Quantitative sample injection system and method for oil logging non-hydrocarbon analyzer

Abstract

The invention relates to the technical field of logging, in particular to a quantitative sample injection system and method for a petroleum logging non-hydrocarbon analyzer, and the quantitative sample injection system comprises a main box body, an air compressor, and a sample pump, a gas path control module, a carbon dioxide analysis module, a combustible gas analysis module, a hydrogen analysis module and a waste gas treatment module which are positioned in the main box body; the method comprises the following steps: (1) pipeline connection; the device is reasonable and compact in structure and ingenious in conception, and the pressure of sample gas supplied into the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module is monitored in real time by arranging the first pressure sensor, the second pressure sensor and the third pressure sensor; by arranging a first pressure control valve, a second pressure control valve and a third pressure control valve, the pressure and the flow speed of sample gas supplied into the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module are quantitatively adjusted, and the device has the characteristics of stability, reliability and quantification.

Description

Technical Field

[0001] The invention relates to the technical field of well logging, and is a quantitative sampling system and method for a petroleum well logging non-hydrocarbon analyzer. Background Art

[0002] In the process of oil and gas exploration and development, the analysis of the gas content of non-hydrocarbon compounds such as carbon monoxide, carbon dioxide, and hydrogen is called non-hydrocarbons, which is of great significance for identifying oil and gas reservoir types and marker layers, as well as ensuring the safety of drilling and well control. At present, the sample gas of the non-hydrocarbon analyzer is connected in series with the sample gas of the hydrogen flame chromatograph, and the exhaust gas of the hydrogen flame chromatograph is used as the sample gas for analysis. There is no independent sampling analysis system, and there are four deficiencies in use: First, the sample gas pressure and flow rate of different types of chromatographs are different. If the pressure and flow rate are too large, the value analyzed by the non-hydrocarbon analyzer will be too large, and vice versa, the value will be too small, causing data distortion; second, when the chromatograph fails, the sample pump stops working, and the non-hydrocarbon analyzer is forced to stop data analysis; third, the sample gas pressure and flow rate required by different types of non-hydrocarbon analyzers are also different, and the optimal working conditions cannot be achieved with the help of the chromatograph sample system; fourth, some chromatograph sample gas analysis front-ends do not reserve non-hydrocarbon access ports, and the gas analyzed by the chromatograph is input into the non-hydrocarbon analyzer for analysis. The chromatograph is analyzed by combustion, and the non-hydrocarbon content of the analyzed gas changes, resulting in the analysis data being inconsistent with the actual content of the formation gas. No matter which reason it is, it will have different degrees of impact on the evaluation of oil and gas reservoirs, and also affect the accurate identification of drilling engineering anomalies and well control safety. Summary of the invention

[0003] The present invention provides a quantitative sampling system and method for a petroleum logging non-hydrocarbon analyzer, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem that the prior non-hydrocarbon analyzer cannot change the intake pressure according to different gas types.

