Method and device for measuring porosity of hole type reservoir and application of method and device

Abstract

The invention provides a method and a device for measuring porosity of a hole type reservoir and application of the method and the device. According to the measurement method, firstly, the more accurate rock sample skeleton volume can be obtained through a vacuumizing pressurization saturation helium method, and meanwhile, the measurement precision of the rock sample appearance volume and the surface corrosion hole volume can be effectively improved by utilizing the three-dimensional scanning measurement and image processing technology of the rock sample before coating and the rock sample after coating, namely, the measurement precision of the rock sample appearance volume and the surface corrosion hole volume can be effectively improved. According to the method, the rock sample appearance volume and the surface corrosion hole volume can be obtained more accurately, saturated fluid is not needed in the whole measurement method, the porosity of the hole type carbonate rock sample can be obtained accurately, rapidly and nondestructively through a calculation formula, and compared with a traditional rock physical experiment measurement method, the method is simpler and more convenient, and the result is more accurate.

Description

Technical Field

[0001] The invention belongs to the field of petroleum and natural gas geology and exploration and development engineering, and specifically relates to a method and a device for measuring the porosity of a hole-type reservoir and applications thereof. Background Art

[0002] Porosity is an important parameter for reservoir characterization. Therefore, accurate measurement of rock sample porosity is of great significance for reservoir quality evaluation, oil content evaluation and production capacity prediction. At present, the traditional methods for determining porosity mainly include: helium method, saturated liquid method, nuclear magnetic resonance method, etc.

[0003] However, for porous carbonate reservoirs, the helium method cannot fully saturate the rock sample, and the saturated liquid method cannot be completely saturated due to the influence of the dissolution holes on the outer surface of the rock sample, and the saturated liquid may destroy the pore structure of the rock sample. At the same time, when the traditional method measures irregular rock samples, there is a deviation in the calculation of the apparent volume, which has a non-negligible impact on the accuracy of the porosity calculation. Therefore, how to accurately measure the porosity of porous carbonate rocks has become an urgent problem to be solved. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a method for measuring the porosity of a vug-type reservoir and its application. The method can effectively improve the measurement accuracy of the porosity.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a method for measuring the porosity of a vuggy carbonate reservoir, comprising the following steps:

[0007] S1: The porous carbonate rock sample is tested by vacuum pressurized saturated helium method to obtain the rock sample skeleton volume v g ;

[0008] The pores of the vug-type carbonate rock sample include internal pores and surface dissolution pores;

[0009] S2: Use a 3D scanner to perform 3D scanning and measurement on the vug-type carbonate rock samples and establish a 3D rock sample model;

[0010] S3: coating the vug-type carbonate rock sample to ensure that the surface dissolution holes are completely coated, and continue to perform three-dimensional scanning measurement with reference to step S2 to establish a three-dimensional rock sample model after coating;

[0011] S4: Analyze the three-dimensional rock sample model and the three-dimensional rock sample model after coating to obtain the rock sample appearance volume v3 and the surface dissolution pore volume v4; the rock sample appearance volume v3 is the rock sample skeleton volume v g The sum of the volume of the internal pores;

[0012] S5: Calculate the porosity according to the following formula: ;

[0013] .

[0014] Preferably, the vacuum pressurized saturated helium method test is:

[0015] The vug-type carbonate rock sample was placed in a core cup in a vacuum environment, and helium gas above 200 psi was injected into the reference chamber, which was recorded as the initial absolute pressure of the reference chamber. After the pressure stabilizes, open the connecting valve. After the equilibrium time is more than 240 minutes, record the absolute pressure after equilibrium in the reference chamber. The rock sample skeleton volume is determined according to the following formula: :

[0016] ;

[0017] is the volume of the reference chamber, cm 3 ; is the core cup volume, cm 3 ; is the volume of the vug-type carbonate rock sample, cm 3 ; is the volume of the rock sample skeleton, cm 3 .

[0018] Preferably, the pressure of helium in the reference chamber is 200-1000 psi.

[0019] Preferably, the equilibration time is 240-600 min.

[0020] Preferably, the three-dimensional scanning measurement in step S2 is: scanning the hole-type carbonate rock sample by non-contact fringe grating fully automatic rotation scanning to obtain a two-dimensional image, and performing image stitching to obtain a three-dimensional rock sample model.

