GB2507959A - Characterising hydrocarbon fluids using mid infrared absorption - Google Patents

Characterising hydrocarbon fluids using mid infrared absorption Download PDF

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Publication number
GB2507959A
GB2507959A GB1220239.6A GB201220239A GB2507959A GB 2507959 A GB2507959 A GB 2507959A GB 201220239 A GB201220239 A GB 201220239A GB 2507959 A GB2507959 A GB 2507959A
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United Kingdom
Prior art keywords
hydrocarbon
hydrocarbon fluid
output field
production flow
fluid
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GB1220239.6A
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GB201220239D0 (en
Inventor
Graeme Peter Alexander Malcolm
Gareth Thomas Maker
John Nicholls
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M Squared Lasers Ltd
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M Squared Lasers Ltd
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Priority to GB1220239.6A priority Critical patent/GB2507959A/en
Publication of GB201220239D0 publication Critical patent/GB201220239D0/en
Priority to PCT/GB2013/052958 priority patent/WO2014072736A1/en
Publication of GB2507959A publication Critical patent/GB2507959A/en
Withdrawn legal-status Critical Current

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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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
    • 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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
    • 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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
    • 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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
    • 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/85—Investigating moving fluids or granular solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; viscous liquids; paints; inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2823—Oils, i.e. hydrocarbon liquids raw oil, drilling fluid or polyphasic mixtures

Abstract

A method and system for characterising a hydrocarbon fluid 2 is described. The method involves exposing the hydrocarbon fluid to an output field 6 generated by a mid-infrared laser source 4. The wavelength of the output field is then scanned and the field is scanned over an area of the hydrocarbon fluid so allowing for the absorption signal 9 of the output field by the hydrocarbon fluid to be measured. From this measured data a spectral profile or fingerprint of the hydrocarbon fluid can be produced. This spectral profile or fingerprint of the hydrocarbon fluid can then be used to identify the source of the hydrocarbon fluid or monitor for the presence of contaminants or foreign fluids entering the hydrocarbon fluid. The method and system finds particular application for real time monitoring of a hydrocarbon production flow.

Description

1 Method for Characterising Hydrocarbon Fluids 3 The present invention relates to the field of hydrocarbon exploration. More specifically, the 4 present invention concerns the provision of a laser spectroscopy method for characterising or fingerprinting" hydrocarbon fluids and in particular a hydrocarbon production flow.
7 Crude oils comprise many different hydrocarbon compounds each of which contribute to 8 its characteristic spectral profile or fingerprint. The composition of such oils is known to 9 differ from country to country and even from different exploratory fields within a single country. For example refined oils may consist of both fuel oils and lubricating oils.
11 Gasoline, kerosene and dieseline are fuel oils that are derived from the refining process 12 and separated according to their different boiling points. Heavier oils are used for 13 lubricating purposes and generally exhibit higher boiling points.
is It is known that the differences in the composition of these oils can be used to distinguish 16 one hydrocarbon fluid from another i.e. the characteristic spectral profile or fingerprint of 17 the hydrocarbon fluid can be used to identify the source of the fluid or to monitor the 18 hydrocarbon fluid so as to check for the presence of contaminants or degradation of the 19 hydrocarbon fluid. This may be achieved without the operator being required to determine 1 the actual chemical components and ratios of the components within the complex 2 hydrocarbon fluid. What is important is the overall spectral profile or fingerprint produced 3 by the combined contribution of all the chemical components present.
Traditional fingerprinting methods have involved the collection of a sample of the 6 hydrocarbon fluid and then separating this sample into various fractions that are then 7 analysed using lab based equipment e.g. Gas Chromatography-Mass Spectrometers to 8 give information regarding their chemical compositions. However, since these methods 9 require large scale laboratory based equipment they cannot normally be used in situations where instant and or remote characterisation is required. Ii
12 In order to address these issues a number of UV induced fluorescence spectroscopy 13 techniques have been developed. This is primarily due to these techniques being able to 14 exploit broadband UV light sources, the wide tuning ability in terms of available excitation IS wavelengths (typically in the range of 200nm to 400nm), and the multiple ways known in 16 the art for detecting and measuring the resulting fluorescence.
