Low-temperature curing and packaging device and packaging method for oil-containing rock sample

Abstract

According to the low-temperature curing and packaging device and method for the oil-containing rock sample, a low-temperature environment is provided through the freezing assembly, ultraviolet rays emitted by the ultraviolet lamp are matched, and the sample is cured and packaged through the curing glue; a temperature sensor, an electromagnetic valve and a temperature regulator in the control assembly jointly regulate and control the temperature, and an optical power regulator and an irradiation duration regulator respectively regulate and control the irradiation intensity and the irradiation duration, so that proper temperature, irradiation intensity and irradiation duration are provided for low-temperature curing and packaging of the oil-containing rock sample; the problem that polymerization reaction cannot be initiated under heating or low temperature in the traditional curing process is solved, the original oil-containing occurrence state of the rock sample is kept, and the requirement for low-temperature curing packaging of the oil-containing rock sample is met.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas exploration, and in particular to a low-temperature solidification packaging device and a packaging method for oil-bearing rock samples. Background Art

[0002] Oil is buried in underground rock pores and is affected by a variety of factors, including its own fluidity, the thermodynamic environment of the rock formation, and underground pressure. In the study of rock oil content, the state of oil in the rock is a key research and evaluation indicator.

[0003] However, as a viscous fluid with complex components, oil's physicochemical parameters, such as its phase state, viscosity, and composition, make it highly sensitive to temperature and pressure. Therefore, during the drilling, extraction, sampling, transportation, and preparation and processing of oil-bearing rocks, each step can result in the loss of oil components and changes in the location of oil. To address these issues, the field of petroleum geochemistry has reached a consensus on closed coring and cryogenic storage. The method of preserving core samples by immersion in liquid nitrogen has been developed, which has initially achieved effective protection of the crude oil's distribution during sampling. However, for indoor analysis such as microscopic observation, samples still need to be removed and pre-processed. Maximizing the preservation of the distribution of oil and gas in the rock during this pre-processing process remains a challenge facing the exploration field.

[0004] Chinese patent application number CN201910958653.3 discloses a room-temperature curing solvent-free core adhesive and its preparation method. This patent utilizes a two-adhesive blending method to produce the cured adhesive: calcium carbonate, silica powder, and a coupling agent are mixed and stirred to obtain mixture A; bisphenol A epoxy resin and dioctyl phthalate are mixed and stirred to obtain mixture B. This method can also achieve rapid curing of demonstration samples at room temperature, but the adhesive's composition and preparation process are complex, utilizing multiple reactive diluents. Dissolving and diluting the epoxy resin is time-consuming, making it difficult to apply. Furthermore, the phenyl glycidyl ether in the formulation is highly toxic, a Class 2B carcinogen harmful to humans and the environment, limiting its application in actual core bonding applications.

[0005] The Chinese patent application number CN202011363687.7 discloses an artificial core solidification device and system, which provides a technical means for maintaining the core temperature. Through the low-temperature conduction device of the drill bit part, combined with the low-temperature cold flow circulation, the temperature control problem of the coring device under long-term operation is guaranteed. In this patent, the design of the cylinder body can provide a stable chamber structure for the production and molding of artificial cores; the structure of the cylinder body and the plunger rod can provide an effective and stable pressure environment, and the design of the liquid injection channel on the plunger rod can pass the corresponding medium to simulate the geological environment; the design of the heating unit can also provide a controllable temperature environment, so that the molding environment of the artificial core can be maximized, and the measurement and control of the performance of the artificial core can be effectively realized.

[0006] Chinese patent application number CN201910328754.2 discloses an in-situ sampling device and sampling method for underground oil, gas and water samples. The sampling device includes a fiberglass cylinder, an ultrasonic emulsifier and a UV light strip. During the sampling process of underground oil, gas and water samples, the UV light strip irradiates the UV optical photosensitive adhesive filled in the fiberglass cylinder, so that the UV optical photosensitive adhesive can be cured under the irradiation of the UV light strip to form an inclusion and solidify into shape.

