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Photoacoustic Gas Detection
| Content Provider | The Lens |
|---|---|
| Description | L'invention concerne un système de fond de trou (100) comprenant un spectromètre photo-acoustique amélioré à quartz (QEPAS) (200) conçu pour être positionné à l'intérieur d'un puits de forage (161) formé dans une zone souterraine d'une formation d'hydrocarbures, un système d'échantillonnage (400) couplé au QEPAS (200), et un système informatique (800) connecté au QEPAS (200). Le système d'échantillonnage (400) est conçu pour être positionné dans le puits de forage (161) et pour obtenir un échantillon d'un fluide de puits de forage à un emplacement de fond de trou dans la zone souterraine. Le QEPAS (200) est conçu pour balayer par spectroscopie l'échantillon et pour déterminer une pluralité de quantités d'une pluralité correspondante d'hydrocarbures dans ce dernier. Le système informatique (800) comprend un ou plusieurs processeurs permettant d'effectuer des opérations comprenant la réception de la pluralité de quantités de la pluralité d'hydrocarbures dans l'échantillon et la détermination d'une pluralité de rapports, chaque rapport étant un rapport d'un hydrocarbure de la pluralité d'hydrocarbures sur un autre hydrocarbure de la pluralité d'hydrocarbures. |
| Abstract | A downhole system (100) includes a quartz enhanced photoacoustic spectrometer (QEPAS) (200) configured to be positioned within a wellbore (161) formed in a subterranean zone of a hydrocarbon formation, a sampling system (400) coupled to the QEPAS (200), and a computer system (800) connected to the QEPAS (200). The sampling system (400) is configured to be positioned in the wellbore (161) and obtain a sample of a wellbore fluid at a downhole location in the subterranean zone. The QEPAS (200) is configured to spectroscopically scan the sample and to determine a plurality of quantities of a corresponding plurality of hydrocarbons in the same. The computer system (800) includes one or more processors to perform operations including receiving the plurality of quantities of the plurality of hydrocarbons in the sample and determining a plurality of ratios, where each ratio is a ratio of one of the plurality of hydrocarbons with another of the plurality of hydrocarbons. |
| Related Links | https://www.lens.org/lens/patent/011-557-384-678-774/frontpage |
| Language | English |
| Publisher Date | 2019-01-17 |
| Access Restriction | Open |
| Alternative Title | Détection Photo-acoustique De Gaz |
| Content Type | Text |
| Resource Type | Patent |
| Date Applied | 2018-07-09 |
| Agent | Bruce, Carl E. Et Al. |
| Applicant | Saudi Arabian Oil Co Aramco Services Co |
| Application No. | 2018041299 |
| Claim | CLAIMS WHAT IS CLAIMED IS; A downhole system comprising: a quartz enhanced photoacoustic spectrometer (QEPAS) configured to be positioned within a wellbore formed in a subterranean zone of a hydrocarbon formation; a sampling system coupled to the QEPAS, the sampling system configured to be positioned in the wellbore, the sampling system configured to obtain a sample of a wellbore fluid at a downhole location in the subterranean zone, the QEPAS configured to spectroscopically scan the sample and to determine a plurality of quantities of a corresponding plurality of hydrocarbons in the sample; and a computer system connected to the QEPAS, the computer system comprising: one or more processors; and a computer-readable medium storing instructions executable by the one or more processors to perform operations comprising: receiving the plurality of quantities of the plurality of hydrocarbons in the sample; and determining a plurality of ratios, each ratio being a ratio of one of the plurality of hydrocarbons with another of the plurality of hydrocarbons. The system of claim 1, wherein the operations further comprise: receiving the plurality of ratios as an input to a design simulation of the hydrocarbon formation; and computationally simulating the hydrocarbon formation based, in part, on the plurality of ratios. The system of claim 1, wherein the QEPAS comprises a laser configured to emit light at a wavelength range at which the plurality of hydrocarbons in the sample are simultaneously detectable. The system of claim 1, wherein the QEPAS comprises a plurality of lasers, each configured to emit light at a respective wavelength at which a respective hydrocarbon of the plurality of hydrocarbons in the sample is detectable. The system of claim 1, wherein the QEPAS comprises a hydrogen sulfide (H2S) laser configured to emit light at a wavelength at which H2S in the sample is detectable. The system of claim 1, wherein the QEPAS comprises: a quartz tuning fork (QTF) configured to detect a pressure wave created in a gas in the sample; and a laser configured to emit light, wherein the pressure wave is created as the light is absorbed by the gas. The system of claim 