18 Some fluorescence methods that have been applied for fingerprinting hydrocarbon fluids 19 include: 21 (a) Synchronous Scan Spectroscopy in which the oil spectra are produced by 22 scanning the excitation wavelength and the emission wavelength, 23 simultaneously, at a fixed wavelength separation; 24 (b) Contour (Total Luminescence) Spectroscopy in which contour diagrams for the oils are constructed out of several emission spectra that are excited at 26 different excitation wavelengths; and 27 (c) Time-resolved Laser-Induced Fluorescence (TRLIF) spectroscopy in which 28 the characterisation of the oils is done by monitoring the spectral as well as 29 the temporal characteristics of the emitted fluorescence in either the excitation or in the detection stages, or in both.
32 The most attractive of the above techniques is TRLIF spectroscopy since a laser source 33 rather than a UV lamp can be employed. This make such systems portable and so more 34 suited for remote sensing applications, see for example US patent publication numbers 2003/0141459, 2008/035858 and international patent publication number W020 12027059.
2 As discussed above, hydrocarbon fluids, such as kerosene, gasoline, and diesel fuel, are 3 each composed of mixtures of different hydrocarbons that fall within certain boiling point 4 ranges loosely coordinated with molecular weight ranges. The type and distribution of hydrocarbons within each class of fuel may also vary according to the geographical source 6 of the crude oil and the type of refining method (distillation, cracking, etc.). These fluids 7 are dense, contain mixtures of hydrocarbons having overlapping excitation-emission 8 spectra, produce fluorescent emissions that may be reabsorbed, and also may be 9 contaminated with quenching compounds. As a result the fluorescence signals are often not particularly strong and so require high sensitive detectors to be employed.
Ii Furthermore, extraction of the relevant data generally requires complex signal processing 12 techniques in order to remove background signals and to separate overlapping excitation- 13 emission spectra. Therefore, fluorescent spectroscopy has certain practical limitations 14 when employed for characterising, or "fingerprinting" hydrocarbon fluids.
IS
16 It is recognised in the present invention that considerable advantage is to be gained in the 17 provision of an alternative method for characterising, or fingerprinting hydrocarbon fluids 18 and in particular one that can be employed in situ and or within remote locations.
It is therefore an object of an aspect of the present invention to obviate or at least mitigate 21 the foregoing disadvantages of the methods of characterising, or fingerprinting 22 hydrocarbon fluids known in the ad.
24 Summary of Invention
26 According to a first aspect of the present invention there is provided a method for 27 characterising a hydrocarbon production flow comprising: 28 -exposing the hydrocarbon production flow to an output field generated by a mid-infrared 29 laser source;
-scanning a wavelength of the output field;
31 -measuring an absorption of the scanned output field following its exposure to the 32 hydrocarbon production flow; and 33 -producing a spectral profile or fingerprint of the hydrocarbon production flow from the 34 measured absorption.
1 Most preferably the method for characterising the hydrocarbon production flow further 2 comprises comparing the produced spectral profile or fingerprint with one or more known 3 spectral profiles or fingerprints.
The output field is preferably exposed to the hydrocarbon production flow by scanning the 6 output field over an area of the hydrocarbon production flow.
8 It is preferable for the measurement of the absorption to comprise the measurement of a 9 back-scatter absorption signal produced by the scanned output field. Alternatively, the measurement of the absorption may comprise the measurement of a transmission signal ii produced by the scanned output field propagating through the hydrocarbon production 12 flow.
14 Most preferably the mid-infrared light source comprises an optical parametric device and in IS particular an intracavity optical parametric device.
17 The output field may comprise a pulsed field having a pulse repetition frequency of more 18 than 100kHz, and preferably more than 200kHz.
