CN116068114A - Device system for alternately and rapidly analyzing continuous light hydrocarbon in logging and analysis method thereof - Google Patents
Device system for alternately and rapidly analyzing continuous light hydrocarbon in logging and analysis method thereof Download PDFInfo
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- 238000004458 analytical method Methods 0.000 title claims abstract description 185
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 57
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 57
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- 238000000926 separation method Methods 0.000 claims abstract description 47
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- 238000012545 processing Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 23
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- 238000011088 calibration curve Methods 0.000 claims description 3
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- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 abstract description 15
- 238000011156 evaluation Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 6
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 3
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- 229910001220 stainless steel Inorganic materials 0.000 description 3
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- 238000012360 testing method Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000004868 gas analysis Methods 0.000 description 1
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- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
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Abstract
The invention provides a device system for alternately and rapidly analyzing continuous light hydrocarbons in a well logging and an analysis method thereof. The analysis method comprises the following steps: (1) The sample gas is conveyed to a light hydrocarbon analysis unit by a sample conveying unit; (2) C1-C5 components are subjected to component analysis in a C1-C5 analysis unit to obtain C1-C5 component data; (3) C6-C8 components are subjected to component analysis in a C6-C8 analysis unit to obtain C6-C8 component data; (4) And splicing and integrating the C1-C5 component data and the C6-C8 component data to obtain the C1-C8 component data. The analysis method provided by the invention shortens the analysis period of the C1-C8 light hydrocarbon gas, improves the separation degree of benzene and cyclohexane components, and perfects the attribute division of stratum fluid, the recognition of oil gas and water and the evaluation of the biological oxidation degradation degree of an oil layer in oil gas exploration.
Description
Technical Field
The invention belongs to the technical field of petroleum logging gas analysis, relates to a device system for logging continuous light hydrocarbon analysis, and particularly relates to a device system for logging continuous light hydrocarbon alternating rapid analysis and an analysis method thereof.
Background
In petroleum drilling sites, gas logging typically uses a gas chromatograph to analyze hydrocarbon gases separated from drilling fluid to determine hydrocarbon bearing intervals. With deep exploration and development, exploration targets gradually change to complex oil and gas reservoirs, the oil and water relationship of the oil and gas reservoirs is higher, and meanwhile, with the popularization and application of novel drilling processes such as PDC drill bit, screw composite drilling, high-inclination well, horizontal well and the like, the 'dessert' reservoir is rapidly identified in the high-speed drilling process, potential oil and gas reservoirs are accurately evaluated, the water content of the reservoir is identified, and the problem to be solved in each large oil field is solved.
Conventional gas logging techniques are capable of providing real-time, continuous C1-C5 parameters, but with a small number of parameters, lacking in water-and oil-bearing indication parameters; the laboratory light hydrocarbon analysis needs manual fixed-point sampling, and the analysis result is also easily affected by links such as transportation, so that the analysis result is discontinuous and is unfavorable for on-site rapid decision. In recent years, online light hydrocarbon logging instruments developed by logging companies at home and abroad can continuously analyze C1-C8 parameters on logging sites, but the analysis period is relatively long, generally more than 120 seconds, and the separation of benzene and cyclohexane components is incomplete, so that the requirements of thin-layer oil-gas-water identification and interpretation evaluation under the condition of rapid drilling can not be met gradually.
Therefore, how to provide a device system for rapidly analyzing continuous light hydrocarbons in logging and an analysis method thereof, shorten the analysis period of C1-C8 light hydrocarbon gas and improve the separation degree of benzene and cyclohexane components, thereby effectively perfecting the attribute division of stratum fluid, the identification of oil gas and water and the evaluation of the biological oxidative degradation degree of an oil layer in oil gas exploration, and becoming the urgent problem to be solved by the current technicians in the field.
