CN111024544A - Imbibition experimental system and imbibition experimental method - Google Patents
Imbibition experimental system and imbibition experimental method Download PDFInfo
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Abstract
The embodiment of the invention provides an imbibition experiment system and an imbibition experiment method, and belongs to the technical field of oil reservoir development. The imbibition experimental system comprises: imbibition reaction unit, it includes reation kettle, and sets up weighing module in the reation kettle for continuously detect the weight of rock core at the in-process of imbibition experiment, wherein, weighing module includes mount table and weighing sensor, the mount table place in on the weighing sensor, be used for fixing the rock core, and make the rock core not with weighing sensor direct contact, wherein, the mount table includes supporting part and bearing portion, the supporting part connect in weighing sensor with between the bearing portion, bearing portion with the shape of rock core cooperatees, is used for fixing the rock core to make rock core bottom terminal surface can with liquid phase contact for the experiment. Through the technical scheme, the weight of the rock core corresponding to any time can be obtained, and experimenters can judge the completion time of the imbibition experiment.
Description
Technical Field
The invention relates to the technical field of oil reservoir development, in particular to an imbibition experimental system and an imbibition experimental method.
Background
As conventional oil field development fails, the goal of oil production is gradually focused on unconventional oil field development. The unconventional oil layer has the characteristics of low reservoir porosity, poor permeability, poor natural flow capacity of bottom fluid, large seepage resistance, low productivity, fast degression and the like, and has extremely poor production capacity and water injection capacity, so the seepage oil extraction plays an important role in oil field development. Imbibition oil recovery is a method which utilizes or limits the action of capillary force, utilizes chemical imbibition agents to change the wettability of the pore surfaces of rocks, promotes the imbibition process, reduces capillary resistance, and improves injectivity and recovery efficiency. The oil extraction technology has important significance especially for the development of ultra-low permeability and compact oil reservoirs. In the existing literature, most of research results of imbibition experiments aim at fractured reservoirs or low-permeability and ultra-low-permeability reservoirs, and a static imbibition physical simulation method is derived. Because the micro-nano pore throat of a compact reservoir usually requires higher measurement precision, and the reservoir conditions of high temperature and high pressure, the existing static imbibition experimental method and physical model are difficult to transplant into the compact reservoir. Therefore, there is a need to develop an experimental apparatus capable of performing imbibition experiments on tight reservoirs.
A plurality of scholars at home and abroad derive a static imbibition physical simulation method through researching the imbibition rule of a fractured reservoir or a low-permeability or ultra-low-permeability reservoir, and a large-scale indoor experiment usually adopts a traditional mass method and a volume method. The traditional mass method is used for weighing the mass of the core immersed in the imbibition liquid by utilizing a lever principle so as to calculate the imbibition rate. The experimental device uses a balance lever as an experimental basis, so that the error is large; more importantly, because the experimental device can not guarantee the fixity of the measuring environment, the measuring environment changes, such as the change of temperature and pressure, the volatilization of imbibition liquid and the like, so that the experimental conditions change, and the accuracy of the experiment is seriously influenced. The volume method is that the rock core is completely immersed in an imbibition bottle filled with liquid (wetting phase fluid), a thin neck part above the imbibition bottle contains scales, the wetting phase fluid inside the rock core displaces non-wetting phase fluid under the action of imbibition, oil expelled from the rock core is gathered in a scale tube above the imbibition bottle due to the difference of oil-water density, and the change of the reading of the concave liquid level in the tube before and after imbibition represents the imbibition change amount of the rock core, so that the imbibition extraction degree can be known. The biggest defect of the existing volume method experimental device is that oil drops absorbed by seepage are very easy to adhere to the core wall, so that oil-water gravity differentiation cannot be realized, and the oil drops cannot reach a metering section, so that the volume of crude oil collected by a graduated tube is inaccurate, and the calculated seepage and oil displacement efficiency has large errors, so that the application of the oil displacement efficiency is limited, and the existing volume method experimental device cannot meet the research requirements.
Disclosure of Invention
An object of the embodiments of the present invention is to provide an imbibition experimental system and an imbibition experimental method, which are used to solve one or more of the above technical problems.