[0004] One of the technical solutions of the present invention is achieved through the following measures: a quantitative sampling system for a petroleum logging non-hydrocarbon analyzer, comprising a main box, an air compressor and a sample pump located in the main box, an air circuit control module, a carbon dioxide analysis module, a combustible gas analysis module, a hydrogen analysis module, and an exhaust gas treatment module, wherein an air pipe, an exhaust gas pipe and a sample gas pipe are respectively arranged on the outer side of the upper part of the main box, the carbon dioxide analysis module is provided with a first air inlet pipe and a first air outlet pipe, the combustible gas analysis module is provided with a second air inlet pipe and a second air outlet pipe, and the hydrogen analysis module is provided with a third air inlet pipe and a third air outlet pipe; the air circuit control module comprises a five-way control valve and a control module, the first end of the five-way control valve is fixedly connected to the first air inlet pipe through a first pipeline, the first pipeline is provided with a first pressure control valve and a first pressure sensor, the second end of the five-way control valve is fixedly connected to the second air inlet pipe through a second pipeline, the second pipeline is provided with a second pressure control valve and a second pressure sensor, the third end of the five-way control valve is fixedly connected to the third air inlet pipe through a third pipeline, and the third A third pressure control valve and a third pressure sensor are provided on the pipeline, the air outlet end of the air compressor and the air inlet end of the air pipe are fixedly connected together through a fourth pipeline, the air outlet end of the air pipe and the fourth end of the five-way control valve are fixedly connected together through a fifth pipeline, the air outlet end of the sample gas pipe and the air inlet end of the sample pump are fixedly connected together through a sixth pipeline, the air outlet end of the sample pump and the fifth end of the five-way control valve are fixedly connected together through a seventh pipeline, the first pressure sensor, the second pressure sensor and the third pressure sensor are all connected to the control module, and the control module is respectively connected to the five-way control valve, the first pressure control valve, the second pressure control valve, the third pressure control valve, the air compressor and the sample pump; the exhaust gas treatment module includes a four-way joint, the first air outlet pipe and the first end of the four-way joint are fixedly connected together through an eighth pipeline, the second air outlet pipe and the second end of the four-way joint are fixedly connected together through a ninth pipeline, the third air outlet pipe and the third end of the four-way joint are fixedly connected together through a tenth pipeline, and the fourth end of the four-way joint and the air inlet end of the exhaust gas pipe are fixedly connected together through an eleventh pipeline.

[0005] The following is a further optimization and / or improvement of one of the above-mentioned technical solutions: The above-mentioned exhaust gas treatment module may also include a first one-way valve, a second one-way valve and a third one-way valve. The first one-way valve is provided on the eighth pipeline, the second one-way valve is provided on the ninth pipeline, and the third one-way valve is provided on the tenth pipeline.

[0006] The second technical solution of the present invention is achieved by the following measures: A method of using the above-mentioned quantitative sampling system of the oil logging non-hydrocarbon analyzer comprises the following steps: (1) Pipeline connection: install the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline, the sixth pipeline, the seventh pipeline, the eighth pipeline, the ninth pipeline, the tenth pipeline and the eleventh pipeline respectively; (2) Supplying sample gas: The outlet end of the sample gas source to be analyzed is fixedly connected with the inlet end of the sample gas pipe, and the sample gas to be analyzed is supplied to the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module through the five-way control valve by the sample pump; (3) Sample gas analysis: The carbon dioxide analysis module, combustible gas analysis module and hydrogen analysis module perform gas analysis on the sample gas respectively; (4) Sample gas pressure regulation: If the first pressure sensor detects that the gas pressure is too low or too high, the control module controls the first pressure control valve to quantitatively regulate the intake pressure; if the second pressure sensor detects that the gas pressure is too low or too high, the control module controls the second pressure control valve to quantitatively regulate the intake pressure; if the third pressure sensor detects that the gas pressure is too low or too high, the control module controls the third pressure control valve to quantitatively regulate the intake pressure; if the first pressure control valve and / or the second pressure control valve and / or the third pressure control valve are adjusted to the maximum and still do not meet the gas pressure requirement, the control module controls the sample pump to increase the pump speed; if the first pressure control valve and / or the second pressure control valve and / or the third pressure control valve are adjusted to the minimum and still do not meet the gas pressure requirement, the control module controls the sample pump to reduce the pump speed; (5) Cleaning: When the analysis is stopped or the high-concentration analysis is performed for a long time, the control module turns off the sample pump and turns on the air compressor. The compressed air is supplied to the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module through the five-way control valve. The waste gas generated by the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module is discharged from the waste gas connection pipe through the four-way joint; (6) Clearing the obstruction: When the sample gas encounters obstruction after passing through the five-way control valve, the control module starts the air compressor and controls the sample pump to reverse. The compressed air is supplied to the sample pump, carbon dioxide analysis module, combustible gas analysis module and hydrogen analysis module respectively through the five-way control valve for backblowing and clearing the obstruction.