Disclosure of Invention
The invention aims to provide a device system for alternately and rapidly analyzing continuous light hydrocarbons in well logging and an analysis method thereof, wherein the analysis method shortens the analysis period of C1-C8 light hydrocarbon gas and improves the separation degree of benzene and cyclohexane components, thereby effectively perfecting the attribute division of stratum fluid, the identification of oil, gas and water and the evaluation of the biological oxidation degradation degree of an oil layer in oil and gas exploration.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
in a first aspect, the invention provides a device system for alternately and rapidly analyzing continuous light hydrocarbons in a well logging, which comprises a sample conveying unit, a light hydrocarbon analyzing unit and a data integration module which are sequentially connected.
The light hydrocarbon analysis unit comprises a C1-C5 analysis unit and a C6-C8 analysis unit which are mutually connected in parallel.
The main stream logging gas chromatograph at present can complete analysis of C1-C5 components within 30 seconds, but the analysis period of C6-C8 components is longer and is generally more than 120 seconds, and the device system provided by the invention is based on a mature chromatographic analysis technology, adopts a multichannel chromatographic analysis method, shortens the online analysis period of petroleum light hydrocarbon logging from the original more than 120 seconds to less than 30 seconds, and simultaneously improves the separation degree of benzene and cyclohexane components; through the change relation and derivative parameters among the main 15 components in the C1-C8 hydrocarbon gas, the attribute division of formation fluid, the recognition of oil gas and water and the evaluation of the degree of biological oxidation degradation of an oil layer in oil gas exploration are effectively perfected, and a novel technical means is provided for the on-site rapid evaluation of the degree of flooding of an oil-water interface, the recognition of the gas and water interface and the evaluation of the degree of flooding of a reservoir.
Preferably, the sample delivery unit comprises a sample pump.
Preferably, the sample pump is a vacuum pump for drawing a gas sample to be analyzed from the logging degasser.
Preferably, the C1-C5 analysis unit comprises a first measurement and control module, a C1-C5 separation module, a C1-C5 detector, a full hydrocarbon detector and a C1-C5 signal processing module.
Preferably, the first measurement and control module is sequentially and independently connected to the C1-C5 separation module, the C1-C5 detector and the all hydrocarbon detector.
Preferably, the C1-C5 separation module and the C1-C5 detector are connected in series with each other.
Preferably, the C1-C5 detector and the all-hydrocarbon detector are connected in parallel with each other and are independently connected to the C1-C5 signal processing module, respectively.
Preferably, the C6-C8 analysis unit includes a second measurement and control module and at least 4C 6-C8 analysis channels connected in parallel, for example, 4, 5, 6, 7 or 8 analysis channels, but not limited to the listed values, and other non-listed values in the range of values are equally applicable.
Preferably, each C6-C8 analysis channel independently comprises a C1-C8 separation module, a C1-C8 detector and a C6-C8 signal processing module which are connected in sequence.
Preferably, the second measurement and control module is connected to the C1-C8 separation module and the C1-C8 detector in each C6-C8 analysis channel in turn independently.
Preferably, the sample delivery unit is connected to the C1-C5 separation module, the all hydrocarbon detector, and the C1-C8 separation module in each of the C6-C8 analysis channels independently in sequence.
Preferably, the C1-C5 signal processing module and the C6-C8 signal processing module in each C6-C8 analysis channel are respectively and independently connected with the data integration module.
Preferably, the first measurement and control module and the second measurement and control module respectively and independently comprise a gas pressure control component and a rotary valve switching time control component for hydrogen, air and sample gas.
Preferably, the gas pressure control assembly comprises a metal diaphragm pressure stabilizing valve or an electronic pressure controller, so as to achieve the functions of stabilizing pressure and limiting flow.
Preferably, the rotary valve switching time control assembly comprises a programmable timer.
Preferably, the C1-C5 separation module and the C1-C8 separation module in each C6-C8 analysis channel independently comprise a ten-way valve cylinder, a ten-way valve, a metering tube, a pretreatment column and a main separation column, respectively.
Preferably, the C1-C5 signal processing module and the C6-C8 signal processing module in each C6-C8 analysis channel respectively and independently comprise a collector, an amplifying circuit and a singlechip.