[0021] Preferably, the image stitching is performed by any one of landmark stitching, feature stitching or manual stitching.

[0022] Preferably, the image stitching further includes grid editing processing.

[0023] Preferably, the mesh editing process is: generating a mesh, optimizing a mesh, adjusting a texture, smoothing, and removing isolated surfaces on the image obtained after splicing.

[0024] Preferably, the coating treatment uses PVC heat shrinkable plastic film to wrap the porous carbonate rock sample.

[0025] Preferably, the analysis in step S4 is automatically performed by a three-dimensional scanner.

[0026] It should be noted that the present invention does not impose any particular limitation on the analysis, and the analysis can generally be performed automatically by a three-dimensional scanner.

[0027] In a second aspect, the present invention provides a device for measuring the porosity of a vug-type carbonate reservoir, comprising:

[0028] A testing unit, used for conducting a vacuum pressurized saturated helium test on a vug-type carbonate rock sample; the pores of the vug-type carbonate rock sample include internal pores and surface dissolution pores;

[0029] The first calculation unit is used to calculate the test data obtained by the test unit to obtain the rock sample skeleton volume v g ;

[0030] The first scanning unit is used to perform three-dimensional scanning on the vug-type carbonate rock sample to obtain a three-dimensional rock sample model;

[0031] A processing unit, used for coating the surface dissolution holes of the vug-type carbonate rock sample;

[0032] A second scanning unit is used to perform three-dimensional scanning on the vug-type carbonate rock sample obtained by the processing unit to obtain a three-dimensional rock sample model;

[0033] An analysis unit is used to analyze the three-dimensional rock sample model obtained by the first scanning unit and the second scanning unit to obtain the rock sample appearance volume v3 and the surface dissolution hole volume v4;

[0034] The second calculation unit is used to calculate the porosity according to the following formula ;

[0035] .

[0036] In a third aspect, the present invention also provides an application of the above-mentioned measurement method or measurement device in the quality evaluation of porous carbonate reservoirs.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The present invention provides a method for measuring the porosity of a vug-type carbonate reservoir. The method firstly obtains a more accurate rock sample skeleton volume by a vacuum-pressurized saturated helium method. Meanwhile, by using three-dimensional scanning measurement and image processing technology of the rock sample before and after coating, the measurement accuracy of the rock sample appearance volume and the surface dissolution hole volume can be effectively improved, that is, a more accurate rock sample appearance volume and the surface dissolution hole volume can be obtained. In addition, no saturated fluid is required in the entire measurement method. The porosity of the vug-type carbonate rock sample can be accurately, quickly and non-destructively obtained through a calculation formula. Compared with the traditional rock physics experimental measurement method (such as the conventional porosity measurement method such as the helium method and the saturated water weighing method), the method is simpler and the result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the process of measuring the porosity of a vug-type carbonate reservoir provided by the present invention;

[0040] Figure 2 is an actual image of the vug-type carbonate rock sample provided in Example 1;

[0041] Figure 3 are actual images of the top and bottom surfaces of the vug-type carbonate rock sample provided in Example 1 (top on the left and bottom on the right);

[0042] Figure 4 It is a schematic diagram of a device for vacuuming and pressurizing saturated helium gas testing provided by the present invention;

[0043] Figure 5 is a three-dimensional image of the circumference of the vug-type carbonate rock sample provided in Example 1;

[0044] Figure 6 are scanned images of the top and bottom surfaces of the vug-type carbonate rock sample provided in Example 1;

[0045] Figure 7 The actual image of the vug-type carbonate rock sample provided in Example 1 after coating treatment;

[0046] Figure 8 The three-dimensional image of the circumference of the porous carbonate rock sample provided in Example 1 is obtained by scanning after the coating treatment. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0048] In view of the problem in the prior art that when measuring irregular rock samples using traditional methods, the apparent volume calculation has deviations, resulting in low porosity calculation accuracy, the present invention provides a method for measuring the porosity of a vug-type carbonate reservoir, comprising the following steps:

[0049] S1: The porous carbonate rock sample is tested by vacuum pressurized saturated helium method to obtain the rock sample skeleton volume v g ;

[0050] The pores of the vug-type carbonate rock sample include internal pores and surface dissolution pores;

