CN108267434B - In-situ fluorescence observation device for hydrocarbon source rock hydrocarbon production process for indicating maturity of oil inclusion - Google Patents
In-situ fluorescence observation device for hydrocarbon source rock hydrocarbon production process for indicating maturity of oil inclusion Download PDFInfo
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- CN108267434B CN108267434B CN201810117458.3A CN201810117458A CN108267434B CN 108267434 B CN108267434 B CN 108267434B CN 201810117458 A CN201810117458 A CN 201810117458A CN 108267434 B CN108267434 B CN 108267434B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N2021/6417—Spectrofluorimetric devices
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Abstract
The application provides an in-situ fluorescence observation device for a hydrocarbon source rock hydrocarbon production process for indicating the maturity of an oil inclusion, which comprises a water tank, a hand pump, a reaction kettle, a water cooling container, a collector and an optical fiber detection device, wherein the collector is positioned in the water cooling container and is connected with the optical fiber detection device, the reaction kettle comprises a heat insulation layer and a kettle body, a heater is arranged between the heat insulation layer and the kettle body, a liquid discharge hole is formed in the top end of the kettle body and is communicated with a water inlet of the collector, mudstone is placed in the kettle body, the water in the water tank is respectively injected into the kettle body and the collector through the hand pump, the heater heats the kettle body, the temperature of the kettle body is transferred to water in the kettle body after being heated, the water in the kettle body is heated, the mudstone generates crude oil, when the pressure in the collector is smaller than the pressure in the kettle body, the crude oil enters the collector through the liquid discharge hole and the water inlet of the collector, and the fluorescence spectrum of the crude oil is measured through the optical fiber detection device. The device provided by the application has the advantages of simple structure, simplicity and convenience in operation and accurate measurement result.
Description
Technical Field
The application relates to the technical field of hydrocarbon generation simulation devices, in particular to an in-situ fluorescence observation device for a hydrocarbon source rock hydrocarbon generation process for indicating the maturity of an oil inclusion.
Background
The relationship between the fluorescence color and the maturity of the oil inclusion is an important precondition for the research of oil and gas reservoir formation by utilizing the oil inclusion. It is generally believed that the yellow fluorescent oil inclusion maturity is lower than the blue fluorescent oil inclusion maturity, and as the oil inclusion maturity increases, the oil inclusion fluorescent color shifts in the shortwave direction, i.e. "blue shift", and conversely "red shift". However, there has been a controversy over the relationship of oil inclusion fluorescence color to its maturity, and there has been no suggestion to date of using oil inclusion fluorescence characteristics to indicate whether inclusion oil maturity is reliable.
The fluorescent evolution of crude oil in the process of simulating the hydrocarbon source rock crude oil can indirectly verify the relationship between the fluorescent color change of the generated oil and the thermal maturity of the generated oil. Although conventional hydrocarbon generation simulation methods verify that the fluorescence color of crude oil blue shifts as maturity increases. However, the current methods have obvious drawbacks, such as the absence of pressure changes during hydrocarbon generation simulation, loss of light components of the generated oil, detection of the fluorescence color of kerogen, and inability to observe the fluorescence color of the generated oil in situ. These defects result in that the fluorescent color of the produced oil still cannot be obtained effectively by the conventional hydrocarbon production simulation method, and components are lost during sampling due to sampling test fluorescence, so that the extracted oil cannot be ensured to be consistent with the components of the actually produced oil, and the fluorescent characteristics obtained by the conventional hydrocarbon production simulation experiment are greatly different from those of the actually produced oil.
Disclosure of Invention
In view of this, the present application provides an in situ fluorescence observation device for hydrocarbon source rock hydrocarbon production processes that indicates oil inclusion maturity without requiring sampling.