In a second aspect, the present invention provides a method for performing alternating rapid analysis of logging continuous light hydrocarbons using the apparatus system of the first aspect, the method comprising the steps of:
(1) The sample gas is conveyed to a light hydrocarbon analysis unit by a sample conveying unit;
(2) C1-C5 components in the sample gas are subjected to component analysis in a C1-C5 analysis unit to obtain C1-C5 component data;
(3) C6-C8 components in the sample gas are subjected to component analysis in a C6-C8 analysis unit to obtain C6-C8 component data;
(4) And (3) splicing and integrating the C1-C5 component data obtained in the step (2) and the C6-C8 component data obtained in the step (3) by utilizing a data integration module to obtain the C1-C8 component data in the sample gas.
Wherein, the step (2) and the step (3) are simultaneously carried out in the light hydrocarbon analysis unit.
Preferably, the specific process of the step (3) is as follows: setting the analysis period of each C6-C8 analysis channel in the C6-C8 analysis unit to be 120 seconds, firstly, sending a start analysis instruction to the first C6-C8 analysis channel by the control circuit, sending a start analysis instruction to the second C6-C8 analysis channel when 120/n seconds after the first C6-C8 analysis channel starts to analyze, sending a start analysis instruction to the third C6-C8 analysis channel by the control circuit after 120/n seconds of time delay, and so on, starting the nth C6-C8 analysis channel by 120/n seconds than the nth C6-C8 analysis channel until the last C6-C8 analysis channel starts to analyze; wherein n is the total number of C6-C8 analysis channels.
Preferably, in the process of step (3), after each C6-C8 analysis channel receives an analysis starting instruction, the channels operate independently of each other, and after the current signal of each C1-C8 detector is filtered and amplified by the corresponding C6-C8 signal processing module, the current signal is converted into a concentration value of a C6-C8 component according to a calibration curve, and after the analysis of each C6-C8 analysis channel is finished, the analysis of the next period in the channel is started immediately.
Preferably, in the process of step (3), each C6-C8 analysis channel is independently provided with a signal by a programmable timer in the second measurement and control module, drives an electromagnetic valve, controls a ten-way valve in each C1-C8 separation module to switch, respectively enters a sampling and analysis flow, sample gas is separated by the C1-C8 separation module and then enters a C1-C8 detector, the generated electric signal is filtered and amplified by the C6-C8 signal processing module, and then is subjected to software calculation to obtain the concentration value of the C6-C8 component, and the concentration value is transmitted to the data integration module according to the interval of 120/n seconds after being processed by the software.
The method provided by the invention is based on a specific device system, adopts conventional chromatographic analysis of full hydrocarbon and C1-C5 components (the period is 30 seconds), adopts a multichannel parallel and alternative analysis mode of C6-C8 components, and each C6-C8 analysis channel has identical structure and function, and realizes rapid analysis of logging light hydrocarbon gas by continuous sampling, multi-rotary valve linkage, synchronous analysis and data integration of sample gas, so that the analysis period is shortened to 30 seconds or even shorter.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the analysis method provided by the invention, the on-line analysis period of the petroleum light hydrocarbon logging is shortened from the original period of more than 120 seconds to less than 30 seconds, the overall analysis period of C1-C8 components is greatly shortened, the oil-water interface is quickly found on a petroleum drilling site, the oil-gas layer is accurately realized, the reservoir fluidities identification and interpretation capacity in the while-drilling process is effectively improved, the difficult problem of oil-water interface identification of complex oil-gas reservoirs and the difficult problem of oil finding in water of a water flooding block are solved, the basis is provided for optimizing an oil testing scheme, and the technical support is provided for the increase and the production of oil-gas fields;
(2) The device system provided by the invention is based on a mature chromatographic analysis technology, adopts a multichannel chromatographic analysis method, greatly reduces the instrument cost, is simple and easy to maintain, and is convenient to popularize and apply.
