the production well model, the series connection section forms a branch of the heterogeneous model, physical property differences of different discrete inter-well models on the same branch simulate intra-layer heterogeneity of a reservoir, different branches connected with different outlets of the injection well model and the production well model are in parallel connection, and physical property differences of the different branches simulate inter-layer heterogeneity of the reservoir.
The back pressure control valve is connected with an outlet of the production well model to control the bottom hole pressure of the production well, the back pressure control valve is connected with the gas-liquid separator and the gas-liquid metering device in sequence, the gas-liquid separator carries out gas-liquid separation on produced fluid, and the gas-liquid metering device meters the produced gas quantity and the liquid quantity.
The data acquisition and test system records the pressure, saturation and temperature data of each point of the model in the displacement simulation process, transmits the data to a computer for real-time analysis, and can perform CT and nuclear magnetic resonance scanning on each model in the discrete model system after the displacement simulation is finished to analyze the distribution of residual oil.
The data acquisition and test system consists of a pressure sensor, a resistivity sensor, a temperature sensor, a CT scanner, a nuclear magnetic resonance tester and the computer, wherein the pressure sensor, the resistivity sensor and the temperature sensor are connected to each connecting point of the discrete model system and are used for recording pressure, saturation and temperature data of each point of the discrete model system in the experimental process and transmitting the data to the computer for real-time analysis, the CT scanner and the nuclear magnetic resonance tester are independent components, and residual oil analysis is carried out on a single model in the discrete model system after displacement simulation.
The object of the invention can also be achieved by the following technical measures: the heterogeneous oil reservoir development and adjustment simulation experiment method adopts a heterogeneous oil reservoir development and adjustment simulation experiment device and comprises the following steps: step 1, adopting a discrete model system to simulate a heterogeneous oil reservoir; step 2, reservoir fluid simulation is carried out according to the simulated real reservoir conditions; step3, development and adjustment simulation are carried out; and 4, performing fluid saturation distribution test.
The object of the invention can also be achieved by the following technical measures:
the step 1 comprises the following steps:
sa1: simplifying physical property distribution of an actual heterogeneous oil reservoir to be used as physical property distribution of an experimental model; wherein the injection and production inter-well region is discretized into a plurality of units, namely discrete inter-well models, the physical properties of each discrete inter-well model being replaced by the average physical properties of the units of the region simulated by the discrete inter-well model;
Sa2: and filling each core or sand filling model into a corresponding core holder.
The step 2 comprises the following steps:
Sb1: calculating initial oil saturation distribution of an experimental model according to simulated real reservoir conditions, wherein the real reservoir conditions refer to fluid distribution of a real reservoir, and are original oil distribution before reservoir development or residual oil distribution in a certain development stage;
sb2: disconnecting the injection well model, the production well model and the discrete inter-well models, connecting the injection ends of the models with injection equipment, and connecting the production ends with a gas-liquid flow meter;
sb3: preparing stratum crude oil or simulated oil or oil-water mixture with different proportions according to the calculated initial oil saturation distribution of the experimental model; slowly injecting corresponding compound solution into each model respectively, and at least saturating more than 5PV to achieve full saturation;
sb4: and after saturation, connecting the models again according to a preset sequence.
The step 3 comprises the following steps:
sc1: after the discrete model systems are connected in a certain sequence, connecting an inlet of the discrete model system with an injection system, wherein the injection fluid is gas or liquid; the outlet is connected with the gas-liquid flow meter, and a back pressure control system can be connected in front of the gas-liquid flow meter according to the requirement to realize the control of the outlet pressure;
Sc2: opening an injection system, carrying out a displacement experiment, and recording oil gas water extraction amount and pressure, resistivity and temperature change of each node in the experimental process;
sc3: when the high-permeability branch flows, a switch connected with the injection well model and the high-permeability branch is closed, so that the simulation of plugging of the high-permeability strip of the simulated oil reservoir is realized, and the oil gas water extraction amount and the pressure change of each node in the experimental process are continuously recorded;
sc4: the water content reaches 98%, the injection system is closed, and the displacement experiment is terminated.