[0007] The present invention has a reasonable and compact structure and an ingenious conception. By arranging a first pressure sensor, a second pressure sensor and a third pressure sensor, the pressure of the sample gas supplied to the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module can be monitored in real time; by arranging a first pressure control valve, a second pressure control valve and a third pressure control valve, the pressure and flow rate of the sample gas supplied to the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module can be quantitatively adjusted; by arranging a fourth pipeline and a fifth pipeline, cleaning or clearing of obstructions can be completed, and the invention has the characteristics of stability, reliability and quantitativeness. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Attached Figure 1 It is a schematic diagram of the top structure of embodiments 1 to 3.

[0009] Attached Figure 2 For attachment Figure 1 Process flow chart of .

[0010] The codes in the attached drawings are: 1 is the main box, 2 is the air compressor, 3 is the sample pump, 4 is the power supply, 5 is the control module, 6 is the five-way control valve, 7 is the first pressure control valve, 8 is the first pressure sensor, 9 is the second pressure control valve, 10 is the second pressure sensor, 11 is the third pressure control valve, 12 is the third pressure sensor, 13 is the carbon dioxide analysis module, 14 is the first air inlet pipe, 15 is the first air outlet pipe, 16 is the combustible gas analysis module, 17 is the second air inlet pipe, 18 is the second air outlet pipe, 19 is the combustible gas analysis module, 20 is the second air inlet pipe, 21 is the second air outlet pipe, 22 is the third air outlet pipe, 23 is the third air outlet pipe, 24 is the third air outlet pipe, 25 is the third air outlet pipe, 26 is the third air outlet pipe, 27 is the third air outlet pipe, 28 is the third air outlet pipe, 29 is the third air outlet pipe, 30 is the third air outlet pipe, 31 is the third air outlet pipe, 32 is the third air outlet pipe, 33 is the third air outlet pipe, 34 is the third air outlet pipe, 35 is the third air outlet pipe, 36 is the third air outlet pipe, 37 is the third air outlet pipe, 38 is the third air outlet pipe, 39 is the fourth air outlet pipe, 40 is the fifth air outlet pipe, 41 is the fifth air outlet pipe, 42 is the fifth air outlet pipe, 43 is the fifth air outlet pipe, 44 is the fifth air outlet pipe, 45 is the fifth air outlet pipe, 46 is the fifth air outlet pipe, 47 is the fifth air outlet pipe, 48 is the fifth air outlet pipe, 49 is the fifth air outlet pipe, 50 is the fifth air outlet pipe, 51 is the fifth air outlet pipe, 52 is the 9 is a hydrogen analysis module, 20 is a third air inlet pipe, 21 is a third air outlet pipe, 22 is a four-way connector, 23 is a first one-way valve, 24 is a second one-way valve, 25 is a third one-way valve, 26 is an air pipe, 27 is an exhaust gas pipe, 28 is a sample gas pipe, 29 is a first pipeline, 30 is a second pipeline, 31 is a third pipeline, 32 is a fourth pipeline, 33 is a fifth pipeline, 34 is a sixth pipeline, 35 is a seventh pipeline, 36 is an eighth pipeline, 37 is a ninth pipeline, 38 is a tenth pipeline, and 39 is an eleventh pipeline. DETAILED DESCRIPTION

[0011] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0012] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 The layout direction is determined by the

