Multi-component double-flow analysis device and method for logging chromatograph
阅读说明：本技术 录井色谱仪多组份双流程分析装置及分析方法 (Multi-component double-flow analysis device and method for logging chromatograph ) 是由 万亚旗 王伟东 朱祥华 喻杰 李忠仓 崔秀辉 吴刚 袁春阳 潘增磊 左朝华 于 2018-09-07 设计创作，主要内容包括：本发明涉及录井色谱分析仪器领域中的一种录井色谱仪多组分双流程分析装置和分析方法,该通过双十通阀、双定量管、双套色谱柱及FID检测器,实现气路流程的改变和烃类组份快速分离快速检测的目的,其中十通阀是有10个孔道的旋转阀,达到改变气路流程的目的；定量管用于存储烃类样气,携带样气进入色谱柱,最后进入FID检测器分析；装置中使用氢气作为携带样气的载气,一路进入FID检测器(后),对C6-C8样气分析；另一路进入FID检测器(前),对C1-C5样气分析。本装置提高了检测的范围,使录井气相色谱仪FID的检测范围达到C8；同时缩短了多组份分析运行周期,运行周期达到了60秒；完全满足了录井现状的需求。(The invention relates to a multi-component double-flow-path analysis device and an analysis method of a logging chromatograph in the field of logging chromatographic analysis instruments, wherein the purpose of changing the gas path flow and quickly separating and detecting hydrocarbon components is realized through a double ten-way valve, a double quantitative tube, double sets of chromatographic columns and an FID detector, wherein the ten-way valve is a rotary valve with 10 pore canals so as to change the gas path flow; the quantitative tube is used for storing hydrocarbon sample gas, carrying the sample gas to enter a chromatographic column and finally entering an FID detector for analysis; hydrogen is used as carrier gas carrying sample gas in the device, one path of hydrogen enters an FID detector (back), and C6-C8 sample gas is analyzed; the other path enters a FID detector (front) and is analyzed for C1-C5 sample gas. The device improves the detection range, and the detection range of the logging gas chromatograph FID reaches C8; meanwhile, the multi-component analysis running period is shortened and reaches 60 seconds; the requirements of the current situation of logging are completely met.)
1. Log chromatograph multicomponent double-flow path analytical equipment, including chromatographic column, pre-cut post, ten logical valve system, ration pipe and FID detector pass through the log chromatograph unit of pipe connection, wherein ten logical valve system includes ten logical valve, actuating mechanism and control system, its characterized in that: the ten-way valve is a rotary valve with 1-10 pore channels uniformly distributed on the cylindrical valve body, and two adjacent pore channels can be communicated; the logging chromatograph multi-component double-flow-path analysis device is of a combined structure formed by two groups of logging chromatograph units A and B, wherein the logging chromatograph units A are connected in a manner that: the quantitative tube A is connected between a pore channel 1 and a pore channel 8 of the ten-way valve A, the precutting column A is connected between pore channels 2 and 5 of the ten-way valve A, the chromatographic column A is connected between a pore channel 6 of the ten-way valve A and the FID detector A, a pore channel 9 of the ten-way valve A is connected with the sample gas, and a pore channel 7 of the ten-way valve A is connected with the pressure controller A; the connection relation of the well chromatograph unit B is as follows: the quantitative pipe B is connected between a pore channel 3 and a pore channel 10 of the ten-way valve B, the precutting column B is connected between pore channels 4 and 8 of the ten-way valve B, the chromatographic column B is connected between a pore channel 7 of the ten-way valve B and the FID detector B, a pore channel 1 of the ten-way valve B is connected with sample gas emptying, a pore channel 5 of the ten-way valve B is connected with back flushing emptying, and pore channels 6 and 9 of the ten-way valve B are respectively connected with a pressure controller B, C; the pore channel 10 of the logging chromatograph unit A ten-way valve A is connected with the pore channel 2 of the logging chromatograph unit B ten-way valve B through a pipeline.
2. The multi-component dual-flow analysis device of a logging chromatograph of claim 1, wherein: and the driving mechanism of the ten-way valve system is a ten-way valve driving cylinder.
