CN214894689U - Rock contact angle testing device considering water saturation and adsorbed gas - Google Patents
Rock contact angle testing device considering water saturation and adsorbed gas Download PDFInfo
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- CN214894689U CN214894689U CN202120604651.7U CN202120604651U CN214894689U CN 214894689 U CN214894689 U CN 214894689U CN 202120604651 U CN202120604651 U CN 202120604651U CN 214894689 U CN214894689 U CN 214894689U
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Abstract
The utility model discloses a consider rock contact angle testing arrangement of water saturation and adsorbed gas belongs to the experimental testing arrangement in the aspect of the rock core analysis among the oil and gas exploration and development process. The device comprises an air supply system, a main body chamber, a photographic lighting system, an injection pump and an information acquisition control system. The main body sealing chamber comprises an internal thread steel sealing cover, an external thread steel sealing sleeve, a groove thread base and a balance bracket; the photographic light system comprises a light source and a high-speed focusing camera; the injection pump and the information acquisition system comprise a computer, a pressure sensor, a high-pressure constant-flow pump, a high-pressure capillary tube and an external water source, wherein the high-pressure capillary tube is connected with a threaded steel sealing sleeve by welding through a stainless steel tube. The utility model discloses operation technology is convenient, can solve the problem of testing rock contact angle under the true condition effectively, and liquid phase distribution action and optimization working solution have important meaning in the tight rock reservoir stratum of follow-up research.
Description
Technical Field
The utility model belongs to the experimental apparatus in the aspect of rock core analysis among the oil and gas exploration and development process, concretely relates to consider rock contact angle testing arrangement of water saturation and adsorbed gas.
Background
The contact angle test is the basis for studying the existence of the liquid phase of the dense rock. At present, a method for detecting a core contact angle of an oil and gas reservoir is based on a SY/T5153 plus 2007 oil reservoir rock wettability determination method, the mechanism of a contact angle method is mainly that a three-phase interface in a water-oil-solid system is in balance relation of surface energy, the balance relation accords with a Young-Laplace equation, the method can only evaluate the core contact angle in a non-adsorbed gas state, and a contact angle test instrument usually considers the influence of temperature and pressure, for example, in the patent number of a test device for testing the contact angle and the interface tension under ultrahigh pressure and high temperature in the existing patent database: 201320792134.2A method for measuring CO2Experimental apparatus for contact angle of salt water/rock system patent No. 201510992562.3, apparatus for testing high temperature contact angle of high temperature solid material patent no: 201822124457.X, a contact angle testing device, patent No.: 201921228095.7, a testing device and method for testing 3D contact angle value of solid material by top view method, patent number: 201910178457.4 patent No. < A testing device for interfacial tension and contact angle of fluid in high-temperature and ultra-high pressure oil-gas reservoir >: 202010764558.2, etc. And the existing contact angle patent test considers static contact angles or dynamic contact angles, for example, the patent number of a portable contact angle testing device adopting a real liquid drop method is as follows: 201120310388.7, an apparatus for measuring intrinsic contact angle, patent No.: 201310645945.4, patent No.: 201480043521.3, method for testing static contact angle and dynamic change of wettability of rock surface, patent No.: 201611203555.1, etc.
As for the current core contact angle test, the initial water saturation and adsorbed gas containing conditions of the compact rock are not considered in the current test means, so that the compact rock wettability test is lack of authenticity and accuracy. Water saturation directly affects rock wettability, and adsorbed gas in dense rock can cause a decrease in the solid-liquid interfacial energy, resulting in an increase in contact angle. Therefore, the rock contact angle testing device considering the water saturation and the adsorbed gas is designed, the tight rock liquid-solid contact angle can be truly and accurately represented, and a foundation is provided for the follow-up development of the tight rock liquid phase distribution behavior research.
Disclosure of Invention
The utility model provides a technical problem provide a rock contact angle testing arrangement who considers water saturation and adsorbed gas.
The utility model provides a technical scheme that its technical problem adopted is: the device for calculating the volume of gas adsorbed by the rock core by utilizing the Boyle's law and testing the contact angle enables the rock contact angle test to be more authentic.
Further, the method comprises the following steps: the rock contact angle testing device considering water saturation and adsorbed gas comprises a gas supply system, a main body chamber, a photographic lighting system, an injection pump and an information acquisition control system; wherein the gas supply system comprises a gas source bottle (1) and a standard tank (11); the main body sealing chamber comprises an internal thread steel sealing cover (6), an external thread steel sealing sleeve (15), a groove thread base (13) and a balance support (18); the photographic light system comprises a light source (17) and a high-speed focusing camera (14); the injection pump and the information acquisition system comprise a computer (16), a pressure sensor (4), a high-pressure constant flow pump (10), a high-pressure capillary tube (7) and an external water source (9), wherein the high-pressure capillary tube (7) is connected with an internal thread steel sealing cover (6) through stainless steel pipe welding.
Further, the method comprises the following steps: the balance support (18) consists of 6B-grade hexagon head bolts and is used for adjusting the level of the whole device.
