Rock core sample analysis equipment for petroleum and shallow gas exploration

Abstract

The invention provides core sample analysis equipment for petroleum and shallow gas exploration. The core sample analysis equipment comprises a formation pressure simulation system, a permeability detection system and a control system. The formation pressure simulation system comprises a pressure-bearing container and a pressure loading mechanism, the interior of the pressure-bearing container is used for placing a rock core sample and a formation pressure environment simulation material wrapping the rock core sample, and the pressure-bearing container is further provided with a liquid inlet. The pressure loading mechanism is used for applying pressure to the formation pressure environment simulation material in the pressure-bearing container, and the formation pressure environment simulation material transmits the pressure to the periphery of the rock core sample. And the liquid supply end of the permeability detection system is connected with the liquid inlet of the pressure-bearing container. And the controller is used for controlling the permeability detection system to test the permeability of the rock core sample in a simulated formation pressure environment. According to the rock core sample analysis equipment for petroleum and shallow gas exploration provided by the invention, the permeability of the rock core sample obtained by exploration is detected on the basis of simulating a formation pressure environment.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum exploration, and in particular to a core sample analysis device for petroleum and shallow gas exploration. Background Art

[0002] There is a genetic relationship between oil and shallow gas exploration, which can be explored through joint exploration methods. Joint exploration methods include comprehensive crude oil physical property testing, saturated hydrocarbon gas chromatography-mass spectrometry analysis, natural gas sample composition and carbon isotope analysis, etc. Through these methods, the genetic relationship between heavy oil reservoirs and shallow gas reservoirs can be clarified, and the discovered shallow gas reservoirs can be used to trace back along the heavy oil-shallow gas transmission system to achieve accurate exploration of heavy oil reservoirs.

[0003] In the field of oil exploration, a very important technical means is core analysis, which can determine the nature and characteristics of underground mineral deposits by analyzing the core samples taken during the drilling process, helping oil explorers to conduct more accurate exploration work. In order to better analyze the characteristics and properties of the core, oil explorers need to grind the sampled core samples into samples of fixed size. Core testing can be divided into two categories: physical testing and chemical testing. Physical testing is a test of the physical properties of core samples. The physical properties of core samples mainly include porosity, permeability, compressive strength, plasticity, etc. These physical properties can directly reflect the physical characteristics of underground mineral deposits, which is very helpful for determining the type of mineral deposits and evaluating the reserves of the reservoir.

[0004] There are tests related to core permeability in existing patent documents, such as the geothermal exploration sampling core mechanical property testing device and test method document disclosed in patent application number 2024104174792. The test device includes a test box, a test component arranged in the test box for testing the mechanical properties of the sampled core permeability, and a cleaning component arranged on the test box for surface cleaning of the sampled core during the test. The test device can complete the mechanical property test of the core through the mutual cooperation of the test component, the lifting component and the guide component. However, the test device does not simulate the original formation pressure of the sampled core, so that the core characteristic data obtained by the test is more realistic than the formation data, which ultimately affects the accuracy of the later exploration work. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a core sample analysis device for oil and shallow gas exploration, which aims to solve the problem that the existing testing device is not configured to simulate the original rock formation pressure environment of the sampled core, thereby making the core characteristic data obtained by the test more realistic rock formation data have deviations.

[0006] The present invention provides a core sample analysis device for oil and shallow gas exploration, comprising: A formation pressure simulation system, comprising a pressure container and a pressure loading mechanism, wherein the top of the pressure container is open, the telescopic part of the pressure loading mechanism is used to enter and exit the pressure container through the top of the pressure container, the outer peripheral surface of the telescopic part of the pressure loading mechanism is in sliding and sealing contact with the inner side surface of the pressure container, the pressure container is used to place a core sample and a formation pressure environment simulation material wrapped around the core sample, and the pressure container is also provided with a liquid inlet, which connects the inner and outer sides of the pressure container; A permeability detection system, comprising a test liquid supply assembly and a flow detection device, wherein the liquid outlet of the test liquid supply assembly is connected to the liquid inlet, and the flow detection device is arranged on the test liquid supply assembly; A control system includes an exhaust valve, a humidity detection device, a first pressure detection device, a second pressure detection device and a controller, wherein the exhaust valve, the humidity detection device, the first pressure detection device, the second pressure detection device, the test liquid supply assembly and the pressure loading mechanism are all electrically connected to the controller by signals, the exhaust valve is arranged on the telescopic part of the pressure loading mechanism, and when the exhaust valve is opened, the exhaust valve conducts between the inner and outer sides of the pressure container, the detection end of the humidity detection device is located on the side of the telescopic part of the pressure loading mechanism close to the inner side of the pressure container, the first pressure detection device is arranged in the pressure container, and the second pressure detection device is arranged at a position close to the liquid outlet end of the test liquid supply assembly, the controller is used to control the opening and closing of the exhaust valve according to the signal of the humidity detection device, the controller is used to control the start and stop of the pressure loading mechanism according to the signal of the first pressure detection device, and the controller is used to control the start and stop of the test liquid supply assembly according to the signal of the second pressure detection device.

