Shale mineral surface wettability measuring device

Abstract

The utility model discloses a shale mineral surface wettability measuring device, relates to the technical field of measuring devices, and solves the problems that a probe of an existing device is mounted on a loading device and cannot scan all positions on the surface of a shale mineral; according to the scheme, the device comprises a measuring box, the top of the measuring box is fixedly connected with a top cover in a sealed mode, and a shale mineral placing plate is placed at the inner bottom of the measuring box; a position adjusting mechanism is fixedly installed on the lower surface of the top cover, and the movable end of the position adjusting mechanism is fixedly connected with a loading plate. The atomic force microscope probe can be driven to move through the arranged position adjusting mechanism, so that all positions on the surface of shale mineral can be conveniently scanned; water can be dripped after the air is exhausted through the liquid dripping mechanism, so that the influence on the measurement accuracy caused by taking away the water due to air flow is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a shale mineral surface wettability measuring device. Background Art

[0002] Wettability is an important reservoir rock property that needs to be considered in oil and gas development. It can significantly affect the distribution and migration of fluids (oil, gas, water, etc.) in the reservoir pores, and is therefore a key factor in determining oil and gas recovery. In order to improve the recovery rate, it is usually necessary to evaluate the reservoir wettability first. After searching, the Chinese patent publication number CN214952862U discloses a device for measuring the surface wettability of oil and gas reservoir rock minerals, which relates to the field of oil and gas development technology. The device includes a closed cavity and an atomic force microscope. The probe of the atomic force microscope penetrates into the closed cavity; the closed cavity is provided with a gas inlet and a gas outlet. The measuring device of the utility model includes a closed cavity, and the sample to be tested is placed in the closed cavity for measurement, which eliminates the influence of external environmental factors on the measurement results. At the same time, an atomic force microscope is used to accurately scan the surface of the oil and gas reservoir rock mineral with droplets, and the contact angle of the droplets on the surface of the mineral particles is accurately calculated through the three-dimensional morphology of the droplets, which can achieve the purpose of directly measuring the surface wettability of single mineral particles at the micron level. The measuring method of the utility model is simple to operate and has high measuring result accuracy.

[0003] Although the above technical solution can realize the wettability measurement of shale minerals, the probe is installed on the loading device during use, and the position is fixed and cannot scan various positions on the surface of the shale mineral. In addition, when measuring, water is added dropwise and then exhausted, which can easily evaporate and blow away the water, which not only affects the spreading of water but also affects the measurement results. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a shale mineral surface wettability measuring device, which solves the problem in the background technology that the probe of the prior device is installed on a loading device and cannot scan various positions on the surface of the shale mineral, and during measurement, water is dripped and then exhausted, which easily causes the water to evaporate and blow away, which not only affects the spreading of water but also affects the measurement results.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a shale mineral surface wettability measuring device, comprising a measuring box, the top of the measuring box is sealed and fixedly connected with a top cover, a shale mineral placement plate is placed on the inner bottom of the measuring box, a position adjustment mechanism is fixedly installed on the lower surface of the top cover, a loading plate is fixedly connected to the movable end of the position adjustment mechanism, an atomic force microscope probe is fixedly installed on the lower surface of the loading plate, and a drip mechanism is installed through the upper surface of the top cover;

[0006] The position adjustment mechanism includes two support plates symmetrically fixedly connected to the lower surface of the top cover, a first screw rod is rotatably connected between the two support plates, the outer surface of the first screw rod is threadedly connected to a first slider slidably connected to the lower surface of the top cover, the bottom end of the first slider is fixedly connected to a U-shaped frame, the inside of the U-shaped frame is rotatably connected with a second screw rod, the outer surface of the second screw rod is threadedly connected to a second slider slidably connected to the inner wall of the U-shaped frame, and the loading plate is fixedly mounted on the bottom end of the second slider.

[0007] Preferably, the first screw rod and the second screw rod are arranged perpendicular to each other, so as to facilitate the movement and adjustment of the atomic force microscope probe to various positions in the horizontal direction.

[0008] Preferably, a first motor is fixedly mounted on the outer surface of any one of the support plates, and the output shaft of the first motor is fixedly connected to one end of the first screw rod. A second motor is fixedly mounted on the outer surface of the U-shaped frame, and the output shaft of the second motor is fixedly connected to one end of the second screw rod, so as to respectively drive the first screw rod and the second screw rod to rotate.

[0009] Preferably, the dripping mechanism includes a dripping tube that penetrates through and is sealed and slidably connected to the center position of the upper surface of the top cover, the top end of the dripping tube is fixedly connected to a first control valve, the other end of the first control valve is fixedly connected to a syringe, and the outer surface of the dripping tube is sealed and slidably connected to a support tube that is fixedly connected to the upper surface of the top cover, so as to facilitate dripping water onto the surface of the shale mineral.

[0010] Preferably, an electric push rod is fixedly mounted on the upper surface of the top cover, a connecting plate is fixedly connected to the top end of the electric push rod, and one end of the connecting plate is fixedly sleeved on the outer surface of the drip tube to automatically drive the drip tube to rise and fall.