Drawings
FIG. 1 is a schematic diagram of a system of a device for the alternating rapid analysis of logging continuous light hydrocarbons provided by the invention;
FIG. 2 is a gas circuit structure diagram of a C1-C5 analysis unit in the device system for alternately and rapidly analyzing continuous light hydrocarbons in a well logging, provided by the invention;
FIG. 3 is a gas circuit structure diagram of each C6-C8 analysis channel in the device system for alternately and rapidly analyzing continuous light hydrocarbons in a well logging, provided by the invention;
fig. 4 is a flow chart of an analysis method provided in application example 1.
Wherein: a 1-ten-way valve cylinder; 2-ten-way valve; 3-metering tube; 4-a pretreatment column; 5-a main separation column; 100-sample delivery unit; 200-a light hydrocarbon analysis unit; 210-C1-C5 analysis unit; 211-a first measurement and control module; 212-C1-C5 separation module; 213-C1-C5 detector; 214-an all hydrocarbon detector; a 215-C1-C5 signal processing module; 220-C6-C8 analysis unit; 221-a second measurement and control module; 222-C1-C8 separation module; 223-C1-C8 detector; 224-C6-C8 signal processing module; 300-data integration module.
Detailed Description
The technical scheme of the invention is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the invention and are not to be construed as a specific limitation thereof.
Example 1
The embodiment provides a device system for alternately and rapidly analyzing continuous light hydrocarbons in a well logging, as shown in fig. 1, the device system comprises a sample conveying unit 100, a light hydrocarbon analyzing unit 200 and a data integration module 300 which are sequentially connected; the light hydrocarbon analysis unit 200 includes a C1-C5 analysis unit 210 and a C6-C8 analysis unit 220 connected in parallel with each other.
In this embodiment, the sample conveying unit 100 is a vacuum pump, and a specific model is an N86KTE diaphragm type sampling pump of KNF pump industry group, germany, and is used for extracting a gas sample to be analyzed from a logging degasser.
As shown in FIG. 1, the C1-C5 analysis unit 210 includes a first measurement and control module 211, a C1-C5 separation module 212, a C1-C5 detector 213, an all hydrocarbon detector 214, and a C1-C5 signal processing module 215; specifically, the first measurement and control module 211 is sequentially and independently connected to the C1-C5 separation module 212, the C1-C5 detector 213 and the all hydrocarbon detector 214 through a circuit and a gas circuit, the C1-C5 separation module 212 and the C1-C5 detector 213 are connected in series, and the C1-C5 detector 213 and the all hydrocarbon detector 214 are connected in parallel and are respectively and independently electrically connected to the C1-C5 signal processing module 215.
As shown in fig. 1, the C6-C8 analysis unit 220 includes a second measurement and control module 221 and 4C 6-C8 analysis channels connected in parallel, each C6-C8 analysis channel includes a C1-C8 separation module 222, a C1-C8 detector 223 and a C6-C8 signal processing module 224 connected in sequence, and the C1-C8 detector 223 and the C6-C8 signal processing module 224 are electrically connected; the second measurement and control module 221 is connected to the C1-C8 separation module 222 and the C1-C8 detector 223 in each C6-C8 analysis channel through circuits and gas paths sequentially and independently.
In this embodiment, the sample delivery unit 100 is sequentially and independently connected to the C1-C5 separation module 212, the all-hydrocarbon detector 214, and the C1-C8 separation module 222 in each of the C6-C8 analysis channels through stainless steel pipes having an outer diameter of 3mm and an inner diameter of 2mm, and the C1-C5 signal processing module 215 and the C6-C8 signal processing module 224 in each of the C6-C8 analysis channels are respectively and independently connected to the data integration module 300 in serial.