[0007] According to the core sample analysis equipment for oil and shallow gas exploration provided by the present invention, the test liquid supply assembly comprises: liquid storage container; A liquid supply pipeline, one end of which is connected to the liquid storage container, and the other end of which is connected to the liquid inlet of the pressure container. A booster pump and a one-way valve are sequentially arranged on the liquid supply pipeline from the liquid storage container to the pressure container, and the conduction direction of the one-way valve is from the booster pump to the pressure container. The second pressure detection device and the flow detection device are both arranged on the pipeline between the one-way valve and the pressure container.

[0008] The core sample analysis equipment for oil and shallow gas exploration provided by the present invention further comprises a formation pressure environment simulation material supply assembly, and the discharge end of the formation pressure environment simulation material supply assembly is located above the pressure container.

[0009] According to the core sample analysis equipment for oil and shallow gas exploration provided by the present invention, the formation pressure environment simulation material supply assembly comprises: A material storage container, wherein a material outlet is provided at the bottom of the material storage container; A first feeding mechanism, wherein a feeding end of the first feeding mechanism is detachably connected to the material outlet or is located below the material outlet, and a discharging end of the first feeding mechanism is located above the pressure container.

[0010] The core sample analysis device for oil and shallow gas exploration provided by the present invention further includes a material discharge assembly, a discharge port is provided at the bottom of the pressure container, and a first control valve is provided at the discharge port, and the material discharge assembly includes: A solid-liquid separation pipeline, wherein the top of the solid-liquid separation pipeline is connected to the discharge port, the solid-liquid separation pipeline comprises a horizontal section, the horizontal section of the solid-liquid separation pipeline is provided with a liquid diversion port opened downward, a filtering device is provided at the liquid diversion port, and one end of the horizontal section of the solid-liquid separation pipeline away from the discharge port is a solid diversion port; A liquid discharge pipeline, one end of which is connected to the liquid diversion port, and the other end of which is connected to the liquid storage container; A second material conveying mechanism, wherein a feed end of the second material conveying mechanism is connected to the solid diversion port, or is located below the solid diversion port, and a discharge end of the second material conveying mechanism is located above the storage container.

[0011] According to the core sample analysis equipment for oil and shallow gas exploration provided by the present invention, the formation pressure environment simulation material is an extruded sphere, and the outer side of the core sample is also covered with a pressure dispersion sleeve, and the pressure dispersion sleeve is used to convert the point contact between the extruded sphere and the core sample into surface contact between the pressure dispersion sleeve and the core sample.

[0012] According to the core sample analysis equipment for oil and shallow gas exploration provided by the present invention, a liquid inlet area is provided on the pressure container, and the liquid inlet area is provided with a plurality of liquid inlets, and a dispersed liquid supply element is provided at one end of the liquid supply pipeline connected to the pressure container, and the dispersed liquid supply element covers the liquid inlet area, and a mesh plate is provided inside the dispersed liquid supply element.

[0013] According to the core sample analysis equipment for oil and shallow gas exploration provided by the present invention, the storage containers include at least two, and the multiple storage containers are connected one-to-one to the multiple planetary gears of the planetary gear mechanism, and the discharge end of the second feeding mechanism and the feed end of the first feeding mechanism are both located on the orbital trajectory of the storage containers.

[0014] The core sample analysis equipment for oil and shallow gas exploration provided by the present invention also includes a cleaning mechanism, the cleaning liquid delivery port and the cleaning liquid return port of the cleaning mechanism are both located on the revolution trajectory of the storage container, and the cleaning liquid delivery port of the cleaning mechanism is located above the corresponding storage container, and the cleaning liquid return port of the cleaning mechanism is used to be detachably connected to the material outlet of the corresponding storage container.

[0015] According to the core sample analysis equipment for oil and shallow gas exploration provided by the present invention, the cleaning mechanism comprises: Cleaning fluid container; A cleaning liquid pumping pipeline, one end of which is connected to the cleaning liquid container, and the other end of which is provided with a spraying disc, and the spraying disc is suspended above the revolution track of the storage container; A waste liquid recovery pipeline, one end of which is used to be detachably connected to the material outlet of one of the storage containers through a solid-liquid separator, and the other end is connected to the cleaning liquid container.