Step 4 comprises:
Sd1: disconnecting the connection between the models;
sd2: according to the type of fluid used in the displacement experiment, resistivity test, acoustic wave test, CT scanning or nuclear magnetic resonance scanning are respectively carried out on each model so as to determine the distribution of the residual oil, and if the fluid does not contain gas phase, acoustic wave test is not needed;
Sd3: and processing the data and the image obtained by scanning the single model by a computer, and merging according to the positions of the data and the image to obtain the distribution of the residual oil after the whole discrete model system is displaced.
The heterogeneous oil reservoir development and adjustment simulation experiment method further comprises the steps of after the step 4, respectively injecting petroleum ether into each model for cleaning, taking out the petroleum ether from the corresponding core holder, and reusing the petroleum ether in the next experiment.
The invention relates to a device and a method for developing and adjusting a simulation experiment of a heterogeneous oil reservoir, in particular to research on seepage and development processes of the heterogeneous oil reservoir in the field of oil and gas field development; and is also suitable for other research fields related to multiphase seepage phenomenon in porous media.
The experimental device consists of an injection system, a discrete model system, a production metering system and a data acquisition and test system; wherein the injection system consists of a high pressure displacement pump, an intermediate reservoir, etc. for providing a displacement fluid; the discrete model system comprises an inlet connected with an injection system, an outlet connected with a production metering system, and a system for measuring the production of the rock core, wherein the discrete model system comprises an injection well model, a production well model and a plurality of discrete inter-well models, cores or sand-filled models with different physical properties are filled by a core holder of a specific type, and are connected in a certain sequence, and the connection sequence relation depends on the mutual position relation among all small layers; the produced liquid metering system is connected with an outlet of the discrete model system and consists of a back pressure control valve, a gas-liquid separator and a gas-liquid metering device, and is used for gas-liquid separation and yield metering of produced liquid; the discrete model system is connected with the injection system and the production metering system to form a complete displacement system; the data acquisition and test system is connected with each node of the displacement system and consists of a pressure sensor, a temperature sensor, a resistivity sensor, a computer and the like, and can also comprise CT scanning and nuclear magnetic resonance imaging equipment for measuring pressure, temperature and saturation distribution changes in the experimental process in real time. Simulation of heterogeneous reservoirs is achieved by a discrete model system. Disconnecting the models before fluid saturation, and respectively saturating the corresponding compound stratum oil or simulated oil or oil-water mixture of the models, and connecting the models according to a preset sequence after the saturation; in the displacement experiment, the individual injection and plugging profile control simulation of different small layers can be realized by adjusting the switches connected by different models; and after the displacement simulation experiment is finished, disconnecting the connection of different models, respectively performing fluid saturation test on each model, and obtaining the model residual oil distribution after the displacement is finished.
The invention can complete the simulation experiment of the development and adjustment of the heterogeneous oil reservoir, realizes the simulation of the water injection or gas injection development and adjustment process of the heterogeneous oil reservoir, can analyze the residual oil distribution before and after the simulation development, and provides reliable basis for the development scheme and the forecast development effect of the actual oil reservoir.
Drawings
FIG. 1 is a block diagram of one embodiment of a heterogeneous reservoir development and conditioning simulation experiment device of the present invention;
FIG. 2 is a block diagram of a radial heterogeneous injection well model of an embodiment of a heterogeneous reservoir development and conditioning simulation experiment device of the present invention;
FIG. 3 is a block diagram of a radial heterogeneous production well model of an embodiment of a heterogeneous reservoir development and conditioning simulation experiment device of the present invention;
FIG. 4 is a flow chart of an embodiment of a method for developing and adjusting simulation experiments for heterogeneous reservoirs according to the present invention.
Detailed Description
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
As shown in fig. 1, fig. 1 is a block diagram of an apparatus for developing and adjusting a simulation experiment of a heterogeneous oil reservoir according to the present invention.
In fig. 1, 1 is a high-pressure displacement pump, 2 is a high-pressure intermediate container, 3 is an injection well model, 4 is a discrete inter-well model, 5 is a branch of a discrete model system, 6 is a production well model, 7 is a switch and various sensors, 8 is a gas-liquid separator, 9 is a gas flowmeter, and 10 is a liquid flowmeter. 3-7 to form a discrete model system, and placing the model system in a constant temperature environment. The injection well model and the production well model in the schematic diagram have four production ends, the discrete model system has four branches, and each branch has four discrete inter-well models.