3. The multi-component dual-flow analysis device of a logging chromatograph according to claim 1 or 2, characterized in that: and the pressure controller A of the logging chromatograph unit A and the pressure controllers B and C of the logging chromatograph unit B provide carrier gas power for sample gas by connecting a hydrogen gas path.
4. The multi-component dual-flow analysis device of a logging chromatograph of claim 3, wherein: and the pressure controller A, the pressure controllers B and C are all electronic pressure controllers.
5. The multi-component dual-flow analysis device of a logging chromatograph of claim 4, wherein: the quantitative tubes A and B are a section of hollow stainless steel pipeline with a volume of 100 uL.
6. An analysis method using the multi-component dual-flow analysis apparatus of the logging chromatograph of claim 4, characterized in that:
the rotation of the ten-way valve A and the rotation of the ten-way valve B are controlled by software of a logging chromatograph, and the program setting period is 60 seconds;
the ten-way valve A is switched at 18 seconds in each period, a 0-18 second gas circuit runs through a pore channel 1-2, a pore channel 3-4, a pore channel 5-6, a pore channel 7-8 and a pore channel 9-10, at the moment, hydrogen in the ten-way valve A passes through the electronic pressure controller A, passes through a pore channel 8 of a pore channel 7 of the ten-way valve A, carries sample gas in the quantitative tube A, passes through the pore channel 1 and the pore channel 2 of the ten-way valve A, reaches the pre-cut column A, passes through the pore channel 6 of the pore channel 5, reaches the chromatographic column A, finally enters the FID detector A for combustion, and the sample gas enters the ten-way valve B through the pore channel 9 and the pore channel 10 of the; the gas path is carried out for 18-60 seconds through the pore channel 2-3, the pore channel 4-5, the pore channel 6-7, the pore channel 8-9 and the pore channel 10-1, at the moment, the hydrogen in the ten-way valve A passes through the electronic pressure controller A, passes through the pore channel 7 and the pore channel 6 of the ten-way valve A, reaches the chromatographic column A, continues to carry the sample gas to enter the FID detector A for combustion, and the sample gas enters the quantitative tube A through the pore channel 9 and the pore channel 8 of the ten-way valve A and then enters the ten-way valve B through the pore channel 10 for sample;
the ten-way valve B is switched at 6 seconds in each period, a 0-6 second gas circuit is used for flowing through a pore channel 1-2, a pore channel 3-4, a pore channel 5-6, a pore channel 7-8 and a pore channel 9-10, at the moment, hydrogen in the ten-way valve B passes through the electronic pressure controller C, passes through the pore channel 9 and the pore channel 10 of the ten-way valve B, carries sample gas in the quantitative pipe B, reaches the pre-cut column B through the pore channel 4 of the ten-way valve B, reaches the chromatographic column B through the pore channel 7 of the pore channel 8, finally enters the FID detector B for combustion, the other path of hydrogen reaches the pore channel 5 of the pore channel 6 of the ten-way valve B through the electronic pressure controller B, is subjected to back blowing and is emptied, and the sample gas from the ten-way valve; and 6-60 seconds, allowing the hydrogen in the ten-way valve B to pass through the electronic pressure controller C, pass through a 9-hole channel 8 hole channel of the ten-way valve B, reach the precutting column B to carry residual sample gas, perform blowback and venting through a 5-hole channel 4 of a hole channel of the ten-way valve B, allow the other path of hydrogen to pass through the electronic pressure controller B, pass through a 6-hole channel 7 of a hole channel of the ten-way valve B, enter the chromatographic column B to continuously carry the sample gas, enter the FID detector B for combustion, allow the sample gas from the ten-way valve A to pass through a 2-hole channel 3 of the hole channel of the ten-way valve B, enter the quantitative.