Further, the method comprises the following steps: the groove thread base (13) is provided with four cylindrical bayonets (21) with the inner diameter of 15mm and the depth of 20mm, and is used for connecting the groove thread base (13) with the internal thread steel sealing cover (6) by means of rotation of an external iron rod.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the pore volume measurement, the adsorbed gas volume measurement, the water saturation establishment and the like are realized on the same device, and the instrument error caused by the change of the test condition is reduced;
(2) consider a tight rock contact angle test at a certain water saturation. The water saturation in situ condition can directly affect the contact angle test under the gas-liquid-solid three-phase condition, even change the core wettability;
(3) consider the tight rock contact angle test under adsorbed gas conditions. The adsorption gas existing in the compact rock, especially the compact shale and the coal rock under the in-situ condition can reduce the interfacial energy between solid and liquid and cause the contact angle to increase, and the device can avoid the influence of the factors.
Drawings
FIG. 1 is a diagram of an experimental apparatus of the present invention;
in the figure: 1. the system comprises an air source, 2, 3, 5 and 20 valves, 4 pressure sensors, 6 internal thread steel sealing covers, 7 high-pressure capillary tubes, 8 one-way valves, 9 external liquid phase, 10 high-pressure constant flow pumps, 11 standard tanks, 12 rock cores, 13 groove thread bases, 14 high-definition focusing cameras, 15 external thread steel sealing sleeves, 16 information acquisition systems, 17 light sources, 18 balance supports, 19 vacuum pumps and 21 cylindrical bayonets.
Detailed Description
The utility model consists of an air supply system, a main body cavity, a photographic light system, an injection pump and an information acquisition control system; wherein the gas supply system comprises a gas source bottle (1) and a standard tank (11) which are connected through a steel hollow pipeline; the main body cavity comprises an internal thread steel sealing cover (6), an external thread steel sealing sleeve (15), a groove thread base (13) and a balance support (18), and the internal thread steel sealing cover and the external thread steel sealing sleeve are connected through threads; the photographic light system comprises a light source (17) and a high-speed focusing camera (14); the injection pump and information acquisition system comprises a high-pressure capillary tube (7) and an external water source (9), wherein the pressure sensor (4) and the high-pressure constant-flow pump (10) are connected with and controlled by a computer (16) through data lines, and the high-pressure capillary tube (7) is connected with a threaded steel sealing cover (6) through stainless steel pipes in a welding manner; wherein the balance bracket (18) is made of six B-grade hexagon head bolts and is used for adjusting the level of the platform; the groove thread base (13) is provided with four cylindrical bayonets (21) with the inner diameter of 15mm and the depth of 20mm, and is used for connecting the groove thread base (13) with the internal thread steel sealing cover (6) by means of external iron rod rotation.
The above embodiments have been described in detail with reference to specific parameters and examples, but the present invention is not limited to the above embodiments, and the experimental conditions and objects can be flexibly changed without departing from the scope of the present invention, which falls within the protection scope of the present invention.
Claims (3)
1. A rock contact angle testing device considering water saturation and adsorbed gas is characterized in that: the device comprises an air supply system, a main body chamber, a photographic light system, an injection pump and an information acquisition control system; wherein the gas supply system comprises a gas source bottle (1) and a standard tank (11); the main body sealing chamber comprises an internal thread steel sealing cover (6), an external thread steel sealing sleeve (15), a groove thread base (13) and a balance support (18); the photographic light system comprises a light source (17) and a high-speed focusing camera (14); the injection pump and the information acquisition system comprise a computer (16), a pressure sensor (4), a high-pressure constant flow pump (10), a high-pressure capillary tube (7) and an external water source (9), wherein the high-pressure capillary tube (7) is connected with an internal thread steel sealing cover (6) through stainless steel pipe welding.
2. The apparatus of claim 1, wherein the apparatus is characterized by: the balance bracket (18) consists of 6B-grade hexagon head bolts and is used for adjusting the level of the whole device.
3. The apparatus of claim 1, wherein the apparatus is characterized by: the groove thread base (13) is provided with four cylindrical bayonets (21) with the inner diameter of 15mm and the depth of 20mm, and is used for connecting the groove thread base (13) with the internal thread steel sealing cover (6) by means of external iron rod rotation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120604651.7U CN214894689U (en) | 2021-03-25 | 2021-03-25 | Rock contact angle testing device considering water saturation and adsorbed gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120604651.7U CN214894689U (en) | 2021-03-25 | 2021-03-25 | Rock contact angle testing device considering water saturation and adsorbed gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964604A (en) * | 2021-03-25 | 2021-06-15 | 西南石油大学 | Rock contact angle testing device and method considering water saturation and adsorbed gas |
| CN114383978A (en) * | 2021-12-30 | 2022-04-22 | 安徽理工大学 | CO2Testing device and method for coal-rock component contact angle of water-coal system |
-
2021
- 2021-03-25 CN CN202120604651.7U patent/CN214894689U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112964604A (en) * | 2021-03-25 | 2021-06-15 | 西南石油大学 | Rock contact angle testing device and method considering water saturation and adsorbed gas |
| CN114383978A (en) * | 2021-12-30 | 2022-04-22 | 安徽理工大学 | CO2Testing device and method for coal-rock component contact angle of water-coal system |
| CN114383978B (en) * | 2021-12-30 | 2024-01-26 | 安徽理工大学 | CO 2 Device and method for testing contact angle of coal-rock component of water-coal system |
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