[0016] The present invention adopts the above technical solution, which has the following advantages: The core sample analysis equipment for oil and shallow gas exploration provided by the present invention includes a formation pressure simulation system, a permeability detection system and a control system. The formation pressure simulation system includes a pressure container and a pressure loading mechanism, the top of the pressure container is open, the telescopic part of the pressure loading mechanism is used to enter and exit the pressure container through the top of the pressure container, and the outer peripheral surface of the telescopic part of the pressure loading mechanism is in sliding and sealing contact with the inner side of the pressure container, the pressure container is used to place the core sample and the formation pressure environment simulation material wrapped around the core sample, and the pressure container is also provided with a liquid inlet, which connects the inner and outer sides of the pressure container. The permeability detection system includes a test liquid supply assembly and a flow detection device, the liquid outlet end of the test liquid supply assembly is connected to the liquid inlet, and the flow detection device is arranged on the test liquid supply assembly. The control system includes an exhaust valve, a humidity detection device, a first pressure detection device, a second pressure detection device and a controller. The exhaust valve, humidity detection device, first pressure detection device, second pressure detection device, test liquid supply assembly and pressure loading mechanism are all connected with the controller by electrical signals. The exhaust valve is arranged on the telescopic part of the pressure loading mechanism. The detection end of the humidity detection device is located on the side of the telescopic part of the pressure loading mechanism close to the pressure container. The first pressure detection device is arranged in the pressure detection container, and the second pressure detection device is arranged at the position of the test liquid supply assembly close to the pressure container. When in use, the controller first controls the pressure loading mechanism to move the telescopic part to the outside of the pressure container, so that the top of the pressure container is open, and the core sample and the formation pressure environment simulation material are placed in the pressure container, and the formation pressure environment simulation material is wrapped around the core sample and fills the entire pressure container. Then the controller controls the telescopic part of the pressure loading mechanism to move into the pressure container, and provides downward pressure to the formation pressure environment simulation material in the pressure container. At the same time of downward pressure, the controller controls the exhaust valve to open, so that the exhaust valve conducts the inner and outer sides of the pressure container. When the controller detects that the pressure value of the first pressure detection device reaches the preset pressure, the controller controls the pressure loading mechanism to lock the telescopic part. Then the controller controls the test liquid supply assembly to input the test liquid into the pressure container. When the liquid surface of the test liquid contacts the bottom surface of the telescopic part of the pressure loading mechanism, it indicates that the pressure container is filled with the test liquid and the internal gas has been exhausted. At this time, the humidity detection device detects the humidity signal, and the controller controls the exhaust valve to close. When the pressure detected by the second pressure detection device reaches the maximum set value, the controller controls the test liquid supply assembly to stop supplying liquid. The test liquid in the pressure container will penetrate into the core sample, thereby reducing the pressure in the pressure container. When the pressure detected by the second pressure detection device reaches the minimum set value, the controller controls the test liquid supply assembly to continue supplying liquid. When the pressure detected by the second pressure detection device reaches the maximum set value, the controller controls the test liquid supply assembly to stop supplying liquid again.This process is repeated until the pressure value detected by the second pressure detection device no longer drops to the minimum set value. It is considered that the maximum permeability of the core sample has been reached at this time, and the total flow rate detected by the flow detection device at this time is the permeability of the core sample. The core sample analysis equipment for oil and shallow gas exploration provided by the present invention can detect the permeability of the core sample obtained by exploration on the basis of simulating the formation pressure environment, so that the detection data of the core sample is closer to its actual characteristics in the rock formation, so that the detection data can provide more accurate guidance for later development and exploitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of a core sample analysis device for oil and shallow gas exploration provided by an embodiment of the present invention; Figure 2 is a top view of a plurality of material storage containers connected to a planetary gear mechanism according to an embodiment of the present invention; Figure 3 It is a partial cross-sectional view of a pressure dispersion sleeve provided in one embodiment of the present invention.

[0019] Reference numerals: 110: pressure container; 121: core sample; 122: formation pressure environment simulation material; 131: cylinder; 132: valve plate; 210: liquid storage container; 221: booster pump; 222: one-way valve; 223: dispersed liquid supply element; 224: dense fiber mesh plate; 310: material storage container; 321: feed pipe; 322: feed fan; 411: solid-liquid separation pipeline; 412: filter screen; 420: liquid discharge pipeline; 421: reflux pump; 422: first filter; 431: discharge pipe; 432: discharge fan; 500: pressure dispersion bag; 510: wire mesh; 520: disordered elastic wire; 610: ring gear; 620: sun gear; 630: planetary gear; 640: drive motor; 650: drive shaft; 710: cleaning liquid container; 721: cleaning liquid delivery pipe; 722: cleaning liquid delivery pump; 723: spray plate; 731: waste liquid recovery pipe; 732: receiving plate; 733: waste liquid recovery pump; 734: second filter. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0026] The present invention provides a core sample analysis device for oil and shallow gas exploration, including a formation pressure simulation system, a permeability detection system and a control system. The formation pressure simulation system includes a pressure container and a pressure loading mechanism, wherein the pressure container is used to place the core sample and the formation pressure environment simulation material wrapped around the core sample, and the pressure container is also provided with a liquid inlet. The pressure loading mechanism is used to apply pressure to the formation pressure environment simulation material in the pressure container, and the formation pressure environment simulation material transmits the pressure to the core sample. The liquid supply end of the permeability detection system is connected to the liquid inlet of the pressure container. The controller is used to control the permeability detection system to perform permeability testing on the core sample under the simulated formation pressure environment. The core sample analysis device for oil and shallow gas exploration provided by the present invention realizes the permeability detection of the core sample obtained by the exploration on the basis of simulating the formation pressure environment, thereby making the detection data of the core sample closer to its actual characteristics in the rock formation, thereby making the detection data provide more accurate guidance for the later development and exploitation.

[0027] Combine the following Figures 1 to 3 The present invention is described as a core sample analysis device for oil and shallow gas exploration.

[0028] like Figures 1 to 3 As shown, an embodiment of the present invention provides a core sample analysis device for oil and shallow gas exploration, including a formation pressure simulation system, a permeability detection system and a control system. The formation pressure simulation system is used to provide an original formation pressure environment for the detection of the core sample 121, so that the detection data of the core sample 121 can more accurately and truly reflect the situation of the exploration rock formation. The permeability detection system is used to pressurize the formation pressure simulation system and detect the permeability of the core sample 121 therein. The control system is used to control the formation pressure simulation system and the permeability detection system to complete the experiment.

