Tester for oil-water saturation of tight oil-gas reservoir

Abstract

The utility model belongs to the technical field of saturation testing, and particularly relates to a tight oil and gas reservoir oil-water saturation tester which comprises a sample cylinder, the sample cylinder is in a cylindrical shape with an open top wall, and damping buffer rods are arranged on the periphery of the bottom of an inner cavity of the sample cylinder; the top ends of all the damping buffer rods are jointly provided with a storage barrel, the storage barrel is in a cylindrical shape with an open top wall and is located in an inner cavity of the sample barrel, strip-shaped holes are formed in the outer side wall and the bottom wall of the storage barrel, and the lower ends of the damping buffer rods are hinged to the bottom wall of the inner cavity of the sample barrel. According to the utility model, the object placing cylinder is arranged in the sample cylinder, and the damping buffer rod is arranged between the bottom of the object placing cylinder and the inner bottom of the sample cylinder in a surrounding manner, so that when sample rocks are put into the object placing cylinder, the object placing cylinder is buffered through the damping buffer rod, and the sample rocks can be properly protected and properly prevented from being broken; and the sample cylinder can be properly protected, so that the service life of the sample cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of saturation testing, in particular to an oil-water saturation testing instrument for tight oil and gas reservoirs. Background Art

[0002] Publication (Announcement) No. CN207261006U discloses a tight oil and gas reservoir oil-water saturation tester, which includes a sample barrel, a heating sleeve, a condenser tube, and a metering tube; the heating sleeve is placed on the sample barrel to heat the sample in the sample barrel; a sealing cover is provided at the upper end of the sample barrel, and the lower end of the sample barrel is connected to the condenser tube through a sealing groove, and a graphite sealing ring is provided in the sealing groove; the metering tube is placed in the condenser tube, and the upper end of the metering tube is connected to the sample barrel; the upper end of the condenser tube is provided with a condensed water outlet, and the lower end of the condenser tube is provided with a condensed water inlet. The utility model can accurately measure the oil-water saturation of tight oil and gas reservoirs.

[0003] Although the above-mentioned patent has many advantages, it requires the sample rock to be directly placed in the sample tube when in use. Since the sample rock is usually 150-200g, it is in direct rigid contact with the inner wall of the sample tube when placed, which can easily break the sample and make it inconvenient to remove it afterwards. It is also easy to cause damage to the inside of the sample tube, reducing its service life. Therefore, it is necessary to develop an oil-water saturation tester for tight oil and gas reservoirs. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0006] Tight oil and gas reservoir oil and water saturation tester, including:

[0007] A sample cylinder, the sample cylinder is in the shape of a cylinder with an open top wall, and a damping buffer rod is arranged around the bottom of the inner cavity of the sample cylinder;

[0008] A storage cylinder, a storage cylinder is commonly provided at the top end of all the damping buffer rods, the storage cylinder is cylindrical with an open top wall and is located in the inner cavity of the sample cylinder, the outer wall and the bottom wall of the storage cylinder are both provided with strip holes, the lower end of the damping buffer rod is hinged to the bottom wall of the inner cavity of the sample cylinder, and the upper end of the damping buffer rod is hinged to the bottom of the storage cylinder.

[0009] As a preferred solution of the tight oil and gas reservoir oil-water saturation tester described in the utility model, wherein: the inner cavity bottom wall of the sample tube is provided with an inclined surface, and the lower end of the damping buffer rod is hinged to the side wall of the inclined surface.

[0010] As a preferred solution of the oil-water saturation tester for tight oil and gas reservoirs described in the utility model, a plurality of damping buffer rods are arranged around the center of the bottom of the storage tube at equal intervals.

[0011] As a preferred solution of the tight oil and gas reservoir oil-water saturation tester described in the utility model, a through hole is opened at the center of the bottom end of the sample tube, and an annular sealing groove is protruding from the bottom of the sample tube below the through hole.