[0007] Existing core sample curing and sampling methods are mostly limited to resin thermal curing or liquid nitrogen refrigeration storage. It should be pointed out that even ultraviolet radiation curing will generate a large amount of heat due to free radical initiation, which will change the occurrence state of light components. Therefore, during the coring and curing process, how to quickly cure core samples in a low-temperature environment is a gap in the current field. On the one hand, because polymer reactions require heat to open monomer chemical bonds for cross-linking, resin curing requires maintaining a certain amount of heat for polymerization reactions; on the other hand, the relevant equipment for resin curing is still not ideal, and low-temperature solutions cannot be integrated, making it difficult to stabilize the occurrence state of light components; in addition, field packaging of core samples is usually in areas far away from the power grid, and there are currently no related devices that can work independently without the power grid. Summary of the Invention

[0008] The present invention provides a low-temperature curing and packaging device and packaging method for oil-bearing rock samples, which can adjust the temperature and irradiation of the curing and packaging, provide suitable temperature, irradiation intensity and irradiation duration for the low-temperature curing and packaging of oil-bearing rock samples, and solve the problem of heat generation in the traditional curing process or the inability to induce polymerization reaction at low temperature.

[0009] In one aspect, the present invention provides a low-temperature solidification and packaging device for oil-bearing rock samples, comprising:

[0010] A box body, inside of which is provided a sample table for placing samples and an ultraviolet lamp for irradiating the samples;

[0011] A freezing assembly comprising a tank body and a delivery tube, wherein the tank body is filled with a freezing medium, a first end of the delivery tube is connected to the tank body, a second end of the delivery tube is located inside the box body, and the freezing medium is delivered to the sample in the box body through the delivery tube; and

[0012] A control component includes a temperature sensor, a solenoid valve, a temperature regulator, an optical power regulator and an irradiation time regulator. The temperature sensor is arranged at the second end of the delivery pipe, the solenoid valve is arranged on the delivery pipe and connected to the temperature regulator, the optical power regulator adjusts the irradiation intensity of the ultraviolet lamp, and the temperature regulator, the optical power regulator and the irradiation time regulator are all arranged on the box.

[0013] In one embodiment, a plurality of ultraviolet lamps are provided inside the box and are arranged in a rectangular array on the inner wall of the box.

[0014] In one embodiment, a rotating base is provided below the sample stage, and the rotating base drives the sample stage to rotate.

[0015] In one embodiment, the sample stage is made of reflective material.

[0016] In one embodiment, a fan is provided on the inner wall of the box, the fan faces the sample stage, and ventilation holes are provided on the box.

[0017] In one embodiment, a battery is provided on the outer wall of the box.

[0018] In another aspect, a method for low-temperature solidification and packaging of oil-bearing rock samples is provided, comprising the following steps:

[0019] S1. Place the sample in a sample box and inject curing glue into the sample box until the sample is completely immersed;

[0020] S2. Place the sample box containing the sample on the sample table in the box, adjust the temperature regulator, inject the freezing medium into the sample box, and after reaching the preset freezing temperature, adjust the light power regulator and the irradiation time regulator to irradiate the sample with ultraviolet light;

[0021] S3. After the curing time is over, take out the sample box and observe whether the sample is completely cured and encapsulated. If so, number the sample and freeze it for storage; if not, repeat step S2 until the sample is completely cured and encapsulated.

[0022] In one embodiment, the curing adhesive is prepared by blending acrylic resin, bisphenol A resin and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:1.

[0023] In one embodiment, the temperature for low-temperature curing and packaging the sample is between -120 degrees Celsius and -100 degrees Celsius.

[0024] In one embodiment, the sample is irradiated with ultraviolet light for 30 seconds to 45 seconds.