Fig. 2 is a block diagram of an injection well model of the present invention. The holder for the injection well model is of a circular plate-like structure, comprising an injection end, a number of production ends, in this embodiment four production ends. The clamp is internally filled with a radial heterogeneous model, and the physical properties of the model are referred to the physical properties of the reservoir of the near-well region of the target reservoir injection well. In this embodiment, the model includes three regions with different physical properties, which are respectively hypertonic regions, and the permeability is K 1; the medium permeation area has a permeability of K 2; and the permeability of the hypotonic region is K 3.
Fig. 3 is a block diagram of a production well model of the present invention. The holder for the production well model is of a circular plate-like structure comprising a number of injection ends, in this embodiment four injection ends and one production end. The clamp is internally filled with a radial heterogeneous model, and physical properties of the model are referred to physical properties of a near well region reservoir of a target oil reservoir extraction well. In this embodiment, the model includes three regions with different physical properties, which are respectively hypertonic regions, and the permeability is K 1; the medium permeation area has a permeability of K 2; and the permeability of the hypotonic region is K 3.
As shown in fig. 1, a high-pressure displacement pump 1 provides displacement power for experiments and is connected with a high-pressure intermediate container 2; the high-pressure intermediate container is filled with displacement fluid to simulate formation water and CO 2, and is connected with an inlet of an injection well model; the injection well model is filled by a radial flow holder, a radial heterogeneous model simulating physical properties of a near well area of the oil reservoir injection well is filled in the holder, and an outlet is connected with a plurality of discrete well models; a plurality of discrete inter-well models are packed using a tubular core holder, the properties of the core or sand pack packed inside the tubular core holder referencing the properties of the heterogeneous reservoir between the injection and production wells of the investigation region, each discrete inter-well model representing a portion of the investigation region. The different discrete interwell models connected by the injection and production ends form a series connection, the inlet of the series connection section is connected with one production end of the injection well model, the outlet of the series connection section is connected with one injection end of the production well, the series connection section forms a branch of the heterogeneous model, and the physical property differences of the different discrete interwell models on the same branch simulate the in-situ heterogeneity of the reservoir. Different branches connected with different outlets of the injection well model are in parallel connection, and physical property differences of the different branches simulate the interlayer heterogeneity of the reservoir. A switch and a flowmeter are connected between different branches. The integral outlet of the discrete inter-well model is connected with the production well model; the production well model is filled by a radial flow holder, a radial heterogeneous model simulating physical properties of a near well area of the oil reservoir production well is filled in the holder, and an outlet is connected with a production metering system; the produced metering system consists of a back pressure control valve, a gas-liquid separator and a gas-liquid metering device, is used for gas-liquid separation and yield metering of produced liquid and is also the last ring of the whole displacement device; the data acquisition and test system consists of a pressure sensor, a temperature sensor, a resistivity sensor and the like, is connected with each node of the displacement device according to the requirement, and is used for recording the pressure, temperature and resistivity change of each node in the experimental process in real time and transmitting data to a computer for data analysis.
FIG. 4 is a flow chart of an embodiment of a method for developing and adjusting simulation experiments for heterogeneous reservoirs according to the present invention. The heterogeneous oil reservoir development and adjustment simulation experiment method comprises the following steps:
(one) heterogeneous reservoir simulation
The simulation of the heterogeneous oil reservoir is realized through a discrete model system, and the discrete model system is formed by connecting an injection well model, a production well model and a plurality of discrete inter-well models according to a certain sequence.
Injection well models and production well models were packed using radial flow grippers. The physical properties of the core or sand filling model filled in the radial flow holder refer to the physical properties of the near-well reservoir in the research area, and the radial heterogeneity of the near-well reservoir is simulated. The radial flow clamp holder is of a circular plate-shaped structure and is provided with an injection (extraction) end and a plurality of extraction (injection) ends, wherein the injection (extraction) end is positioned at the center of the circular structure of the radial flow clamp holder and is connected with an injection system; the extraction (injection) ends are equidistantly distributed on the circumferential surface of the circular structure of the radial flow clamp holder, are connected with other discrete well models, sensors and flow meters, are provided with switches, and can be freely selected to be opened or closed.