The output field generated by the mid-infrared light source preferably comprises a 21 wavelength between 2 to 6 microns. Most preferably the output field generated by the 22 mid-infrared light source comprises a wavelength between 3 to 4 microns.
24 Preferably the output field generated by the mid-infrared light source exhibits a spectral linewidth less than or equal to 53Hz.
27 According to a second aspect of the present invention there is provided a system for 28 characterising a hydrocarbon production flow comprising: 29 -a mid-infrared laser source that provides a means for producing a wavelength scanning
output field;
31 -a scanning and detection system that provides a means for exposing the output field to 32 the hydrocarbon production flow, measuring an absorption of the scanned output field 33 following its exposure to the hydrocarbon production flow, and producing a spectral profile 34 or fingerprint of the hydrocarbon production flow from the measured absorption.
1 Most preferably the system further comprises a database of hydrocarbon fluid spectral 2 profiles or fingerprints.
4 Embodiments of the second aspect of the invention may comprise features to implement the preferred or optional features of the first aspect of the invention or vice versa.
7 According to a third aspect of the present invention there is provided a method for 8 characterising a hydrocarbon fluid comprising: 9 -exposing a hydrocarbon fluid to an output field generated by a mid-infrared laser source;
-scanning a wavelength of the output field;
ii -measuring an absorption of the wavelength scanned output field following its exposure to 12 the hydrocarbon fluid; and 13 -producing a spectral profile or fingerprint of the hydrocarbon fluid from the measured 14 absorption.
IS
16 Most pref erably the exposure of the hydrocarbon fluid to the output field comprises 17 exposing the output field to a hydrocarbon production flow.
19 The output field is preferably exposed to the hydrocarbon production flow by scanning the output field over an area of the hydrocarbon production flow.
22 Alternatively the exposure of the hydrocarbon fluid to the output field comprises exposing 23 the output field to a sample taken from a hydrocarbon fluid.
The output field is preferably exposed to the hydrocarbon fluid by scanning the output field 26 over an area of the hydrocarbon fluid.
28 Embodiments of the third aspect of the invention may comprise features to implement the 29 preferred or optional features of the first or second aspects of the invention or vice versa.
31 According to a fourth aspect of the present invention there is provided a system for 32 characterising a hydrocarbon fluid comprising: 33 -a mid-infrared laser source that provides a means for producing a wavelength scanning
34 output field;
1 -a scanning and detection system that provides a means for exposing the output field to 2 the hydrocarbon fluid, measuring an absorption of the wavelength scanned output field 3 following its exposure to the fluid, and producing a spectral profile or fingerprint of the 4 hydrocarbon fluid from the measured absorption.
6 Most preferably the system further comprises a database of hydrocarbon fluid spectral 7 profiles or fingerprints.
9 The hydrocarbon fluid may comprise a barrel of oil. Alternatively the hydrocarbon fluid may comprise a sample taken from an oil spillage.
ii Embodiments of the fourth aspect of the invention may comprise features to implement the 12 preferred or optional features of the first, second or third aspects of the invention or vice 13 versa.
is Brief Descriøtion of Drawings 17 Aspects and advantages of the present invention will become apparent upon reading the 18 following detailed description and upon reference to the following drawings in which: Figure 1 presents a schematic representation of a system employed to characterise or 21 fingerprint a hydrocarbon production flow; 23 Figure 2 presents a flow chart of the methodology involved in characterising or 24 fingerprinting a hydrocarbon production flow; 26 Figure 3 presents a schematic representation of a mid-infrared laser source employed by 27 the system of Figure 1; 29 Figure 4 presents a schematic representation of a scanning and detection system employed by the system of Figure 1; and 32 Figure 5 presents a schematic representation of a system employed to characterise or 33 fingerprint a sample of a hydrocarbon fluid.
1 Detailed Description
3 A method for characterising or "fingerprinting" a hydrocarbon production flow will now be 4 described with reference to Figures 1 to 4.