[0029] The formation pressure simulation system includes a pressure container 110 and a pressure loading mechanism.

[0030] The pressure container 110 may be a cylindrical structure with an open top, and a liquid inlet is provided on one side of the pressure container 110. The pressure container 110 is used to place the core sample 121 and the formation pressure environment simulation material 122, and the formation pressure environment simulation material 122 is used to wrap around the core sample 121 and fill the entire pressure container 110.

[0031] The pressure loading mechanism may include a cylinder 131 and a valve plate 132. The cylinder 131 is fixed to the top of the pressure container 110 through a bracket. The telescopic rod of the cylinder 131 is arranged downward, and the telescopic rod extends downward and retracts upward. The valve plate 132 is connected to the bottom of the telescopic rod, and the valve plate 132 forms the telescopic part of the pressure loading mechanism. The cylinder 131 can drive the valve plate 132 to enter and exit the pressure container 110. When the valve plate 132 enters the pressure container 110 through the top of the pressure container 110, the outer peripheral surface of the valve plate 132 is in sliding and sealing contact with the inner side surface of the pressure container 110, so that the part of the pressure container 110 located below the valve plate 132 forms a sealed space.

[0032] The permeability detection system includes a test liquid supply assembly and a flow detection device. The liquid outlet of the test liquid supply assembly is connected to the liquid inlet of the pressure container 110, and the test liquid supply assembly is used to supply the test liquid into the pressure container 110. The flow detection device is arranged at a position of the test liquid supply assembly close to the pressure container 110, and is used to detect the total flow of the test liquid supplied by the test liquid supply assembly into the pressure container 110.

[0033] The control system includes an exhaust valve, a humidity detection device, a first pressure detection device, a second pressure detection device and a controller. The exhaust valve, the humidity detection device, the first pressure detection device, the second pressure detection device, the test liquid supply assembly and the pressure loading mechanism are all connected to the controller by electrical signals. The exhaust valve is arranged on the telescopic part of the pressure loading mechanism, the detection end of the humidity detection device is located on the side of the telescopic part of the pressure loading mechanism close to the pressure container 110, the first pressure detection device is arranged in the pressure detection container, and the second pressure detection device is arranged at the position of the test liquid supply assembly close to the pressure container 110.

[0034] During operation, the controller first controls the cylinder 131 to drive the valve plate 132 to move to the top of the pressure container 110, so that the top of the pressure container 110 is opened. At this time, a certain amount of formation pressure environment simulation material 122 can be added to the pressure container 110, and then the core sample 121 can be placed in the pressure container 110, and then the formation pressure environment simulation material 122 can be added to the pressure container 110, so that the formation pressure environment simulation material 122 fills the entire pressure container 110. When placing the formation pressure environment simulation material 122 and the core sample 121, it is necessary to ensure that the formation pressure environment simulation material 122 exists around the core sample 121.

[0035] Then the controller controls the cylinder 131 to drive the valve plate 132 to move downward, so that the valve plate 132 enters the pressure container 110 through the opening at the top of the pressure container 110. At the same time, the controller controls the exhaust valve on the valve plate 132 to open. In the process of the cylinder 131 driving the valve plate 132 to move downward, the gas inside the pressure container 110 is discharged through the exhaust valve. When the controller detects that the pressure value of the first pressure detection device reaches the preset pressure, the controller controls the cylinder 131 to stop moving and locks the telescopic rod.

[0036] It should be noted that the preset pressure is the pressure value of the formation where the core sample 121 is located.

[0037] Then the controller controls the test liquid supply assembly to supply test liquid into the pressure container 110. As the test liquid level rises, the gas in the pressure container 110 continues to be discharged through the exhaust valve. When the controller detects the signal of the humidity detection device, it means that the test liquid has contacted the bottom surface of the valve plate 132, that is, the test liquid has filled the pressure container 110. At this time, the controller controls the exhaust valve on the valve plate 132 to close.

[0038] As the test liquid supply assembly continues to supply liquid, the pressure of the test liquid in the pressure container 110 continues to increase. When the controller detects that the pressure signal of the second pressure detection device reaches the maximum set value, the controller controls the test liquid supply assembly to stop supplying liquid. When there is test liquid in the pressure container 110, the test liquid will penetrate into the core sample 121. As the amount of test liquid penetration increases, the liquid pressure in the pressure container 110 decreases. When the controller detects that the pressure signal of the second pressure detection device reaches the minimum set value, the controller controls the test liquid supply assembly to continue supplying liquid until the controller detects that the pressure signal of the second pressure detection device reaches the maximum set value. The controller controls the test liquid supply assembly to stop supplying liquid. This process is repeated until the pressure signal of the second pressure detection device no longer drops to the minimum set value. At this time, it is considered that the maximum permeability of the core sample 121 has been reached, and the total flow detected by the flow detection device at this time is the permeability of the core sample 121. The core sample analysis equipment for oil and shallow gas exploration provided by the present invention can detect the permeability of the core sample 121 obtained by exploration on the basis of simulating the formation pressure environment, so that the detection data of the core sample 121 is closer to its actual characteristics in the rock formation, so that the detection data can provide more accurate guidance for later development and exploitation.

