CN116052516B - Method for manufacturing artificial three-dimensional simulation physical model based on composite sand body configuration characteristics - Google Patents
Method for manufacturing artificial three-dimensional simulation physical model based on composite sand body configuration characteristics Download PDFInfo
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Abstract
The invention relates to a method for manufacturing an artificial three-dimensional simulation physical model based on composite sand body configuration characteristics, which comprises the following steps: determining the boundary range, the superposition characteristics and the permeability of the single sand body of the composite sand body; establishing a composite sand body model numerical model, and determining a well arrangement mode; the method for manufacturing the artificial three-dimensional simulation physical model comprises the following steps: preparing different single sand models according to the thickness ratio of the single sand; different single sand body models are put into a mould according to the superposition characteristics of the composite sand body, and interlayer materials are adopted to fill between the different single sand body models; burying an injection well into a corresponding position according to the well arrangement mode; and heating and curing to form the artificial three-dimensional simulation physical model with the configuration characteristics of the composite sand body. The method for manufacturing the artificial three-dimensional simulation physical model based on the composite sand body configuration characteristics can simulate water flooding and chemical displacement processes, and provides a technical means for explaining the influence mechanism of the river phase composite sand body configuration on the distribution of residual oil after water flooding and chemical flooding.
Description
Technical Field
The invention relates to a method for manufacturing an artificial three-dimensional simulation physical model based on composite sand body configuration characteristics, and belongs to the technical field of oil reservoir development.
Background
Because offshore oil field development has the characteristics of large well spacing and thin well pattern, the traditional fine reservoir research thought of land oil field 'well-seismic combination and well as a main' is not applicable. Based on the offshore oilfield development geological research method, a well-seismic combination and a marine river phase composite sand body configuration theory and characterization method taking a composite sand body as a core and a development geological research method and a technical system matched with the method and suitable for the offshore large well distance oil-gas field efficient development are developed.
However, it must also be seen that the current research work based on the composite sand body configuration and numerical simulation can only qualitatively divide the discontinuous limit level of the river-phase reservoir and determine the connectivity of the reservoir, and the knowledge about the influence mechanism of the river-phase composite sand body configuration on the distribution of residual oil can not meet the actual requirements of oil field development. Therefore, by adopting a physical simulation technology, the actual three-dimensional simulation physical model of the composite sand body configuration characteristic is established by considering the discontinuous limit seepage resistance of the reservoir, the dynamic characteristic of oil field development is closely related, the distribution rule and the enrichment characteristic of the residual oil are realized, and the method has important theory and application value for developing the residual oil mining and improving the recovery ratio of the old oil field in the offshore high water content period.
The three-dimensional sand box model is built in the literature 1, namely the construction structure of a curved flow point dam, the displacement experiment and the analysis of residual oil, and the literature 2, namely the physical simulation experiment method of residual oil distribution constrained by the configuration of a lake bottom fan, wherein the sand box model built in the literature 1 can only realize the fluid experiment of various geologic bodies at normal temperature and pressure, and the sand box model built in the literature 2 adopts NaCl solution with the concentration of 3 per mill to irrigate quartz sand, and the model only can realize the physical simulation experiment of water displacement under the conditions of high temperature and high pressure because the NaCl solution has a certain influence on chemical agents. However, after the offshore oil field is subjected to long-term water flooding development, the heterogeneity of the reservoir is aggravated, the phenomenon of injection water inrush is obvious, and chemical flooding has become a key technology for further improving the recovery ratio after the water flooding development of most of the offshore oil fields.