Several discrete inter-well models were each packed using a tubular core holder. Physical properties of a core or sand-filled model loaded inside a tubular core holder reference the physical properties of a heterogeneous reservoir between injection and production wells of a study area, each discrete inter-well model representing a portion of the study area. The tubular core holder is generally tubular in structure having an injection end and a production end. The injection end of one discrete interwell model can be connected with one extraction end of the injection well model, and can also be connected with the extraction ends of other discrete interwell models; the production end may be connected to one injection end of the production well model or to the injection end of other discrete inter-well models. The different discrete interwell models connected by the injection and production ends form a series connection, the inlet of the series connection section is connected with one production end of the injection well model, the outlet of the series connection section is connected with one injection end of the production well, the series connection section forms a branch of the heterogeneous model, and the physical property differences of the different discrete interwell models on the same branch simulate the in-situ heterogeneity of the reservoir. Different branches connected with different outlets of the injection well model are in parallel connection, and physical property differences of the different branches simulate the interlayer heterogeneity of the reservoir. A switch and a flowmeter are connected between different branches.
(II) reservoir fluid simulation
The existing conventional displacement experiment saturated fluid process often faces the problems of long saturation time, difficulty in full saturation and the like. The device and the method designed by the invention are used for experiments, so that the full saturation of the fluid in the heterogeneous physical model can be realized in a short time, and the fluid distribution of the reservoir at any moment can be simulated according to the need, including the original oil distribution of the reservoir and the residual oil distribution of a certain development stage. The specific implementation steps are as follows:
Firstly, calculating initial oil saturation distribution of an experimental model according to simulated real reservoir conditions, wherein the real reservoir conditions refer to fluid distribution of a real reservoir, namely, original oil distribution before reservoir development and residual oil distribution in a certain development stage; then disconnecting the injection well model, the extraction well model and the discrete well models, connecting the injection ends of the models with injection equipment, and connecting the extraction ends with a gas-liquid flowmeter; preparing stratum crude oil or simulated oil or oil-water mixture with different proportions according to the calculated initial oil saturation distribution of the experimental model; slowly injecting corresponding compound solution into each model respectively, and at least saturating more than 5PV to achieve full saturation; and after saturation, connecting the models again according to a preset sequence.
(III) development and adjustment simulation
After the discrete model systems are connected in a certain sequence, the inlets of the discrete model systems are connected with an injection system, which is generally a high-pressure displacement pump or a high-pressure gas cylinder, and the injection fluid can be gas or liquid. The outlet can be directly connected with the gas-liquid flow meter, and a back pressure control system can be connected in front of the gas-liquid flow meter according to the requirement to realize the control of the outlet pressure. The connection between different models is provided with a switch, various sensors and a flowmeter, wherein the sensors and the flowmeter are used for monitoring pressure, temperature, resistivity change, fluid migration direction, speed and the like in the experimental process, and the switch is used for adjusting the fluid migration direction in the experiment. In the experiment, the individual injection and plugging profile control simulation of different small layers can be realized by adjusting the switches connected by different models.
(IV) fluid saturation distribution testing
After the displacement simulation experiment is finished, the connection between the models is disconnected; respectively carrying out fluid saturation distribution test on each model, and obtaining accurate gas-liquid saturation distribution of an injection well model, a production well model and any discrete interwell model by adopting methods such as resistivity test, acoustic wave test and nuclear magnetic resonance test, wherein under the general condition, one of CT scanning and nuclear magnetic resonance scanning is selected, and if the fluid does not contain gas phase, acoustic wave test is not needed; and obtaining the fluid saturation distribution of the whole heterogeneous oil reservoir physical model according to the positions of different discrete well models, and calculating the sweep coefficient and the oil displacement efficiency of the displacement medium.