As shown in fig. 2 and fig. 3, the first measurement and control module 211 and the second measurement and control module 221 respectively and independently include a gas pressure control component and a rotary valve switching time control component for hydrogen, air and sample gas, wherein the gas pressure control component is a metal diaphragm pressure stabilizing valve, so as to achieve the functions of stabilizing pressure and limiting flow, and the rotary valve switching time control component is a programmable timer; the C1-C5 separation module 212 and the C1-C8 separation module 222 in each C6-C8 analysis channel respectively and independently comprise a ten-way valve cylinder 1, a ten-way valve 2, a quantitative pipe 3, a pretreatment column 4 and a main separation column 5, wherein the ten-way valve cylinder 1 and the ten-way valve 2 are mechanically connected by adopting shaft transmission, and the quantitative pipe 3, the pretreatment column 4, the main separation column 5 and the ten-way valve 2 are connected by adopting gas paths; the C1-C5 signal processing module 215 and the C6-C8 signal processing module 224 in each C6-C8 analysis channel independently comprise a collector, an amplifying circuit and a single chip microcomputer, respectively.
As shown in fig. 2, in the C1-C5 analysis unit 210, the ten-way valve cylinder 1 is an a36 type cylinder of Valco instruments in usa, the ten-way valve 2 is a DC10WE type ten-way valve of Valco instruments in usa, the quantitative tube 3 is a 1/16 "stainless steel tube with a volume of 250 μl, the pretreatment column 4 is a packed column with a length of 0.5m and an outer diameter of 1/8", and the main separation column 5 is a packed column with a length of 2.5m and an outer diameter of 1/8'; the C1-C5 detector 213 and the all hydrocarbon detector 214 are each independently selected from a thermal conductivity detector TCD.
As shown in fig. 3, in each C6-C8 analysis channel, the ten-way valve cylinder 1 and the ten-way valve 2 are ELDV-10-NP integrated installed diaphragm ten-way valves of AFP company, canada, the quantitative tube 3 is a 1/16 "stainless steel tube with a volume of 100 μl, and the pretreatment column 4 and the main separation column 5 are capillary chromatographic columns respectively and independently; the C1-C8 detector 223 is a hydrogen flame detector FID.
Example 2
The present embodiment provides a device system for alternatively and rapidly analyzing continuous light hydrocarbons in logging, and the device system changes the number of C6-C8 analysis channels in the C6-C8 analysis unit 220 to 5, and other structures and conditions are adaptively adjusted based on the embodiment 1, so that details are not repeated herein.
Example 3
The present embodiment provides a device system for alternatively and rapidly analyzing continuous light hydrocarbons in logging, and the device system changes the number of C6-C8 analysis channels in the C6-C8 analysis unit 220 to 6, and other structures and conditions are adaptively adjusted based on embodiment 1, so that details are not repeated herein.
Application example 1
The application example applies the device system provided in the embodiment 1 to perform the alternating rapid analysis of the continuous light hydrocarbon of the logging, and the analysis method comprises the following steps:
(1) The sample gas is conveyed to the light hydrocarbon analysis unit 200 by the sample conveying unit 100;
(2) C1-C5 components in the sample gas are subjected to component analysis in a C1-C5 analysis unit 210 to obtain C1-C5 component data;
(3) C6-C8 components in the sample gas are subjected to component analysis in a C6-C8 analysis unit 220 to obtain C6-C8 component data;
(4) Utilizing a data integration module 300 to splice and integrate the C1-C5 component data obtained in the step (2) and the C6-C8 component data obtained in the step (3) to obtain the C1-C8 component data in the sample gas;
wherein, the step (2) and the step (3) are performed simultaneously in the light hydrocarbon analysis unit 200.
As shown in fig. 4, the specific process of step (3) is as follows: setting the analysis period of each C6-C8 analysis channel in the C6-C8 analysis unit 220 to be 120 seconds, firstly, sending a start analysis instruction to a first C6-C8 analysis channel by a control circuit, and sending a start analysis instruction to a second C6-C8 analysis channel by the control circuit 30 seconds after the first C6-C8 analysis channel starts to analyze; when 60 seconds after the first C6-C8 analysis channel starts to analyze, the control circuit sends an analysis starting instruction to the third C6-C8 analysis channel; and when 90 seconds after the first C6-C8 analysis channel starts to analyze, the control circuit sends an analysis starting instruction to the fourth C6-C8 analysis channel. The 4C 6-C8 analysis channels output analysis results once every 120 seconds, and time differences of 30 seconds are sequentially arranged, so that after software integration data is carried out from the 120 th second, a group of C6-C8 analysis data can be output every 30 seconds; combining step (2) and step (4), a set of C1-C5 and C6-C8 analysis results is output every 30 seconds from the 120 th second after the start of the analysis.