[0013] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As attached Figure 1 , 2As shown, the quantitative sampling system of the oil logging non-hydrocarbon analyzer includes a main box 1, an air compressor 2 and a sample pump 3 located in the main box 1, an air circuit control module, a carbon dioxide analysis module 13, a combustible gas analysis module 16, a hydrogen analysis module 19, and an exhaust gas treatment module. An air pipe 26, an exhaust gas pipe 27 and a sample gas pipe 28 are respectively provided on the outer side of the upper part of the main box 1. The carbon dioxide analysis module 13 is provided with a first air inlet pipe 14 and a first air outlet pipe 15. The combustible gas analysis module 16 is provided with a second air inlet pipe 17 and a second air outlet pipe 18. The hydrogen analysis module 19 is provided with a third air inlet pipe 20 and a third air outlet pipe 21; the air circuit control module includes a five-way control valve 6 and a control module 5, a first end of the five-way control valve 6 is fixedly connected to the first air inlet pipe 14 through a first pipeline 29, and a first pressure control valve 7 and a first pressure sensor 8 are provided on the first pipeline 29, a second end of the five-way control valve 6 is fixedly connected to the second air inlet pipe 17 through a second pipeline 30, and a second pressure control valve 9 and a second pressure sensor 10 are provided on the second pipeline 30, a third end of the five-way control valve 6 is fixedly connected to the third air inlet pipe 20 through a third pipeline 31, and a third pressure control valve 9 and a second pressure sensor 10 are provided on the third pipeline 31. The valve 11 and the third pressure sensor 12, the air outlet end of the air compressor 2 and the air inlet end of the air pipe 26 are fixedly connected together through the fourth pipeline 32, the air outlet end of the air pipe 26 and the fourth end of the five-way control valve 6 are fixedly connected together through the fifth pipeline 33, the air outlet end of the sample gas pipe 28 and the air inlet end of the sample pump 3 are fixedly connected together through the sixth pipeline 34, the air outlet end of the sample pump 3 and the fifth end of the five-way control valve 6 are fixedly connected together through the seventh pipeline 35, the first pressure sensor 8, the second pressure sensor 10 and the third pressure sensor 12 are all connected to the control module 5, and the control module 5 is respectively connected to the five The control valve 6, the first pressure control valve 7, the second pressure control valve 9, the third pressure control valve 11, the air compressor 2 and the sample pump 3 are connected; the exhaust gas treatment module includes a four-way joint 22, the first air outlet pipe 15 and the first end of the four-way joint 22 are fixedly connected together through the eighth pipeline 36, the second air outlet pipe 18 and the second end of the four-way joint 22 are fixedly connected together through the ninth pipeline 37, the third air outlet pipe 21 and the third end of the four-way joint 22 are fixedly connected together through the tenth pipeline 38, and the fourth end of the four-way joint 22 and the air inlet end of the exhaust gas pipe 27 are fixedly connected together through the eleventh pipeline 39.During use, by setting the first pressure sensor 8, the second pressure sensor 10 and the third pressure sensor 12, the sample gas pressure supplied to the carbon dioxide analysis module 13, the combustible gas analysis module 16 and the hydrogen analysis module 19 is monitored in real time; by setting the first pressure control valve 7, the second pressure control valve 9 and the third pressure control valve 11, the sample gas pressure and flow rate supplied to the carbon dioxide analysis module 13, the combustible gas analysis module 16 and the hydrogen analysis module 19 are quantitatively adjusted; by setting the fourth pipeline 32 and the fifth pipeline 33, cleaning or clearing is completed. According to the requirements, the control module 5 is an existing public known technology, which can be a PLC controller, and its model can be 32F103.

[0014] According to actual needs, the quantitative sampling system of the above-mentioned oil logging non-hydrocarbon analyzer can be further optimized and / or improved: Embodiment 2: As attached Figure 1 , 2 As shown, the exhaust gas treatment module further includes a first one-way valve 23, a second one-way valve 24 and a third one-way valve 25. The first one-way valve 23 is provided on the eighth pipeline 36, the second one-way valve 24 is provided on the ninth pipeline 37, and the third one-way valve 25 is provided on the tenth pipeline 38. In use, such an arrangement effectively prevents exhaust gas from flowing back.