[0039] In some embodiments, the testing liquid supply assembly includes a liquid storage container 210 and a liquid supply pipeline.

[0040] One end of the liquid supply pipeline is connected to the position near the bottom of the liquid storage container 210, and the other end is connected to the liquid inlet of the pressure container 110. A booster pump 221 and a one-way valve 222 are arranged on the liquid supply pipeline. The booster pump 221 is arranged near the liquid storage container 210, and the one-way valve 222 is arranged near the pressure container 110. The conducting direction of the one-way valve 222 is toward the pressure container 110, which can prevent the test liquid in the pressure container 110 from flowing back into the liquid storage container 210.

[0041] In some embodiments, a formation pressure environment simulation material supply assembly is also included. The discharge end of the formation pressure environment simulation material supply assembly is located above the pressure container 110 and is used to supply the formation pressure environment simulation material 122 into the pressure container 110.

[0042] Specifically, the formation pressure environment simulation material supply assembly includes a material storage container 310 and a first material delivery mechanism.

[0043] The storage container 310 is used to store the formation pressure environment simulation material 122 .

[0044] The first feeding mechanism may be a chain conveyor, a screw feeder, etc. The first feeding mechanism provided in this embodiment includes a feeding pipe 321 and a feeding fan 322 .

[0045] A material outlet is provided at the bottom of the material storage container 310, and a second control valve is provided at the material outlet. One end of the feed pipe 321 is detachably connected to the material outlet of the material storage container 310, and the other end extends to the top of the pressure container 110. The feed fan 322 is provided on the outside of one end of the feed pipe 321 close to the material storage container 310, and the feed fan 322 is used to provide power for the formation pressure environment simulation material 122 in the feed pipe 321 to move toward the pressure container 110.

[0046] When the pressure container 110 needs to be filled, the controller controls the second control valve to open and simultaneously controls the feed blower 322 to start, so as to transport the formation pressure environment simulation material 122 in the storage container 310 to the pressure container 110 .

[0047] In some embodiments, a discharge port is provided at the bottom of the pressure container 110, and a first control valve is provided at the discharge port. The core sample analysis equipment for oil and shallow gas exploration also includes a material discharge component, which includes a solid-liquid separation pipeline 411, a liquid discharge pipeline 420 and a second material conveying mechanism.

[0048] The bottom of the pressure container 110 is a funnel structure, which can facilitate the falling of the formation pressure environment simulation material 122 and the test fluid.

[0049] The solid-liquid separation pipeline 411 includes a vertical section and a horizontal section. The top of the vertical section is connected to the discharge port of the pressure container 110, and the bottom of the vertical section is connected to one end of the horizontal section through an arc tube. The other end of the horizontal section is a solid diversion port. A downwardly extending concave structure is provided at the bottom of the horizontal section, and the bottom end of the concave structure is a liquid diversion port. A filtering device is provided at a position corresponding to the concave structure in the horizontal section, and the filtering device can be a filter screen 412.

[0050] One end of the liquid discharge pipeline 420 is connected to the liquid diversion port, and the other end is connected to the liquid storage container 210. A reflux pump 421 and a first filter 422 are arranged on the liquid discharge pipeline 420. The first filter 422 is arranged on the side of the reflux pump 421 close to the liquid storage container 210.

[0051] The second feeding mechanism may be a chain conveyor or a screw conveyor, etc. The second feeding mechanism provided in this embodiment includes a discharge pipe 431 and a discharge fan 432. One end of the discharge pipe 431 is connected to the solid diversion port of the solid-liquid separation pipeline 411, and the other end extends to the top of the storage container 310. The discharge fan 432 is arranged at one end of the discharge pipe 431 close to the solid diversion port, and the discharge fan 432 is used to provide power for the formation pressure environment simulation material 122 in the discharge pipe 431 to move toward the storage container 310.

[0052] After the detection is completed, the controller controls the cylinder 131 to slowly retract, thereby driving the valve plate 132 to slowly move toward the open end of the pressure container 110, thereby slowly releasing the high pressure in the pressure container 110. When the second pressure detection device detects that the pressure value is zero, the controller controls the first control valve, the exhaust valve, the discharge fan 432 and the reflux pump 421 to open at the same time. At this time, the pressure container 110 is opened. Since there is no positive or negative pressure influence, the formation pressure environment simulation material 122 and the test fluid in the pressure container 110 will not rush out quickly (reaction under positive pressure) or be affected by the outside world at the moment of opening. In the event of a sudden rapid impact of airflow (reaction to negative pressure), the formation pressure environment simulation material 122 and the test liquid in the pressure container 110 enter the solid-liquid separation pipeline 411 from the opened first control valve, and the formation pressure environment simulation material 122 is output to the storage container 310 through the discharge pipe 431 for reuse. When the test liquid flows through the filter screen 412, the test liquid passes through the mesh of the filter screen 412 and enters the liquid discharge pipeline 420, and is then separated from the formation pressure environment simulation material 122. The test liquid is sucked by the reflux pump 421 and sent to the first filter 422 for filtration, and then enters the liquid storage container 210.

[0053] In some embodiments, the formation pressure environment simulation material 122 may be an extruded sphere. The extruded sphere is a material for simulating the original formation pressure environment and is laid around the core sample 121 .