[0051] S2: Use a 3D scanner to perform 3D scanning and measurement on the vug-type carbonate rock samples and establish a 3D rock sample model;

[0052] S3: coating the vug-type carbonate rock sample to ensure that the surface dissolution holes are completely coated, and continue to perform three-dimensional scanning measurement with reference to step S2 to establish a three-dimensional rock sample model after coating;

[0053] S4: Analyze the three-dimensional rock sample model and the three-dimensional rock sample model after coating to obtain the rock sample appearance volume v3 and the surface dissolution pore volume v4; the rock sample appearance volume v3 is the rock sample skeleton volume v g The sum of the volume of the internal pores;

[0054] S5: Calculate the porosity according to the following formula: ;

[0055] .

[0056] In the present invention, the vug-type carbonate rock sample (also referred to as: rock sample) is a Cambrian dolomite reservoir plug sample.

[0057] According to the present invention, the porous carbonate rock sample is first tested by vacuum pressurized saturated helium method to obtain the rock sample skeleton volume v g .

[0058] Specifically, the vacuum pressurized saturated helium method test is:

[0059] The vug-type carbonate rock sample was placed in a core cup in a vacuum environment, and helium gas above 200 psi was injected into the reference chamber, which was recorded as the initial absolute pressure of the reference chamber. After the pressure stabilizes, open the connecting valve. After the equilibrium time is more than 240 minutes, record the absolute pressure after equilibrium in the reference chamber. According to Boyle's law, the rock sample skeleton volume is determined according to the following equations (1) and (2): :

[0060] (1)

[0061] (2)

[0062] is the initial absolute pressure of the reference chamber, MPa; is the absolute pressure in the reference chamber after equilibrium, is the volume of the reference chamber, cm 3 ; is the core cup volume, cm 3 ; is the volume of the vug-type carbonate rock sample, cm 3 ; is the volume of the rock sample skeleton, cm 3 .

[0063] In the present invention, it is preferred that the pressure of the helium in the reference chamber is above 200 psi and the equilibrium time is above 240 min to ensure that the helium in the reference chamber can be completely dispersed into the core cup and fill the internal pores in the vug-type carbonate rock sample.

[0064] In some embodiments of the present invention, the pressure of helium in the reference chamber is preferably 200-1000 psi, such as 200 psi, 300 psi, 400 psi, 500 psi, 600 psi, 700 psi, 800 psi, 900 psi or 1000 psi.

[0065] In some embodiments of the present invention, the equilibration time is 240 to 600 min, such as 240 min, 280 min, 320 min, 360 min, 400 min, 440 min, 480 min, 520 min, 560 min or 600 min.

[0066] The point values ​​listed above are for enumeration purposes only. Other point values ​​within the numerical range are applicable. To avoid complexity, they will not be listed here one by one.

[0067] In some specific embodiments of the present invention, it is preferred to follow Figure 2 The schematic diagram of the device is shown in the figure. After placing the vug-type carbonate rock sample into the core cup, the entire system is evacuated (usually for more than 15 minutes). The gas supply valve is opened and 1000 psi of helium is injected into the reference chamber. The initial absolute pressure of the reference chamber is recorded as After the pressure stabilizes, open the connecting valve and balance for 480 min to fully saturate the sample. Record the absolute pressure after balance in the reference chamber. .in, 44.85 cm3 ; 30.07 cm 3 ; 11.09 cm 3 , 1000 psi, is 831 psi. According to the above formulas (1) and (2), we can calculate 18.90 cm 3 .

[0068] The present invention implements a technical solution of initial absolute pressure and equilibrium time of different reference chambers, as shown in Table 1.

[0069] Table 1

[0070]

[0071] In the present invention, the three-dimensional scanning measurement in the above step S2 is: after scanning the hole-type carbonate rock sample by non-contact fringe grating fully automatic rotation scanning method, a two-dimensional image is obtained, and the image is stitched to obtain a three-dimensional rock sample model.

[0072] The image stitching can be performed by any one of mark point stitching, feature stitching or manual stitching.

[0073] In some preferred embodiments of the present invention, the image stitching further includes a grid editing process.

[0074] The mesh editing process preferably includes: generating a mesh, optimizing a mesh, adjusting a texture, smoothing, and removing isolated surfaces on the image obtained after the splicing.