7. An analysis method using the multi-component dual-flow analysis apparatus of the logging chromatograph of claim 5, characterized in that:
the rotation of the ten-way valve A and the rotation of the ten-way valve B are controlled by software of a logging chromatograph, and the program setting period is 60 seconds;
the ten-way valve A is switched at 18 seconds in each period, a 0-18 second gas circuit runs through a pore channel 1-2, a pore channel 3-4, a pore channel 5-6, a pore channel 7-8 and a pore channel 9-10, at the moment, hydrogen in the ten-way valve A passes through the electronic pressure controller A, passes through a pore channel 8 of a pore channel 7 of the ten-way valve A, carries sample gas in the quantitative tube A, passes through the pore channel 1 and the pore channel 2 of the ten-way valve A, reaches the pre-cut column A, passes through the pore channel 6 of the pore channel 5, reaches the chromatographic column A, finally enters the FID detector A for combustion, and the sample gas enters the ten-way valve B through the pore channel 9 and the pore channel 10 of the; the gas path is carried out for 18-60 seconds through the pore channel 2-3, the pore channel 4-5, the pore channel 6-7, the pore channel 8-9 and the pore channel 10-1, at the moment, the hydrogen in the ten-way valve A passes through the electronic pressure controller A, passes through the pore channel 7 and the pore channel 6 of the ten-way valve A, reaches the chromatographic column A, continues to carry the sample gas to enter the FID detector A for combustion, and the sample gas enters the quantitative tube A through the pore channel 9 and the pore channel 8 of the ten-way valve A and then enters the ten-way valve B through the pore channel 10 for sample;
the ten-way valve B is switched at 6 seconds in each period, a 0-6 second gas circuit is used for flowing through a pore channel 1-2, a pore channel 3-4, a pore channel 5-6, a pore channel 7-8 and a pore channel 9-10, at the moment, hydrogen in the ten-way valve B passes through the electronic pressure controller C, passes through the pore channel 9 and the pore channel 10 of the ten-way valve B, carries sample gas in the quantitative pipe B, reaches the pre-cut column B through the pore channel 4 of the ten-way valve B, reaches the chromatographic column B through the pore channel 7 of the pore channel 8, finally enters the FID detector B for combustion, the other path of hydrogen reaches the pore channel 5 of the pore channel 6 of the ten-way valve B through the electronic pressure controller B, is subjected to back blowing and is emptied, and the sample gas from the ten-way valve; and 6-60 seconds, allowing the hydrogen in the ten-way valve B to pass through the electronic pressure controller C, pass through a 9-hole channel 8 hole channel of the ten-way valve B, reach the precutting column B to carry residual sample gas, perform blowback and venting through a 5-hole channel 4 of a hole channel of the ten-way valve B, allow the other path of hydrogen to pass through the electronic pressure controller B, pass through a 6-hole channel 7 of a hole channel of the ten-way valve B, enter the chromatographic column B to continuously carry the sample gas, enter the FID detector B for combustion, allow the sample gas from the ten-way valve A to pass through a 2-hole channel 3 of the hole channel of the ten-way valve B, enter the quantitative.
Technical Field
The invention relates to a logging field analytical instrument field in oil and gas exploration and development, in particular to a multi-component double-flow-path analytical device and an analytical method for a logging chromatograph, which can realize the analysis of 12 components such as C1-C8 and the like, and improve the detection range and the analytical period of the chromatograph.
Background
During drilling, fluids in the drilled formation enter the wellbore in various ways, returning to the surface as the drilling fluid passes up. Gas chromatographs used in situ gas logging are used primarily to analyze the gas released from formations returning to the surface above the drilling fluid. Under surface conditions, the formation gas mainly comprises hydrocarbon gas (C1-C8) and non-hydrocarbon gas (carbon dioxide, hydrogen sulfide and the like), and the gas characterizes the oil, gas and water contained in the formation. Therefore, the method is a very important key technology and means in comprehensive logging for detecting and analyzing the formation gas.
The existing detection means mainly relies on a gas chromatograph to detect hydrocarbon gas on the ground. The gas chromatograph consists of a gas path system, a sample introduction system, a chromatographic column, a detector and a recorder.
The Detector is one of the key components of the gas chromatograph, and a common logging gas chromatograph mainly uses a Flame Ionization Detector (FID), where the FID is a Detector that uses hydrogen Flame as an Ionization source to ionize organic matters to generate micro-current and respond, and the generated micro-current is in direct proportion to the concentration of the organic matters.
At present, components (methane, ethane, propane, isobutane, n-butane, isopentane and n-pentane) can be detected by a logging gas chromatograph component analysis system, the detection of the component content is mainly to evaluate a hydrocarbon reservoir, the component analysis of higher C6-C8 cannot be finished, and the component analysis is not enough in the aspect of finding the hydrocarbon reservoir in the better evaluation of hydrocarbon display. In addition, the period of domestic chromatographic analysis C1-C8 is commonly between 150 seconds and 180 seconds, and the hydrocarbon analysis period is too long due to the improvement of drilling technology.