According to the method and the steps, the heterogeneous oil reservoir development and adjustment simulation experiment can be completed, the simulation of the water injection or gas injection development and adjustment process of the heterogeneous oil reservoir is realized, the residual oil distribution before and after the simulation development can be analyzed, and a reliable basis is provided for the establishment of a development scheme and the prediction of the development effect of an actual oil reservoir.
In one embodiment of the present invention, the following steps are implemented:
s1: the physical distribution of the actual heterogeneous oil reservoir is simplified and is used as the physical distribution of an experimental model. Wherein the injection and production inter-well region is discretized into a plurality of units, i.e., discrete inter-well models, the physical properties of each discrete inter-well model being replaced with the average physical properties of the region it simulates.
S2: and filling each core or sand filling model into a corresponding core holder.
S3: and calculating the oil saturation distribution of the simulated heterogeneous oil reservoir, and taking the oil saturation distribution as the initial oil saturation distribution of the experimental model.
S4: according to the initial oil saturation distribution of the experimental model calculated in the step S3, preparing simulated oil and oil-water mixtures under different water saturation; and (3) respectively and slowly injecting corresponding compound solutions into each model, wherein the compound solutions are at least saturated by more than 5PV to achieve full saturation.
S5: the injection well model, the production well model and the discrete inter-well models are connected in a predetermined sequence and connected with an injection system and a production metering system.
S6: and carrying out a displacement experiment, and recording oil gas water extraction amount and pressure and temperature changes of each node in the experimental process.
S7: when the high-permeability branch flows, the switch connected with the injection well model and the high-permeability branch is closed, so that the simulation of plugging of the high-permeability strip of the simulated oil reservoir is realized, and the oil gas water extraction amount and the pressure change of each node in the experimental process are continuously recorded.
S8: the water content reaches 98%, the displacement experiment is terminated, and the connection between the models is disconnected.
S9: and respectively carrying out fluid saturation measurement distribution test on each model, and selecting methods such as resistivity test, acoustic wave test, nuclear magnetic resonance test and the like according to the fluid type.
S10: and according to the positions of different models, obtaining the multiphase fluid saturation distribution of the whole heterogeneous experimental model, and calculating the sweep coefficient and the oil displacement efficiency of the displacement medium.
S11: and (3) injecting petroleum ether into each model for cleaning, and taking out the petroleum ether from the corresponding core holder to prepare the next experiment.
The invention relates to a novel physical simulation experiment device and a method in porous medium seepage research, in particular to research on seepage and development processes of heterogeneous oil reservoirs in the field of oil and gas field development; and is also suitable for other research fields related to multiphase seepage phenomenon in porous media.
Claims (5)
1. The heterogeneous oil reservoir development and adjustment simulation experiment device is characterized by comprising an injection system, a discrete model system, a production metering system and a data acquisition and test system, wherein the injection system provides displacement fluid; the discrete model system comprises an inlet connected with the injection system, an outlet connected with the extraction metering system, and a plurality of core holders, wherein cores or sand-filled models with different physical properties are filled in the core holders to perform displacement simulation experiments; the extraction metering system performs gas-liquid separation and yield metering of the extracted fluid; the data acquisition and test system is connected to each connection point of the discrete model system, records the pressure, saturation and temperature data of each point of the model in the experimental process, and analyzes the data in real time through a computer;
The discrete model system comprises an injection well model, a production well model and a plurality of discrete inter-well models, wherein the injection well model is filled by a radial flow clamp holder, a radial heterogeneous model which simulates the physical properties of a near well area of an oil reservoir injection well is filled in the radial flow clamp holder, and an outlet of the injection well model is connected with the plurality of discrete inter-well models; the plurality of discrete inter-well models are filled by a tubular core holder, the physical properties of the core or sand-filled model filled in the tubular core holder refer to the physical properties of a heterogeneous reservoir between injection and production wells in a research area, each discrete inter-well model represents a part of the research area, and the integral outlet of the plurality of discrete inter-well models is connected with the production well model; the production well model is filled by a radial flow holder, a radial heterogeneous model simulating physical properties of a near well area of an oil reservoir production well is filled in the radial flow holder, and an outlet of the production well model is connected with the production metering system; the discrete model system inlet is an injection well model inlet;
The data acquisition and testing system records the pressure, saturation and temperature data of each point of the model in the displacement simulation process, transmits the data to a computer for real-time analysis, and performs CT and nuclear magnetic resonance scanning on each model in the discrete model system after the displacement simulation is finished to analyze the distribution of residual oil;
The data acquisition and test system consists of a pressure sensor, a resistivity sensor, a temperature sensor, a CT scanner, a nuclear magnetic resonance tester and the computer, wherein the pressure sensor, the resistivity sensor and the temperature sensor are connected to each connecting point of the discrete model system and are used for recording pressure, saturation and temperature data of each point of the discrete model system in the experimental process and transmitting the data to the computer for real-time analysis;
The multiple discrete inter-well models connected by the injection and production ends form a series connection, an inlet of the series connection section is connected with one production end of the injection well model, an outlet of the series connection section is connected with one injection end of the production well model, the series connection section forms a branch of the heterogeneous model, physical property differences of different discrete inter-well models on the same branch simulate in-layer heterogeneity of a reservoir, different branches connected with different outlets of the injection well model and the production well model are in parallel connection, and physical property differences of the different branches simulate in-layer heterogeneity of the reservoir.