[0025] The present invention provides a low-temperature solidification packaging device and packaging method for oil-bearing rock samples, which, compared with the prior art, has at least the following beneficial effects:

[0026] The low-temperature curing and packaging device and packaging method of the oil-containing rock sample of the present invention provides a low-temperature environment through a freezing component, and uses ultraviolet rays emitted by an ultraviolet lamp to cure and package the sample using curing glue. The temperature sensor, solenoid valve and temperature regulator in the control component jointly realize temperature regulation, and the optical power regulator and irradiation time regulator respectively regulate the irradiation intensity and time, thereby providing suitable temperature, irradiation intensity and irradiation time for the low-temperature curing and packaging of the oil-containing rock sample, solving the problem that the traditional curing process generates heat or cannot induce polymerization reaction at low temperature, maintaining the original oil-containing state of the rock sample, and meeting the needs of low-temperature curing and packaging of the oil-containing rock sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Hereinafter, the invention will be described in more detail based on embodiments with reference to the accompanying drawings.

[0028] Figure 1 2 is a schematic structural diagram of a low-temperature solidification and packaging device for oil-bearing rock samples according to an embodiment of the present invention;

[0029] Figure 2 This is a flow chart of a method for low-temperature solidification and packaging of oil-bearing rock samples in an embodiment of the present invention.

[0030] Reference numerals:

[0031] 1. Box; 11. Sample table; 12. UV lamp; 13. Rotating base; 14. Fan; 15. Ventilation hole; 2. Refrigeration component; 21. Tank; 22. Delivery pipe; 23. Pressure reducing valve; 3. Control component; 31. Temperature sensor; 32. Solenoid valve; 33. Temperature regulator; 34. Optical power regulator; 35. Irradiation time regulator; 36. Control line; 37. Display screen; 38. Emergency stop switch; 4. Battery; 5. Sample box. DETAILED DESCRIPTION

[0032] The present invention will be further described below.

[0033] like Figure 1As shown, the low-temperature curing and packaging device for oil-bearing rock samples of the present invention includes a box 1, a freezing component 2 and a control component 3. The box 1 is provided with a sample table 11 for placing the sample and an ultraviolet lamp 12 for irradiating the sample; the freezing component 2 includes a tank 21 and a delivery pipe 22. The tank 21 is filled with a freezing medium. The first end of the delivery pipe 22 is connected to the tank 21, and the second end of the delivery pipe 22 is located inside the box 1. A pressure reducing valve 23 is provided on the delivery pipe 22, and the freezing medium is delivered to the sample in the box 1 through the delivery pipe 22; the control component 3 includes a temperature sensor 31, an electromagnetic valve 32, a temperature regulator 33, an optical power regulator 34 and an irradiation time regulator 35. The temperature sensor 31 is arranged at the second end of the delivery pipe 22, the electromagnetic valve 32 is arranged on the delivery pipe 22 and connected to the temperature regulator 33, the optical power regulator 34 adjusts the irradiation intensity of the ultraviolet lamp 12, and the temperature regulator 33, the optical power regulator 34 and the irradiation time regulator 35 are all arranged on the box 1.

[0034] like Figure 2 As shown, the low-temperature curing and packaging method for oil-bearing rock samples of the present invention comprises the following steps:

[0035] S1. Place the sample in the sample box 5 and inject curing glue into the sample box 5 until the sample is completely immersed;

[0036] S2. Place the sample box 5 containing the sample on the sample table 11 in the box 1, adjust the temperature regulator 33, inject the freezing medium into the sample box 5, and after reaching the preset freezing temperature, adjust the light power regulator 34 and the irradiation time regulator 35 to irradiate the sample with ultraviolet light;

[0037] S3. After the curing time is over, take out the sample box 5 and observe whether the sample is completely cured and encapsulated. If so, number the sample and freeze it; if not, repeat step S2 until the sample is completely cured and encapsulated.