6 In the context of this specification the term mid-infrared" is taken to comprise a 7 wavelength range between 2 to 6 microns. In particular, hydrocarbon molecules found 8 within petroleum products exhibit a large number of absorption lines in the mid-infrared 9 range between 3 to 4 microns.
ii Figure 1 presents a schematic representation of a system 1 employed to characterise or 12 fingerprint a hydrocarbon production flow 2. The system 1 can be seen to comprise a fluid 13 conduit 3 that forms part of a hydrocarbon production system, a mid-infrared laser source 14 4 and a raster scanning and detection system 5.
IS
16 It will be appreciated by the skilled reader that the fluid conduit 3 of the hydrocarbon 17 production system may be one of many conduits present in range of locations across the 18 system. These include locations at or on the wellhead, including on a wellhead or mandrel 19 cap, adjacent to the choke body, immediately adjacent the wellhead between aflowline connector or a jumper or as part of fluid intervention system. Alternatively the apparatus of 21 the invention may be used in locations disposed further away from the wellhead. These 22 include (but are not limited to) downstream of a jumper flowline or a section of a jumper 23 flowline; a subsea collection manifold system; a subsea Pipe Line End Manifold (PLEM); a 24 subsea Pipe Line End Termination (PLET); and/or a subsea Flow Line End Termination (FLET).
27 An output field 6 from the mid-infrared laser source 4 is initially directed into the scanning 28 and detection system 5 by two beam steering mirrors 7 and 8. The output field 6 is then 29 directed towards the hydrocarbon production flow 2 located within the fluid conduit 3 by the raster scanning and detection system so as to generate a back-scatter absorption signal 9.
31 The output field 6 may reach the hydrocarbon production flow 2 via a window 10 in the 32 fluid conduit 3. Similarly the back-scatter absorption signal 9 may return to the scanning 33 and detection system 5 via the window 10.
1 It will be appreciated by the skilled reader that separate windows may be employed for the 2 output field 6 and the back-scatter absorption signal 9 Similarly an alternative embodiment 3 (not shown) may comprise separating the components of the scanning and detection 4 system 5 such that the detector component is located so as to measure a transmission signal (not shown) produced by output field 6 after it has propagated through the 6 hydrocarbon production flow 2. This embodiment is less preferable since it increase the 7 overall footprint of the system 1 thus making it less compact and so less portable.
9 Figure 2 presents a flow chart of the method employed by the system of Figure 1. In the first instance the method comprises exposing the hydrocarbon production flow 2 to the Ii output field 6 generated by the mid-infrared laser source 4.
13 The mid-infrared laser source 4 is then scanned such that the wavelength of the output 14 field 6 scans across the wavelength range between 2 to6 microns. More preferably the is output field 6 scans across the wavelength range between 3 to 4 microns 17 The scanning and detection system 5 is employed to scan the position of the output field 6 18 across the hydrocarbon production flow 2 and to then measuring the generated back 19 scatter absorption signal 9.
21 Finally, the scanning and detection system 5 is employed to producing a spectral profile or 22 fingerprint of the hydrocarbon production flow 2 from the measured absorption signal 9.
24 A suitable mid-infrared laser source 4 is an intracavity Optical Parametric Oscillator (OPO) as presented schematically within Figure 3 and as described in detail within international 26 patent publication number WO 2006/061567.
28 The intracavity GPO 4 comprises a first optical cavity (pump laser cavity) containing a 29 laser gain medium 11 that serves to provide a pump wave source for the nonlinear parametric process. The laser gain medium 11 comprises a Nd:YVO4 crystal that provides 31 a pump wave source at 1.064 microns.
33 The intracavity GPO 4 further comprises a semiconductor diode 12 that provides an 34 excitation source at 808.Snm for the laser gain medium 11.
1 A further component of the intracavity GPO 4 is a second optical cavity (signal cavity) that 2 is in part common to the first optical cavity and which contains in that common part a a nonlinear crystal 13. The non-linear crystal 13 may comprise a periodically poled 4 nonlinear crystal (for example PPLN or PPRTA), which serves to generate the down converted waves. The non-linear crystal 13 is triple-band antireflection coated for the
6 pump, signal and idler fields.
