Multi-component gas detection device based on VUP-TOP-MS analysis principle

Abstract

The invention discloses a multi-component gas detection device based on a VUP-TOP-MS analysis principle. The multi-component gas detection device comprises a gas inlet system, an ionization system, an ion transmission system and a flight time quality analysis and detection system which are communicated in sequence, the ionization source is arranged in the ionization system along the axial direction; the first molecular pump is arranged at the top of the ionization system in a communicating manner; the second molecular pump is arranged at the top of the ion system in a communicating manner; the lens is arranged in the ion transmission region along the radial direction; the repulsion plate is arranged at the top of the time-of-flight quality analysis and detection system in a supporting manner; the detector is arranged in the flight time quality analysis and detection system and is positioned on one side of the repulsion plate; and the third molecular pump is arranged on one side of the flight time quality analysis and detection system in a communicating manner. Soft ionization of gas molecules can be realized, the analysis period is shortened, and the accuracy of gas detection and quantification is improved.

Description

Technical Field

[0001] The invention relates to a multi-component gas detection device based on the VUP-TOP-MS analysis principle, belonging to the technical field of gas logging in oil exploration and development drilling operations. Background Art

[0002] Gas logging is an important part of comprehensive logging. During the gas logging process, the degasser collects the drilling fluid returned to the ground from the wellbore quantitatively through the mud probe. The gas dissolved in the drilling fluid is separated from the drilling fluid under the action of the centrifugal force of the stirring rod in the degassing chamber. The separated gas enters the gas logging analyzer through the gas pipeline, so as to carry out quantitative analysis and detection of the formation fluid composition and content.

[0003] At present, the offshore multi-component formation fluid gas logging analysis device mainly adopts GC-MS coupling technology, which has the technical defect of long chromatographic separation time of hydrocarbon gas components and analysis cycle of 90s, which can easily lead to the loss of gas logging data and leakage in thin reservoirs, making it difficult to meet the current operational needs of offshore rapid drilling.

[0004] For offshore gas logging operations, the C1-C8 multi-component formation fluid gas logging analysis device mainly uses GC-MS combined technology, which has long chromatographic separation time for hydrocarbon gas components and an analysis cycle of 90s, which can easily lead to problems such as loss of gas logging data and leakage in thin reservoirs, making it difficult to meet the current operational needs of rapid offshore drilling. Summary of the invention

[0005] The present invention designs and develops a multi-component gas detection device based on the VUP-TOP-MS analysis principle, which can realize soft ionization of gas molecules, effectively reduce the generation of fragmented particles in the molecular ionization process, realize high-throughput full-spectrum rapid detection of the molecular ions to be tested by sub-time of flight, shorten the analysis cycle, and improve the accuracy of gas detection and quantification.

[0006] The technical solution provided by the present invention is:

[0007] A multi-component gas detection device based on VUP-TOP-MS analysis principle, comprising:

[0008] An air intake system, an ionization system, an ion transmission system, and a time-of-flight mass analysis detection system connected in sequence;

[0009] an ionization source, which is axially arranged in the ionization system;

[0010] A first molecular pump, which is connected and arranged at the top of the ionization system;

[0011] A second molecular pump, which is connected and arranged on the top of the ion system;

[0012] A lens, which is radially arranged in the ion transmission area;

[0013] A repeller plate, the support of which is arranged on the top of the time-of-flight mass analysis detection system;

[0014] A detector, which is arranged inside the time-of-flight mass analysis detection system and located on one side of the repeller plate;

[0015] A third molecular pump is connected and arranged on one side of the time-of-flight mass analysis detection system.

[0016] Preferably, it also includes:

[0017] A gas pipeline, which is connected and arranged at the bottom of the air intake system;

[0018] An EPC control valve is connected and arranged on the gas pipeline.

[0019] Preferably, the gas pipeline is made of Futron.

[0020] Preferably, it also includes:

[0021] An ionization region is disposed in the ionization system and is close to the ionization source.

[0022] Preferably, the ionization source is a vacuum ultraviolet photoionization source.

[0023] Preferably, it also includes:

[0024] An acceleration zone, which is arranged in the time-of-flight mass analysis detection system and is located below the repeller plate;

[0025] The reflection area is arranged at the lower part of the time-of-flight mass analysis detection system.

[0026] The beneficial effects of the present invention are:

[0027] The multi-component gas detection device based on the VUP-TOF-MS analysis principle provided by the present invention can effectively reduce the generation of fragmented ions in the molecular ionization process and improve the accuracy of detection and quantification by utilizing the VUP-TOF-MS gas detection and analysis technology. On the other hand, it avoids the technical disadvantage of the long analysis cycle of the GC / MS combination technology. The TOF-MS technology realizes high-throughput full-spectrum rapid detection of the molecular ions to be tested in a single flight time, thereby shortening the analysis cycle.

[0028] VUP (vacuum ultraviolet ionization source) is used to softly ionize gas components to form molecular ions, effectively reducing the generation of fragmented ions during molecular ionization and improving the accuracy of detection and quantification. TOF-MS (time-of-flight mass spectrometry) technology is used to achieve high-throughput full-spectrum rapid detection of molecular ions to be tested in a single flight time based on the different times it takes for molecular ions with different mass-to-charge ratios to pass through the flight tube and reach the detector, thus shortening the analysis cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural schematic diagram of multi-component formation fluid detection based on the VUP-TOF-MS technical principle described in the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0031] like Figure 1 As shown, the present invention provides a multi-component gas detection device based on the VUP-TOP-MS analysis principle, comprising: a gas pipeline 1, an EPC control valve 2, an ionization source 3, an ionization zone 4, a first molecular pump 5, a second molecular pump 6, a lens 7, a repulsion plate 8, an acceleration zone 9, a third molecular pump 10, a reflection zone 11, gas molecular ions 12, and a detector 13.