[0015] Embodiment 3: As attached Figure 1 , 2 As shown, a method for repairing and disassembling the above crankshaft pump positioning sleeve 7 includes the following steps: (1) Pipeline connection: install the first pipeline 29, the second pipeline 30, the third pipeline 31, the fourth pipeline 32, the fifth pipeline 33, the sixth pipeline 34, the seventh pipeline 35, the eighth pipeline 36, the ninth pipeline 37, the tenth pipeline 38 and the eleventh pipeline 39 respectively; (2) Supplying sample gas: The outlet end of the sample gas source to be analyzed is fixedly connected to the inlet end of the sample gas pipe 28, and the sample gas to be analyzed is supplied to the carbon dioxide analysis module 13, the combustible gas analysis module 16 and the hydrogen analysis module 19 through the sample pump 3 and the five-way control valve 6 respectively; (3) Sample gas analysis: the carbon dioxide analysis module 13, the combustible gas analysis module 16 and the hydrogen analysis module 19 respectively perform gas analysis on the sample gas; (4) Sample gas pressure regulation: If the first pressure sensor 8 detects that the gas pressure is too low or too high, the control module 5 controls the first pressure control valve 7 to quantitatively regulate the intake pressure; if the second pressure sensor 10 detects that the gas pressure is too low or too high, the control module 5 controls the second pressure control valve 9 to quantitatively regulate the intake pressure; if the third pressure sensor 12 detects that the gas pressure is too low or too high, the control module 5 controls the third pressure control valve 11 to quantitatively regulate the intake pressure; if the first pressure control valve 7 or / and the second pressure control valve 9 or / and the third pressure control valve 11 are adjusted to the maximum and still do not meet the gas pressure requirement, the control module 5 controls the sample pump 3 to increase the pump speed; if the first pressure control valve 7 or / and the second pressure control valve 9 or / and the third pressure control valve 11 are adjusted to the minimum and still do not meet the gas pressure requirement, the control module 5 controls the sample pump 3 to reduce the pump speed; (5) Cleaning: When the analysis is stopped or the analysis is performed for a long time at a high concentration, the control module 5 turns off the sample pump 3 and turns on the air compressor 2. The compressed air is supplied to the carbon dioxide analysis module 13, the combustible gas analysis module 16 and the hydrogen analysis module 19 through the five-way control valve 6. The waste gas generated by the carbon dioxide analysis module 13, the combustible gas analysis module 16 and the hydrogen analysis module 19 is discharged from the waste gas connection pipe 27 through the four-way joint 22. (6) Clearing the obstruction: When the sample gas encounters obstruction after passing through the five-way control valve 6, the control module 5 starts the air compressor 2 and controls the sample pump 3 to reverse. The compressed air is supplied to the sample pump 3, the carbon dioxide analysis module 13, the combustible gas analysis module 16 and the hydrogen analysis module 19 respectively through the five-way control valve 6 for backblowing and clearing the obstruction.