[0075] In some embodiments of the present invention, step S2 preferably includes: using a three-dimensional scanner to perform three-dimensional scanning measurement on the porous carbonate rock sample, setting a certain working distance and scanning accuracy, and then performing non-contact stripe grating fully automatic rotation scanning to complete image stitching, and completing image modeling through the steps of generating a grid, optimizing the grid, adjusting the texture, smoothing, and removing isolated surfaces to obtain a three-dimensional model of the porous carbonate rock sample (i.e., a three-dimensional rock sample model before coating).

[0076] In the present invention, the models of the above-mentioned three-dimensional scanners can be reasonably selected without special restrictions, and their working distance and scanning accuracy can also be set within a reasonable range. In a specific embodiment of the present invention, the three-dimensional scanner uses a Transcan C variable resolution color 3D scanner, and its working distance is set to 260 mm and the scanning accuracy is set to 0.035 mm; or the working distance can also be 480 mm, and the corresponding scanning accuracy is 0.05 mm.

[0077] According to the present invention, after a three-dimensional scanning measurement of a rock sample is performed using a three-dimensional scanner, the rock sample is coated so that the surface dissolution holes of the rock sample are completely coated. Subsequently, a three-dimensional scanning measurement is performed again according to the contents of the above technical solution to obtain a three-dimensional rock sample model after coating.

[0078] In some embodiments of the present invention, the coating treatment can be performed according to technical means well known to those skilled in the art. Generally, PVC heat shrinkable plastic film is used to wrap the porous carbonate rock sample.

[0079] After obtaining the three-dimensional rock sample models before and after the coating, according to the present invention, the three-dimensional rock sample models are analyzed to obtain the rock sample appearance volume v3 and the surface dissolution pore volume v4, wherein the rock sample appearance volume v3 is the rock sample skeleton volume v4. g The sum of the volume of the internal pores.

[0080] In some embodiments of the present invention, the three-dimensional rock sample models before and after coating are preferably non-closedly encapsulated and divided into grids, and grid optimization processing such as filtering, optimization, removal of isolated surfaces, and removal of spikes is performed. The three-dimensional rock sample model before coating is analyzed to obtain the accurate appearance volume V3 of the rock sample, which is used to characterize the skeleton volume and internal pore volume of the rock sample; the three-dimensional rock sample model after coating is analyzed to obtain the total volume V5 of the rock sample, which is used to characterize the rock skeleton volume, internal pore volume and surface dissolution pore volume. The difference between V5 and V3 is the surface dissolution pore volume, recorded as V4.

[0081] Finally, the rock sample skeleton volume v is obtained g , rock sample appearance volume V3, surface dissolution pore volume V4, and the rock sample porosity is calculated according to formula (3): .

[0082] (3).

[0083] In summary, the measurement method provided by the present invention firstly obtains a more accurate rock sample skeleton volume by the vacuum pressurized saturated helium method. At the same time, the three-dimensional scanning measurement and image processing technology of the rock samples before and after the coating can effectively improve the measurement accuracy of the rock sample appearance volume and the surface dissolution pore volume, that is, a more accurate rock sample appearance volume and surface dissolution pore volume can be obtained. In addition, no saturated fluid is required in the entire measurement method. Through the calculation formula, the porosity of the porous carbonate rock sample can be accurately, quickly and non-destructively obtained. It is simpler than the traditional rock physics experimental measurement method, and the result is more accurate.

[0084] The present invention also provides a device for measuring the porosity of a vug-type carbonate reservoir, comprising:

[0085] A testing unit, used for conducting a vacuum pressurized saturated helium test on a vug-type carbonate rock sample; the pores of the vug-type carbonate rock sample include internal pores and surface dissolution pores;

[0086] The first calculation unit is used to calculate the test data obtained by the test unit to obtain the rock sample skeleton volume v g ;

[0087] A first scanning unit is used to perform three-dimensional scanning on the rock sample to obtain a three-dimensional rock sample model;

[0088] A processing unit, used for coating the surface dissolution holes of the rock sample;

[0089] A second scanning unit is used to perform three-dimensional scanning on the rock sample obtained by the processing unit to obtain a three-dimensional rock sample model;

[0090] An analysis unit is used to analyze the three-dimensional rock sample model obtained by the first scanning unit and the second scanning unit to obtain the rock sample appearance volume v3 and the surface dissolution hole volume v4;

[0091] The second calculation unit is used to calculate the porosity according to the following formula ;

[0092] .

