CN212932290U

CN212932290U - Shale gas content continuous measurement device

Info

Publication number: CN212932290U
Application number: CN202021837164.7U
Authority: CN
Inventors: 王涛; 宜伟
Original assignee: Wuhan Paleozoic Testing Technology Co ltd
Current assignee: Wuhan Paleozoic Testing Technology Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-04-09
Anticipated expiration: 2030-08-27

Abstract

The utility model discloses a shale gas content continuous measurement device, including U type pipe, distancer, its characterized in that, the U type pipe is held to have liquid, and this U type pipe one end is equipped with the joint pipe by the end cap shutoff on the end cap, gas conveying pipe's one end with the intercommunication can be dismantled to the joint pipe, the distancer includes the radar level gauge and installs the position of installing arbitrary one end in the U type pipe to the intraductal liquid surface of U type and measure, distancer and host computer signal connection. The gas output by the gas conveying pipe enters the U-shaped pipe, liquid is discharged, the height of the liquid level is changed, the position of the liquid level can be measured in real time by the range finder and displayed on the upper computer to form a liquid level position time sequence curve, the liquid level position time sequence curve is the real-time volume of shale gas generated by desorption, and the measuring result is accurate.

Description

Shale gas content continuous measurement device

Technical Field

Relate to the gas volume detection field, especially relate to a testing arrangement who is used for testing shale gas content in the shale gas exploration and development technical field.

Background

Shale gas is natural gas that is present in shale or coal seams in an adsorbed, free, or dissolved state. In a conventional natural gas reservoir, generally, free gas and dissolved gas are mainly used, and basically, adsorbed gas is not contained, while in an unconventional natural gas reservoir such as shale, the content of adsorbed gas is high, and the total amount of adsorbed gas and free gas is generally more than 90%. The development prospect of shale gas is directly related to the content of adsorbed gas and free gas, and accurate gas content evaluation data must be established for effectively evaluating whether the shale gas in a certain area has a commercialization prospect, and the gas content data is used for gas reservoir simulation and production prediction. For this purpose, the gas content and desorption properties of the shale core must be known. Therefore, the shale gas content testing equipment is particularly important in shale gas exploration and development.

At present, several devices and methods for testing the gas content of shale gas have been developed at home and abroad. The "direct method" proposed by the U.S. mining agency (USBM) is considered an industry standard for determining the gas content of coal seams. The principle of the method is that gas accumulated in a desorption tank is periodically discharged into a glass measuring cylinder by using a gas pressure method, and the volume of the discharged water is periodically observed under the conditions of atmospheric pressure and temperature, so that the volume of the desorption gas is determined. The method is also applied to the gas content test of the shale gas. Because the desorption time of the shale is very long, the shale generally needs several days or even weeks, and experimental data needs to be recorded every several hours, so that the workload of a real object is very large, meanwhile, the minimum scale on the measuring cylinder is 1nm, the precision is not high, and the experimental error is greatly increased by manually reading the reading on the measuring cylinder.

The other equipment for testing the gas content of the shale gas is an existing fast desorption instrument for the gas content of the coal bed, can be used for testing the gas content of the shale gas, and is mainly used for directly crushing a large sample to enable the gas to be fast desorbed, and measuring the volume of the desorbed gas by using a drainage method. However, the method can only obtain the total gas content of the shale, and cannot simulate the desorption process of the shale; in addition, because the gas desorbed from the shale is measured by adopting a drainage method, when the gas is converted into the liquid volume, a small part of the gas may be dissolved in the liquid, so that the finally measured gas volume and the actual gas volume data desorbed from the shale have deviation, and the experiment is inaccurate.

Therefore, the research and development of a gas content testing device which has high automation degree and can accurately and quickly obtain the desorption process and gas content data of the shale are urgently needed to overcome the defects.

The utility model aims at providing a shale gas air content testing arrangement, it can accomplish shale gas air content test work automatically, and the experimental result is more accurate.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the present gas volume measuring device precision that aims at solving is low, technical problem that can not quick continuous measurement.

The utility model discloses the technical scheme who takes: the utility model provides a shale gas content continuous measurement device, includes U type pipe, distancer, the U type intraductal liquid of holding, this U type pipe one end is by the end cap shutoff, is equipped with the joint pipe on the end cap, the one end of gas conveying pipe with the intercommunication can be dismantled to the joint pipe, the distancer includes the radar level gauge and installs and measure the position on the liquid surface in the U type pipe in arbitrary one end of U type pipe, distancer and host computer signal connection.

Further, the radar liquid level meter is installed at the open end of the U-shaped pipe, or the inner side of the closed end of the U-shaped pipe, or the outer side of the closed end of the U-shaped pipe, when the radar liquid level meter is located at the outer side of the closed end of the U-shaped pipe, a guide pipe communicated with the inside of the U-shaped pipe is arranged on the plug of the closed end, a guide wave pipe of the radar liquid level meter extends into the U-shaped pipe from the inside of the guide pipe, and the radar.

Further, the distancer still includes laser range finder, the U type intraductal reflection plate that floats at liquid surface cooperation laser range finder is equipped with, and laser range finder installs in the open end of U type pipe, or the blind end inboard of U type pipe, or the blind end outside of U type pipe, and when being located the blind end outside of U type pipe, the end cap of blind end adopts transparent glass stopper, or opaque material, when adopting opaque material, is equipped with the pipe on this end cap, and laser range finder's transmitting end stretches into in the U type pipe from the pipe, and laser range finder is connected with the pipe seal.

Further, the other end of the gas delivery pipe is also sequentially communicated with a drying device and a desorption tank, and the drying device and the desorption tank are communicated through a CPC quick coupling.

The utility model has the advantages that: the gas in the desorption tank enters the U-shaped pipe, liquid is discharged, the height of the liquid level is changed, the distance meter can measure the position of the liquid level in real time and display the position on the upper computer to form a liquid level position time sequence curve, the liquid level position time sequence curve is the real-time volume of shale gas generated by desorption, and the measurement result is accurate.

Drawings

Fig. 1a is a schematic connection diagram of a first continuous shale gas content measuring device according to embodiment 1 of the present invention;

fig. 1b is a schematic connection diagram of a second continuous shale gas content measuring device according to embodiment 1 of the present invention;

fig. 1c is a schematic connection diagram of a third continuous measuring device for shale gas content according to embodiment 1 of the present invention;

fig. 2 is a schematic connection diagram of a continuous shale gas content measuring device according to embodiment 2 of the present invention;

fig. 3a is a schematic connection diagram of a third continuous measuring device for shale gas content in embodiment 2 of the present invention;

fig. 3b is a schematic connection diagram of a fourth continuous shale gas content measuring device according to embodiment 2 of the present invention.

The method comprises the following steps: 1. the device comprises a desorption tank, 2. an air outlet, 3. a hose line, 4. a CPC

quick connector

1, 5. a drying pipe, 6. a connector pipe, 7. a guide pipe, 8. a distance meter, 9. a waveguide pipe, 10. an open end, 11. a U-shaped pipe, 12. a data line, 13. an upper computer, 14, a plug, 15 and a reflecting plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in FIG. 1a, the shale gas content continuous measurement device comprises a U-shaped pipe 11 and a distance meter 8, wherein liquid is contained in the U-shaped pipe 11, one end of the U-shaped pipe 11 is blocked by a plug 14, a joint pipe 6 is arranged on the plug 13, one end of a gas conveying pipe 3 is detachably communicated with the joint pipe 6, the distance meter 8 comprises a radar liquid level meter and is arranged at any one end of the U-shaped pipe to measure the position of the liquid surface in the U-shaped pipe, and the distance meter 8 is in signal connection with an upper computer 13. The radar level gauge is located the blind end inboard of U type pipe, and gas delivery pipe 3's the other end still communicates drying device 5, desorption jar 1 in proper order, and drying device 5 and desorption jar 1 communicate through CPC quick-operation joint 4.

Referring to fig. 1b, the continuous shale gas content measuring device comprises a U-shaped pipe 11, a distance meter 8, a plug 14, a joint pipe 6, an upper computer 13, a drying device 5, a desorption tank 1, a gas conveying pipe 3 and a CPC quick joint 4. The radar level gauge is located at the open end 10 of the U-tube.

Referring to fig. 1c, the continuous shale gas content measuring device comprises a U-shaped pipe 11, a distance meter 8, a plug 14, a joint pipe 6, an upper computer 13, a drying device 5, a desorption tank 1, a gas conveying pipe 3 and a CPC quick joint 4. The radar liquid level meter 8 is located the blind end outside of U type pipe 11, is equipped with the pipe 7 in the intercommunication U type pipe 11 on the end cap 14 of blind end, and in the wave guide 9 of radar liquid level meter 8 stretched into U type pipe 11 from the pipe 7, radar liquid level meter 8 and pipe 7 sealed connection.

Example 2

As shown in fig. 2, the shale gas content continuous measurement device comprises a U-shaped pipe 11 and a distance meter 8, wherein liquid is contained in the U-shaped pipe 11, one end of the U-shaped pipe 11 is blocked by a plug 14, a joint pipe 6 is arranged on the plug 13, one end of a gas conveying pipe 3 is detachably communicated with the joint pipe 6, the distance meter 8 comprises a laser distance meter and is arranged at any one end of the U-shaped pipe to measure the position of the liquid surface in the U-shaped pipe, and the distance meter 8 is in signal connection with an upper computer 13. The laser range finder is located the open end of U type pipe, and drying device 5, desorption jar 1 are still communicate in proper order to the other end of gas delivery pipe 3, and drying device 5 and desorption jar 1 communicate through CPC quick-operation joint 4. A reflecting plate 15 which floats on the liquid surface and is matched with a laser range finder is arranged in the U-shaped pipe 11.

Referring to fig. 3a, the continuous shale gas content measuring device comprises a U-shaped pipe 11, a distance meter 8, a plug 14, a joint pipe 6, an upper computer 13, a drying device 5, a desorption tank 1, a gas delivery pipe 3 and a CPC quick joint 4. The laser range finder 8 is positioned at the inner side of the closed end 10 of the U-shaped pipe 11, and a reflecting plate 15 which floats on the liquid surface and is matched with the laser range finder is arranged in the U-shaped pipe 11.

Referring to fig. 3b, the continuous shale gas content measuring device comprises a U-shaped pipe 11, a distance meter 8, a plug 14, a joint pipe 6, an upper computer 13, a drying device 5, a desorption tank 1, a gas delivery pipe 3 and a CPC quick joint 4. The laser range finder 8 is located the blind end outside of U type pipe 11, is equipped with in the U type pipe 11 to float in the reflecting plate 15 of liquid surface cooperation laser range finder, is equipped with the pipe 7 in the intercommunication U type pipe 11 on the end cap 14 of blind end, and in the U type pipe 11 was stretched into from pipe 7 to the transmitting end of laser range finder 8, laser range finder 8 and pipe 7 sealed connection.

(1) The utility model can continuously measure the gas volume and transmit the measured data to the computer for automatic recording, thereby greatly improving the automation degree and the working efficiency;

(2) the utility model is provided with a drying tube 5 which can remove the water vapor in the desorption gas;

(3) the utility model adopts the high-precision distance measuring instrument to measure, can accurately detect the position of the liquid level, and has higher measuring precision;

(4) the utility model is simple in operation, and degree of automation is higher.

Claims

1. The utility model provides a shale gas content continuous measurement device, includes U type pipe, distancer, its characterized in that, the U type intraductal liquid of holding, this U type pipe one end is by the end cap shutoff, is equipped with the joint pipe on the end cap, the one end of gas conveying pipe with the intercommunication can be dismantled to the joint pipe, the distancer includes the radar level gauge and installs and measure the position of the liquid surface in the U type pipe in arbitrary one end of U type pipe, distancer and host computer signal connection.

2. The continuous shale gas content measuring device of claim 1, wherein the radar liquid level gauge is installed at an open end of the U-shaped pipe, or inside a closed end of the U-shaped pipe, or outside a closed end of the U-shaped pipe, when the radar liquid level gauge is located outside the closed end of the U-shaped pipe, a guide pipe communicated with the inside of the U-shaped pipe is arranged on a plug of the closed end, a waveguide pipe of the radar liquid level gauge extends into the U-shaped pipe from the inside of the guide pipe, and the radar liquid level gauge is connected with the guide pipe in a sealing mode.

3. The shale gas content continuous measurement device according to claim 1, wherein the range finder further comprises a laser range finder, a reflection plate which floats on the liquid surface and matches with the laser range finder is arranged in the U-shaped pipe, the laser range finder is installed at the open end of the U-shaped pipe, or the inner side of the closed end of the U-shaped pipe, or the outer side of the closed end of the U-shaped pipe, when the laser range finder is located at the outer side of the closed end of the U-shaped pipe, a transparent glass plug or an opaque material is adopted as a plug of the closed end, when the opaque material is adopted, a guide pipe is arranged on the plug, the emission end of the laser range finder extends into the U-shaped pipe from the guide pipe, and the.

4. The continuous shale gas content measuring device according to any one of claims 1-3, wherein the other end of the gas conveying pipe is further communicated with a drying device and a desorption tank in sequence, and the drying device and the desorption tank are communicated through a CPC quick coupling.