Therefore, based on the configuration characteristics of the offshore oilfield compound sand body, an artificial three-dimensional simulation physical model capable of simulating water flooding and chemical displacement processes is established, and a technical means is provided for explaining the influence mechanism of the river phase compound sand body configuration on the distribution of residual oil after water flooding and chemical flooding.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a method for manufacturing an artificial three-dimensional simulation physical model based on the configuration characteristics of a composite sand body, which can simulate water flooding and chemical displacement processes and provides a technical means for explaining the influence mechanism of the configuration of a river phase composite sand body on the distribution of residual oil after water flooding and chemical flooding.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
In a first aspect, the present invention provides a method for manufacturing an artificial three-dimensional simulation physical model based on configuration characteristics of a composite sand body, including the steps of:
Determining the boundary range, the superposition characteristics and the physical parameters of the single sand body, including thickness, porosity and permeability parameters;
Establishing a numerical model of the composite sand body based on the boundary range, the superposition characteristics and the thickness, the porosity and the permeability parameters of the single sand body, developing numerical simulation research under different well pattern development, and determining a well distribution mode;
The method for manufacturing the artificial three-dimensional simulation physical model comprises the following steps:
preparing different single sand models;
Different single sand body models are put into a mould according to the superposition characteristics of the composite sand body, and interlayer materials are adopted to fill between the different single sand body models;
burying an injection well into a corresponding position according to the well arrangement mode;
And heating and curing to form the artificial three-dimensional simulation physical model with the configuration characteristics of the composite sand body.
Preferably, the preparing of the different single sand models comprises the steps of:
Quartz sand with different particle diameters matched with the permeability range of a single sand body is selected, and the quartz sand and a cementing agent are stirred and sieved according to a certain proportion to be used as permeable layer materials;
and processing and customizing a plurality of single sand body moulds, respectively filling permeable layer materials with different permeability ranges into the corresponding single sand body moulds, and respectively pressurizing once to obtain a plurality of single sand body models.
Preferably, the preparation method of the interlayer material comprises the following steps:
the siltstone and the cementing agent are selected to be stirred and sieved according to a certain proportion to be used as an interlayer material.
Preferably, the heating and curing form an artificial three-dimensional simulation physical model with the configuration characteristics of the composite sand body, which specifically comprises the following steps:
And placing the die on a pressure testing machine for secondary pressurization, paving electrode materials, and casting by adopting epoxy resin after heating and curing to form the artificial three-dimensional simulation physical model with the configuration characteristics of the composite sand body.
Preferably, the primary pressurizing pressure of the single sand body model is 2 MPa-5 MPa, the pressurizing time is 5 s-60 s, the secondary pressurizing pressure is 5-10 MPa, and the pressurizing time is 5 min-6 h.
Preferably, the stacking feature comprises three sand body configurations and seven configuration patterns, wherein the three sand body configurations are respectively a stacking type, a side stacking type and an isolated type, and the seven configuration patterns comprise a close contact side stacking type, an evacuation contact side stacking type, a discrete contact side stacking type, an undercut erosion river channel isolated type, a breach fan isolated type, an isolated river channel and a stacking configuration.
Preferably, the width of the artificial three-dimensional simulation physical model is 6cm, the height is 30 cm-60 cm, the length range is 30 cm-60 cm, the porosity phi of the single sand body is 10% -30%, and the permeability Kg is 10 multiplied by 10 < -3 > mu m < 2 > -15000 multiplied by 10 < -3 > mu m < 2 >.
Preferably, the well pattern comprises a vertical well pattern, a horizontal well pattern and a vertical and horizontal combined well pattern.
In a second aspect, the invention provides a device for manufacturing an artificial three-dimensional simulation physical model based on composite sand body configuration characteristics, which comprises:
a first processing unit for determining the boundary range, the superposition characteristics and the physical parameters of the single sand body, including thickness, porosity and permeability parameters;
The second processing unit is used for establishing a numerical model of the composite sand body based on the boundary range, the superposition characteristics and the thickness, the porosity and the permeability parameters of the single sand body, developing numerical simulation research under different well patterns and determining a well distribution mode;
the third processing unit is used for manufacturing an artificial three-dimensional simulation physical model, and comprises:
a fourth processing unit for preparing different single sand models;
The fifth processing unit is used for placing different single sand body models into a mould according to the superposition characteristics of the composite sand body, and filling interlayer materials among the different single sand body models;
the sixth processing unit is used for burying the injection well into the corresponding position according to the well arrangement mode;
and the seventh processing unit is used for heating and curing to form the artificial three-dimensional simulation physical model with the configuration characteristics of the composite sand body.