[0012] As a preferred solution of the tight oil and gas reservoir oil-water saturation tester described in the utility model, wherein: a sealing cover adapted to seal the sample tube is detachably mounted on the top of the sample tube, and anti-slip grooves are arranged on the outer side of the sealing cover.

[0013] As a preferred solution of the oil-water saturation tester for tight oil and gas reservoirs described in the utility model, the outer side wall of the sample tube is provided with an external thread, and the inner side wall of the sealing cover is provided with an internal thread adapted to engage with the external thread.

[0014] As a preferred solution of the oil-water saturation tester for tight oil and gas reservoirs described in the utility model, a sealing column is protruding from the inner top wall of the sealing cover, and the sealing column is interference fit with the inner side of the sample tube. A sealing ring is protruding from the upper edge of the sample tube, and the inner and outer diameters of the sealing ring and the sample tube are consistent.

[0015] Compared with the prior art, the utility model has the following beneficial effects: by arranging a storage cylinder inside the sample cylinder, and a damping buffer rod is arranged around the bottom of the storage cylinder and the inner bottom of the sample cylinder, when the sample rock is put into the storage cylinder, the storage cylinder is buffered by the damping buffer rod, which can properly protect the sample rock, properly avoid the sample rock from being broken, facilitate subsequent removal, and properly protect the sample cylinder to extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 For this utility model Figure 1 A schematic diagram of the structure of the internal components of the sample cylinder cross section;

[0019] Figure 3 For this utility model Figure 2 A schematic diagram of the structure of the sample cylinder in the upward direction;

[0020] Figure 4 It is a schematic diagram of the structure of the sealing cover of the utility model when viewed from above.

[0021] In the figure: a sample tube 100 , a damping buffer rod 110 , an inclined surface 120 , a through hole 130 , a sealing groove 140 , a sealing cover 150 , an external thread 160 , an internal thread 170 , a sealing column 180 , a sealing ring 190 , a storage tube 200 , and a strip hole 210 . DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0024] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] See also Figure 1-Figure 4 , which shows a schematic diagram of the structure of the embodiment of the utility model of the oil-water saturation tester for tight oil and gas reservoirs, please refer to Figure 1-Figure 4 , a detailed introduction is given to the oil and water saturation tester for tight oil and gas reservoirs.

[0027] The oil-water saturation tester for tight oil and gas reservoirs comprises a sample barrel 100, wherein the sample barrel 100 is in the shape of a cylinder with an open top wall, and a damping buffer rod 110 is arranged around the bottom of the inner cavity of the sample barrel 100;

[0028] The top of all the damping and buffering rods 110 is commonly provided with a storage barrel 200, which is cylindrical with an open top wall and is located in the inner cavity of the sample barrel 100. The outer wall and the bottom wall of the storage barrel 200 are both provided with strip holes 210. The lower end of the damping and buffering rod 110 is hinged to the bottom wall of the inner cavity of the sample barrel 100, and the upper end of the damping and buffering rod 110 is hinged to the bottom of the storage barrel 200. The storage barrel 200 can be made of metal material to enhance its strength.

[0029] It should be noted that the device also includes a heating jacket located outside the sample tube 100, a condenser connected to the sample tube 100 and a metering tube located inside the condenser, and other components arranged on the condenser and the metering tube. The contents recorded in the existing public announcement number CN207261006U, which discloses a tight oil and gas reservoir oil-water saturation tester, are referred to and will not be repeated here. In this embodiment, only the sample tube and the sealing cover in the existing public technology are improved.

[0030] Furthermore, the inner cavity bottom wall of the sample tube 100 is provided with an inclined surface 120 , and the lower end of the damping buffer rod 110 is hinged to the side wall of the inclined surface 120 , so that the liquid can flow into the condenser tube better along the inclined surface 120 .

[0031] Furthermore, the plurality of damping and buffering rods 110 are arranged around the center of the bottom of the storage barrel 200 at equal intervals. When the sample is put into the storage barrel 200, the plurality of damping and buffering rods 110 can buffer the storage barrel 200 more evenly.