[0038] The freezing medium is liquid nitrogen or other types of cryogenic fluids. The present invention provides a low-temperature environment through the freezing component 2, and uses the ultraviolet rays emitted by the ultraviolet lamp 12 to cure and encapsulate the sample using curing glue. The temperature sensor 31, solenoid valve 32 and temperature regulator 33 in the control component 3 jointly realize temperature regulation. The optical power regulator 34 and the irradiation time regulator 35 respectively regulate the irradiation intensity and duration, thereby providing suitable temperature, irradiation intensity and irradiation duration for the low-temperature curing and encapsulation of oil-bearing rock samples, solving the problem of heat generation in the traditional curing process or the inability to induce polymerization reaction at low temperature, maintaining the original oil-containing state of the rock sample, and meeting the needs of low-temperature curing and encapsulation of oil-bearing rock samples.

[0039] The sample box 5 is a colorless and transparent acrylic container in a cubic shape with one side open, so as to facilitate observation of the reaction process.

[0040] Furthermore, the curing glue is a mixture of acrylic resin, bisphenol A resin and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:1. The temperature for low-temperature curing and packaging of the sample is between minus 120 degrees and minus 100 degrees. The time for ultraviolet irradiation of the sample is 30s to 45s, and the irradiation power is 55W to 65W.

[0041] If the proportion of acrylic resin is too high, the volume of the cured adhesive will shrink excessively after curing. When the mass proportion of acrylic resin exceeds 50%, the cured volume shrinks too violently, causing the sample to explode. Therefore, the mass proportion of acrylic resin should not exceed 50%. When the mass proportion of bisphenol A resin is increased, the viscosity of the cured adhesive increases, making it difficult to achieve mutual dissolution of the two resins, resulting in uneven curing. When the mass proportion of bisphenol A resin exceeds 80%, some cured positions are still fluid after light curing is completed, that is, some cured adhesives are not fully mixed and the curing reaction is not achieved. When the proportion of 2-hydroxy-2-methyl-1-phenyl-1-propanone increases, the intensity of the curing reaction will increase sharply. When the mass ratio exceeds 1.5%, the curing reaction will release heat violently. If the mass proportion of 2-hydroxy-2-methyl-1-phenyl-1-propanone continues to increase, the heat generated by the curing reaction will begin to directly age the cured adhesive itself, resulting in calorific value aging, that is, yellowing, which seriously affects the transparency of the cured sample.

[0042] The melting point of the liquid hydrocarbon with the smallest carbon number (n-hexane) is minus 95 degrees Celsius. Therefore, the temperature for low-temperature curing and packaging of samples should be set to a temperature lower than minus 95 degrees Celsius to reduce the escape and volatilization of hydrocarbon components in the rock samples. However, considering that too low a temperature will hinder the curing reaction, the curing and packaging temperature is set between minus 120 degrees Celsius and minus 100 degrees Celsius.

[0043] When the irradiation time is less than 30 seconds, the curing adhesive cannot be completely cured, and some curing adhesive fluid will still remain in the sample, which is not conducive to sample packaging. On the other hand, when the curing time exceeds 45 seconds, the high temperature caused by irradiation will cause thermal aging problems on the surface of the curing adhesive, causing the surface of the curing adhesive to yellow, which is not conducive to the subsequent observation of the packaged sample.

[0044] Specifically, the irradiation time regulator 35 is used to set the working time of the ultraviolet lamp 12, the temperature regulator 33 is connected to the solenoid valve 32 through the control line 36, and the temperature regulator 33 adjusts the flow of the freezing medium by controlling the on and off of the solenoid valve 32, thereby adjusting the temperature inside the sample box 5, and the light power regulator 34 is used to adjust the luminous power of the ultraviolet lamp 12 to change the irradiation intensity.