In a third aspect, the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the method for making an artificial three-dimensional simulation physical model based on the configuration characteristics of the composite sand body when executing the computer program.
Due to the adoption of the technical scheme, the invention has the following advantages:
The method is closely combined with the geological features of the oil reservoir, is connected with the actual development dynamic features of the oil field, realizes the distribution rule and the enrichment feature of the residual oil, and has important theoretical and application values for developing the residual oil submergence and improving the recovery ratio of the old oil field in a high water-cut period.
The method can simulate water flooding and chemical displacement processes, and provides a technical means for explaining the influence mechanism of the river phase composite sand body configuration on the distribution of residual oil after water flooding and chemical flooding.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like parts are designated with like reference numerals throughout the drawings. In the drawings:
FIG. 1 is a process flow of making an artificial three-dimensional simulated physical model based on the configuration characteristics of a composite sand body;
FIG. 2 is a schematic diagram of a three-dimensional simulated physical model based on the configuration characteristics of a close-contact side-stacked composite sand body;
FIG. 3 is a physical model object diagram of three-dimensional simulation based on the configuration characteristics of the close contact side-stacked composite sand body;
FIG. 4 is a flow chart of a physical simulation experiment;
FIG. 5 is a graph of injection pressure versus PV number;
FIG. 6 is a graph of water cut versus PV number;
FIG. 7 is a graph of recovery versus PV number.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The embodiment of the invention provides a method for manufacturing an artificial three-dimensional simulation physical model based on composite sand body configuration characteristics, which mainly aims at the research work based on composite sand body configuration and numerical simulation in the prior art, and can only qualitatively divide discontinuous limit levels of river-phase reservoirs and determine reservoir connectivity, and the knowledge about the influence mechanism of the river-phase composite sand body configuration on the distribution of residual oil can not meet the actual requirements of oilfield development, and comprises the following steps: determining the boundary range, the superposition characteristics and the physical parameters of the single sand body, wherein the physical parameters comprise thickness, porosity and permeability parameters; establishing a numerical model of a composite sand body pattern according to the boundary range, the superposition characteristics and the thickness, the porosity and the permeability parameters of the single sand body, developing numerical simulation researches under different well patterns to form a matching template of the composite sand body configuration and the well pattern, and determining a well distribution mode; the method for manufacturing the artificial three-dimensional simulation physical model comprises the following steps: preparing different single sand models according to the thickness ratio of the single sand; different single sand body models are put into a mould according to the superposition characteristics of the composite sand body, and interlayer materials are adopted to fill between the different single sand body models; burying an injection well into a corresponding position according to the well arrangement mode; and heating and curing to form the artificial three-dimensional simulation physical model with the configuration characteristics of the composite sand body. The method provides a technical means for explaining the influence mechanism of the river phase composite sand body configuration on the distribution of the residual oil after water flooding and chemical flooding
Example 1
As shown in fig. 1 and 2, the method for manufacturing an artificial three-dimensional simulation physical model based on the configuration characteristics of a composite sand body provided by the embodiment of the invention comprises the following steps:
Step one: determining the boundary range of the composite sand body based on the plane distribution characteristics and the earthquake response characteristics of the point dam sand body, and combining the logging and earthquake response characteristics to determine that the stacking characteristics of the composite sand body are close contact side stacking, wherein the permeability of the single sand body is 100 mD-5000 mD;
step two: adopting numerical simulation software to establish a numerical model of the composite sand body pattern, developing numerical simulation researches under different well patterns, and determining that the injection well pattern is a horizontal well pattern;
Step three: manufacturing an artificial three-dimensional simulated physical model, comprising:
(1) Mixing quartz sand with different particle sizes according to a proportion, uniformly stirring, adding 8% cementing agent, stirring, and sieving to obtain permeable layer material;
Mixing siltstone according to a certain proportion, stirring uniformly, adding 17% cementing agent, stirring, sieving to obtain sandwich material, wherein the composition percentages of quartz sand and siltstone granularity are shown in the following table:
Percentage of granularity composition of quartz sand
Siltstone particle size composition percentage
(2) The artificial three-dimensional simulation physical model with the composite sand body configuration characteristics comprises a single sand body 1 and a single sand body 2, wherein the thickness of the single sand body 1 is designed to be 6cm, the height of each permeation small layer is 2cm, the thickness of the single sand body 2 is 6cm, the height of each permeation small layer is 2cm, an injection well is positioned in the middle of a high permeation layer of the single sand body 1, a production well is positioned in the middle of a low permeation layer of the single sand body 2, and a high permeation layer quartz sand mixture in the single sand body 1 and a low permeation layer quartz sand mixture in the single sand body 2 are respectively divided into 2 parts.