[0054] The extrusion sphere needs to meet the requirements of small ball diameter and roundness error, small roughness, good pressure resistance and corrosion resistance. The extrusion sphere is preferentially selected as the simulation material for simulating the original formation pressure environment. The spherical structure transmits force more evenly when squeezing each other. In this case, the extrusion force applied by the valve plate 132 is evenly transmitted to the surrounding of the core sample 121 through the extrusion sphere, thereby making the simulated original formation pressure environment around the core sample 121 closer to reality, thereby improving the accuracy of the detection data of the core sample 121.

[0055] Furthermore, before the core sample 121 is placed in the pressure container 110, the core sample 121 needs to be placed in the pressure dispersion sleeve 500, and then the core sample 121 wrapped with the pressure dispersion sleeve 500 is placed in the pressure container 110 for testing. The pressure dispersion sleeve 500 includes two layers of metal wire braided mesh 510, and a disordered elastic metal wire 520 is sandwiched between the two layers of metal wire braided mesh 510. The extrusion force of the extrusion sphere around the core sample 121 is first applied to the pressure dispersion sleeve 500, and then transmitted to the surface of the core sample 121 through the pressure dispersion sleeve 500. The point contact between the extrusion sphere and the core sample 121 is converted into the surface contact between the pressure dispersion sleeve 500 and the core sample 121, so that the force on the core sample 121 is closer to the actual situation of being pressed by the surrounding rock formations in the rock formation, thereby improving the accuracy of the detection data of the core sample 121. At the same time, it also prevents the core sample 121 from being ruptured due to excessive local pressure on the surface of the core sample 121 caused by point contact, thereby ensuring the test result of the permeability of the core sample 121.

[0056] The disordered elastic metal wire 520 may also be replaced by other uniformly laid elastic components, and the elastic components may be springs or other elastic bodies.

[0057] In some embodiments, a liquid inlet area is provided on the pressure container 110, a liquid inlet is provided in the liquid inlet area, and a plurality of liquid inlets are provided in the liquid inlet area. A dispersed liquid supply element 223 is provided at one end of the liquid supply pipeline connected to the pressure container 110, the dispersed liquid supply element 223 covers the liquid inlet area, and a mesh plate is provided inside the dispersed liquid supply element 223.

[0058] like Figure 1As shown, a cavity is provided inside the dispersed liquid supply element 223, and a pressed dense fiber mesh plate 224 is provided inside the cavity. The dense fiber mesh plate 224 is the mesh plate mentioned above, and the dense fiber mesh plate 224 covers the liquid inlet area of ​​the pressure container 110. The dense fiber mesh plate 224 can block the high-speed flowing test liquid pumped into the cavity of the dispersed liquid supply element 223 by the booster pump 221, thereby reducing the flow rate of the test liquid, thereby reducing the influence of the error in the permeability detection structure caused by the rapid impact of the test liquid on the periphery of the core sample 121, thereby improving the accuracy of the detection data of the core sample 121 obtained by the exploration.

[0059] In some embodiments, the storage container 310 includes at least two, and the multiple storage containers 310 are arranged one by one on the multiple planetary gears 630 of the planetary gear mechanism, and the discharge end of the second feeding mechanism and the discharge end of the first feeding mechanism are both located on the orbital trajectory of the storage container 310.

[0060] Specifically, Figure 1 to Figure 2 As shown, six material storage containers 310 may be provided, and the six material storage containers 310 are distributed along a circular trajectory.

[0061] The planetary gear mechanism includes a ring gear 610, a sun gear 620 and a planetary gear 630. The ring gear 610 is fixed to the outside of the six storage containers 310 through a frame, and the axis of the ring gear 610 is coaxial with the distribution track of the multiple storage containers 310. The sun gear 620 is rotatably arranged at the middle position of the six storage containers 310 through the frame, and the axis of the sun gear 620 is coaxial with the distribution track of the multiple storage containers 310. A planetary gear 630 is arranged on the outside of each storage container 310, and the planetary gear 630 is meshed with the ring gear 610 and the sun gear 620 for transmission. The sun gear 620 is driven by a drive motor 640 and a drive shaft 650, and the drive motor 640 and the drive shaft 650 are connected and fixed by a frame, and the drive motor 640 is connected to the controller through an electrical signal.

[0062] The lower end of the material storage container 310 is set as a funnel structure, the material outlet is set at the bottom of the funnel structure, a second control valve is set in the material outlet, and the second control valve is connected to the controller through an electrical signal. The end face of the second control valve and the end face of the material outlet are squeezed and sealed by a sealing member.

[0063] Multiple storage containers 310 can respectively contain formation pressure environment simulation materials 122 of different particle sizes and materials. By moving different material storage containers 310 to a position connected with the feed pipe 321, different formation pressure environment simulation materials 122 can be transported into the pressure container 110.

[0064] In some embodiments, the core sample analysis equipment for oil and shallow gas exploration also includes a cleaning mechanism, the cleaning liquid delivery port and the waste liquid return port of the cleaning mechanism are both located on the revolution trajectory of the storage container 310, and the cleaning liquid delivery port of the cleaning mechanism is located above the corresponding storage container 310, and the waste liquid return port of the cleaning mechanism is used to connect with the material outlet of the corresponding storage container 310.