[0045] like Figure 1As shown, the control assembly 3 also includes a display screen 37 and an emergency stop switch 38 provided on the housing 1. The display screen 37 can display a variety of information, including the set temperature value, the actual temperature value (collected and fed back by the temperature sensor 31), the set irradiation time, the irradiation time that has been completed, etc. By intuitively displaying relevant information, it is convenient to guide the staff to take further actions. The emergency stop switch 38 is used to terminate the curing reaction in an emergency to ensure safety.

[0046] The front of the box 1 is an openable door (not shown in the figure), which is equipped with UV-proof glass to observe the interior of the box 1. Furthermore, the interior of the box 1 is equipped with multiple UV lamps 12 and arranged in a rectangular array on the inner wall of the box 1. The UV lamps 12 inside the box 1 are distributed on three different surfaces. Figure 1 Only one side is shown in the figure. The inner wall of the box 1 is mirror-finished, which can increase the reflection efficiency of ultraviolet light in the box 1, so that a large number of ultraviolet lamps 12 arranged in a rectangular array can fully irradiate the sample in multiple directions at the same time, thereby improving the rate and uniformity of the curing reaction.

[0047] To further improve the rate and uniformity of the curing reaction, a rotating base 13 is located below the sample stage 11. This base 13 drives the sample stage 11 to rotate. The base 13 is made of a reflective material. This material reflects ultraviolet light, thereby increasing the cross-linking rate of the curing adhesive. The base 13 also keeps the sample stage 11 rotating during the curing process, improving the uniformity of the curing reaction.

[0048] like Figure 1 As shown, a fan 14 is provided on the inner wall of the box 1, and the fan 14 faces the sample stage 11. The box 1 is provided with ventilation holes 15. The fan 14 and the ventilation holes 15 can take away the heat generated during the curing reaction, so that the curing temperature is kept within a suitable range.

[0049] like Figure 1 As shown, a battery 4 is provided on the outer wall of the box 1, so that the entire device does not require an external power supply and can work independently in places with a lack of power supply, such as suburbs and well sites far away from the power grid, avoiding the dilemma of insufficient power supply at the sampling site.

[0050] Example 1

[0051] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0052] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0053] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:1.

[0054] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0055] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -100°C;

[0056] 6. After the display screen 37 shows that the temperature reaches -100°C, adjust the optical power regulator 34 and the irradiation time regulator 35 to 35 seconds and 60W of irradiation power to irradiate the sample;

[0057] 7. After irradiation, take out the sample box 5 and observe the sample. The sample has been completely cured and encapsulated, the cured glue has high transparency, and no yellowing occurs.

[0058] Example 2

[0059] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0060] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0061] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:1.

[0062] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0063] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -110°C;

[0064] 6. After the display screen 37 shows that the temperature reaches -110°C, adjust the optical power regulator 34 and the irradiation time regulator 35 to 38 seconds and 60W of irradiation power to irradiate the sample;

[0065] 7. After irradiation, take out the sample box 5 and observe the sample. The sample has been completely cured and encapsulated, the cured glue has high transparency, and no yellowing occurs.

[0066] Example 3

[0067] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0068] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0069] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:1.

[0070] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0071] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -120°C;

[0072] 6. After the display screen 37 shows that the temperature reaches -120°C, adjust the optical power regulator 34 and the irradiation time regulator 35 to 40 seconds and 60W of irradiation power to irradiate the sample;

[0073] 7. After irradiation, take out the sample box 5 and observe the sample. The sample has been completely cured and encapsulated, the cured glue has high transparency, and no yellowing occurs.

[0074] Some process parameters in Example 1 were changed to form Examples 2 to 9. Examples 1 to 9 were compared and analyzed, and the results are shown in Table 1.

[0075] Table 1 Comparative analysis results of various embodiments

[0076]

[0077]

[0078] As can be seen from Table 1, the low-temperature curing and packaging method for oil-containing rock samples of the present invention can effectively complete the curing and packaging of rock samples, maintain the original oil-containing state of the rock samples, and meet the needs of low-temperature curing and packaging of oil-containing rock samples.