[0093] The present invention also provides the application of the above-mentioned measuring method or measuring device in the quality evaluation of vuggy carbonate reservoirs.

[0094] In order to further illustrate the present invention, the following examples are used to provide a detailed description. The vuggy carbonate rock samples used in the following examples of the present invention are Cambrian dolomite reservoir plug samples.

[0095] Example 1

[0096] This embodiment follows Figure 1 The process diagram shown in the figure is used to test the porosity of the vug-type carbonate rock sample. The specific method is as follows:

[0097] Step (1): For the vug-type carbonate rock sample (the actual picture is as follows Figure 2~3 The porosity measurement was carried out by vacuum pressurized saturated helium method (see the schematic diagram). Figure 4 , put the standard block of the vug-type carbonate rock sample in the core cup and evacuate it, then inject 1000 psi of helium into the reference chamber and record it as the reference chamber pressure After the pressure stabilizes, open the connecting valve and balance for 480 min to fully saturate the sample. Record the absolute pressure after equilibrium. , calculate the rock skeleton volume according to formula (1) and (2) ;

[0098] (1)

[0099] (2)

[0100] in, is the initial absolute pressure of the reference chamber, MPa; is the absolute pressure after equilibrium, MPa; is the volume of the reference chamber, cm 3 ; is the core cup volume, cm 3 ; is the volume of the standard block of the vug-type carbonate rock sample in the core cup, cm 3 ; is the volume of the rock sample skeleton, cm 3 ;

[0101] 44.85 cm 3 ; 30.07 cm 3 ; 11.09 cm 3 , 1000 psi, is 831 psi, calculated, 18.90 cm 3 .

[0102] Step (2): A Transcan C variable-resolution color 3D scanner was used to perform three-dimensional scanning and measurement of the porous carbonate rock sample. The working distance was set to 260 mm, the scanning accuracy was 0.035 mm, and a non-contact fringe grating fully automatic rotation scanning method was adopted. Manual stitching was selected to complete image stitching. After the steps of generating a grid, optimizing the grid, adjusting the texture, smoothing, and removing isolated surfaces, the three-dimensional image modeling of the porous carbonate rock sample was completed. Figure 5 , Figure 6 The three-dimensional scanning results of the circumference, top and bottom surfaces of the vug-type carbonate rock sample are shown.

[0103] Step (3): After coating the porous carbonate rock sample with PVC heat shrinkable plastic film, ensure that the surface dissolution holes of the rock sample are completely covered (see Figure 7 ), perform three-dimensional scanning measurement again, and the image scanning and processing steps are the same as step (2) to obtain a three-dimensional image of the rock sample after coating (see Figure 8 ).

[0104] Step (4): The three-dimensional images obtained in steps (2) and (3) are non-closedly packaged and meshed, and mesh optimization processes such as filtering, optimization, removing isolated surfaces, and removing spikes are performed. The three-dimensional rock sample model before the coating is analyzed to obtain the accurate appearance volume V3 of the rock sample, which is used to characterize the skeleton volume and internal pore volume of the rock sample. The three-dimensional rock sample model after the coating is analyzed to obtain the total volume V5 of the rock sample, which is used to characterize the skeleton volume, internal pore volume, and surface dissolution pore volume. The difference between V5 and V3 is the surface dissolution pore volume, which is recorded as V4. Among them, 19.52 cm 3 , V5 is 19.91 cm 3 , 0.39 cm 3 .

[0105] Step (5): Calculate the true porosity of the rock sample using formula (3): ;

[0106] (3)

[0107] in, is the apparent volume of the rock sample, cm 3 ; is the sum of the surface dissolution pore volumes of the rock sample, cm 3 ;

[0108] The above steps calculated =18.90 cm 3 , =19.52 cm 3 , =0.39 cm 3 Substituting into formula (3), we can get =5.1%.