Disclosure of Invention
The invention aims to provide a multi-component double-flow analysis device and an analysis method of a logging chromatograph, which can analyze each component of natural gas more quickly and accurately, aiming at the defects of the existing multi-component detection device of the logging chromatograph. The device not only can effectively separate components such as C1-C8, but also shortens the operation analysis period, enlarges the multi-component analysis range of the logging gas chromatograph, and simultaneously reduces the operation of the logging chromatograph.
The object of the invention can be achieved by the following technical measures:
the multi-component double-flow-path analysis device of the logging chromatograph comprises a logging chromatograph unit, wherein the logging chromatograph unit is connected with a chromatographic column, a pre-cut column, a ten-way valve system, a quantitative pipe and a FID detector through pipelines, and the ten-way valve system comprises a ten-way valve, a driving mechanism and a control system. Wherein: the ten-way valve is a rotary valve with 1-10 pore channels uniformly distributed on the cylindrical valve body, and two adjacent pore channels can be communicated; the logging chromatograph multi-component double-flow-path analysis device is of a combined structure formed by two groups of logging chromatograph units A and B, wherein the logging chromatograph units A are connected in a manner that: the quantitative tube A is connected between a pore channel 1 and a pore channel 8 of the ten-way valve A, the precutting column A is connected between
The above scheme further comprises:
and the driving mechanism of the ten-way valve system is a ten-way valve driving cylinder.
And the pressure controller A of the logging chromatograph unit A and the pressure controllers B and C of the logging chromatograph unit B provide carrier gas power for sample gas by connecting a hydrogen gas path.
And the pressure controller A, the pressure controllers B and C are all electronic pressure controllers.
The quantitative tubes A and B are a section of hollow stainless steel pipeline with a volume of 100 uL.
The technical scheme of the invention also comprises:
the analysis method based on the multi-component double-flow-path analysis device of the logging chromatograph comprises the following steps:
the rotation of the ten-way valve A and the rotation of the ten-way valve B are controlled by logging chromatograph software, and the program setting period is 60 seconds;
the ten-way valve A is switched at 18 seconds in each period, a 0-18 second gas circuit runs through a pore channel 1-2, a pore channel 3-4, a pore channel 5-6, a pore channel 7-8 and a pore channel 9-10, at the moment, hydrogen in the ten-way valve A passes through the electronic pressure controller A, passes through a pore channel 8 of a pore channel 7 of the ten-way valve A, carries sample gas in the quantitative tube A, passes through the pore channel 1 and the pore channel 2 of the ten-way valve A, reaches the pre-cut column A, passes through the
the ten-way valve B is switched at 6 seconds in each period, a 0-6 second gas circuit is used for flowing through a pore channel 1-2, a pore channel 3-4, a pore channel 5-6, a pore channel 7-8 and a pore channel 9-10, at the moment, hydrogen in the ten-way valve B passes through the electronic pressure controller C, passes through the pore channel 9 and the
The technical scheme of the invention realizes the change of the gas path flow and the rapid separation and rapid detection of hydrocarbon components by the double ten-way valve, the double quantitative tubes, the double sets of chromatographic columns and the FID detector. The ten-way valve is a rotary valve with 10 holes, so that the purpose of changing the gas path flow is achieved; the driving cylinder takes air as power gas, and the ten-way valve can rotate by a certain angle, so that two adjacent holes are communicated or not communicated; the rotation of the ten-way valve is controlled by the software of the chromatograph workstation; the quantitative tube is used for storing hydrocarbon sample gas, and when carrier gas flows through the quantitative tube, the carrier gas carries a certain volume of sample gas to enter the chromatographic column and finally enters the FID detector for analysis; hydrogen is used as carrier gas carrying sample gas, one path of hydrogen gas path is connected with a ten-way valve A through pressure stabilization, the carried sample gas enters a chromatographic column A and finally enters a FID detector (back); the other path of hydrogen gas path is connected with a ten-way valve B, carries the sample gas to enter a chromatographic column B and finally enters an FID detector (front); the sample gas is gas generated from the drilling fluid to be detected; the electronic pressure controllers respectively control the pressure of the three paths of hydrogen.