[0032] Furthermore, a through hole 130 is opened at the center of the bottom end of the sample tube 100, and an annular sealing groove 140 is protruded from the bottom of the sample tube 100 below the through hole 130. The liquid flows into the condenser along the inclined surface 120 through the through hole 130. The sealing groove 140 and the inner side of the condenser are interference fit. The sealing groove 140 is made of rubber material and is sealed when the condenser is inserted through the sealing groove 140.

[0033] Furthermore, a sealing cover 150 adapted to seal the sample tube 100 is detachably mounted on the top of the sample tube 100 , and anti-slip grooves are arranged on the outer side of the sealing cover 150 , which facilitates the rotation of the sealing cover 150 .

[0034] Furthermore, the outer wall of the sample tube 100 is provided with an external thread 160 , and the inner wall of the sealing cover 150 is provided with an internal thread 170 adapted to engage with the external thread 160 , so that the sealing cover 150 and the sample tube 100 are screw-connected and installed, which is convenient for assembly and disassembly.

[0035] Furthermore, a sealing column 180 is protruding from the inner top wall of the sealing cover 150, and the sealing column 180 is interference fit with the inner side of the sample tube 100. A sealing ring 190 is protruding from the upper edge of the sample tube 100. The inner and outer diameters of the sealing ring 190 and the sample tube 100 are consistent. The sealing column 180 and the sealing ring 190 are made of rubber material. The sealing column 180 and the sealing ring 190 make the sample tube 100 and the sealing cover 150 more sealed after installation.

[0036] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. Tight oil and gas reservoir oil and water saturation tester, characterized in that: include: A sample cylinder (100), the sample cylinder (100) is in the shape of a cylinder with an open top wall, and damping buffer rods (110) are arranged around the bottom of the inner cavity of the sample cylinder (100); A storage barrel (200), the top ends of all the damping and buffering rods (110) are commonly provided with a storage barrel (200), the storage barrel (200) is cylindrical with an open top wall and is located in the inner cavity of the sample barrel (100), the outer wall and the bottom wall of the storage barrel (200) are both provided with strip holes (210), the lower end of the damping and buffering rod (110) is hingedly arranged with the bottom wall of the inner cavity of the sample barrel (100), and the upper end of the damping and buffering rod (110) is hingedly arranged with the bottom of the storage barrel (200).

2. The oil-water saturation tester for tight oil and gas reservoirs according to claim 1, characterized in that: The inner cavity bottom wall of the sample cylinder (100) is provided with an inclined surface (120), and the lower end of the damping buffer rod (110) is hinged to the side wall of the inclined surface (120).

3. The oil-water saturation tester for tight oil and gas reservoirs according to claim 1, characterized in that: The plurality of damping buffer rods (110) are arranged around the center of the bottom of the storage tube (200) at equal intervals.

4. The oil-water saturation tester for tight oil and gas reservoirs according to claim 1, characterized in that: A through hole (130) is opened at the center of the bottom end of the sample cylinder (100), and an annular sealing groove (140) is protruding from the bottom of the sample cylinder (100) below the through hole (130).

5. The oil-water saturation tester for tight oil and gas reservoirs according to claim 1, characterized in that: A sealing cover (150) adapted to seal the sample cylinder (100) is detachably mounted on the top end of the sample cylinder (100), and anti-slip grooves are arranged on the outer side of the sealing cover (150).

6. The oil-water saturation tester for tight oil and gas reservoirs according to claim 5, characterized in that: The outer wall of the sample cylinder (100) is provided with an external thread (160), and the inner wall of the sealing cover (150) is provided with an internal thread (170) adapted to engage with the external thread (160).

7. The oil-water saturation tester for tight oil and gas reservoirs according to claim 6, characterized in that: A sealing column (180) is protruding from the inner top wall of the sealing cover (150), and the sealing column (180) is interference fit with the inner side of the sample tube (100). A sealing ring (190) is protruding from the upper edge of the sample tube (100), and the inner and outer diameters of the sealing ring (190) and the sample tube (100) are consistent.

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