The application provides an in-situ fluorescence observation device for a hydrocarbon source rock hydrocarbon production process for indicating the maturity of an oil inclusion, which comprises a water tank, a hand pump, a reaction kettle, a water cooling container, a collector and an optical fiber detection device, wherein water is filled in the water tank, the water cooling container is of a hollow structure, water is filled in the water cooling container, the collector is positioned in the water cooling container, the collector is connected with the optical fiber detection device, the reaction kettle comprises a heat preservation layer and a kettle body, a heater is arranged between the heat preservation layer and the kettle body, a water inlet pipe of the hand pump is connected with a water outlet of the water tank, a water outlet pipe of the hand pump is respectively connected with a water inlet of the collector and a water inlet of the kettle body, a drain hole is formed in the top end of the kettle body, the drain hole is communicated with a water inlet of the collector, mudstone is placed in the kettle body, water in the water tank is filled into the kettle body and the collector through the hand pump, the heater heats the kettle body, the temperature is transferred to the water in the kettle body after the kettle body is heated, the water in the kettle body after the water is heated, the mudstone generates temperature rise, and when the pressure in the collector is smaller than the pressure in the kettle body, the water pump and the raw oil enters the water liquid phase under the action of the water cooling container through the water pump, and the water cooling device under the action of the water cooling device, and the effect of the fluorescence detection device is cooled down by the water in the water tank, and the temperature in the water tank is cooled by the water tank.
Further, the upper end of the collector is transparent and visible, the optical fiber detection device comprises an optical fiber fluorescent probe, an ultraviolet excitation light source and a fluorescence spectrometer, the optical fiber fluorescent probe is connected to the upper end of the collector, the optical fiber fluorescent probe is connected with the ultraviolet excitation light source and the fluorescence spectrometer through optical fibers, ultraviolet light emitted by the ultraviolet excitation light source is received by the optical fiber fluorescent probe through the upper end of the collector, the optical fiber fluorescent probe irradiates ultraviolet light onto crude oil in the collector after receiving the ultraviolet light, meanwhile, the optical fiber fluorescent probe receives fluorescence excited by the crude oil, and the fluorescence spectrometer acquires fluorescence spectrum of the crude oil according to the fluorescence excited by the crude oil.
Further, the collector is of a cone structure with a narrow upper part and a wide lower part, a first through hole is formed in the upper end of the water cooling container, the shape of the first through hole is matched with that of the upper end of the collector, and the upper end of the collector is connected with the upper end of the water cooling container.
Further, a temperature sensor is arranged on the heater and connected with a first thermometer, the temperature sensor measures the temperature of the heater and sends the measured temperature to the first thermometer, and the first thermometer indicates the temperature of the heater.
Further, the outlet pipe of hand pump connects first branch pipe and second branch pipe, the water inlet of collector is connected to the delivery port of first branch pipe, the water inlet setting of collector is in the bottom of collector, the water inlet of cauldron body is connected to the delivery port of second branch pipe.
Further, the upper end of the collector is provided with a fourth through hole, the fourth through hole is connected with a fourth pipeline, and crude oil in the collector is discharged through the fourth through hole and the fourth pipeline.
Further, a third through hole is formed in the lower end of the water cooling container, the third through hole is connected with the second pipeline, and water in the water cooling container is discharged through the third through hole and the second pipeline.
Further, a temperature measuring probe is arranged in the kettle body and is connected with a second thermometer, the temperature measuring probe measures the temperature in the kettle body and sends the measured temperature to the second thermometer, and the second thermometer indicates the temperature in the kettle body.
Further, a second through hole is formed in the side face of the water cooling container, the second through hole is connected with the first pipeline, a water inlet of the first pipeline is connected with the water storage tank, water is contained in the water storage tank, and water in the water storage tank flows into the water cooling container through the first pipeline and the second through hole.
Further, a first pressure gauge is arranged on the first branch pipe and used for measuring and indicating the pressure in the collector, and a second pressure gauge is arranged on the second branch pipe and used for measuring and indicating the pressure in the kettle body.
The technical scheme provided by the application has the beneficial effects that: the device provided by the application has the advantages of simple structure and simplicity and convenience in operation; according to the application, the optical fiber detection device is directly connected with the collector, so that the fluorescence spectrum testing process of crude oil can be performed without sampling, and the fluorescence of the tested crude oil can be greatly ensured to truly reflect the fluorescence characteristics of the oil originally generated by the hydrocarbon source rock; the device provided by the application can reduce the temperature of crude oil by utilizing the water cooling container and the hand pump, can provide higher pressure, and effectively avoids gas-liquid separation of crude oil; the device provided by the application can simulate the process of crude oil generation, discharge and accumulation in an oil reservoir.