2. The heterogeneous reservoir development and conditioning simulation experiment device according to claim 1, wherein the injection system comprises a high-pressure displacement pump and a high-pressure intermediate container, the high-pressure displacement pump providing displacement power for the displacement simulation experiment and being connected with the high-pressure intermediate container; the high-pressure intermediate container is filled with displacement fluid to simulate formation water and CO 2, and is connected with an inlet of the discrete model system.
3. The device for simulating development and adjustment of heterogeneous reservoirs according to claim 1, wherein the production metering system comprises a back pressure control valve, a gas-liquid separator and a gas-liquid metering device, the back pressure control valve is connected with the outlet of the production well model to control the bottom hole pressure of the production well, the gas-liquid separator and the gas-liquid metering device are connected behind the back pressure control valve in sequence, the gas-liquid separator performs gas-liquid separation on produced fluid, and the gas-liquid metering device meters the gas amount and the liquid amount of produced fluid.
4. A method of heterogeneous reservoir development and conditioning simulation experiment using the heterogeneous reservoir development and conditioning simulation experiment apparatus as set forth in any one of claims 1 to 3, comprising:
Step 1, adopting a discrete model system to simulate a heterogeneous oil reservoir;
Step 2, reservoir fluid simulation is carried out according to the simulated real reservoir conditions;
Step 3, development and adjustment simulation are carried out;
Step 4, performing fluid saturation distribution test;
the step 1 comprises the following steps:
sa1: simplifying physical property distribution of an actual heterogeneous oil reservoir to be used as physical property distribution of an experimental model; wherein the injection and production inter-well region is discretized into a plurality of units, namely discrete inter-well models, the physical properties of each discrete inter-well model being replaced by the average physical properties of the units of the region simulated by the discrete inter-well model;
Sa2: filling each core or sand filling model into a corresponding core holder;
The step 2 comprises the following steps:
Sb1: calculating initial oil saturation distribution of an experimental model according to simulated real reservoir conditions, wherein the real reservoir conditions refer to fluid distribution of a real reservoir, and are original oil distribution before reservoir development or residual oil distribution in a certain development stage;
sb2: disconnecting the injection well model, the production well model and the discrete inter-well models, connecting the injection ends of the models with injection equipment, and connecting the production ends with a gas-liquid flow meter;
Sb3: preparing stratum crude oil or simulated oil or oil-water mixture with different proportions according to the calculated initial oil saturation distribution of the experimental model; slowly injecting corresponding compound solution into each model respectively, and at least saturating more than 5PV to achieve full saturation;
sb4: after saturation, connecting the models again according to a preset sequence;
The step 3 comprises the following steps:
Sc1: after the discrete model systems are connected in a certain sequence, connecting an inlet of the discrete model system with an injection system, wherein the injection fluid is gas or liquid; the outlet is connected with a gas-liquid flow meter, and a back pressure control valve is connected in front of the gas-liquid flow meter to realize control of outlet pressure;
sc2: opening an injection system, carrying out a displacement experiment, and recording oil gas water extraction amount and pressure, resistivity and temperature change of each node in the experimental process;
Sc3: when the high-permeability branch flows, a switch connected with the injection well model and the high-permeability branch is closed, so that the simulation of plugging of the high-permeability strip of the simulated oil reservoir is realized, and the oil gas water extraction amount and the pressure change of each node in the experimental process are continuously recorded;
sc4: the water content reaches 98%, the injection system is closed, and the displacement experiment is terminated;
Step 4 comprises:
sd1: disconnecting the connection between the models;
Sd2: according to the type of fluid used in the displacement experiment, resistivity test, acoustic wave test, CT scanning or nuclear magnetic resonance scanning are respectively carried out on each model so as to determine the distribution of the residual oil, and if the fluid does not contain gas phase, acoustic wave test is not needed;
Sd3: and processing the data and the image obtained by scanning the single model by a computer, and merging according to the positions of the data and the image to obtain the distribution of the residual oil after the whole discrete model system is displaced.