(3) Filling a first high-permeability layer quartz sand mixture into a single sand body 1 mould, then moving the first high-permeability layer quartz sand mixture back and forth in the horizontal direction in the mould by using a sand scraping plate, continuously adjusting the depth of the sand scraping plate until the quartz sand mixture is uniformly distributed, and then placing the quartz sand mixture into a horizontal injection well;
Respectively filling a second high-permeability layer quartz sand mixture, a middle-permeability layer quartz sand mixture and a low-permeability layer quartz sand mixture into a mold, strickling, compacting the quartz sand mixture through a pressing plate, placing the filled mold on a pressure testing machine for compression molding, adjusting the position of the mold to keep the mold on the central line of a pressure bearing plate of the pressure machine, slowly boosting the pressure to 3MPa, stabilizing the pressure for 15 seconds, and then releasing the pressure;
(4) Filling a high-permeability layer, a medium-permeability layer and a first part of low-permeability layer quartz sand mixture into a single sand body 2 die, then using a sand scraping plate to move back and forth in the horizontal direction in the die, continuously adjusting the depth of the sand scraping plate until the quartz sand mixture is uniformly distributed, then placing the quartz sand mixture into a horizontal extraction well, filling a second part of low-permeability layer quartz sand mixture into the die, strickling, compacting the quartz sand mixture through a pressing plate, placing the filled die on a pressure testing machine for compression molding, adjusting the position of the die, keeping the die on the center line of a pressure bearing plate of a press, slowly boosting the pressure to 3MPa, and releasing the pressure after stabilizing the pressure for 15 seconds;
(5) Placing the single sand body 1 model and the single sand body 2 model in a conventional cuboid mould, designing the thickness of an interlayer to be 1cm, placing the high and middle permeable layers of the single sand body 1 on the left side and the high and middle permeable layers of the single sand body 2 on the right side according to the overlapping of the high and middle permeable layers of the single sand body 1, filling gaps in the mould by using siltstone mixture, placing the filled mould on a pressure testing machine for compression molding, adjusting the position of the mould to enable the mould to be kept on the central line of a pressure bearing plate of the press, slowly boosting the pressure to 8MPa, and releasing the pressure after stabilizing the pressure for 15 min;
(6) Electrode materials with corresponding lengths are manufactured according to the positions of high, medium and permeable layers in the single sand body 1 and the single sand body 2, the electrode materials are placed into different permeable layers, the model is placed into a drying box at 70 ℃ for constant temperature for 12 hours, and finally, epoxy resin is adopted for casting, so that the artificial three-dimensional simulation physical model with the structural characteristics of the closely contacted side-stacked composite sand body is formed (see fig. 2 and 3).