[0079] Some process parameters in Example 1 were changed to form a comparative example:

[0080] Comparative Example 1

[0081] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0082] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0083] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 51:48:1.

[0084] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0085] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -100°C;

[0086] 6. After the display screen 37 shows that the temperature reaches -100°C, adjust the optical power regulator 34 and the irradiation time regulator 35 to 35 seconds and 60W of irradiation power to irradiate the sample;

[0087] 7. After irradiation, take out the sample box 5 and observe the sample. The cured adhesive shrinks violently and the sample explodes, which is unqualified.

[0088] Comparative Example 2

[0089] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0090] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0091] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 17:82:1.

[0092] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0093] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -100°C;

[0094] 6. After the display screen 37 shows that the temperature reaches -100°C, adjust the optical power regulator 34 and the irradiation time regulator 35 to 35 seconds and 60W of irradiation power to irradiate the sample;

[0095] 7. After irradiation, take out the sample box 5 and observe the sample. The curing glue is not completely cured and is unqualified.

[0096] Comparative Example 3

[0097] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0098] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0099] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 29:69:2.

[0100] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0101] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -100°C;

[0102] 6. After the display screen 37 shows that the temperature reaches -100°C, adjust the optical power regulator 34 and the irradiation time regulator 35 to 35 seconds and 60W of irradiation power to irradiate the sample;

[0103] 7. After irradiation, take out sample box 5 and observe the sample. The cured glue is yellowed and unqualified.

[0104] Comparative Example 4

[0105] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0106] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0107] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:1.

[0108] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0109] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -100°C;

[0110] 6. After the display screen 37 shows that the temperature reaches -100°C, adjust the light power regulator 34 and the irradiation time regulator 35 to 50 seconds and 60W of irradiation power to irradiate the sample;

[0111] 7. After irradiation, take out sample box 5 and observe the sample. The cured glue is yellowed and unqualified.

[0112] Comparative Example 5

[0113] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0114] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0115] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:1.

[0116] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0117] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -100°C;

[0118] 6. After the display screen 37 shows that the temperature reaches -100°C, adjust the optical power regulator 34 and the irradiation time regulator 35 to 35 seconds and 75W of irradiation power to irradiate the sample;

[0119] 7. After irradiation, take out sample box 5 and observe the sample. The cured glue is yellowed and unqualified.

[0120] Comparative Example 6

[0121] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0122] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0123] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:1.

[0124] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0125] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -90°C;

[0126] 6. After the display screen 37 shows that the temperature reaches -90°C, adjust the light power regulator 34 and the irradiation time regulator 35 to 35 seconds and 60W of irradiation power to irradiate the sample;

[0127] 7. After irradiation, take out sample box 5 and observe the sample. The cured glue is yellowed and unqualified.

[0128] Comparative Example 7

[0129] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0130] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0131] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:1.

[0132] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0133] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -100°C;

[0134] 6. After the display screen 37 shows that the temperature reaches -100°C, adjust the optical power regulator 34 and the irradiation time regulator 35 to 25 seconds and 60W of irradiation power to irradiate the sample;

[0135] 7. After irradiation, take out the sample box 5 and observe the sample. The curing glue is not completely cured and is unqualified.

[0136] Comparative Example 8

[0137] 1. After the core sample is taken, it is placed in liquid nitrogen for pre-freezing for 2 minutes;

[0138] 2. Take out the sample, trim its shape, and prepare it into a block sample with a side length of 1.5 cm;

[0139] 3. Take a sample box 5 with a side length of 2.5 cm, add a 0.5 cm thick curing glue to the bottom of the sample box 5, place the sample into the sample box 5, and continue to add curing glue until the sample is about 1 mm below the surface. The curing glue is a mixture of acrylic resin, bisphenol A resin, and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:1.