8 The diode 12 is thermoelectrically cooled such that the wavelength of the radiation it emits 9 is coincident with the peak absorption in the Nd:YVO4 crystal 11. The radiation emitted by the diode 12 is collimated and then focused down into the Nd:YVO4 crystal by a focusing ii lens assembly 14. Radiation emitted from the crystal 11 is then directed onto an intracavity 12 mirror 15.
14 On the same optical path as the intracavity mirror 15 are a 0-switch element 16, a pump cavity etalon 17, an anti-reflection (at the pump wavelength) coated intracavity lens 18, a 16 beam splitter 19, the nonlinear crystal 13, and a curved pump/signal mirror 20. Opposite 17 the beam splitter 19 is a signal cavity etalon 21 and a signal mirror 22.
19 The pump laser cavity is defined by the rear face of the Nd:YVO4 crystal 11, which is antireflection coated for 808.5nm light and highly reflecting at 1.O64microns and the 21 pump/signal mirror 20, which is highly reflecting at 1.O64microns and broad-band highly 22 reflecting centred at 1.550 microns. An appropriate beam waist of the pump intracavity 23 field is formed in the nonlinear crystal 13 by the antireflection coated intracavity lens 18 24 and the curved pump/signal mirror 20. The beamsplitter 19 is coated on both sides to be antireflection at the pump wavelength but, on its lower face, highly reflecting at the signal 26 wavelength. Thus, the pump/signal mirror 20 and the signal mirror 22 act to form the 27 signal cavity.
29 With this arrangement the (mid-infrared) idler radiation is not resonated and exits the cavity through the pump/signal mirror 20 after being generated in the nonlinear crystal 13 31 so as to form an output field 6 for the system. As is known to those skilled in the art the 32 wavelength of this output field 6 can be tuned by simply temperature tuning the 33 (periodically poled) nonlinear crystal 13.
1 The above arrangement thus provides a portable laser source that exhibits a pulsed output 2 field having a pulse repetition frequency of more than 100kHz, a spectral linewidth of less 3 than or equal to 5GHz and which can be wavelength tuned from 2 to 6 microns. The 4 intracavity OPO 4 is therefore an ideal source for carrying out absorption spectroscopy upon a hydrocarbon fluid.
7 A suitable scanning and detection system 5 is also described in detail within international 8 patent publication number WO 2006/061 567 and presented schematically within Figure 4.
The output field 6 enters the scanning and detection system 5 along an optical axis 23.
ii The output field 6 is then incident on a plane mirror 24 placed on-axis in front of a 12 collimating lens 25, which is fabricated from a material which exhibits high transmission 13 over the 3 to 4 micron range, for example calcium fluoride. From the mirror 24, the output 14 field 6 is directed via a rotating polygon scanner 26 and tilting mirror 27 to the hydrocarbon is production flow 2. The back-scattered absorption signal 9 returning from the hydrocarbon 16 production flow 2 is collected via the same tilting mirror 27 and polygon scanner 26 and is 17 then focused by a collection lens 28 onto the single element detector 29 located in its 18 image plane. The area of the collection lens 28 is sufficient such that the effective limiting 19 collection aperture for the back-scattered absorption signal 9 occurs at the polygon mirror facet. This arrangement ensures that the detector 29 always views the area of the 21 hydrocarbon production flow 2 currently being illuminated by the scanned output field 6, 22 i.e. the viewing direction is scanned in spatial synchronism with the illuminating beam.
24 The lens 25 placed before the mirror 24 allows independent adjustment of the focusing of the illuminating output field 6 on the hydrocarbon production flow 2. In particular it allows 26 the projection of a beam waist onto the target area so as to optimise the spatial resolution 27 of the scanner in relation to the response time of the detector and the lateral extent of the 28 area being scanned. Since the detector employed exhibits sensitivity over a broad range of 29 wavelengths, a band pass filter 30 may be placed in close proximity to the detector 29 in order to reject stray infrared radiation from hot objects, lights and pump and signal fields 31 that are leaked through OPO mirror PSM.