6, wherein the QEPAS comprises a signal modulator configured to periodically switch a laser injection current to the laser between an on state and an off state or an optical chopper to optically chop the light emitted by the laser. The system of claim 7, wherein the signal modulator is configured to generate a periodic function to modulate a frequency of the light. The system of claim 6, wherein a quality factor (Q factor) of the QTF is of the order of tens of thousands. The system of claim 6, wherein the QTF is a first, passive QTF, wherein the QEPAS comprises a second, active QTF configured to induce a pressure wave in the gas, wherein the first, passive QTF is configured to detect the induced pressure wave. The system of claim 10, further comprising a power source connected to the processer, wherein the power source is configured to drive the second, active QTF in response to receiving a signal from the processor. The system of claim 11, wherein the processor is configured to transmit the signal to the second, active QTF based on a signal received from the first, passive QTF. The system of claim 6, further comprising a temperature controller configured to maintain a temperature of the QEPAS. The system of claim 6, wherein the sampling system comprises: a chamber; a piston positioned within the chamber, the piston sealing an inner surface of the chamber to define a sample receiving volume, wherein the QTF is positioned within the sample receiving volume; an inlet valve fluidically connected to a chamber inlet, wherein a retraction of the piston in the sample receiving volume and an opening of the inlet valve causes the sample to flow into the sample receiving volume; and an outlet valve fluidically connected to a chamber outlet, wherein an advancement of the piston in the sample receiving volume and an opening of the outlet valve causes the sample to flow out of the sample receiving volume. The system of claim 14, wherein the sample is a two-phase sample comprising a gas and a liquid, wherein the inlet valve is configured to de-pressurize the sample to separate the gas from the liquid, wherein the gas rises to an upper portion of the sample receiving volume and the liquid resides in a lower portion of the sample receiving volume, the QEPAS configured to spectroscopically scan the gas in the upper portion. A method comprising: positioning a quartz enhanced photoacoustic spectrometer (QEPAS) at a downhole location within a wellbore formed in a subterranean zone of a hydrocarbon formation; obtaining a sample of a wellbore fluid at the downhole location in the subterranean zone; spectroscopically scanning the sample using the QEPAS at the downhole location; determining a plurality of quantities of a corresponding plurality of hydrocarbons in the sample; and determining a plurality of ratios, each ratio being a ratio of one of the plurality of hydrocarbons with another of the plurality of hydrocarbons. The method of claim 16, further comprising computationally simulating the hydrocarbon formation based, in part, on the plurality of ratios. The method of claim 16, wherein spectroscopically scanning the sample comprises emitting light from a single laser to simultaneously detect the plurality of hydrocarbons. The method of claim 16, wherein spectroscopically scanning the sample comprises emitting a plurality of rays of light from a corresponding plurality of lasers, each laser configured to detect a hydrocarbon of the plurality of hydrocarbons. The method of claim 16, wherein spectroscopically scanning the sample comprises modulating light emitted by a laser configured to detect the plurality of hydrocarbons. |
| CPC Classification | Earth Or Rock Drilling;Obtaining Oil; Gas; Water; Soluble Or Meltable Materials Or A Slurry Of Minerals From Wells Investigating Or Analysing Materials By Determining Their Chemical Or Physical Properties Geophysics;Gravitational Measurements;Detecting Masses Or Objects;Tags |
| Extended Family | 104-662-473-389-25X 100-050-828-688-10X 094-541-259-977-390 010-465-803-474-502 139-887-712-244-670 172-344-850-463-308 121-420-596-495-444 156-808-856-551-993 173-769-753-847-553 011-557-384-678-774 058-522-908-174-549 108-363-908-680-51X 111-771-216-336-727 |
| Patent ID | 2019014134 |
| Inventor/Author | Csutak Sebastian Li Weichang Sampaolo Angelo Ham Gregory |
| IPC | G01N21/17 E21B49/08 G01N29/24 |
| Status | Pending |
| Simple Family | 104-662-473-389-25X 100-050-828-688-10X 094-541-259-977-390 010-465-803-474-502 139-887-712-244-670 172-344-850-463-308 121-420-596-495-444 156-808-856-551-993 173-769-753-847-553 011-557-384-678-774 058-522-908-174-549 108-363-908-680-51X 111-771-216-336-727 |
| CPC (with Group) | E21B49/081 G01N29/46 G01N21/1702 G01N2021/1704 G01N29/2418 G01N2021/1708 G01N29/022 G01N29/228 G01V1/44 |
| Issuing Authority | United States Patent and Trademark Office (USPTO) |
| Kind | Patent Application Publication |