In the above process, when each C6-C8 analysis channel receives the start analysis command, the channels operate independently of each other, and after the current signal of each C1-C8 detector 223 is filtered and amplified by the corresponding C6-C8 signal processing module 224, the current signal is converted into the concentration value of the C6-C8 component according to the calibration curve, and after the analysis of each C6-C8 analysis channel is finished, the analysis of the next period in the channel is started immediately; each C6-C8 analysis channel is independently provided with a signal by a programmable timer in the second measurement and control module 221, drives an electromagnetic valve, controls the switching of the ten-way valve 2 in each C1-C8 separation module 222, respectively enters a sampling and analysis flow, separates sample gas by the C1-C8 separation module 222, enters the C1-C8 detector 223, amplifies generated electric signals by filtering of the C6-C8 signal processing module 224, calculates concentration values of C6-C8 components by software, and transmits the concentration values to the data integration module 300 at intervals of 30 seconds after being processed by the software.
Application example 2
The device system provided in the application example 2 is used for carrying out the alternating rapid analysis of the continuous light hydrocarbon of the logging, the steps of the analysis method are the same as those of the application example 1, and a group of C1-C5 and C6-C8 analysis results can be output every 24 seconds.
Application example 3
The device system provided in the application example 3 is used for carrying out the alternating rapid analysis of the continuous light hydrocarbon of the logging, the steps of the analysis method are the same as those of the application example 1, and a group of C1-C5 and C6-C8 analysis results are output every 20 seconds.
Therefore, the analysis method provided by the invention shortens the online analysis period of the petroleum light hydrocarbon logging from the original period of more than 120 seconds to less than 30 seconds, greatly shortens the overall analysis period of the C1-C8 components, realizes the rapid discovery of an oil-water interface on a petroleum drilling site, accurately realizes the oil-gas layer, effectively improves the capability of reservoir fluid identification and interpretation in the process of drilling, solves the difficult problem of oil-water interface identification of complex oil-gas reservoirs and the difficult problem of oil finding in water of a water flooding block, provides a basis for optimizing an oil testing scheme, and provides technical support for the increase of storage and upper yield of an oil-gas field; in addition, the device system provided by the invention is based on a mature chromatographic analysis technology, adopts a multichannel chromatographic analysis method, greatly reduces the instrument cost, is simple and easy to maintain, and is convenient to popularize and apply.
The applicant declares that the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present invention disclosed by the present invention fall within the scope of the present invention and the disclosure.
Claims (10)
1. The device system for the alternating rapid analysis of the continuous light hydrocarbon of the logging is characterized by comprising a sample conveying unit, a light hydrocarbon analysis unit and a data integration module which are sequentially connected;
the light hydrocarbon analysis unit comprises a C1-C5 analysis unit and a C6-C8 analysis unit which are mutually connected in parallel.
2. The device system of claim 1, wherein the sample delivery unit comprises a sample pump;
preferably, the sample pump is a vacuum pump.
3. The plant system according to claim 1 or 2, wherein the C1-C5 analysis unit comprises a first measurement and control module, a C1-C5 separation module, a C1-C5 detector, a full hydrocarbon detector, and a C1-C5 signal processing module;
preferably, the first measurement and control module is sequentially and independently connected with the C1-C5 separation module, the C1-C5 detector and the all-hydrocarbon detector;
preferably, the C1-C5 separation module and the C1-C5 detector are connected in series with each other;
preferably, the C1-C5 detector and the all-hydrocarbon detector are connected in parallel with each other and are independently connected to the C1-C5 signal processing module, respectively.