[0016] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A quantitative sampling system for a petroleum logging non-hydrocarbon analyzer, characterized in that It includes a main box body, an air compressor and a sample pump located in the main box body, an air circuit control module, a carbon dioxide analysis module, a combustible gas analysis module, a hydrogen analysis module, and an exhaust gas treatment module. The outer side of the upper part of the main box body is respectively provided with an air pipe, an exhaust gas pipe and a sample gas pipe. The carbon dioxide analysis module is provided with a first air inlet pipe and a first air outlet pipe, the combustible gas analysis module is provided with a second air inlet pipe and a second air outlet pipe, and the hydrogen analysis module is provided with a third air inlet pipe and a third air outlet pipe; the air circuit control module includes a five-way control valve and a control module, the first end of the five-way control valve is fixedly connected with the first air inlet pipe through a first pipeline, the first pipeline is provided with a first pressure control valve and a first pressure sensor, the second end of the five-way control valve is fixedly connected with the second air inlet pipe through a second pipeline, the second pipeline is provided with a second pressure control valve and a second pressure sensor, the third end of the five-way control valve is fixedly connected with the third air inlet pipe through a third pipeline, and the third pipeline is provided with a third pressure control valve and a third pressure sensor The air outlet end of the air compressor and the air inlet end of the air pipe are fixedly connected together through a fourth pipeline, the air outlet end of the air pipe and the fourth end of the five-way control valve are fixedly connected together through a fifth pipeline, the air outlet end of the sample gas pipe and the air inlet end of the sample pump are fixedly connected together through a sixth pipeline, the air outlet end of the sample pump and the fifth end of the five-way control valve are fixedly connected together through a seventh pipeline, the first pressure sensor, the second pressure sensor and the third pressure sensor are all connected to the control module, and the control module is respectively connected to the five-way control valve, the first pressure control valve, the second pressure control valve, the third pressure control valve, the air compressor and the sample pump; the exhaust gas treatment module includes a four-way joint, the first air outlet pipe and the first end of the four-way joint are fixedly connected together through an eighth pipeline, the second air outlet pipe and the second end of the four-way joint are fixedly connected together through a ninth pipeline, the third air outlet pipe and the third end of the four-way joint are fixedly connected together through a tenth pipeline, and the fourth end of the four-way joint is fixedly connected to the air inlet end of the exhaust gas pipe through an eleventh pipeline.

2. The quantitative sampling system for oil logging non-hydrocarbon analyzer according to claim 1 is characterized in that The exhaust gas treatment module also includes a first one-way valve, a second one-way valve and a third one-way valve. The first one-way valve is arranged on the eighth pipeline, the second one-way valve is arranged on the ninth pipeline, and the third one-way valve is arranged on the tenth pipeline.

3. A method for a quantitative sampling system of a petroleum logging non-hydrocarbon analyzer according to any one of claims 1 to 2, characterized in that The steps include: (1) Pipeline connection: install the first pipeline, the second pipeline, the third pipeline, the fourth pipeline, the fifth pipeline, the sixth pipeline, the seventh pipeline, the eighth pipeline, the ninth pipeline, the tenth pipeline and the eleventh pipeline respectively; (2) Supplying sample gas: The outlet end of the sample gas source to be analyzed is fixedly connected to the inlet end of the sample gas pipe, and the sample gas to be analyzed is supplied to the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module through the five-way control valve by a sample pump; (3) Sample gas analysis: The carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module respectively perform gas analysis on the sample gas; (4) Sample gas pressure regulation: If the first pressure sensor detects that the gas pressure is too low or too high, the control module controls the first pressure control valve to quantitatively regulate the intake pressure; if the second pressure sensor detects that the gas pressure is too low or too high, the control module controls the second pressure control valve to quantitatively regulate the intake pressure; if the third pressure sensor detects that the gas pressure is too low or too high, the control module controls the third pressure control valve to quantitatively regulate the intake pressure; if the first pressure control valve and / or the second pressure control valve and / or the third pressure control valve are adjusted to the maximum and still do not meet the gas pressure requirement, the control module controls the sample pump to increase the pump speed; if the first pressure control valve and / or the second pressure control valve and / or the third pressure control valve are adjusted to the minimum and still do not meet the gas pressure requirement, the control module controls the sample pump to reduce the pump speed; (5) Cleaning: When the analysis is stopped or a long period of high-concentration analysis is completed, the control module turns off the sample pump and turns on the air compressor. The compressed air is supplied to the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module through the five-way control valve. The waste gas generated by the carbon dioxide analysis module, the combustible gas analysis module and the hydrogen analysis module is discharged from the waste gas connection pipe through the four-way joint; (6) Clearing the obstruction: When the sample gas encounters obstruction after passing through the five-way control valve, the control module starts the air compressor and controls the sample pump to reverse. The compressed air is supplied to the sample pump, carbon dioxide analysis module, combustible gas analysis module and hydrogen analysis module respectively through the five-way control valve for backblowing and clearing the obstruction.

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