[0032] The multi-component gas detection device of the present invention comprises: an air intake system, an ionization system, an ion transmission system and a time-of-flight mass analysis detection system, supplemented by a vacuum and power supply system. The air intake system comprises: a gas pipeline 1 and two groups of EPC control valves, the ionization system comprises: an ionization source 3, an ionization region 4 and a first molecular pump 5, the ion transmission system comprises: a second molecular pump 6 and a lens 7, and the time-of-flight mass analysis monitoring system comprises: a repelling plate 8, an acceleration region 9, a third molecular pump 10, a reflection region 11, gas molecules 12 and a detector 13.

[0033] The gas pipeline 1 is connected to the bottom of the ionization system. An EPC control valve is connected to the gas pipeline 1. The ionization source 3 is axially arranged in the ionization system. The ionization zone 4 is close to the ionization source. A first molecular pump 5 is connected to the top of the ionization system.

[0034] The lens 7 is radially arranged in the ion transmission area, and the second molecular pump 6 is connected and arranged at the top of the ion transmission area. The repeller plate 8 is supported and arranged at the top of the time-of-flight mass analysis detection system, the acceleration area 9 is arranged below the repeller plate 8, the third molecular pump 10 is connected and arranged at one side of the time-of-flight mass analysis detection system, the reflection area 11 is arranged at the lower part of the time-of-flight mass analysis detection system, and the detector 13 is arranged at the upper part of the time-of-flight mass analysis detection system and is located at one side of the repeller plate 8.

[0035] Working process:

[0036] The drilling fluid returned from the bottom of the well is degassed by the GZG quantitative degasser. Under the action of negative pressure, the gas enters the ionization system from the gas pipeline 1. The gas pipeline 1 is made of Futron material, which can effectively avoid the influence of gas adsorption. During the gas transmission process, the EPC control valve 2 accurately controls the gas flow and pressure; the gas molecules are ionized into gas molecular ions under the action of vacuum ultraviolet light of the ionization source 3. The first molecular pump 5 provides a vacuum environment for the ionization zone 4, and the molecular ions enter the ion transmission system under the action of pressure; the gas is focused into a narrow beam under the action of the ion transmission system lens 7, and the molecular ions are transmitted to the flight time mass analysis detection system under the action of the second molecular pump 6; the molecular ions 12 fly at a uniform speed in the field-free flight zone under the dual acceleration of the repulsion plate 8 and the acceleration zone 9, and enter the reflection zone 11. The third molecular pump 10 provides a vacuum environment for the detection system. The molecular ions 12 with different mass-to-charge ratios reach the detector at different times through the flight tube, and are reflected to the detector 13 in turn, so as to achieve the purpose of formation multi-component fluid detection.

[0037] The multi-component gas detection device based on the VUP-TOF-MS analysis principle provided by the present invention can effectively reduce the generation of fragmented ions in the molecular ionization process and improve the accuracy of detection and quantification by utilizing the VUP-TOF-MS gas detection and analysis technology. On the other hand, it avoids the technical disadvantage of the long analysis cycle of the GC / MS combination technology. The TOF-MS technology realizes high-throughput full-spectrum rapid detection of the molecular ions to be tested in a single flight time, thereby shortening the analysis cycle.

[0038] VUP (vacuum ultraviolet ionization source) is used to softly ionize gas components to form molecular ions, effectively reducing the generation of fragmented ions during molecular ionization and improving the accuracy of detection and quantification. TOF-MS (time-of-flight mass spectrometry) technology is used to achieve high-throughput full-spectrum rapid detection of molecular ions to be tested in a single flight time based on the different times it takes for molecular ions with different mass-to-charge ratios to pass through the flight tube and reach the detector, thus shortening the analysis cycle.

[0039] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A multi-component gas detection device based on VUP-TOP-MS analysis principle, characterized in that: include: An air intake system, an ionization system, an ion transmission system, and a time-of-flight mass analysis detection system connected in sequence; an ionization source, which is axially arranged in the ionization system; A first molecular pump, which is connected and arranged at the top of the ionization system; A second molecular pump, which is connected and arranged on the top of the ion system; A lens, which is radially arranged in the ion transmission area; A repeller plate, the support of which is arranged on the top of the time-of-flight mass analysis detection system; A detector, which is arranged inside the time-of-flight mass analysis detection system and located on one side of the repeller plate; A third molecular pump is connected and arranged on one side of the time-of-flight mass analysis detection system.

2. The multi-component gas detection device based on the VUP-TOP-MS analysis principle according to claim 1 is characterized in that: Also includes: A gas pipeline, which is connected and arranged at the bottom of the air intake system; An EPC control valve is connected and arranged on the gas pipeline.

3. The multi-component gas detection device based on the VUP-TOP-MS analysis principle according to claim 2 is characterized in that: The gas pipeline is made of Futron.

4. The multi-component gas detection device based on the VUP-TOP-MS analysis principle according to claim 3 is characterized in that: Also includes: An ionization region is disposed in the ionization system and is close to the ionization source.

5. The multi-component gas detection device based on the VUP-TOP-MS analysis principle according to claim 4 is characterized in that: The ionization source is a vacuum ultraviolet photoionization source.

6. The multi-component gas detection device based on the VUP-TOP-MS analysis principle according to claim 5 is characterized in that: Also includes: An acceleration zone, which is arranged in the time-of-flight mass analysis detection system and is located below the repeller plate; The reflection area is arranged at the lower part of the time-of-flight mass analysis detection system.

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