4. The device system of claim 3, wherein the C6-C8 analysis unit comprises a second measurement and control module and at least 4C 6-C8 analysis channels connected in parallel with each other;
preferably, each C6-C8 analysis channel independently comprises a C1-C8 separation module, a C1-C8 detector and a C6-C8 signal processing module which are sequentially connected;
preferably, the second measurement and control module is connected to the C1-C8 separation module and the C1-C8 detector in each C6-C8 analysis channel in turn independently.
5. The device system of claim 4, wherein the sample delivery unit is connected to the C1-C5 separation module, the all hydrocarbon detector, and the C1-C8 separation module in each C6-C8 analysis channel independently in sequence;
preferably, the C1-C5 signal processing module and the C6-C8 signal processing module in each C6-C8 analysis channel are respectively and independently connected with the data integration module.
6. The device system of claim 4 or 5, wherein the first and second measurement and control modules independently comprise a gas pressure control assembly and a rotary valve switching time control assembly for hydrogen, air, sample gas, respectively;
preferably, the gas pressure control assembly comprises a metal diaphragm regulator valve or an electronic pressure controller;
preferably, the rotary valve switching time control assembly comprises a programmable timer;
preferably, the C1-C5 separation module and the C1-C8 separation module in each C6-C8 analysis channel independently comprise a ten-way valve cylinder, a ten-way valve, a metering tube, a pretreatment column and a main separation column;
preferably, the C1-C5 signal processing module and the C6-C8 signal processing module in each C6-C8 analysis channel respectively and independently comprise a collector, an amplifying circuit and a singlechip.
7. A method for performing alternating rapid analysis of logging continuous light hydrocarbons using a system of devices according to any one of claims 1 to 6, said method comprising the steps of:
(1) The sample gas is conveyed to a light hydrocarbon analysis unit by a sample conveying unit;
(2) C1-C5 components in the sample gas are subjected to component analysis in a C1-C5 analysis unit to obtain C1-C5 component data;
(3) C6-C8 components in the sample gas are subjected to component analysis in a C6-C8 analysis unit to obtain C6-C8 component data;
(4) Utilizing a data integration module to splice and integrate the C1-C5 component data obtained in the step (2) and the C6-C8 component data obtained in the step (3) to obtain the C1-C8 component data in the sample gas;
wherein, the step (2) and the step (3) are simultaneously carried out in the light hydrocarbon analysis unit.
8. The method of claim 7, wherein the specific process of step (3) is: setting the analysis period of each C6-C8 analysis channel in the C6-C8 analysis unit to be 120 seconds, firstly, sending a start analysis instruction to the first C6-C8 analysis channel by the control circuit, sending a start analysis instruction to the second C6-C8 analysis channel when 120/n seconds after the first C6-C8 analysis channel starts to analyze, sending a start analysis instruction to the third C6-C8 analysis channel by the control circuit after 120/n seconds of time delay, and so on, starting the nth C6-C8 analysis channel by 120/n seconds than the nth C6-C8 analysis channel until the last C6-C8 analysis channel starts to analyze; wherein n is the total number of C6-C8 analysis channels.
9. The method of claim 8, wherein step (3) is performed in such a manner that, when each of the C6-C8 analysis channels receives an analysis start command, the channels operate independently of each other, the current signal of each of the C1-C8 detectors is filtered and amplified by the corresponding C6-C8 signal processing module, and is converted into a concentration value of the C6-C8 component according to the calibration curve, and the analysis of the next cycle in the channel is started immediately after the analysis of each of the C6-C8 analysis channels is completed.
10. The method according to claim 8 or 9, wherein in the step (3), in the process of performing, each C6-C8 analysis channel is independently provided with a signal by a programmable timer in the second measurement and control module, drives an electromagnetic valve, controls a switching of a ten-way valve in each C1-C8 separation module, respectively enters a sampling and analysis flow, separates sample gas by the C1-C8 separation module, enters a C1-C8 detector, filters and amplifies generated electric signals by the C6-C8 signal processing module, calculates concentration values of C6-C8 components by software, and transmits the concentration values to the data integration module at intervals of 120/n seconds after being processed by the software.
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