Drawings
FIG. 1 is a schematic structural diagram of an in situ fluorescence observation device for hydrocarbon source rock hydrocarbon production process, which indicates the maturity of an oil inclusion.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the application provides an in-situ fluorescence observation device for a hydrocarbon source rock hydrocarbon production process for indicating the maturity of an oil inclusion, which comprises a water tank 1, a hand pump 2, a reaction kettle 3, a water cooling container 4, a collector 5, an optical fiber detection device 6 and a water storage tank 7, wherein water is filled in the water tank 1 and the water storage tank 7, the optical fiber detection device 6 is used for detecting the fluorescence spectrum of crude oil, the optical fiber detection device 6 comprises an optical fiber fluorescence probe 61, an ultraviolet excitation light source 62 and a fluorescence spectrometer 63, the optical fiber fluorescence probe 61 is connected with the ultraviolet excitation light source 62 and the fluorescence spectrometer 63 through an optical fiber 64, the reaction kettle 3 comprises a heat preservation layer 31 and a kettle body 32, the water cooling container 4 is of a hollow structure, the water cooling container 4 is positioned below the water storage tank 7, water is filled into the water cooling container 4 through the water storage tank 7, the collector 5 is positioned in the water cooling container 4, and the collector 5 is connected with the optical fiber detection device 6.
The water inlet pipe 21 of hand pump 2 connects the delivery port of water tank 1, and first branch pipe 221 and second branch pipe 222 are connected to the outlet pipe 22 of hand pump 2, and the water inlet of collector 5 is connected to the delivery port of first branch pipe 221, and the water inlet of collector 5 sets up in the bottom of collector 5, and the water inlet of cauldron body 32 is connected to the delivery port of second branch pipe 222, can pour into collector 5 and cauldron body 32 with the water in the water tank 1 through hand pump 2.
A heater 33 is arranged between the heat preservation layer 31 and the kettle body 32, the heater 33 is used for heating the kettle body 32, the heat preservation layer 31 plays a role in heat preservation, a temperature sensor 34 is arranged on the heater 33, the temperature sensor 34 is connected with a first thermometer 341, the temperature sensor 34 measures the temperature of the heater 33 and sends the measured temperature to the first thermometer 341, the first thermometer 341 indicates the temperature of the heater 33, the kettle body 32 is of a cone structure with a narrow upper part and a wide lower part, a drain hole 321 is arranged at the top end of the kettle body 32, a temperature measuring probe 322 is arranged in the kettle body 32, the temperature measuring probe 322 is connected with a second thermometer 323, the temperature measuring probe 322 is used for measuring the temperature in the kettle body 32 and sends the measured temperature to the second thermometer 323, and the second thermometer 323 indicates the temperature in the kettle body 32; in one embodiment, the heater 33 is a resistive heater, the diameter of the bottom surface of the kettle 32 is 50cm, and the height of the kettle 32 is 80cm.
The upper end of the water cooling container 4 is provided with a first through hole 41, the side surface of the water cooling container 4 is provided with a second through hole 42, the second through hole 42 is connected with a first pipeline 421, the water inlet of the first pipeline 421 is connected with the water outlet of the water storage tank 7, under the action of gravity, water in the water storage tank 7 flows into the water cooling container 4 through the first pipeline 421 and the second through hole 42, the lower end of the water cooling container 4 is provided with a third through hole 43, the third through hole 43 is connected with a second pipeline 431, water in the water cooling container 4 is discharged through the third through hole 43 and the second pipeline 431, and water in the water cooling container 4 enters and exits from top to bottom to form a cold cycle.
The collector 5 is of a cone structure with a narrow upper part and a wide lower part, the water inlet of the collector 5 is communicated with the liquid discharge hole 321 at the top end of the kettle body 32 through a third pipeline 35, the upper end of the collector 5 is transparent and visible, the shape of the upper end of the collector 5 is matched with that of the first through hole 41, the upper end of the collector 5 is fixedly connected with the upper end of the water cooling container 4, the upper end of the collector 5 is also connected with the optical fiber fluorescent probe 61, a fourth through hole 51 is arranged at the upper end of the collector 5, and the fourth through hole 51 is connected with a fourth pipeline 52.
The water inlet pipe 21 of the hand pump 2 is provided with a first valve 211, the first branch pipe 221 is provided with a second valve 2211 and a first pressure gauge 2212, the first pressure gauge 2212 is used for measuring and indicating the pressure in the collector 5, the second branch pipe 222 is provided with a third valve 2221 and a second pressure gauge 2222, the second pressure gauge 2222 is used for measuring and indicating the pressure in the kettle body 32, the first pipeline 421 is provided with a fourth valve 4211 and a third pressure gauge 4212, the third pressure gauge 4212 is used for measuring and indicating the pressure in the water cooling container 4, the third pipeline 35 is provided with a fifth valve 351, and the fourth pipeline 52 is provided with a sixth valve 521.