Step four: water flooding and chemical flooding physical simulation experiment research of artificial three-dimensional simulation model
(1) Experimental materials
1) Chemical agent
The profile control agent is Cr 3+ polymer gel, and is formed by mixing an SD201 polymer (3000 mg/L) and an organic chromium crosslinking agent (2000 mg/L); the profile control agent is core-shell polymer microspheres (3000 mg/L) and inorganic gel, wherein the inorganic gel consists of sodium silicate solution (3000 mg/L) and calcium chloride solution (3000 mg/L); the oil displacement agent is DWS surfactant solution (3000 mg/L).
2) Experimental water
The experimental water was QHD32-6 injection water, and its ion composition analysis is shown in the following table.
Ion composition analysis
3) Experimental oil
The experimental oil is simulated oil prepared from QHD32-6 crude oil and white oil according to a certain proportion, and the viscosity is 75mPas at the experimental temperature of 65 ℃.
(2) Instrument and equipment
The equipment required by the physical simulation experiment is shown in fig. 4, and mainly comprises a advection pump, a pressure sensor, an intermediate container and the like. Except for the advection pump, other parts are placed in a constant temperature box at 65 ℃. Other related instruments and equipment mainly comprise a four-way stirrer, an HJ-6 type high-power magnetic stirrer and an ALC210.4 electronic analytical balance.
(3) Experimental procedure
1) At room temperature, vacuumizing saturated water by the three-dimensional simulation physical model, measuring pore volume, and calculating porosity;
2) At the reservoir temperature, saturating the simulated oil, and calculating the oil saturation;
3) At reservoir temperature, water drives to 80% water;
4) Injecting 0.05PV polymer gel at the reservoir temperature, continuously injecting 0.2PV core-shell microspheres after 24 hours of weather coagulation, slowly swelling for 12 hours, and then injecting 0.1PV surfactant;
5) Subsequent water was brought to 95% at reservoir temperature.
(4) Analysis of results
1) Recovery ratio
The experimental results of the influence of the oil and water increasing effects of the chemical profile control and displacement control are shown in the following table.
Recovery ratio experimental data
As can be seen from the table, the combination of profile control agent, profile control agent and oil displacement agent is adopted, the macroscopic and microscopic liquid flow steering effect is good, and the recovery ratio increase and the final recovery ratio are high.
2) Dynamic characteristics
The relation between injection pressure, water content and recovery ratio and PV number in the experimental process is shown in figures 5-7. As can be seen from fig. 5-7, the injection pressure shows a tendency of "rising and falling" as the number of injection PV increases during the water flooding phase. In the injection stage of the profile control agent, the retention of the profile control agent in a high-permeability layer is increased, the seepage resistance is increased, the injection pressure is greatly increased, the imbibition pressure difference of a middle-low-permeability layer is increased, the liquid absorption amount is increased, the swept volume is enlarged, the water content is greatly reduced, and the recovery ratio is obviously increased. In the injection stage of the profile control agent, as the profile control agent has certain retention and blocking effects, the retention amount is increased along with the increase of the injection PV number, the seepage resistance is increased, and the injection pressure is gradually increased. In the injection stage of the oil displacement agent, the oil displacement agent has poor self-retention capacity, cannot generate larger seepage resistance, and the oil washing effect reduces the saturation of the oil phase, so that the seepage resistance is reduced, and the injection pressure is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The method for manufacturing the artificial three-dimensional simulation physical model based on the configuration characteristics of the composite sand body is characterized by comprising the following steps of:
Determining the boundary range, the superposition characteristics and the physical parameters of the single sand body, including thickness, porosity and permeability parameters;
Establishing a numerical model of the composite sand body based on the boundary range, the superposition characteristics and the thickness, the porosity and the permeability parameters of the single sand body, developing numerical simulation research under different well pattern development, and determining a well distribution mode;
The method for manufacturing the artificial three-dimensional simulation physical model comprises the following steps:
preparing different single sand models;
Different single sand body models are put into a mould according to the superposition characteristics of the composite sand body, and interlayer materials are adopted to fill between the different single sand body models;
burying an injection well into a corresponding position according to the well arrangement mode;
Heating and curing to form an artificial three-dimensional simulation physical model with the structural characteristics of the composite sand body, wherein the experimental study of water flooding and chemical flooding physical simulation of the artificial three-dimensional simulation physical model uses a profile control agent, experimental water, experimental oil and instrument equipment, and the experimental study comprises the following steps:
The profile control agent is Cr 3+ polymer gel, and is formed by mixing an SD201 polymer with the concentration of 3000mg/L and an organic chromium crosslinking agent with the concentration of 2000 mg/L; the profile control agent is core-shell polymer microspheres with the concentration of 3000mg/L and inorganic gel, and the inorganic gel consists of sodium silicate solution with the concentration of 3000mg/L and calcium chloride solution with the concentration of 3000 mg/L; the oil displacement agent is DWS surfactant solution with the concentration of 3000 mg/L;
the experimental water is QHD32-6 injection water;
The experimental oil is simulated oil prepared from QHD32-6 crude oil and white oil according to a certain proportion, and the viscosity is 75 mPa.s at the experimental temperature of 65 ℃;
The instrument and equipment comprises a advection pump, a pressure sensor and an intermediate container, wherein other parts except the advection pump are arranged in a constant temperature box at 65 ℃;
The experimental steps include:
at room temperature, vacuumizing saturated water by the three-dimensional simulation physical model, measuring pore volume, and calculating porosity;
at the reservoir temperature, saturating the simulated oil, and calculating the oil saturation;
At reservoir temperature, water drives to 80% water;
Injecting 0.05PV polymer gel at the reservoir temperature, continuously injecting 0.2PV core-shell microspheres after 24 hours of weather coagulation, slowly swelling for 12 hours, and then injecting 0.1PV surfactant;
subsequent water was brought to 95% at reservoir temperature.
2. The method for manufacturing the artificial three-dimensional simulation physical model based on the configuration characteristics of the composite sand body according to claim 1, wherein the step of preparing different single sand body models comprises the following steps:
Quartz sand with different particle diameters matched with the permeability range of a single sand body is selected, and the quartz sand and a cementing agent are stirred and sieved according to a certain proportion to be used as permeable layer materials;
and processing and customizing a plurality of single sand body moulds, respectively filling permeable layer materials with different permeability ranges into the corresponding single sand body moulds, and respectively pressurizing once to obtain a plurality of single sand body models.
3. The method for manufacturing the artificial three-dimensional simulation physical model based on the configuration characteristics of the composite sand body according to claim 1, wherein the method for preparing the interlayer material comprises the following steps:
the siltstone and the cementing agent are selected to be stirred and sieved according to a certain proportion to be used as an interlayer material.
4. The method for manufacturing the artificial three-dimensional simulation physical model based on the configuration characteristics of the composite sand body according to claim 2, wherein the heating and curing form the artificial three-dimensional simulation physical model with the configuration characteristics of the composite sand body specifically comprises the following steps:
and placing the single sand body die on a pressure testing machine for secondary pressurization, paving electrode materials, heating and curing, and casting by adopting epoxy resin to form the artificial three-dimensional simulation physical model with the configuration characteristics of the composite sand body.
5. The method for manufacturing the artificial three-dimensional simulation physical model based on the configuration characteristics of the composite sand body according to claim 1, wherein the primary pressurizing pressure of the single sand body model is 2-5 MPa, the pressurizing time period is 5-60 s, the secondary pressurizing pressure is 5-10 MPa, and the pressurizing time period is 5 min-6 h.
6. The method for manufacturing the artificial three-dimensional simulation physical model based on the composite sand body configuration characteristics according to claim 1, wherein the superposition characteristics comprise three sand body configurations and seven configuration patterns, the three sand body configurations are respectively of a stacked type, a side stacked type and an isolated type, and the seven configuration patterns comprise a close contact side stacked type, an evacuation contact side stacked type, a discrete contact side stacked type, an undercut erosion river channel isolated type, a breach fan isolated type, an isolated river channel and a stacked configuration.
7. The method for manufacturing the artificial three-dimensional simulation physical model based on the configuration characteristics of the composite sand body according to claim 1, wherein the artificial three-dimensional simulation physical model has the width of 6cm, the height of 30 cm-60 cm and the length of 30 cm-60 cm, the porosity of the single sand body is 10% -30%, and the permeability Kg is 10 multiplied by 10 < -3 > mu m < 2 > to 15000 multiplied by 10 < -3 > mu m < 2 >.
8. The method for manufacturing the artificial three-dimensional simulation physical model based on the configuration characteristics of the composite sand body according to claim 1, wherein the well arrangement mode comprises a vertical well pattern, a horizontal well pattern and a vertical and horizontal combined well pattern.
9. The device for manufacturing the artificial three-dimensional simulation physical model based on the configuration characteristics of the composite sand body is characterized by comprising the following components:
a first processing unit for determining the boundary range, the superposition characteristics and the physical parameters of the single sand body, including thickness, porosity and permeability parameters;
The second processing unit is used for establishing a numerical model of the composite sand body based on the boundary range, the superposition characteristics and the thickness, the porosity and the permeability parameters of the single sand body, developing numerical simulation research under different well patterns and determining a well distribution mode;
the third processing unit is used for manufacturing an artificial three-dimensional simulation physical model, and comprises:
a fourth processing unit for preparing different single sand models;
The fifth processing unit is used for placing different single sand body models into a mould according to the superposition characteristics of the composite sand body, and filling interlayer materials among the different single sand body models;
the sixth processing unit is used for burying the injection well into the corresponding position according to the well arrangement mode;
the seventh processing unit is used for heating and solidifying to form an artificial three-dimensional simulation physical model with the configuration characteristics of the composite sand body;
the water flooding and chemical flooding physical simulation experiment of the artificial three-dimensional simulation physical model is researched by using a profile control agent, experimental water, experimental oil and instrument equipment, wherein:
The profile control agent is Cr 3+ polymer gel, and is formed by mixing an SD201 polymer with the concentration of 3000mg/L and an organic chromium crosslinking agent with the concentration of 2000 mg/L; the profile control agent is core-shell polymer microspheres with the concentration of 3000mg/L and inorganic gel, and the inorganic gel consists of sodium silicate solution with the concentration of 3000mg/L and calcium chloride solution with the concentration of 3000 mg/L; the oil displacement agent is DWS surfactant solution with the concentration of 3000 mg/L;
the experimental water is QHD32-6 injection water;
The experimental oil is simulated oil prepared from QHD32-6 crude oil and white oil according to a certain proportion, and the viscosity is 75 mPa.s at the experimental temperature of 65 ℃;
The instrument and equipment comprises a advection pump, a pressure sensor and an intermediate container, wherein other parts except the advection pump are arranged in a constant temperature box at 65 ℃;
The experimental steps include:
at room temperature, vacuumizing saturated water by the three-dimensional simulation physical model, measuring pore volume, and calculating porosity;
at the reservoir temperature, saturating the simulated oil, and calculating the oil saturation;
At reservoir temperature, water drives to 80% water;
Injecting 0.05PV polymer gel at the reservoir temperature, continuously injecting 0.2PV core-shell microspheres after 24 hours of weather coagulation, slowly swelling for 12 hours, and then injecting 0.1PV surfactant;
subsequent water was brought to 95% at reservoir temperature.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method of producing an artificial three-dimensional simulated physical model based on the composite sand body configuration features as claimed in any one of claims 1 to 8.
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| 吴湛奇，曹伟佳，闫坤，魏伟，范洪军，王夏斌. 砂体构型对"调剖+调驱+驱油"效果影响实验研究.2022,第51卷10期第2399-2402页. * |
| 范洪军，曹伟佳，王夏斌，闫坤，魏伟.非均质储层井网匹配模式 与井间剩余油分布研究.2022,第51卷10期第2348-2351页. * |
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