33 Connected to the detector 29 are the acquisition electronics 31, which in turn are 34 connected to a display 32 and a trigger detector 33. Associated with the trigger detector 33 is a low power laser diode 34. The low power laser diode 34 is positioned to direct light 1 onto the rotating polygon 26. Radiation reflected from the polygon 26 falls on the detector 2 33 at a pre-determined trigger position. Detection of light by the detector 33 is used to 3 trigger the image acquisition electronics 31 at the correct point of the polygon rotation 26 4 when scanning a horizontal line. When the trigger signal is received, the acquisition electronics 31 capture data from the detector 29, process that data and provide a real-time 6 spectral profile or fingerprint of the hydrocarbon production flow 2.
8 The polygon scanner 26 provides line scanning of the output field 6 in a horizontal 9 direction. The tilting mirror 27 provides scanning in the orthogonal (vertical) direction, and is setup so as to provide beam deflection over an angle of similar to that of the polygon Ii scanner 26. The rotational speed of the polygonal scanner 26 is such that the maximum 12 bandwidth of the detector 29 and the subsequent acquisition electronics 31 are not 13 exceeded. In use, a trigger signal from the acquisition electronics 31 is fed to the Q-Switch 14 l6in order to emit a mid-infrared pulse for every pixel acquired. Therefore, the maximum is rate at which the Q-switch 16 can be triggered determines the upper ceiling of the framing 16 rate that can be obtained from the system.
18 The spectral profile or fingerprint of the hydrocarbon production flow 2 can then be 19 compared with a database 35 of known spectral profiles or fingerprints. This database 35 may be stored within the acquisition electronics 31. As a result the identification and 21 quality of the hydrocarbon production flow 2 can be monitored in real time so as to 22 highlight the presence of any contaminants or similar foreign fluids that have entered into 23 the hydrocarbon production flow 2. The presence of these contaminants or foreign fluids 24 would result in a change in the detected fingerprint of the hydrocarbon production flow 2.
26 Figure 5 presents a schematic representation of a system 36 employed to characterise or 27 fingerprint hydrocarbon fluid sample 37. The system 36 can again be seen to comprise a 28 fluid sample 37, a mid-infrared laser source 4 and a raster scanning and detection system 29 5. The system operates in a similar manner to that described above in relation to the hydrocarbon production flow 2, and as presented by the flow diagram of Figure 2. The 31 system 36 is however suited for testing hydrocarbon samples 37 such as the contents of a 32 barrel or an oil spillage. In this way a fingerprint of the sample 37 can be quickly obtained.
33 Thereafter, an identification of the original source of the fluid sample 37 may be made by 34 comparing the spectral profile or fingerprint obtained with the database 35 of known spectral profiles or fingerprints. This process can be repeated at a later time so as to 1 monitor for the effects of weathering of a hydrocarbon fluid spillage or degradation of the 2 hydrocarbon fluid itself.
4 The above described systems and methods provide an alternative for fingerprinting hydrocarbon fluids. The described techniques are based on absorption spectroscopy 6 rather than fluorescence spectroscopy and as such do not require high sensitive detectors 7 to be employed. Furthermore, the extraction of the relevant data requires simpler signal 8 processing techniques than those generally employed with fluorescence spectroscopy 9 techniques.
ii As a result of the portability of the devices and the speed of data acquisition the system 12 and methods can be employed with a hydrocarbon production fluid so as to provide a 13 means for real time analysis of a production fluid.
is The described fingerprinting techniques can also be readily employed to determine what 16 type of oil is being analysed, for example distinguishing it from a crude oil source or a 17 refined oil source. The source of the oil being analysed can also be determined by 18 comparing the generated fingerprints with known fingerprints stored in a database. As a 19 result, the fingerprinting techniques can also be used to link samples taken from an oil spillage to a suspected oil source.