[0065] Specifically, Figure 1 to Figure 2 As shown, the cleaning mechanism includes a cleaning liquid container 710, a cleaning liquid pumping pipeline and a waste liquid recovery pipeline.

[0066] The cleaning liquid pumping pipeline includes a cleaning liquid delivery pipe 721, a cleaning liquid delivery pump 722 and a spraying disc 723 which are sequentially connected in series on the cleaning liquid delivery pipe 721. The liquid inlet end of the cleaning liquid delivery pump 722 is connected to the cleaning liquid container 710 through the cleaning liquid delivery pipe 721, and the spraying disc 723 is connected to the end of the cleaning liquid delivery pipe 721, which is the cleaning liquid delivery port. When the storage container 310 is located at the cleaning position, the spraying disc 723 is located above the storage container 310, and the spraying direction of the spraying disc 723 is downward.

[0067] The waste liquid recovery pipeline includes a waste liquid recovery pipe 731 and a receiving pan 732, a waste liquid recovery pump 733, a solid-liquid separator and a second filter 734 which are sequentially connected in series on the waste liquid recovery pipe 731. The receiving pan 732 is fixed by a bracket, and the solid-liquid separator is arranged in the receiving pan 732. When the storage container 310 moves to the cleaning position, the receiving pan 732 is located below the storage container 310 and can be connected to the material outlet below the storage container 310. The liquid inlet end of the waste liquid recovery pump 733 is connected to the receiving pan 732 through the waste liquid recovery pipe 731, one end of the filter is connected to the liquid outlet of the waste liquid recovery pump 733 through the waste liquid recovery pipe 731, and the other end is connected to the cleaning liquid container 710 through the waste liquid recovery pipe 731.

[0068] When all the formation pressure environment simulation materials 122 in the pressure container 110 are transported to the storage container 310, the controller controls the motor 640 to rotate, and the motor 640 drives the sun gear 620 to rotate, thereby making multiple storage containers 310 revolve around the sun gear 620. When the storage container 310 containing the formation pressure environment simulation material 122 that needs to be cleaned moves to the cleaning position, the material outlet of the storage container 310 is connected to the receiving plate 732. Subsequently, the controller controls the second control valve to open, and controls the cleaning liquid delivery pump 722 to start at the same time, and then the cleaning liquid delivery pump 722 pumps the cleaning liquid in the cleaning liquid container 710 to the spray plate 723, and the cleaning liquid sprayed from the spray plate 723 flushes the formation pressure environment simulation material 122 in the storage container 310 below to remove the test liquid and other impurities on the surface of the formation pressure environment simulation material 122. This not only facilitates the next use, but also eliminates the impact of impurities on the permeability and the uniformity of the extrusion force transmission of the extrusion ball, thereby improving the detection accuracy of the permeability of the exploration core sample 121.

[0069] The waste liquid generated by cleaning the formation pressure environment simulation material 122 enters the receiving tray 732 below the storage container 310. The solid-liquid separator in the receiving tray 732 can prevent the formation pressure environment simulation material 122 above from entering the receiving tray 732, and allow the waste liquid to enter the receiving tray 732. The waste liquid entering the receiving tray 732 is pumped to the second filter 734 by the waste liquid recovery pump 733 for filtration and then flows into the cleaning liquid container 710, thereby realizing the recycling of the cleaning liquid.

[0070] like Figure 1 As shown, a waste liquid recovery pump 733 is connected in series between the receiving plate 732 and the second filter 734. The large suction force of the waste liquid recovery pump 733 accelerates the flow rate of the cleaning liquid in the upper storage container 310, thereby making the cleaning liquid have a better flushing effect on the surface of the formation pressure environment simulation material 122, and thus has a better effect on removing the test liquid and impurities on the surface of the formation pressure environment simulation material 122, thereby improving the cleaning effect of the cleaning mechanism and the detection accuracy of the permeability of the exploration core sample 121.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A core sample analysis device for oil and shallow gas exploration, characterized in that: include: A formation pressure simulation system, comprising a pressure container (110) and a pressure loading mechanism, wherein the top of the pressure container (110) is open, the telescopic portion of the pressure loading mechanism is used to enter and exit the pressure container (110) through the top of the pressure container (110), the outer peripheral surface of the telescopic portion of the pressure loading mechanism is in sliding and sealing contact with the inner side surface of the pressure container (110), the pressure container (110) is used to place a core sample (121) and a formation pressure environment simulation material (122) wrapped around the core sample (121), and the pressure container (110) is also provided with a liquid inlet, the liquid inlet communicating with the inner and outer sides of the pressure container (110); A permeability detection system, comprising a test liquid supply assembly and a flow detection device, wherein the liquid outlet of the test liquid supply assembly is connected to the liquid inlet, and the flow detection device is arranged on the test liquid supply assembly; A control system, comprising an exhaust valve, a humidity detection device, a first pressure detection device, a second pressure detection device and a controller, wherein the exhaust valve, the humidity detection device, the first pressure detection device, the second pressure detection device, the test liquid supply assembly and the pressure loading mechanism are all connected to the controller by electrical signals, the exhaust valve is arranged on the telescopic part of the pressure loading mechanism, and when the exhaust valve is opened, the exhaust valve conducts the inner and outer sides of the pressure container (110), the detection end of the humidity detection device is located on the side of the telescopic part of the pressure loading mechanism close to the inner side of the pressure container (110), the first pressure detection device is arranged in the pressure container (110), the second pressure detection device is arranged at a position close to the liquid outlet end of the test liquid supply assembly, the controller is used to control the opening and closing of the exhaust valve according to the signal of the humidity detection device, the controller is used to control the start and stop of the pressure loading mechanism according to the signal of the first pressure detection device, and the controller is used to control the start and stop of the test liquid supply assembly according to the signal of the second pressure detection device.