[0109] It can be seen that the embodiment of the present invention provides a method for measuring the porosity of porous carbonate rock samples. Through vacuum pressure saturation, three-dimensional scanning measurement and image processing technology, the measurement accuracy of the rock sample skeleton volume, appearance volume and external surface dissolution pore volume is effectively improved, and no saturation fluid is required. The porosity of porous carbonate rock samples can be accurately, quickly and non-destructively obtained. Compared with traditional rock physics experimental measurement methods, it is simpler and the results are more accurate.

[0110] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for measuring the porosity of a vug-type carbonate reservoir, characterized in that: The following steps are involved: S1: The porous carbonate rock sample is tested by vacuum pressurized saturated helium method to obtain the rock sample skeleton volume v g ; The pores of the vug-type carbonate rock sample include internal pores and surface dissolution pores; S2: Use a 3D scanner to perform 3D scanning and measurement on the vug-type carbonate rock samples and establish a 3D rock sample model; S3: coating the vug-type carbonate rock sample to ensure that the surface dissolution holes are completely coated, and continue to perform three-dimensional scanning measurement with reference to step S2 to establish a three-dimensional rock sample model after coating; S4: Analyze the three-dimensional rock sample model and the three-dimensional rock sample model after coating to obtain the rock sample appearance volume v3 and the surface dissolution pore volume v4; the rock sample appearance volume v3 is the rock sample skeleton volume v g The sum of the volume of the internal pores; S5: Calculate the porosity according to the following formula: ; 。 2. The measuring method according to claim 1, characterized in that: The vacuum pressurized saturated helium method test is: The vug-type carbonate rock sample was placed in a core cup in a vacuum environment, and helium gas above 200 psi was injected into the reference chamber, which was recorded as the initial absolute pressure of the reference chamber. After the pressure stabilizes, open the connecting valve. After the equilibrium time is more than 240 minutes, record the absolute pressure after equilibrium in the reference chamber. , the rock sample skeleton volume is determined according to the following formula : ； is the volume of the reference chamber, cm 3 ; is the core cup volume, cm 3 ; is the volume of the vug-type carbonate rock sample, cm 3 ; is the volume of the rock sample skeleton, cm 3 .

3. The measuring method according to claim 2, characterized in that: The pressure of helium in the reference chamber is 200-1000 psi; The equilibration time is 240-600 min.

4. The measuring method according to any one of claims 1 to 3, characterized in that: The three-dimensional scanning measurement in step S2 is: after scanning the hole-type carbonate rock sample by a non-contact fringe grating fully automatic rotating scanning method, a two-dimensional image is obtained, and the image is stitched to obtain a three-dimensional rock sample model.

5. The measuring method according to claim 4, characterized in that: The image stitching is performed by any one of mark point stitching, feature stitching or manual stitching.

6. The measuring method according to claim 4 or 5, characterized in that: The image stitching also includes a grid editing process; The mesh editing process is: generating a mesh, optimizing the mesh, adjusting the texture, smoothing and removing isolated faces on the image obtained after splicing.

7. The measuring method according to any one of claims 1 to 6, characterized in that: The coating treatment uses PVC heat shrinkable plastic film to wrap the porous carbonate rock sample.

8. The measuring method according to any one of claims 1 to 7, characterized in that: The analysis in step S4 is automatically performed by a three-dimensional scanner.

9. A device for measuring porosity of a vug-type carbonate reservoir, characterized in that: include: A test unit, used for testing the porous carbonate rock samples by vacuuming and pressurizing them with saturated helium; The pores of the vug-type carbonate rock sample include internal pores and surface dissolution pores; The first calculation unit is used to calculate the test data obtained by the test unit to obtain the rock sample skeleton volume v g ; The first scanning unit is used to perform three-dimensional scanning on the vug-type carbonate rock sample to obtain a three-dimensional rock sample model; A processing unit, used for coating the surface dissolution holes of the vug-type carbonate rock sample; A second scanning unit is used to perform three-dimensional scanning on the vug-type carbonate rock sample obtained by the processing unit to obtain a three-dimensional rock sample model; An analysis unit is used to analyze the three-dimensional rock sample model obtained by the first scanning unit and the second scanning unit to obtain the rock sample appearance volume v3 and the surface dissolution hole volume v4; The second calculation unit is used to calculate the porosity according to the following formula ; 。 10. Application of the measuring method according to any one of claims 1 to 8 or the measuring device according to claim 9 in the quality evaluation of vuggy carbonate reservoirs.

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