When the device provided by the application is used for simulating a hydrocarbon production process, the mud rock 8 for experiments is placed in the kettle body 32, the first valve 211 and the third valve 2221 are opened, the hand pump 2 is rocked to inject water in the water tank 1 into the kettle body 32 and fill the kettle body 32, meanwhile, the second valve 2211 is opened, the hand pump 2 is rocked to inject water in the water tank 1 into the collector 5 and fill the collector 5, the kettle body 32 is heated by the heater 33, the kettle body 32 transfers the temperature to the water in the kettle body 32, after the water in the kettle body 32 is heated, the mud rock 8 generates crude oil, the fourth valve 4211 is opened, the water in the water storage tank 7 flows into the water cooling container 4, the water in the water cooling container 4 forms a cold cycle, the readings of the first pressure gauge 2212 and the second pressure gauge 2222 are observed, the readings of the first pressure gauge 2212 are controlled to be smaller than the readings of the second pressure gauge 2222, namely, the pressure in the collector 5 is ensured to be lower than the pressure in the kettle body 32, the fifth valve 351 is opened, crude oil sequentially enters the collector 5 through the liquid discharge hole 321, the first pipeline 35 and the water inlet of the collector 5 under the action of pressure difference, the crude oil rises and gathers to the upper end of the collector 5 under the action of buoyancy, under the combined action of cooling water in the water cooling container 4 and water injection and pressurization of the hand pump 2, the high-temperature crude oil is still kept as single liquid phase while the temperature is reduced to normal temperature crude oil, the ultraviolet light emitted by the ultraviolet excitation light source 62 is received by the optical fiber fluorescent probe 61 through the upper end of the collector 5, the optical fiber fluorescent probe 61 irradiates the ultraviolet light to the crude oil in the collector 5 after receiving the ultraviolet light, meanwhile, the optical fiber fluorescent probe 61 receives fluorescence excited by the crude oil, the fluorescence spectrometer 63 acquires the fluorescence spectrum of the crude oil according to the fluorescence excited by the crude oil, after the test is finished, the sixth valve 521 is opened, crude oil in the collector 5 is discharged through the fourth through hole 51 and the fourth line 52; by changing the heating temperature of the heater 33 to the kettle body 32, the relationship between the fluorescence characteristic of the actual discharged oil at different temperature points and the heating temperature can be obtained.
The device provided by the application has the advantages of simple structure and simplicity and convenience in operation; according to the application, the optical fiber detection device 6 is directly connected with the collector 5, so that the fluorescence spectrum testing process of crude oil can be performed without sampling, and the fluorescence of the tested crude oil can be greatly ensured to truly reflect the fluorescence characteristics of the oil originally generated by the hydrocarbon source rock; the device provided by the application can reduce the temperature of crude oil by utilizing the water cooling container 4 and the hand pump 2, can provide higher pressure, and effectively avoids gas-liquid separation of crude oil; the device provided by the application can simulate the process of crude oil generation, discharge and accumulation in an oil reservoir.
In this document, terms such as front, rear, upper, lower, etc. are defined with respect to the positions of the components in the drawings and with respect to each other, for clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed application.
The embodiments described above and features of the embodiments herein may be combined with each other without conflict.
The foregoing description of the preferred embodiments of the application is not intended to limit the application to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the application are intended to be included within the scope of the application.