[0011] Preferably, an air inlet pipe and an air outlet pipe are fixedly connected to each other on both sides of the outer surface of the measuring box, and one end of the air inlet pipe and the air outlet pipe are fixedly connected to a second control valve to facilitate the control of air inlet and air outlet.

[0012] The utility model provides a device for measuring the wettability of shale mineral surfaces. It has the following beneficial effects:

[0013] 1. The device for measuring the wettability of the surface of shale minerals can drive the atomic force microscope probe to move to various positions in the horizontal direction through a position adjustment mechanism, so as to facilitate scanning of various positions on the surface of the shale mineral and improve the accuracy of the measurement, thereby solving the problem that the probe of the existing device is installed on the loading device and is fixed in position and cannot scan various positions on the surface of the shale mineral.

[0014] 2. The device for measuring the surface wettability of shale minerals can drip water after the air is exhausted by means of a dripping mechanism, thereby preventing the air flow from carrying away the water and affecting the accuracy of the measurement, thereby solving the problem that the existing device is easy to evaporate and blow away the water after dripping water and then exhausting the air, which not only affects the water spreading but also affects the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the measuring box of the utility model;

[0017] Figure 3 This is a schematic structural diagram of the top cover of the utility model from another angle.

[0018] In the figure, 1. measuring box; 2. top cover; 3. shale mineral placement plate; 4. position adjustment mechanism; 41. support plate; 42. first screw rod; 43. first slider; 44. U-shaped frame; 45. second screw rod; 46. second slider; 47. first motor; 48. second motor; 5. loading plate; 6. atomic force microscope probe; 7. dripping mechanism; 71. dripping tube; 72. first control valve; 73. syringe; 74. support tube; 75. electric push rod; 76. connecting plate; 8. air inlet pipe; 9. air outlet pipe; 10. second control valve. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Embodiment 1:

[0021] like Figure 1 and Figure 3As shown, a shale mineral surface wettability measuring device comprises a measuring box 1, the top of the measuring box 1 is sealed and fixedly connected with a top cover 2, a shale mineral placing plate 3 is placed at the inner bottom of the measuring box 1, a position adjustment mechanism 4 is fixedly installed on the lower surface of the top cover 2, a loading plate 5 is fixedly connected to the movable end of the position adjustment mechanism 4, an atomic force microscope probe 6 is fixedly installed on the lower surface of the loading plate 5, the position adjustment mechanism 4 comprises two support plates 41 symmetrically fixedly connected to the lower surface of the top cover 2, a first screw rod 42 is rotatably connected between the two support plates 41, a first slider 43 slidably connected to the lower surface of the top cover 2 is threadedly connected to the outer surface of the first screw rod 42, a U-shaped frame 44 is fixedly connected to the bottom end of the first slider 43, a second screw rod 45 is rotatably connected to the inside of the U-shaped frame 44, a second slider 46 slidably connected to the inner wall of the U-shaped frame 44 is threadedly connected to the outer surface of the second screw rod 45, and the loading plate 5 is fixedly installed at the bottom end of the second slider 46. The first screw rod 42 and the second screw rod 45 are arranged perpendicular to each other. A first motor 47 is fixedly installed on the outer surface of any one of the support plates 41, and the output shaft of the first motor 47 is fixedly connected to one end of the first screw rod 42. A second motor 48 is fixedly installed on the outer surface of the U-shaped frame 44, and the output shaft of the second motor 48 is fixedly connected to one end of the second screw rod 45. The rotation of the first motor 47 and the second motor 48 can respectively drive the first screw rod 42 and the second screw rod 45 to rotate, and then drive the first slider 43 and the second slider 46 to move, thereby driving the atomic force microscope probe 6 to move to various positions in the horizontal direction, which is convenient for scanning various positions on the surface of the shale mineral and improving the accuracy of the measurement, thereby solving the problem that the probe of the existing device is installed on the loading device and is fixed in position and cannot scan various positions on the surface of the shale mineral.

[0022] Embodiment 2:

[0023] like Figure 1 and Figure 3As shown, a dripping mechanism 7 is installed through the upper surface of the top cover 2, and the dripping mechanism 7 includes a dripping tube 71 that is sealed and slidably connected to the center position of the upper surface of the top cover 2. The top end of the dripping tube 71 is fixedly connected to a first control valve 72, and the other end of the first control valve 72 is fixedly connected to a syringe 73. The outer surface of the dripping tube 71 is sealed and slidably connected to a support tube 74 that is fixedly connected to the upper surface of the top cover 2. An electric push rod 75 is fixedly installed on the upper surface of the top cover 2, and the top end of the electric push rod 75 is fixedly connected to a connecting plate 76, and one end of the connecting plate 76 is fixedly sleeved on the outer surface of the dripping tube 71. The operation of the electric push rod 75 can drive the connecting plate 76 and the dripping tube 71 to move up and down, and cooperate with the syringe 73 and the first control valve 72 to facilitate dripping water after the air inside the measuring box 1 is exhausted, so as to avoid air flow taking away water and affecting the accuracy of the measurement, thereby solving the problem that the existing device is easy to evaporate and blow away water after dripping water, which not only affects the spreading of water but also affects the measurement results.