In order to achieve the above object, an embodiment of the present invention provides an imbibition experimental system, including: imbibition reaction unit, imbibition reaction unit includes reation kettle, and sets up weighing module in the reation kettle for continuously detect the weight of rock core at the in-process of imbibition experiment, wherein, weighing module includes mount table and weighing sensor, the mount table place in on the weighing sensor, be used for fixing the rock core, and make rock core bottom terminal surface not with weighing sensor direct contact, wherein, the mount table includes supporting part and bearing portion, the supporting part connect in weighing sensor with between the bearing portion, bearing portion with the shape cooperation of rock core is used for fixing the rock core, and makes the rock core can with liquid phase contact for the experiment.
Optionally, the support portion includes a support rod connected to the weighing sensor, and a support plate disposed on an upper portion of the support rod, and the support portion is disposed on the support plate.
Optionally, the mounting table further includes an adjusting portion, disposed between the supporting portion and the supporting portion, for adjusting a position of the supporting portion to adapt to a length of the core.
Optionally, the adjusting portion includes a slide rail and a slider, a bearing portion is disposed on the slider, and the slider can drive the bearing portion to slide on the slide rail.
Optionally, the imbibition experimental system further includes: the pressure control device comprises a pressure adjusting module connected with the reaction kettle and a pressure detecting module arranged in the reaction kettle, and the experimental liquid is injected into the reaction kettle through the pressure adjusting module to adjust the pressure in the reaction kettle to a preset pressure; and the processing device is connected with the pressure control device and used for controlling the pressure regulating module to work according to the pressure inside the reaction kettle and the preset pressure so as to regulate the pressure inside the reaction kettle to the preset pressure.
Optionally, the imbibition experimental system further includes: the temperature control device comprises a temperature detection module and a temperature adjusting module, the temperature detection module is arranged in the reaction kettle and is used for detecting the temperature in the reaction kettle, and the temperature adjusting module is used for adjusting the temperature in the reaction kettle; and the processing device is connected with the temperature control device and used for controlling the temperature adjusting module to work according to the temperature inside the reaction kettle and the preset temperature so as to adjust the temperature inside the reaction kettle.
Optionally, the temperature adjusting module is a heating pipe, and the heating pipe is arranged inside the reaction kettle.
Optionally, the imbibition experimental system further comprises a stirrer, which is arranged inside the reaction kettle and used for enabling the experimental liquid to be in a dynamic flow state.
Optionally, the imbibition experimental system further includes a clamping device for clamping the core, and the clamping device is detachably disposed at the mounting table.
Correspondingly, the embodiment of the invention also provides a imbibition experimental method, which adopts the imbibition experimental system described in any one of the above to carry out imbibition experiments, and the imbibition experimental method comprises the following steps: placing a core of saturated oil on a weighing module in the reaction kettle, and continuously detecting the weight of the core through the weighing module; filling the reaction kettle with the experimental liquid, and maintaining the pressure inside the reaction kettle filled with the experimental liquid at a preset pressure state; and determining the volume of the oil amount permeated out through the seepage experiment according to the initial weight of the core, the weight after the seepage experiment, the density of the oil liquid and the density of the experimental liquid.
Through the technical scheme, the weight of the rock core corresponding to any time in the imbibition experiment process can be obtained, and experimenters can judge the completion time of the imbibition experiment. In addition, the structure of the installation table provided by the embodiment of the invention can detect the weight change condition of the rock core in real time under the condition that the contact area of the rock core and the experimental liquid is not influenced as much as possible.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1a is a schematic view of a mounting station provided by an embodiment of the present invention;
FIG. 1b is a schematic view of a mounting station provided by an embodiment of the present invention;
FIG. 1c is a schematic view of a mounting station provided by an embodiment of the present invention;
FIG. 2a is a schematic view of a mounting station provided by an embodiment of the present invention;
FIG. 2b is a schematic view of a mounting station provided by an embodiment of the present invention;
FIG. 2c is a schematic view of a mounting station provided by an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an imbibition test system provided by an embodiment of the invention;
fig. 4 is a flowchart of an imbibition experimental method provided by an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
The embodiment of the invention provides an imbibition experimental system which comprises an imbibition reaction device, wherein the imbibition reaction device is provided with a closed reaction kettle. The rock core saturated with oil is placed in the reaction kettle, and then the reaction kettle is filled with experimental liquid, so that the imbibition experiment can be started.