5. The method according to claim 4, further comprising, after step 4, injecting petroleum ether into each model for cleaning, and taking it out from the corresponding core holder, wherein the next experiment can be repeated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010684030.4A CN114016997B (en) | 2020-07-15 | 2020-07-15 | Heterogeneous oil reservoir development and adjustment simulation experiment device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010684030.4A CN114016997B (en) | 2020-07-15 | 2020-07-15 | Heterogeneous oil reservoir development and adjustment simulation experiment device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114016997A CN114016997A (en) | 2022-02-08 |
| CN114016997B true CN114016997B (en) | 2024-05-31 |
Family
ID=80053892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010684030.4A Active CN114016997B (en) | 2020-07-15 | 2020-07-15 | Heterogeneous oil reservoir development and adjustment simulation experiment device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114016997B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898326A (en) * | 2021-10-08 | 2022-01-07 | 北京科技大学 | Foam injection gravity override action characterization experiment device and method |
| CN114658401B (en) * | 2022-04-05 | 2024-06-14 | 西南石油大学 | Experimental device and method for simulating heterogeneous oil reservoir gas injection and improving recovery ratio |
| CN114755163B (en) * | 2022-05-05 | 2024-05-31 | 西南石油大学 | Experimental system for representing interference degree of reservoir stratum |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147749A (en) * | 2013-02-28 | 2013-06-12 | 西南石油大学 | Novel physical model experiment device for two-dimensional heterogeneous reservoir bed |
| CN103573264A (en) * | 2013-11-19 | 2014-02-12 | 中国石油大学(华东) | Heterogeneous reservoir water injection commingling interlayer disturbance simulation system and detection method |
| CN104060985A (en) * | 2014-06-16 | 2014-09-24 | 中国地质大学（北京） | Method and system for testing entering depth of stratified oil deposit profile control water plugging agent |
| CN105092446A (en) * | 2014-05-08 | 2015-11-25 | 中国海洋石油总公司 | Two-dimensional visual percolation experiment method capable of simulating in-layer heterogeneity |
| CN106522934A (en) * | 2016-12-12 | 2017-03-22 | 中国石油大学(北京) | Physical simulation experimental device and method for development of complex fractured oil reservoir horizontal well |
| CN109655373A (en) * | 2018-12-25 | 2019-04-19 | 国家地质实验测试中心 | Gas hydrates reservoir original position property parameter simulation test macro and method |
| CN109709266A (en) * | 2018-12-03 | 2019-05-03 | 中国石油集团川庆钻探工程有限公司 | A kind of straight well stratified reservoir flowing simulated experiment device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453794B (en) * | 2014-11-20 | 2017-05-17 | 中国科学院广州能源研究所 | Simulation experiment system for whole process of natural gas hydrate exploitation and simulation method |
-
2020
- 2020-07-15 CN CN202010684030.4A patent/CN114016997B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103147749A (en) * | 2013-02-28 | 2013-06-12 | 西南石油大学 | Novel physical model experiment device for two-dimensional heterogeneous reservoir bed |
| CN103573264A (en) * | 2013-11-19 | 2014-02-12 | 中国石油大学(华东) | Heterogeneous reservoir water injection commingling interlayer disturbance simulation system and detection method |
| CN105092446A (en) * | 2014-05-08 | 2015-11-25 | 中国海洋石油总公司 | Two-dimensional visual percolation experiment method capable of simulating in-layer heterogeneity |
| CN104060985A (en) * | 2014-06-16 | 2014-09-24 | 中国地质大学（北京） | Method and system for testing entering depth of stratified oil deposit profile control water plugging agent |
| CN106522934A (en) * | 2016-12-12 | 2017-03-22 | 中国石油大学(北京) | Physical simulation experimental device and method for development of complex fractured oil reservoir horizontal well |