22 A method and system for characterising a hydrocarbon fluid is described. The method 23 involves exposing the hydrocarbon fluid to an output field generated by a mid-infrared 24 laser source. The wavelength of the output field is then scanned and the field is scanned over an area of the hydrocarbon fluid so allowing for the absorption of the output field by 26 the hydrocarbon fluid to be measured. From this measured data a spectral profile or 27 fingerprint of the hydrocarbon fluid can be produced. This spectral profile or fingerprint of 28 the hydrocarbon fluid can then be used to identify the source of the hydrocarbon fluid or 29 monitor for the presence of contaminants or foreign fluids entering the hydrocarbon fluid.
The method and system finds particular application for real time monitoring of a 31 hydrocarbon production flow.
33 The foregoing description of the invention has been presented for purposes of illustration 34 and description and is not intended to be exhaustive or to limit the invention to the precise form disclosed. The described embodiments were chosen and described in order to best 1 explain the principles of the invention and its practical application to thereby enable others 2 skilled in the art to best utilise the invention in various embodiments and with various a modifications as are suited to the particular use contemplated. Therefore, further 4 modifications or improvements may be incorporated without departing from the scope of the invention as defined by the appended claims.
GB1220239.6A 2012-11-09 2012-11-09 Characterising hydrocarbon fluids using mid infrared absorption Withdrawn GB2507959A (en)

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PCT/GB2013/052958 WO2014072736A1 (en) 2012-11-09 2013-11-11 Method for characterising hydrocarbon fluids

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US11187224B2 (en) 2013-07-16 2021-11-30 Abs Global, Inc. Microfluidic chip
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CN105403532A (en) * 2015-12-01 2016-03-16 浙江大学 Method for quickly identifying walnut powder production places

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050053104A1 (en) * 2003-09-10 2005-03-10 Kulp Thomas Jan Backscatter absorption gas imaging systems and light sources therefore
EP1623209A1 (en) * 2003-05-06 2006-02-08 Baker Hughes Incorporated Method and apparatus using a tunable diode laser spectrometer for analysis of hydrocarbon samples
WO2006061567A1 (en) * 2004-12-06 2006-06-15 The University Court Of The University Of St Andrews A detector/imager
EP2165180A1 (en) * 2007-07-09 2010-03-24 Integrated Optoelectronics AS Measuring of fuel composition by using laser
EP2406613A1 (en) * 2009-03-12 2012-01-18 Integrated Optoelectronics AS Method and system for the measurement/detection of chemical spillage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4994671A (en) * 1987-12-23 1991-02-19 Schlumberger Technology Corporation Apparatus and method for analyzing the composition of formation fluids
US6633043B2 (en) 2002-01-30 2003-10-14 Ezzat M. Hegazi Method for characterization of petroleum oils using normalized time-resolved fluorescence spectra
US7560711B2 (en) 2006-08-09 2009-07-14 King Fahd University Of Petroleum And Minerals Multiple fingerprinting of petroleum oils using normalized time-resolved laser-induced fluorescence spectral subtractions
CN101865839A (en) * 2010-07-13 2010-10-20 中国人民解放军总后勤部油料研究所 Method for rapidly monitoring production of lubricating oil
US8455845B2 (en) 2010-08-23 2013-06-04 Saudi Arabian Oil Company Method for detecting drag reducer additives in gasoline
CN102841069B (en) * 2011-06-23 2015-07-01 中国石油化工股份有限公司 Method for rapidly identifying types of crude oil by using mid-infrared spectrum

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1623209A1 (en) * 2003-05-06 2006-02-08 Baker Hughes Incorporated Method and apparatus using a tunable diode laser spectrometer for analysis of hydrocarbon samples
US20050053104A1 (en) * 2003-09-10 2005-03-10 Kulp Thomas Jan Backscatter absorption gas imaging systems and light sources therefore
WO2006061567A1 (en) * 2004-12-06 2006-06-15 The University Court Of The University Of St Andrews A detector/imager
EP2165180A1 (en) * 2007-07-09 2010-03-24 Integrated Optoelectronics AS Measuring of fuel composition by using laser
EP2406613A1 (en) * 2009-03-12 2012-01-18 Integrated Optoelectronics AS Method and system for the measurement/detection of chemical spillage

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11243494B2 (en) 2002-07-31 2022-02-08 Abs Global, Inc. Multiple laminar flow-based particle and cellular separation with laser steering
US11422504B2 (en) 2002-07-31 2022-08-23 Abs Global, Inc. Multiple laminar flow-based particle and cellular separation with laser steering
US11415936B2 (en) 2002-07-31 2022-08-16 Abs Global, Inc. Multiple laminar flow-based particle and cellular separation with laser steering
US11193879B2 (en) 2010-11-16 2021-12-07 1087 Systems, Inc. Use of vibrational spectroscopy for microfluidic liquid measurement
US11187224B2 (en) 2013-07-16 2021-11-30 Abs Global, Inc. Microfluidic chip
US11512691B2 (en) 2013-07-16 2022-11-29 Abs Global, Inc. Microfluidic chip
US11796449B2 (en) 2013-10-30 2023-10-24 Abs Global, Inc. Microfluidic system and method with focused energy apparatus
US11639888B2 (en) 2013-10-30 2023-05-02 Abs Global, Inc. Microfluidic system and method with focused energy apparatus
US11415503B2 (en) 2013-10-30 2022-08-16 Abs Global, Inc. Microfluidic system and method with focused energy apparatus
US10865638B2 (en) 2014-09-15 2020-12-15 Schlumberger Technology Corporation Mid-infrared sensor
US10539500B2 (en) 2014-09-15 2020-01-21 Schlumberger Technology Corporation Active surface cleaning for a sensor
US10345480B2 (en) 2014-09-15 2019-07-09 Schlumberger Technology Corporation Mid-infrared acid sensor
GB2530098A (en) * 2014-09-15 2016-03-16 Schlumberger Holdings Mid-infrared acid sensor
US11221431B2 (en) 2014-09-15 2022-01-11 Schlumberger Technology Corporation Mid-infrared carbon dioxide sensor
US10921482B2 (en) 2014-09-15 2021-02-16 Schlumberger Technology Corporation Mid-infrared carbon dioxide sensor
US10451784B2 (en) 2014-09-15 2019-10-22 Schlumberger Technology Corporation Temperature invariant infrared filter
US10487646B2 (en) 2014-09-15 2019-11-26 Schlumberger Technology Corporation Mid-infrared sensor
GB2530098B (en) * 2014-09-15 2017-02-22 Schlumberger Holdings Mid-infrared acid sensor
US10180388B2 (en) 2015-02-19 2019-01-15 1087 Systems, Inc. Scanning infrared measurement system
WO2016132222A3 (en) * 2015-02-19 2016-11-24 Premium Genetics (Uk) Ltd. Scanning infrared measurement system
EP4137798A1 (en) * 2015-02-19 2023-02-22 1087 Systems, Inc. Scanning infrared measurement system
US10677710B2 (en) 2015-02-19 2020-06-09 1087 Systems, Inc. Scanning infrared measurement system
US11674882B2 (en) 2015-02-19 2023-06-13 1087 Systems, Inc. Scanning infrared measurement system
US11331670B2 (en) 2018-05-23 2022-05-17 Abs Global, Inc. Systems and methods for particle focusing in microchannels
US11889830B2 (en) 2019-04-18 2024-02-06 Abs Global, Inc. System and process for continuous addition of cryoprotectant
US11628439B2 (en) 2020-01-13 2023-04-18 Abs Global, Inc. Single-sheath microfluidic chip
US11965816B2 (en) 2021-02-01 2024-04-23 1087 Systems, Inc. Use of vibrational spectroscopy for microfluidic liquid measurement

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