In order to continuously detect the change condition of the weight of the rock core in the process of the imbibition experiment, a weighing sensor is further arranged in the reaction kettle.
Further, in the process of carrying out imbibition, if the rock core is directly contacted with the weighing sensor, the end face at the bottom of the rock core cannot be fully contacted with the experimental liquid, so that the imbibition recovery rate is influenced, and the experimental result is unreliable. On the basis, the weighing sensor provided by the embodiment of the invention is also provided with the special installation platform, so that the core can be fixed, the end surface of the bottom of the core can not be in direct contact with the weighing sensor, and compared with the situation that the core is directly placed on the weighing sensor, the contact area between the core and the experimental liquid can be effectively increased.
Optionally, the mounting table includes a supporting portion for supporting the rest components and the core of the mounting table and a supporting portion for placing the core, and the connection sequence is as follows: weighing sensor is connected with the one end of supporting part, and the other end of supporting part then is connected with the supporting portion, and the rock core is then placed on the supporting portion. Wherein, need to make the bearing portion can cooperate with the shape of rock core, not only in order to realize the fixed of rock core, can also make rock core and liquid for experiments fully contact.
Wherein, in the case of arranging the mounting table in the reaction kettle, the number of the weighing sensors can be one or more. For example, when the number of the weighing sensors is one, the weighing sensors may receive the entire weight of the support portion, and the core, and perform operations such as detecting and recording the weight of the core according to experimental needs. Under the condition that the weighing sensors are multiple, the supporting part can be of a structure such as supporting legs, the supporting legs are respectively arranged on each weighing sensor, and the total weight of the supporting part, the supporting part and the rock core is determined by integrating the results of the weighing sensors.
Optionally, the supporting part can be one or more. For example, when the number of the support parts is plural, the long core may be placed on the plural support parts, and the plural support parts fix the core above the weighing sensor together, so as to realize the sustainable detection of the core weight.
Considering that the length of the adopted rock core is not fixed in different experiments, an adjusting part can be further arranged between the supporting part and the supporting part, and the position of the supporting part is adjusted through the adjusting part, so that the rock core absorbing experimental system can adapt to rock cores with different lengths, and the practicability of the absorbing experimental system is enhanced.
Optionally, the adjusting portion may be a structure in which a sliding block and a sliding rail are combined, the sliding rail is fixedly disposed on the supporting portion, the bearing portion is directly disposed above the sliding block, or a bearing portion is further disposed between the bearing portion and the sliding block, the bearing portion is disposed on the bearing portion, and the bearing portion is driven by the sliding block to slide on the sliding rail.
Optionally, the adjusting portion can also be a clamping component or a buckling component, so that the supporting portion can be detachably placed on the supporting portion, and the installation table can be suitable for cores with different lengths.
Fig. 1a to 1c in the drawings of the present invention show a specific structure of a mounting table, and the structure of the mounting table provided in this embodiment will be explained in detail with reference to fig. 1a to 1 c.
As shown in fig. 1a, 1b and 1c, the support rod 110 is disposed between the load cell (not shown) and the support plate 120, the slide rail 140 is disposed on the upper portion of the support plate 120, the slider 150 is disposed on the slide rail 140, and the load bearing portion 160 and the load bearing portion 170 are disposed above the slider 150.
The shape of the support portion may be any shape, but considering that the experimental core is substantially cylindrical, the support portion 170 in this embodiment is designed to be an arc shape, and the corresponding radius of the arc shape should be slightly larger than that of the core, so that the core can be sufficiently contacted with the experimental liquid while the core is.
Before the imbibition experiment is started, the positions of the two sliding blocks can be adjusted to enable the distance between the two sliding blocks to be smaller than the length of the core, and then the core is placed at the supporting part.
Optionally, the mounting table shown in this embodiment employs two sliding blocks, but the number of the sliding blocks is not limited to two, and may be one or more.