| CN109709266A (en) * | 2018-12-03 | 2019-05-03 | 中国石油集团川庆钻探工程有限公司 | A kind of straight well stratified reservoir flowing simulated experiment device and method |
| CN109655373A (en) * | 2018-12-25 | 2019-04-19 | 国家地质实验测试中心 | Gas hydrates reservoir original position property parameter simulation test macro and method |
Non-Patent Citations (2)
| Title |
|---|
| 延长M油田非均质低渗油藏水驱开发效果实验研究;张丽娜;石油地质与工程;第32卷(第3期);第77-79页 * |
| 张丽娜.延长M油田非均质低渗油藏水驱开发效果实验研究.石油地质与工程.2018,第32卷(第3期),第77-79页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114016997A (en) | 2022-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114016997B (en) | Heterogeneous oil reservoir development and adjustment simulation experiment device and method | |
| CN103527185B (en) | Horizontal well physical simulation experiment device and its experimental technique | |
| CN102608011B (en) | Method for determining and building bound water for crack-pore (hole) type reservoir core | |
| CN104863557A (en) | Experimental device and method of super heavy oil reservoir steam-nitrogen-viscosity reducer composite steam stimulation | |
| CN107045054A (en) | Husky behavior and the experimental provision and method of the relation of porous media radial direction deformation are produced in a kind of researching natural gas hydrate recovery process | |
| CN103556994A (en) | Experimental detecting system and detecting method for distribution of remaining oil in fracture-cavity reservoir bed | |
| CN106246170B (en) | Five core translocation physical simulating devices and flow net model method | |
| CN105021506A (en) | Pore network model-based calculation method of three-phase relative permeability | |
| CN110924933A (en) | Visual experiment method for dynamically simulating shale fracturing fracture network | |
| CN109519156A (en) | A kind of side water sand rock gas reservoir water drive section model Seepage Experiment method | |
| CN109064864B (en) | Device for simulating recharging path of geothermal tail water and application method of device | |
| CN106522934A (en) | Physical simulation experimental device and method for development of complex fractured oil reservoir horizontal well | |
| CN108051643A (en) | Multipair dynamic monitoring displacement system of multi-functional long cores radial direction | |
| CN106896212A (en) | The device of monitoring deepwater drilling liquid invasion procedure hydrate reservoir physical property change | |
| CN108266166A (en) | A kind of fractured reservoir fluctuates recover the oil microcosmic jet stream anatonosis mechanism evaluation experimental device and method | |
| CN203769767U (en) | Horizontal-well physical simulation experiment device | |
| CN103983551A (en) | Two-dimensional visual seepage experiment apparatus stimulating in-layer homogeneity, and its experiment method | |
| CN109283584A (en) | Distribution type fiber-optic sonic test method and device applied to three-dimensional physical simulation | |
| CN112782209B (en) | Diagenetic simulation experiment device and method capable of researching underground in-situ conversion process | |
| CN111720101B (en) | Simulation system and simulation method for shale gas well fracturing flowback | |
| CN117266811A (en) | Organic rock in-situ conversion development simulation method | |
| CN204877410U (en) | Super viscous crude oil reservoir steam, nitrogen gas, thinner complex experimental apparatus of taking in and send out | |
| CN116856922A (en) | Experimental device and method for distribution form of dominant channels among steam flooding wells of heavy oil reservoirs | |
| CN114526040B (en) | Device and method for measuring carbon dioxide foam flooding gravity separation distance of layered heterogeneous oil reservoir | |
| CN113250659B (en) | Gas injection experiment simulation method and device for improving displacement efficiency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |