A device for measuring oil and gas content in oil shale and an operating method thereof

Abstract

The present invention discloses a device for determining oil and gas content in oil shale and an operation method thereof, which belongs to the technical field of oil and gas exploration, and includes a heating sealing pressure mechanism for accommodating and heating oil shale samples, the mechanism including: a shell provided with an opening, the open end of the shell being detachably mounted with a sealing cover; a placement basket suspended in the shell, for storing oil shale samples, the placement basket being provided with an open end, and the open end being detachably mounted with a cover body; a rotating shaft having one end passing through the shell and being rotationally sealedly connected to the shell, the end of the rotating shaft located in the shell being fixedly connected to the placement basket; a rotating drive structure connected to the end of the rotating shaft located outside the shell, for driving the rotating shaft to rotate; a heating rod located in the shell, for heating the oil shale sample. The present invention is not only simple and convenient to operate, but also capable of flipping the sample, so that the sample can be heated evenly, the oil and gas release channel can be continuously adjusted, and the oil and gas release efficiency and measurement accuracy can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas exploration, and in particular relates to an oil and gas content determination technology, and specifically relates to an oil shale oil and gas content determination device and an operation method thereof. Background Art

[0002] The oil and gas content in oil shale is an important indicator for evaluating its development and utilization value. However, due to the complex oil and gas composition of oil shale and the content being affected by many factors, it is necessary to use professional measuring equipment to accurately measure it.

[0003] The existing measuring device directly loads the oil shale sample into the heating sealing pressure mechanism during use. The sample is fixed during the heating process, which may cause uneven heating and excessively high or low temperatures in some areas, affecting the efficiency of oil and gas release and the accuracy of measurement. Summary of the invention

[0004] In order to solve at least one of the above technical problems, the present invention provides an oil shale oil and gas content determination device and an operation method thereof. In the oil shale oil and gas content determination device of the present invention, the oil shale sample is placed in a placement basket. During the heating process, the placement basket is continuously reversed, which is conducive to uniform heating of various parts of the sample. At the same time, the crushed sample is also conducive to oil and gas release during the continuous flipping process. This can improve the measurement accuracy.

[0005] In order to achieve the above object, the solution provided by the present invention is as follows:

[0006] An oil shale oil and gas content measuring device, comprising:

[0007] The heating, sealing and pressure mechanism is used to contain and heat the oil shale sample, and the heating, sealing and pressure mechanism comprises:

[0008] A shell having an opening, wherein a sealing cover is detachably mounted on the open end of the shell for sealing the opening of the shell;

[0009] A placement basket suspended in the shell is used to store the oil shale sample, the placement basket is provided with an open end, and the open end is detachably mounted with a cover body;

[0010] A rotating shaft with one end passing through the shell and being rotatably sealed with the shell, and one end of the rotating shaft located inside the shell being fixedly connected with the placement basket;

[0011] A rotation driving structure connected to one end of the rotating shaft outside the housing and used to drive the rotating shaft to rotate;

[0012] A heating rod located in the housing is used to heat the oil shale sample;

[0013] A flow guide pipe arranged on the side wall of the shell;

[0014] The oil and gas collecting mechanism connected with the heating sealing pressure mechanism through the guide pipe is used for collecting the oil and gas coming out of the heating sealing pressure mechanism.

[0015] The oil and gas extraction mechanism connected to the heating sealing pressure mechanism is used to extract oil and gas from the oil shale sample.

[0016] As a specific embodiment of the present invention, there are two rotating shafts, which are coaxially arranged and respectively pass through two opposite side walls of the shell; the rotating drive structure includes a dual-axis motor fixed to the outer wall of the shell, and the two output ends of the dual-axis motor are symmetrically arranged and respectively fixedly connected to a rotating rod; each rotating shaft corresponds to a rotating rod, the rotating rod is parallel to the rotating shaft, and the rotating rod is connected to the corresponding rotating shaft via a synchronous belt transmission.

[0017] As a specific embodiment of the present invention, it also includes an impeller located in the housing, the impeller is coaxially fixed on the rotating shaft, and is used to drive the fluid in the housing to flow.

[0018] As a specific implementation of the present invention, a filter plate is provided at one end of the flow guide tube located inside the shell.

[0019] Furthermore, the filter plate is detachably fixed to the flow guide pipe.

[0020] Furthermore, a positioning groove is provided on the side wall of the flow guide pipe, a second magnetic block is provided inside the positioning groove, and a first magnetic block is provided on the side wall of the filter plate; the first magnetic block is magnetically connected to the second magnetic block.

[0021] As a specific embodiment of the present invention, it also includes detachable thermal insulation cotton located outside the shell.

[0022] Furthermore, a guide rail is provided on the side wall of the shell, and the side wall of the guide rail is slidably connected to multiple groups of mounting rods. The thermal insulation cotton is a sheet-like foldable structure, and the thermal insulation cotton is fixed to the mounting rod via a connecting frame, so that when the mounting rod moves along the guide rail, the shell area covered by the thermal insulation cotton changes.

[0023] Furthermore, two connecting belts are symmetrically arranged at both ends of the thermal insulation cotton, the side walls of the connecting belts are provided with buckles, and the side walls of the shell are symmetrically provided with multiple groups of slots, and the connection method between the slots and the buckles is snap connection.

[0024] An operating method of an oil shale oil and gas content measuring device, used for operating the above-mentioned oil shale oil and gas content measuring device, the method comprising the following steps:

[0025] S1. Preparation stage: ensure that all parts of the device are in good condition;

[0026] S2. Sample preparation: The shale oil samples stored in ultra-low temperature are frozen and crushed with liquid nitrogen, a certain amount of the samples are weighed, and the oil shale samples are placed in the placement basket of the heating and sealing pressure mechanism, and the formation pressure is applied;

[0027] S3. Oil and gas generation and collection:

[0028] S31, heating the oil shale sample to release oil and gas, and collecting and measuring the oil and gas through an oil and gas collecting mechanism;

[0029] S32, adding an extractant into the heating sealing pressure mechanism through the oil and gas extraction mechanism to extract oil and gas from the oil shale sample, and collecting and measuring the extracted oil and gas through the oil and gas collection mechanism;

[0030] S4. Result measurement and evaluation: Evaluate the oil-bearing structure in the oil shale based on the measurement results.

[0031] Compared with the prior art, at least one specific implementation of the present invention has the following advantages:

[0032] The invention is not only simple and convenient to operate, but also can rotate the sample, so that the sample can be heated evenly, thereby improving the oil and gas release speed and measurement accuracy.

[0033] The present invention adopts a special layout of rotating parts to drive the placement basket to rotate, which can reduce the diameter of the rotating shaft, thereby reducing the temperature of the rotating shaft at one end outside the shell, avoiding damage to the synchronous belt.

[0034] The present invention is provided with a detachable heat-insulating cotton structure, which can keep the inside of the measuring device body warm when the sample is heated, thereby reducing heat loss during heating and reducing waste of resources. It can be disassembled in the later cooling process to accelerate the cooling of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a stereogram of a specific embodiment of the present invention;

[0036] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle thermal insulation cotton;

[0037] Figure 3 yes Figure 2 A partial enlarged view of the middle part;

[0038] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle sealing strip;

[0039] Figure 5 yes Figure 1 A stereogram from another perspective;

[0040] Figure 6 is a flow chart of the method of the present invention;

[0041] In the figure: housing 1; dual-axis motor 11; rotating rod 12; synchronous belt 13; rotating shaft 14; placing basket 15; cover body 16; heating rod 17; guide rail 2; mounting rod 21; connecting frame 22; thermal insulation cotton 23; guide tube 3; positioning groove 31; filter plate 32; first magnetic block 33; second magnetic block 34; connecting belt 4; buckle 41; slot 42; impeller 5; sealing cover 6; sealing strip 61. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0043] The oil shale oil and gas content determination device of the present invention comprises a heating and sealing pressure mechanism, an oil and gas extraction mechanism and an oil and gas collection mechanism, wherein the heating and sealing pressure mechanism is used to accommodate the oil shale sample and heat it so that the oil and gas in the oil shale sample are released; the oil and gas collection mechanism is connected to the outlet of the heating and sealing pressure mechanism, and is used to collect the oil and gas coming out of the heating and sealing pressure mechanism, and analyze and measure them; the oil and gas extraction mechanism is connected to the inlet of the heating and sealing pressure mechanism, and is used to extract the oil and gas in the oil shale sample. In the present invention, the oil and gas extraction mechanism and the oil and gas collection mechanism are both conventional structures. For example, the oil shale oil content test experimental device and its test method disclosed in CN201410054940.9 disclose a specific structure. The above two mechanisms are not the focus of the present invention. Other similar mechanisms in the prior art can also be applied to the present invention, and the specific structure will not be described in detail here. The improvement of the present invention mainly lies in the heating and sealing pressure mechanism, which will be explained in conjunction with the accompanying drawings below.

[0044] The heating sealing pressure mechanism of the present invention comprises a shell 1, a rotating shaft 14, a heating rod 17, a placing basket 15 and a rotating driving structure. The shell 1 is provided with an open end, which is convenient for taking and placing the oil shale sample into the shell 1. The open end is detachably mounted with a sealing cover 6 for sealing the opening of the shell 1 during the heating process. In order to enhance the sealing effect, in some embodiments, a sealing strip 61 is provided on the sealing cover 6 to seal the gap between the shell 1 and the sealing cover 6 to prevent leakage of the fluid in the shell 1. The placing basket 15 is suspended in the shell 1 for storing the oil shale sample. The placing basket 15 is also provided with an open end, and the open end is also detachably mounted with a cover 16, which is convenient for taking and placing the oil shale sample into the placing basket 15. The rotating shaft 14 is arranged horizontally, one end of which passes through the shell 1 and is rotatably sealed with the shell 1. The end of the rotating shaft 14 located inside the shell 1 is fixedly connected to the placement basket 15, and the end located outside the shell 1 is transmission-connected to the rotary drive structure, so that the rotating shaft 14 can be driven by the rotary drive structure to rotate, thereby driving the placement basket 15 to rotate, so that the oil shale sample in the placement basket 15 is turned upside down. The heating rod 17 is located inside the shell 1, and is used to heat the oil shale sample to release the oil and gas inside it. The side wall of the shell 1 is provided with a guide pipe 3, which is used to send the fluid in the shell 1 to the oil and gas collection mechanism.

[0045] In the process of heating the oil shale of the present invention, the placement basket 15 rotates with the rotating shaft 14, and the oil shale sample is in a flipping state. On the one hand, this is beneficial to uniform heating of various parts thereof. On the other hand, the shale sample is in the form of broken blocks, and the oil and gas release channels between the sample blocks will be changed during the tumbling process, so that the oil and gas can be released faster and local accumulation can be avoided, which is beneficial to improving the accuracy of the measurement.

[0046] In the present invention, the rotating shaft 14 is driven to rotate by a rotating drive structure. In some embodiments, a rotating shaft 14 can be provided and driven to rotate by a motor or the like. In other embodiments, Figure 1 As shown, there are two rotating shafts 14, which are coaxially arranged and pass through two opposite side walls of the housing 1 respectively; the rotary drive structure includes a double-shaft motor 11 fixed to the outer wall of the housing 1, and the two output ends of the double-shaft motor 11 are symmetrically arranged and respectively fixedly connected to a rotating rod 12; each rotating shaft 14 corresponds to a rotating rod 12, the rotating rod 12 is parallel to the rotating shaft 14, and the rotating rod 12 is connected to the corresponding rotating shaft 14 through a synchronous belt 13. After such arrangement, the two rotating shafts 14 drive the placement basket 15 to rotate, which can reduce the size of a single rotating shaft 14 (reduce the diameter), thereby reducing the heat transfer area of ​​a single rotating shaft to the outside, and reducing the temperature of the end of the rotating shaft 14 located outside the housing 1, especially the temperature at the connection between the rotating shaft 14 and the synchronous belt 13, so as to avoid the synchronous belt 13 from slipping or being damaged by heat. Of course, in some embodiments, a cooling facility can also be provided to cool down the end of the rotating shaft 14 located outside the housing 1, such as providing a fan blade at the end of the rotating shaft 14 located outside the housing 1.

[0047] In the present invention, in order to facilitate the full release of oil and gas in the heated sealing pressure mechanism, in some embodiments, an impeller 5 is provided in the housing 1, and the impeller 5 is directly coaxially fixed on the rotating shaft 14, so that the rotating shaft 14 is used to drive it to rotate, thereby generating thrust to promote the flow of fluid in the housing 1, so that the heat can be evenly distributed.

[0048] In the present invention, the guide pipe 3 is a connecting channel between the heating sealing pressure mechanism and the oil and gas extraction mechanism. The heating sealing pressure mechanism stores oil shale. During the heating process, tiny solid particles such as powder and ash may be generated. Especially after the impeller 5 is set, these solid impurities are suspended in the fluid and are easily accumulated in the pipeline and subsequent equipment, affecting the operation of the subsequent equipment. Therefore, it is necessary to clean the impurities. In some embodiments, a filter plate 32 is set at one end of the guide pipe 3 located in the shell 1 to filter out impurities in the fluid entering the guide pipe 3. In addition, the filter plate 32 needs to be cleaned after being blocked. Therefore, the filter plate 32 is preferably fixed to the entrance of the guide pipe 3 in a detachable manner. For example, in some embodiments, a positioning groove 31 is provided on the side wall of the guide pipe 3, and a second magnetic block 34 is provided on the inner side of the positioning groove 31. The side wall of the filter plate 32 is provided with a first magnetic block 33; the first magnetic block 33 is magnetically connected to the second magnetic block 34. During operation, the oil and gas generated by heating can be absorbed by the guide tube 3, and the absorbed oil and gas can be filtered by the filter plate 32. The staff takes out the first magnetic block 33 from the positioning groove 31, that is, the filter plate 32 can be disassembled, and the first magnetic block 33 is inserted into the positioning groove 31, that is, it can be connected with the second magnetic block 34, and the installation of the filter plate 32 is completed. The operation is simple and convenient.

[0049] In the present invention, a heating device is provided in the heating and sealing pressure mechanism. When in use, the temperature of the outer wall of the shell 1 is relatively high. In order to reduce heat loss, an insulation layer can be provided outside the shell 1. However, after the experiment of the device is completed, the entire heating and sealing pressure mechanism needs to be cooled down so as to take out the oil shale in the basket 15, which in turn requires increasing the heat dissipation of the shell 1. Therefore, in some embodiments, a detachable insulation cotton 23 is provided. For example, in some embodiments, a guide rail 2 is provided on the side wall of the shell 1, and a plurality of groups of mounting rods 21 are slidably connected to the side wall of the guide rail 2. The insulation cotton 23 is a sheet-like foldable structure, and the insulation cotton 23 is fixed on the mounting rod 21 through a connecting frame 22, so that when the mounting rod 21 moves along the guide rail 2, the area of ​​the shell 1 covered by the insulation cotton 23 changes. During operation, the staff pulls the mounting rod 21 to move in the guide rail 2, so that the connecting frame 22 can be driven to move, and the connecting frame 22 can be moved, so that the insulation cotton 23 can be driven to stretch and wrap the shell 1, so as to achieve a heat preservation effect, reduce heat loss during heating, and reduce waste of resources. In other embodiments, two connecting belts 4 are symmetrically arranged at both ends of the thermal insulation cotton 23, and the side wall of each connecting belt 4 is provided with a buckle 41. The side wall of the housing 1 is symmetrically provided with multiple groups of card slots 42, and the card slots 42 and the buckles 41 are connected in a card connection manner. During operation, the staff inserts the buckle 41 into the card slot 42 to fix the thermal insulation cotton 23. The thermal insulation cotton 23 can be fixed by this design, thereby improving the thermal insulation effect.

[0050] In the present invention, the sealing cover 6 is detachably mounted on the opening of the housing 1, and the cover body 16 is detachably mounted on the placement basket 15. The specific detachable manner can be selected according to needs, such as snap connection.

[0051] An operating method of an oil shale oil and gas content measuring device, used to operate the above-mentioned oil shale oil and gas content measuring device, such as Figure 6 As shown, the method comprises the following steps:

[0052] S1. Preparation stage: Ensure that all parts of the device are intact, including the heating, sealing and pressure mechanism, the oil and gas extraction mechanism and the oil and gas collection mechanism;

[0053] S2. Sample preparation: The shale oil samples stored in ultra-low temperature are frozen and crushed with liquid nitrogen, a certain amount of the samples are weighed, and the oil shale samples are placed in a placement basket of a heating, sealing and pressure mechanism, and formation pressure is applied to the oil shale samples by injecting fluid into the heating, sealing and pressure mechanism;

[0054] S3. Oil and gas are generated and collected. During the oil and gas generation process, the placement basket is driven to rotate continuously by the rotary drive structure.

[0055] S31, heating the oil shale sample to release oil and gas, and collecting and measuring the oil and gas through an oil and gas collecting mechanism;

[0056] S32, adding an extractant (such as carbon dioxide) into the heating sealing pressure mechanism through the oil and gas extraction mechanism to extract oil and gas from the oil shale sample, and collecting and measuring the extracted oil and gas through the oil and gas collection mechanism;

[0057] S4. Result measurement and evaluation: Evaluate the oil-bearing structure of shale, including total oil content, oil content, gas content, movable oil content, and oil-gas ratio, based on the measurement results.

[0058] In the present invention, the oil and gas in the oil shale sample are first released by heating. Since the heating method cannot completely release the oil and gas in the oil shale sample, an extractant (such as CO2) is added thereafter to fully release the oil and gas therein by extraction. During the oil and gas collection and metering process, both parts of the oil and gas need to be collected and metered.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the embodiments of the present invention should be covered within the protection scope of the present invention.

Claims

1. A device for measuring oil and gas content in oil shale, characterized in that: include: The heating, sealing and pressure mechanism is used to contain and heat the oil shale sample, and the heating, sealing and pressure mechanism comprises: A shell having an opening, wherein a sealing cover is detachably mounted on the open end of the shell for sealing the opening of the shell; A placement basket suspended in the shell is used to store oil shale samples, wherein the placement basket is provided with an open end, and a cover body is detachably mounted on the open end; A rotating shaft having one end passing through the shell and being rotatably sealed therewith, wherein one end of the rotating shaft located inside the shell is fixedly connected to the placement basket; A rotation driving structure drivingly connected to one end of the rotating shaft located outside the housing, and used for driving the rotating shaft to rotate; A heating rod located in the housing, used to heat the oil shale sample; A flow guide pipe disposed on the side wall of the shell; an oil and gas collecting mechanism connected to the heating, sealing and pressure mechanism via the guide pipe, and used for collecting oil and gas discharged from the heating, sealing and pressure mechanism; an oil and gas extraction mechanism connected to the heating, sealing and pressure mechanism, for extracting oil and gas from the oil shale sample; A filter plate is provided at one end of the flow guide tube located in the shell; the filter plate is fixed to the flow guide tube in a detachable manner; a positioning groove is provided on the side wall of the flow guide tube, a second magnetic block is provided on the inner side of the positioning groove, and a first magnetic block is provided on the side wall of the filter plate; the first magnetic block is magnetically connected to the second magnetic block.

2. The oil shale oil and gas content measuring device according to claim 1, characterized in that: There are two rotating shafts, which are coaxially arranged and pass through two opposite side walls of the shell respectively; the rotary drive structure includes a double-axis motor fixed to the outer wall of the shell, and the two output ends of the double-axis motor are symmetrically arranged and respectively connected to a rotating rod; each rotating shaft corresponds to a rotating rod, the rotating rod is parallel to the rotating shaft, and the rotating rod is connected to the corresponding rotating shaft via a synchronous belt transmission.

3. The oil shale oil and gas content measuring device according to claim 1, characterized in that: It also includes an impeller located in the housing, and the impeller is coaxially fixed on the rotating shaft.

4. The oil shale oil and gas content measuring device according to claim 1, characterized in that: It also includes detachable thermal insulation cotton located outside the shell.

5. The oil shale oil and gas content measuring device according to claim 4, characterized in that: The side wall of the shell is provided with a guide rail, and the side wall of the guide rail is slidably connected to multiple groups of mounting rods. The thermal insulation cotton is a sheet-like foldable structure, and the thermal insulation cotton is fixed to the mounting rod via a connecting frame. When the guide rail moves along the mounting rod, the shell area covered by the thermal insulation cotton changes.

6. The oil shale oil and gas content measuring device according to claim 4, characterized in that: Two connecting belts are symmetrically arranged at both ends of the thermal insulation cotton, and buckles are arranged on the side walls of the connecting belts. Multiple groups of card slots are symmetrically opened on the side walls of the shell, and the card slots and the buckles are connected by snap connection.

7. A method for operating an oil shale oil and gas content measuring device, used for operating the oil shale oil and gas content measuring device according to any one of claims 1 to 6, the method comprising the following steps: S1. Preparation stage: ensure that all parts of the device are in good condition; S2. Sample preparation: the shale oil sample stored in ultra-low temperature is frozen and crushed with liquid nitrogen, a certain amount of the sample is weighed, the oil shale sample is placed in the placement basket of the heating, sealing and pressure mechanism, and formation pressure is applied; S3. Oil and gas generation and collection: S31, heating the oil shale sample to release its oil and gas, and collecting and measuring the oil and gas through the oil and gas collecting mechanism; S32, adding an extractant into the heating, sealing and pressure mechanism through the oil and gas extraction mechanism to extract oil and gas from the oil shale sample, and collecting and measuring the extracted oil and gas through the oil and gas collection mechanism; S4. Result measurement and evaluation: Evaluate the oil-bearing structure in the oil shale based on the measurement results.

Images