Alternatively, the structure of the support part shown in the embodiment includes the support rod 110 and the support plate 120, in the case that the load cell is plural, the number of the support rods 110 is not limited to one, and the plural support rods may be uniformly distributed under the support plate and placed on the load cell, respectively.
Optionally, the support plate may be eliminated under the condition that the structure of the slide rail is firm and reliable, i.e., the slide rail and the support rod are directly and fixedly connected.
The embodiment of the invention also provides another mounting table structure which comprises a bracket and a fixing part, wherein the bracket is connected between the weighing sensor and the fixing part, and the core is fixed through the fixing part.
The structure and the style of the bracket can be any, as long as the core and the fixing part can be stabilized on the weighing sensor, and therefore, the bracket is not required to be limited.
In order to enable the rock core to be in full contact with the experimental liquid, the fixing part can be internally provided with a mounting groove matched with the shape of the rock core, the fixing part can be of a hollow structure, the number and the shape of hollow holes forming the hollow structure can be random, and the rock core can be vertically placed in the mounting groove under the condition.
Optionally, the concrete structure of mounting groove can be upper and lower open-ended cylinder structure, and in the rock core disect insertion this cylinder structure, in order to realize the rigidity of rock core and fully contact with liquid for the experiment, can set up intercrossing's bracing piece in the bottom of this cylinder structure to fix the rock core through crosspoint and bracing piece, and still need form hollow out construction between this bracing piece and the cylinder structure, so that liquid for the experiment can get into in the cylinder structure.
The height of the cylindrical structure should be smaller than the length of the core, and the radius should be slightly larger than the radius of the core, so that specific values related to the height and the radius can be automatically set and adjusted according to the actual condition of the core.
Alternatively, fig. 2a shows a cylindrical structure with support rods and a hollow structure, wherein the upper part of the cylindrical structure 210 can be inserted into the core, and the bottom part thereof is provided with a hollow hole 230 formed by crossing the support rods 220.
In case the cylindrical structure shown in fig. 2a is used as a fixing part, fig. 2b and 2c again show a structure of a mounting table.
Fig. 2b shows a top view of the mounting table, fig. 2c shows a top view of the mounting table, and in combination with fig. 2b and fig. 2c, the outer edge of the support rod 220 at the bottom of the cylindrical structure 210 is fixed at the support ring 240, and a bracket 250 is further disposed at the bottom of the support ring 240.
In addition, fig. 2c shows a structure with four brackets 250 (only three are shown due to the angle), and in the actual use process, the four brackets can be placed on the same weighing cell, or four weighing sensors can be adopted, and the four brackets are respectively placed on the four weighing cells.
Alternatively, the support ring 240 may be eliminated, i.e. the bracket 250 is directly arranged at the bottom of the cylindrical structure 210 for fixing the cylindrical structure and the core.
Optionally, the number of the brackets is not limited to 4, and can be set according to experimental requirements.
Optionally, the imbibition experimental system provided by the embodiment of the invention may further include a holding device, which is mainly used for holding the core, and the holding device holding the core is placed on the installation table, so that the stability of the core may be further improved.
Optionally, in order to simulate the underground environment as truly as possible, the imbibition experimental system provided by the embodiment of the invention may further include a processing device and a pressure control device. Wherein, pressure control device has pressure regulation module and sets up the pressure measurement module in reation kettle inside, pressure regulation module can be through injecting into the experiment liquid in order to adjust to predetermineeing pressure with the inside pressure of reation kettle in to reation kettle, processing module then is used for controlling pressure regulation module according to the inside pressure of reation kettle and predetermineeing pressure to adjust to predetermineeing pressure with the inside pressure of reation kettle.
The pressure detection module can be a pressure gauge and other devices capable of detecting pressure, and the pressure regulation module can comprise a pressure pump and a switch valve.
Optionally, in order to further simulate the underground environment, the imbibition experimental system provided by the embodiment of the invention further includes a processing device and a temperature control device. Wherein, temperature control device includes temperature regulation module and sets up in the inside temperature detect module of reation kettle, temperature detect module is used for detecting the inside temperature of reation kettle, temperature regulation module is used for adjusting the inside temperature of reation kettle, processing apparatus then is used for according to the inside temperature of reation kettle with predetermine the temperature, the temperature in control temperature regulation module work is in order to adjust reation kettle.