[0140] 4. Place the sample on the sample table 11 inside the box 1 and adjust the position of the outlet of the delivery tube 22 so that it faces the upper surface of the sample;

[0141] 5. Adjust the temperature regulator 33 and set the liquid nitrogen freezing temperature to -90°C;

[0142] 6. After the display screen 37 shows that the temperature reaches -90°C, adjust the light power regulator 34 and the irradiation time regulator 35 to 35 seconds and 50W of irradiation power to irradiate the sample;

[0143] 7. After irradiation, take out the sample box 5 and observe the sample. The curing glue is not completely cured and is unqualified.

[0144] Comparing the above-mentioned Examples 1-9 with Comparative Examples 1-8, it can be seen that the packaging of the oil-bearing rock samples in Comparative Examples 1-8 is unqualified, while the low-temperature curing packaging device and packaging method of the oil-bearing rock samples of the present invention can effectively package the oil-bearing rock samples.

[0145] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A low-temperature solidification and packaging device for oil-bearing rock samples, characterized in that: include: A box body, inside of which is provided a sample table for placing samples and an ultraviolet lamp for irradiating the samples; A freezing assembly comprising a tank body and a delivery tube, wherein the tank body is filled with a freezing medium, a first end of the delivery tube is connected to the tank body, a second end of the delivery tube is located inside the box body, and the freezing medium is delivered to the sample in the box body through the delivery tube; as well as A control component includes a temperature sensor, a solenoid valve, a temperature regulator, an optical power regulator and an irradiation time regulator. The temperature sensor is arranged at the second end of the delivery pipe, the solenoid valve is arranged on the delivery pipe and connected to the temperature regulator, the optical power regulator adjusts the irradiation intensity of the ultraviolet lamp, and the temperature regulator, the optical power regulator and the irradiation time regulator are all arranged on the box.

2. The low-temperature curing and packaging device for oil-bearing rock samples according to claim 1, characterized in that: A plurality of ultraviolet lamps are provided inside the box and arranged in a rectangular array on the inner wall of the box.

3. The low-temperature curing and packaging device for oil-bearing rock samples according to claim 1, characterized in that: A rotating base is provided below the sample stage, and the rotating base drives the sample stage to rotate.

4. The low-temperature solidification packaging device for oil-bearing rock samples according to claim 1, characterized in that: The sample stage is made of reflective material.

5. The low-temperature solidification and packaging device for oil-bearing rock samples according to claim 1, characterized in that: A fan is provided on the inner wall of the box body, and the fan faces the sample stage. Ventilation holes are provided on the box body.

6. The low-temperature solidification packaging device for oil-bearing rock samples according to claim 1, characterized in that: Batteries are arranged on the outer wall of the box.

7. A low-temperature solidification and packaging method for oil-bearing rock samples, characterized in that: The steps include: S1. Place the sample in a sample box and inject curing glue into the sample box until the sample is completely immersed; S2. Place the sample box containing the sample on the sample table in the box, adjust the temperature regulator, inject the freezing medium into the sample box, and after reaching the preset freezing temperature, adjust the light power regulator and the irradiation time regulator to irradiate the sample with ultraviolet light; S3. After the curing time is over, take out the sample box and observe whether the sample is completely cured and encapsulated. If so, number the sample and freeze it for storage; if not, repeat step S2 until the sample is completely cured and encapsulated.

8. The low-temperature curing and packaging method for oil-bearing rock samples according to claim 7, characterized in that: The curing glue is prepared by mixing acrylic resin, bisphenol A resin and 2-hydroxy-2-methyl-1-phenyl-1-propanone in a mass ratio of 30:69:

1.

9. The low-temperature curing and packaging method for oil-bearing rock samples according to claim 7, characterized in that: The temperature for low-temperature curing and packaging the sample is between -120 degrees Celsius and -100 degrees Celsius.

10. The low-temperature curing and packaging method for oil-bearing rock samples according to claim 7, characterized in that: The sample is irradiated with ultraviolet light for 30 to 45 seconds.

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