The multi-component double-flow-path analysis device of the logging chromatograph improves the detection range, so that the detection range of the FID of the logging gas chromatograph reaches C8; meanwhile, the multi-component analysis running period is shortened and reaches 60 seconds; the requirements of the current situation of logging are completely met.
Drawings
Fig. 1 is a schematic diagram of the application flow of the multi-component dual-flow analysis device of the logging chromatograph.
Detailed Description
In order to make the features and advantages of the multi-component dual-flow analysis apparatus for a logging chromatograph of the present invention more comprehensible, the following description is given by way of example and with reference to the accompanying drawings.
As shown in fig. 1, a multi-component dual-flow analysis device for a logging chromatograph includes chromatographic columns a and B, precut columns a and B, ten-way valve systems a and B, quantitative tubes a and B, and logging chromatograph units a and B in which FID detectors a and B are connected through pipelines, where the ten-way valve systems a and B include ten-way valves a and B, driving mechanisms a and B, and a control system (not shown in the figure), respectively.
Wherein: the ten-way valves A and B are rotary valves with 1-10 pore channels uniformly distributed on the cylindrical valve body, and the adjacent two pore channels can be communicated and blocked under the control of a control system and a driving mechanism.
The multi-component double-flow-path analysis device of the logging chromatograph is a combined structure formed by two groups of logging chromatograph units A and B.
The connection relation of the logging chromatograph unit A is as follows: the quantitative tube A is connected between a pore channel 1 and a pore channel 8 of the ten-way valve A, the precutting column A is connected between
The connection relation of the well chromatograph unit B is as follows: the quantitative pipe B is connected between a pore channel 3 and a
Further:
the driving mechanisms A and B of the ten-way valve systems A and B are ten-way valve driving cylinders.
The pressure controller A of the logging chromatograph unit A and the pressure controllers B and C of the logging chromatograph unit B provide carrier gas power for sample gas by connecting a hydrogen gas path.
The pressure controller a, the pressure controllers B and C are all Electronic Pressure Controllers (EPC).
The dosing tubes a and B are a section of hollow stainless steel tubing with a volume of 100 uL.
The analysis method of the multi-component double-flow analysis device of the logging chromatograph comprises the following steps:
the rotation of the ten-way valves a and B is controlled by the software of the chromatograph workstation, with a programmed cycle of 60 seconds.
The ten-way valve A is switched at 18 seconds of each period, the gas circuit of 0-18 seconds runs on a dotted line (a dotted line part of a connecting line between the pipelines in the figure, the same below), and the gas circuit of 18-60 seconds runs on a solid line (a solid line part of a connecting line between the pipelines in the figure, the same below). The ten-way valve B is switched at 6 seconds in each period, the gas path of 0-6 seconds is a broken line, and the gas path of 6-60 seconds is a solid line.
After 0-18 seconds, the gas path in the ten-way valve A is broken, the hydrogen passes through the EPCA, passes through the 7 pore channels and 8 pore channels of the ten-way valve A, carries the sample gas in the quantitative tube A, passes through the pore channel 1 and the pore channel 2 of the ten-way valve A, reaches the pre-cut column A, passes through the
After the gas path in the ten-way valve A is full, the hydrogen passes through the EPCA and the pore channel 7 6 of the ten-way valve A, and then reaches the chromatographic column A to continuously carry the sample gas to enter the FID detector A for combustion after 18-60 seconds; the sample gas enters the quantitative pipe A through a pore passage 9 and a pore passage 8 of the ten-way valve A and then enters the ten-way valve B through a
After 0-6 seconds, the gas path in the ten-way valve B is broken, the hydrogen passes through the EPCC, passes through a pore channel 9 and a
6-60 seconds, the gas path in the ten-way valve B is full, hydrogen passes through the EPCC, passes through the 9 pore channels and 8 pore channels of the ten-way valve B, reaches the precutting column B to carry residual sample gas, and is subjected to back blowing and emptying through the 5 pore channels and 4 pore channels of the ten-way valve B; the other path of hydrogen enters a chromatographic column B through an EPCB through a