Optionally, the temperature control module is a heating pipe, and the heating pipe may be arranged inside the reaction kettle. Or the temperature control module can also be an insulation box, and the whole reaction kettle is arranged in the insulation box.
Optionally, in order to further simulate an underground environment, the imbibition experiment system provided in the embodiment of the present invention further includes a stirrer, where the stirrer is disposed inside the reaction kettle, and during an imbibition experiment, the stirrer may be set to rotate at a constant speed at different speeds, so as to enable the experimental liquid in the reaction kettle to be in a continuous dynamic flow state.
The imbibition experimental system provided by the embodiment of the invention can simulate the high-temperature and high-pressure environment of the underground oil reservoir, can drive the experimental liquid to be in a dynamic flowing state, and can truly reflect the imbibition state of the oil reservoir.
Fig. 3 is a schematic structural diagram of an imbibition experimental system provided by an embodiment of the invention. The imbibition test system provided by this embodiment of the invention will now be described in detail with reference to fig. 3.
The imbibition experimental system comprises: the device comprises a computer 1, a pressure valve 21, a pressure valve 22, a pressure valve 23, a constant pressure device 4, a kettle cover 6, a kettle body 7, a temperature sensor 8, an oil-containing rock core 9, a rock core clamping device 10, a base support 11, a weighing sensor 12, a pressure sensor 13 and a stirrer 14. The kettle body 7 is made of high-temperature-resistant, high-pressure-resistant and corrosion-resistant stainless steel and has a columnar structure as a whole. The kettle cover 6 and the kettle body 7 are in threaded connection, so that good sealing performance in the reaction kettle is ensured. The upper part of the kettle body 7 is provided with a pressurizing port controlled by a pressure valve 21, and the pressurizing port can be connected with the constant pressure device 4 to pressurize the inside of the reaction kettle; the lower part of the kettle body 7 is provided with a pressure relief opening controlled by a pressure valve 23, and the pressure in the reaction kettle can be relieved through the pressure relief opening after the experiment is finished. The base support 11 is integrally made of stainless steel materials and used for placing an experimental core and fixing the position of the core. The core clamping device 10 designed on the upper portion of the base support 11 is a pair of closed clamping openings and is suitable for cores with the diameter of 25mm to 40mm, and the overall stability of the cores in the experiment process is guaranteed. 4 support frames below the base support 11 are respectively placed on 4 (only 2 are shown in the figure) weighing sensors 12, the materials of the support frames are alloy steel, the support frames can resist high temperature and high pressure and resist corrosion, the measurement precision is 0.01g, and the change of the weight of the rock core can be accurately measured in the experimental process. Constant voltage device 4 is connected with high temperature and high pressure resistant reation kettle through high pressure resistant pipeline 5, and steerable inside pressure keeps stable, improves the accuracy of experimental result. The computer 1 is connected with the constant pressure device 4, the temperature sensor 8, the weighing sensor 12 and the pressure sensor 13 through the data line 31, the data line 32 and the data line 33 respectively, can measure and collect data such as temperature, pressure, core weight and the like at any moment in the imbibition experiment process in real time, and is stored in the computer, so that the later-stage data processing is facilitated.
The imbibition experimental system also comprises an electric heating pipe (not shown in the figure) which is arranged in the reaction kettle, and fluid and devices in the kettle are heated by the electric heating pipe to form a high-temperature environment, wherein the working temperature can reach 80 ℃ at most. The temperature control system adopts PID control technology, the temperature sensor 8 adopts a high-precision double-channel platinum resistor, the temperature measurement range is 0-250 ℃, and the control precision is 0.1 ℃. The temperature heating measurement and control system in the integrated control computer can be matched to adjust the experiment temperature in the kettle body 8 at any time so as to achieve the purpose of simulating the pressure and temperature under the real oil reservoir condition. The temperature information can be displayed on a screen of a computer in real time, and the display precision is 0.1 ℃. The external materials of the reaction kettle adopt a stainless steel heat-insulating layer and a decorative layer, so that the heat loss inside the reaction kettle is reduced, and the constant temperature state is maintained.