[0024] Embodiment 3:

[0025] like Figure 1 and Figure 2 As shown, an air inlet pipe 8 and an air outlet pipe 9 are fixedly connected to each other on both sides of the outer surface of the measuring box 1, and one end of the air inlet pipe 8 and the air outlet pipe 9 is fixedly connected to a second control valve 10 to facilitate ventilation in the measuring box 1.

[0026] Working principle: When in use, connect the atomic force microscope probe 6 to an external computer, then place the shale mineral on the shale mineral placement plate 3 and seal the top cover 2, then fill nitrogen into the interior of the measuring box 1 through the air inlet pipe 8 and the air outlet pipe 9, and after the air in the measuring box 1 is exhausted, close the second control valves 10 on both sides, and then start the electric push rod 75 to drive the dropper 71 to move downward, and then drip water onto the surface of the shale mineral through the syringe 73 and the first control valve 72. Adding water after the air is exhausted can prevent the air flow from carrying away the water and affecting the accuracy of the measurement, thereby solving the problem that the existing device is to add water and then exhaust the air, which is easy to evaporate and blow away the water, which not only affects the spreading of the water but also affects the measurement results.

[0027] After being fully moistened with water, the first motor 47 and the second motor 48 are started. The rotation of the first motor 47 and the second motor 48 can respectively drive the first screw rod 42 and the second screw rod 45 to rotate, and then drive the first slider 43 and the second slider 46 to move, thereby driving the atomic force microscope probe 6 to move to various positions in the horizontal direction, so as to facilitate scanning of various positions on the surface of the shale mineral and improve the accuracy of the measurement, thereby solving the problem that the probe of the existing device is installed on the loading device and is fixed in position and cannot scan various positions on the surface of the shale mineral.

[0028] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for measuring the wettability of a shale mineral surface, comprising a measuring box (1), characterized in that: The top of the measuring box (1) is sealed and fixedly connected to a top cover (2), a shale mineral placement plate (3) is placed on the inner bottom of the measuring box (1), a position adjustment mechanism (4) is fixedly installed on the lower surface of the top cover (2), a loading plate (5) is fixedly connected to the movable end of the position adjustment mechanism (4), an atomic force microscope probe (6) is fixedly installed on the lower surface of the loading plate (5), and a drip mechanism (7) is installed through the upper surface of the top cover (2); The position adjustment mechanism (4) comprises two support plates (41) symmetrically fixedly connected to the lower surface of the top cover (2); a first screw rod (42) is rotatably connected between the two support plates (41); the outer surface of the first screw rod (42) is threadedly connected to a first slider (43) slidably connected to the lower surface of the top cover (2); the bottom end of the first slider (43) is fixedly connected to a U-shaped frame (44); a second screw rod (45) is rotatably connected to the inside of the U-shaped frame (44); the outer surface of the second screw rod (45) is threadedly connected to a second slider (46) slidably connected to the inner wall of the U-shaped frame (44); and the loading plate (5) is fixedly mounted on the bottom end of the second slider (46).

2. A shale mineral surface wettability measuring device according to claim 1, characterized in that: The first screw rod (42) and the second screw rod (45) are arranged perpendicular to each other.

3. A shale mineral surface wettability measuring device according to claim 2, characterized in that: A first motor (47) is fixedly mounted on the outer surface of any one of the support plates (41), and an output shaft of the first motor (47) is fixedly connected to one end of a first screw rod (42). A second motor (48) is fixedly mounted on the outer surface of the U-shaped frame (44), and an output shaft of the second motor (48) is fixedly connected to one end of a second screw rod (45).

4. The device for measuring the surface wettability of shale minerals according to claim 1, characterized in that: The dripping mechanism (7) comprises a dripping tube (71) which penetrates and is sealingly and slidably connected to the center position of the upper surface of the top cover (2); the top end of the dripping tube (71) is fixedly connected to a first control valve (72); the other end of the first control valve (72) is fixedly connected to a syringe (73); and the outer surface of the dripping tube (71) is sealingly and slidably connected to a support tube (74) which is fixedly connected to the upper surface of the top cover (2).

5. A shale mineral surface wettability measuring device according to claim 4, characterized in that: An electric push rod (75) is fixedly mounted on the upper surface of the top cover (2), a top end of the electric push rod (75) is fixedly connected to a connecting plate (76), and one end of the connecting plate (76) is fixedly sleeved on the outer surface of the drip tube (71).

6. The device for measuring the surface wettability of shale minerals according to claim 1, characterized in that: An air inlet pipe (8) and an air outlet pipe (9) are fixedly connected to each other on both sides of the outer surface of the measuring box (1), and one end of the air inlet pipe (8) and the air outlet pipe (9) are fixedly connected to a second control valve (10).

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