2. The core sample analysis equipment for oil and shallow gas exploration according to claim 1, characterized in that: The test liquid supply assembly comprises: Liquid storage container (210); A liquid supply pipeline, one end of the liquid supply pipeline is connected to the liquid storage container (210), and the other end is connected to the liquid inlet of the pressure container (110); a booster pump (221) and a one-way valve (222) are sequentially arranged on the liquid supply pipeline from the liquid storage container (210) to the pressure container (110); the conduction direction of the one-way valve (222) is from the booster pump (221) to the pressure container (110); and the second pressure detection device and the flow detection device are both arranged on the pipeline between the one-way valve (222) and the pressure container (110).

3. The core sample analysis equipment for oil and shallow gas exploration according to claim 2, characterized in that: It also comprises a formation pressure environment simulation material supply component, wherein the discharge end of the formation pressure environment simulation material supply component is located above the pressure container (110).

4. The core sample analysis equipment for oil and shallow gas exploration according to claim 3, characterized in that: The formation pressure environment simulation material supply assembly comprises: A material storage container (310), wherein a material outlet is provided at the bottom of the material storage container (310); A first material conveying mechanism, wherein a feeding end of the first material conveying mechanism is detachably connected to the material outlet or is located below the material outlet, and a discharging end of the first material conveying mechanism is located above the pressure container (110).

5. The core sample analysis equipment for oil and shallow gas exploration according to claim 4, characterized in that: It also includes a material discharge assembly, wherein a discharge port is provided at the bottom of the pressure container (110), and a first control valve is provided at the discharge port, and the material discharge assembly includes: a solid-liquid separation pipeline (411), wherein the top end of the solid-liquid separation pipeline (411) is connected to the discharge port, the solid-liquid separation pipeline (411) comprises a horizontal section, the horizontal section of the solid-liquid separation pipeline (411) is provided with a liquid diversion port opened downward, a filtering device is provided at the liquid diversion port, and an end of the horizontal section of the solid-liquid separation pipeline (411) away from the discharge port is a solid diversion port; A liquid discharge pipeline (420), one end of which is connected to the liquid diversion port, and the other end of which is connected to the liquid storage container (210); A second material conveying mechanism, wherein a feed end of the second material conveying mechanism is connected to the solid diversion port, or is located below the solid diversion port, and a discharge end of the second material conveying mechanism is located above the storage container (310).

6. The core sample analysis equipment for oil and shallow gas exploration according to claim 1, characterized in that: The formation pressure environment simulation material (122) is an extruded sphere, and the outer side of the core sample (121) is also coated with a pressure dispersion sleeve (500), and the pressure dispersion sleeve (500) is used to convert the point contact between the extruded sphere and the core sample (121) into surface contact between the pressure dispersion sleeve (500) and the core sample (121).

7. The core sample analysis equipment for oil and shallow gas exploration according to claim 2, characterized in that: The pressure container (110) is provided with a liquid inlet area, the liquid inlet area is provided with a plurality of liquid inlets, one end of the liquid supply pipeline connected to the pressure container (110) is provided with a dispersed liquid supply element (223), the dispersed liquid supply element (223) covers the liquid inlet area, and a mesh plate is provided inside the dispersed liquid supply element (223).

8. The core sample analysis equipment for oil and shallow gas exploration according to claim 5, characterized in that: The material storage containers (310) include at least two, and the plurality of material storage containers (310) are connected one-to-one to the plurality of planetary gears (630) of the planetary gear mechanism, and the discharge end of the second material feeding mechanism and the feed end of the first material feeding mechanism are both located on the orbital trajectory of the material storage containers (310).

9. The core sample analysis equipment for oil and shallow gas exploration according to claim 8, characterized in that: It also includes a cleaning mechanism, wherein the cleaning liquid delivery port and the cleaning liquid return port of the cleaning mechanism are both located on the revolution trajectory of the storage container (310), and the cleaning liquid delivery port of the cleaning mechanism is located above the corresponding storage container (310), and the cleaning liquid return port of the cleaning mechanism is used to be detachably connected to the material outlet of the corresponding storage container (310).

10. The core sample analysis equipment for oil and shallow gas exploration according to claim 9, characterized in that: The cleaning mechanism comprises: cleaning fluid container (710); a cleaning liquid pumping pipeline, one end of the cleaning liquid pumping pipeline being connected to the cleaning liquid container (710), the other end of the cleaning liquid pumping pipeline being provided with a spraying disc (723), and the spraying disc (723) being suspended above the orbital trajectory of the material storage container (310); A waste liquid recovery pipeline, one end of which is used to be detachably connected to the material outlet of one of the storage containers (310) through a solid-liquid separator, and the other end of which is connected to the cleaning liquid container (710).

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