In addition, the pressure sensor 13 disposed in the reaction kettle can continuously detect the gas pressure in the reaction kettle, and compared with the constant pressure device 4, the data detected by the pressure sensor 13 is more reliable. The pressure sensor 13 may also transmit the detected data to the integrated control computer 1 through a data line (not shown).
The computer can monitor the pressure, temperature and core weight data at any moment in the experimental process in real time, store the data and output the data in a table form.
Optionally, the core holding device 10 and the base support 11 have a certain weight, so that data can be cleared on a computer before the experimental core is placed, and accuracy of experimental data is guaranteed.
Optionally, in order to further simulate a dynamic underground environment, a stirrer 14 may be further disposed at the bottom of the reaction kettle 7, and the actual rotation speed of the stirrer 14 may be set according to the experimental requirements.
Fig. 4 is a flowchart of an imbibition experimental method provided by an embodiment of the invention. As shown in fig. 4, the imbibition test method includes: placing a core of saturated oil on a weighing module in the reaction kettle, and continuously detecting the weight of the core through the weighing module; filling the reaction kettle with the experimental liquid, and maintaining the pressure inside the reaction kettle filled with the experimental liquid at a preset pressure state; and determining the volume of the oil amount permeated out through the seepage experiment according to the initial weight of the core, the weight in the seepage experiment, the density of the oil liquid and the density of the experimental liquid.
The imbibition test method provided by the embodiment of the invention will be explained in detail by using a specific embodiment.
Specifically, when the imbibition experiment system provided by the embodiment of the invention is used for carrying out an imbibition experiment, a reaction kettle needs to be vertically placed, and an experiment core saturated crude oil: the saturated oil amount (m ═ m ″ -m') was calculated by recording the weight of the dry core before saturation, followed by vacuuming and pressurizing the saturated kerosene for one week of saturation, and then recording the wet weight of the core after saturation as m ″. And after the saturated rock core is aged for a period of time, vertically putting the rock core on the base support and fixing the rock core, so that the rock core cannot incline and rotate along with the injection of liquid in the reaction kettle. The core clamping device can be adjusted according to the size of the core so as to clamp and fix the core. After placing the rock core, install cauldron body lid and form airtight environment, open the pressure valve on cauldron lid upper portion, pump into the liquid for the experiment through constant voltage equipment in to reation kettle, rethread computer controls and reaches required experimental pressure, closes the pressure valve on the constant voltage equipment, keeps whole reation kettle internal pressure invariable, simulates the high-pressure environment under the actual oil reservoir condition. By using built-in reaction vesselThe full-automatic electric heating device heats the high-temperature and high-pressure resistant reaction kettle, controls the temperature through a computer, and maintains the constant temperature as far as possible, so that the imbibition temperature under the oil reservoir condition is simulated to carry out reliable imbibition experiments. When the preset experiment temperature and pressure are reached in the reaction kettle, recording the weight of the rock core at the moment as m0This value was used as a basis for the core weight before the imbibition test was started. M is the core in the reaction kettle under the action of buoyancy0The value must be less than its true weight. The experimental rock core of saturated oil contacts with the imbibition liquid, imbibition occurs under the action of capillary force, oil drops in the rock core are replaced by the experimental liquid to the rock core under the action of capillary force, and the oil drops float to the top of the reaction kettle under the action of gravity differentiation. Due to the difference of oil-water density, the weight of the core can be continuously increased along with the experiment, and more imbibition liquid enters the core to displace crude oil in the core. And recording the weight of the rock core in real time according to the data monitored and collected by the weighing sensor in real time. When the weight of the core no longer changed, the imbibition process was considered to be substantially complete, and the weight of the core at that time was recorded as m1Therefore, the volume of oil amount leaked out from the core in real time is calculated as follows:
wherein, VoRepresents the volume of oil permeated out, m0Denotes the weight of the core before the start of the imbibition test, m1Represents the weight, rho, of the core after completion of the imbibition experimentoRepresenting the density, ρ, of the oil saturated in the coreLiquid for treating urinary tract infectionThe density of the experimental liquid is shown.