Claims (7)
1. The in-situ fluorescence observation device for the hydrocarbon source rock hydrocarbon production process for indicating the maturity of an oil inclusion is characterized by comprising a water tank, a hand pump, a reaction kettle, a water cooling container, a collector and an optical fiber detection device, wherein water is filled in the water tank, the water cooling container is of a hollow structure, water is filled in the water cooling container, the collector is positioned in the water cooling container, the collector is connected with the optical fiber detection device, the reaction kettle comprises a heat preservation layer and a kettle body, a heater is arranged between the heat preservation layer and the kettle body, a water inlet pipe of the hand pump is connected with a water outlet of the water tank, a water outlet pipe of the hand pump is respectively connected with a water inlet of the collector and a water inlet of the kettle body, a drain hole is formed in the top end of the kettle body, the drain hole is communicated with the water inlet of the collector, mudstone is placed in the kettle body, the water in the water tank is filled into the kettle body and the collector through the hand pump, the heater heats the kettle body, the temperature is transferred to the water in the kettle body after the kettle body is heated, the water in the kettle body is heated, the mudstone crude oil is heated, the pressure in the collector is smaller than the pressure in the kettle body, the water is cooled down by the water pump under the action of the water pump, and the water cooling effect of the water pump is cooled by the fluorescence device under the action of the water, and the water in the water cooling device, and the single water pump is cooled by the water pump, and the effect of the water pump, and the temperature is cooled down by the water pump and the temperature in the water detector through the water pump and the water detector;
the optical fiber detection device comprises an optical fiber fluorescent probe, an ultraviolet excitation light source and a fluorescence spectrometer, wherein the optical fiber fluorescent probe is connected to the upper end of the collector, the optical fiber fluorescent probe is connected with the ultraviolet excitation light source and the fluorescence spectrometer through optical fibers, ultraviolet light emitted by the ultraviolet excitation light source is received by the optical fiber fluorescent probe through the upper end of the collector, the optical fiber fluorescent probe irradiates ultraviolet light onto crude oil in the collector after receiving the ultraviolet light, meanwhile, the optical fiber fluorescent probe receives fluorescence excited by the crude oil, and the fluorescence spectrometer acquires fluorescence spectrum of the crude oil according to the fluorescence excited by the crude oil;
the collector is of a cone structure with a narrow upper part and a wide lower part, a first through hole is formed in the upper end of the water cooling container, the shape of the first through hole is matched with that of the upper end of the collector, and the upper end of the collector is connected with the upper end of the water cooling container;
the water outlet pipe of hand pump connects first branch pipe and second branch pipe, the water inlet of collector is connected to the delivery port of first branch pipe, the water inlet setting of collector is in the bottom of collector, the water inlet of cauldron body is connected to the delivery port of second branch pipe.
2. The in situ fluorescence observation device for hydrocarbon-derived rock hydrocarbon-producing process indicating oil inclusion maturity of claim 1, wherein a temperature sensor is placed on said heater, said temperature sensor is connected to a first thermometer, said temperature sensor measures the temperature of the heater and sends the measured temperature to the first thermometer, said first thermometer indicates the temperature of the heater.
3. The in-situ fluorescence observation device for hydrocarbon-source rock hydrocarbon-producing process indicating the maturity of oil inclusion according to claim 1, wherein a fourth through hole is arranged at the upper end of the collector, the fourth through hole is connected with a fourth pipeline, and crude oil in the collector is discharged through the fourth through hole and the fourth pipeline.
4. The in-situ fluorescence observation device for hydrocarbon source rock hydrocarbon production process indicating the maturity of an oil inclusion according to claim 1, wherein a third through hole is formed at the lower end of the water cooling container, the third through hole is connected with a second pipeline, and water in the water cooling container is discharged through the third through hole and the second pipeline.
5. The in-situ fluorescence observation device for hydrocarbon source rock hydrocarbon production process indicating oil inclusion maturity according to claim 1, wherein a temperature probe is placed in the kettle body, the temperature probe is connected with a second thermometer, the temperature probe measures the temperature in the kettle body and sends the measured temperature to the second thermometer, and the second thermometer indicates the temperature in the kettle body.
6. The in-situ fluorescence observation device for hydrocarbon source rock hydrocarbon production process indicating the maturity of an oil inclusion according to claim 1, wherein a second through hole is formed in the side surface of the water cooling container, the second through hole is connected with a first pipeline, a water inlet of the first pipeline is connected with a water storage tank, water is contained in the water storage tank, and water in the water storage tank flows into the water cooling container through the first pipeline and the second through hole.
7. The in situ fluorescence observation device for hydrocarbon-producing process of indicating oil inclusion maturity according to claim 1, wherein a first pressure gauge is arranged on the first branch pipe, the first pressure gauge is used for measuring and indicating the pressure in the collector, and a second pressure gauge is arranged on the second branch pipe, and the second pressure gauge is used for measuring and indicating the pressure in the kettle body.
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| Title |
|---|
| Vibrational spectroscopic characterization of mudstones in a hydrocarbon-bearing depression, South China Sea: Implications for thermal maturity evaluation;Entao Liu et al.;Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy;第241-248页 * |
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