The volume V of the saturated crude oil of the core can be calculated according to the saturated oil quantity m of the core before the experiment:
thus, the core imbibition production degree, R, can be obtained by the following formula:
according to the technical scheme provided by the embodiment of the invention, data such as experiment temperature, experiment pressure, core weight and the like can be monitored in the process of carrying out the imbibition experiment, a plurality of groups of experiment records can be obtained, and the recorded data can be subjected to statistical analysis to obtain the change curve of each parameter. In addition, the data such as the recovery ratio and the like in the imbibition process can be determined, so that the subsequent experimental result analysis is facilitated.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.
Claims (10)
1. An imbibition experimental system, comprising:
the imbibition reaction device comprises a reaction kettle and a weighing module arranged in the reaction kettle and is used for continuously detecting the weight of the rock core in the imbibition experiment process,
wherein the weighing module comprises an installation platform and a weighing sensor, the installation platform is arranged on the weighing sensor and used for fixing the rock core and preventing the rock core from directly contacting with the weighing sensor,
the mounting table comprises a supporting portion and a bearing portion, the supporting portion is connected between the weighing sensor and the bearing portion, the bearing portion is matched with the rock core in shape and used for fixing the rock core, and the end face of the bottom of the rock core can be in contact with the experimental liquid.
2. The imbibition experimental system of claim 1, wherein the supporting portion comprises a supporting rod connected with the weighing sensor, and a supporting plate disposed on an upper portion of the supporting rod, and the bearing portion is disposed on the supporting plate.
3. The imbibition experimental system of claim 1, wherein the mounting table further comprises an adjusting portion arranged between the support portion and the bearing portion and used for adjusting the position of the bearing portion to adapt to the length of the core.
4. The imbibition experimental system of claim 3, wherein the adjusting portion comprises a slide rail and a slide block, the slide block is provided with a bearing portion, and the slide block can drive the bearing portion to slide on the slide rail.
5. The imbibition experimental system of claim 1, further comprising:
the pressure control device comprises a pressure adjusting module connected with the reaction kettle and a pressure detecting module arranged in the reaction kettle, and the experimental liquid is injected into the reaction kettle through the pressure adjusting module to adjust the pressure in the reaction kettle to a preset pressure; and
and the processing device is connected with the pressure control device and used for controlling the pressure regulating module to work according to the pressure inside the reaction kettle and the preset pressure so as to regulate the pressure inside the reaction kettle to the preset pressure.
6. The imbibition experimental system of claim 1, further comprising:
the temperature control device comprises a temperature detection module and a temperature adjusting module, the temperature detection module is arranged in the reaction kettle and is used for detecting the temperature in the reaction kettle, and the temperature adjusting module is used for adjusting the temperature in the reaction kettle; and
and the processing device is connected with the temperature control device and used for controlling the temperature adjusting module to work according to the temperature inside the reaction kettle and the preset temperature so as to adjust the temperature inside the reaction kettle.
7. The imbibition experimental system of claim 6, wherein the temperature regulating module is a heating pipe, and the heating pipe is arranged inside the reaction kettle.
8. The imbibition experimental system of claim 1, further comprising an agitator disposed inside the reaction kettle for enabling the experimental liquid to be in a dynamic flow state.
9. The imbibition experimental system of claim 1, further comprising a clamping device for clamping the core, wherein the clamping device is detachably disposed at the mounting table.
10. An imbibition test method, wherein the imbibition test is performed by using the imbibition test system according to any one of claims 1 to 9, the imbibition test method comprising:
placing a core of saturated oil on a weighing module in the reaction kettle, and continuously detecting the weight of the core through the weighing module;
filling the reaction kettle with the experimental liquid, and maintaining the pressure inside the reaction kettle filled with the experimental liquid at a preset pressure state; and
and determining the volume of the oil amount permeated out through the seepage experiment according to the initial weight of the core, the weight after the seepage experiment, the density of the oil liquid and the density of the experimental liquid.
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