Abstract: Systems and methods for placing well bores and/or portions of completed well systems in a subterranean formation relative to tar mats or other phenomena in the formation are provided. In some embodiments, the methods comprise: identifying a reservoir characteristic associated with a chemical or physicochemical property of a fluid in or proximate to the reservoir characteristic; measuring the property of a fluid in at least a portion of a subterranean formation in two or more locations in the subterranean formation; identifying a variation of the property of the fluid at one or more of the locations in the subterranean formation; and determining a target location or direction for a portion of a well system based at least in part on the variation of the property of the fluid, the well system comprising a borehole penetrating the subterranean formation.

Abstract: Interaction of adsorbing chemicals with a downhole tool presents inaccuracies in the adsorbing chemical measurement and analysis. The principles of the present disclosure provide a method and system of sampling fluids including an adsorbing chemical in a subterranean reservoir. One method may include modeling an interaction between the adsorbing chemical and a downhole tool, applying the model to a measurement of the adsorbing chemical, and adjusting the measurement in response to applying the model.

Abstract: An illustrative method for measuring a fluid viscosity that includes vibrating a tube containing a fluid of interest, obtaining a vibration signal from the vibrating tube, deriving a system energy loss rate measurement from the vibration signal, calculating an energy loss rate for the fluid of interest from the system energy loss rate measurement and a reference energy loss rate measurement, and generating a viscosity measurement of the fluid of interest based on the energy loss rate for the fluid of interest and a density of the fluid of interest.

Abstract: A method for fabricating an optical element including selecting a lamp spectrum and bandpass filter spectrum, obtaining a spectral characteristics vector to quantify the concentration of a component in a sample and obtaining a target spectrum from the lamp spectrum, the bandpass filter spectrum, and the spectral characteristics vector, is provided. Further including selecting a number of layers less than a maximum value, and performing an optimization routine using the index of refraction and thickness of each of the number of layers until an error between a model spectrum and the target spectrum is less than a tolerance value, or a number of iterations is exceeded. And reducing the number of layers if the error is less than a tolerance and stopping the procedure if the number of iterations is exceeded. A device using an optical element for optically-based chemometrics applications fabricated using the method above is also provided.

Abstract: A tool including a dispersive spectrometer deployable within a wellbore is provided. The dispersive spectrometer includes a waveguide layer to detect electromagnetic radiation according to wavelength. The dispersive spectrometer also includes a plurality of detector elements disposed along the waveguide layer to detect electromagnetic radiation associated with a portion of the wavelength of the electromagnetic radiation. A method for using the tool in a subterranean application is also provided.

Abstract: A method, system, and device for terahertz spectroscopy to analyze a sample. The device comprises a transmitter, a waveguide, a receiver, and a processor. The transmitter generates electromagnetic (EM) radiation in a terahertz frequency band from about 0.1 terahertz to about 10 terahertz. The waveguide propagates the EM radiation generated from the transmitter and houses the sample to attenuate the EM radiation. The receiver is in communication with the waveguide and generates a signal in response to EM radiation propagating in the waveguide. The processor analyzes the signal to identify a parameter associated with the sample.

Abstract: Interaction of adsorbing chemicals with a downhole tool presents inaccuracies in the adsorbing chemical measurement and analysis. The principles of the present disclosure provide a method and system of sampling fluids including an adsorbing chemical in a subterranean reservoir. One method may include modeling an interaction between the adsorbing chemical and a downhole tool, applying the model to a measurement of the adsorbing chemical, and adjusting the measurement in response to applying the model.

Abstract: A tool including a probe deployable within a wellbore and an optical analysis device coupled to the probe is provided. The optical analysis device includes a two-dimensional (2D) waveguide layer to transmit and to disperse an electromagnetic radiation according to wavelength and including detector elements disposed along an edge, each detector element providing a signal associated with a pre-determined wavelength portion of the electromagnetic radiation. The optical analysis device also includes a substrate layer electrically coupled to receive the signal from each of the detector elements and form a spectrum of the electromagnetic radiation with the processor. A method for using the tool in a wellbore application, a pipeline application, or a reservoir storage application is also provided.

Abstract: A device for coating an interior surface of a housing defining a volume comprising a plurality of reactant gas sources including reactant gases for one or more surface coating processes; first and second closures to sealingly engage with an inlet and outlet of the volume of the housing to provide an enclosed volume; a delivery line fluidically coupled to the first closure and the plurality of reactant gas sources to deliver the reactant gases to the enclosed volume; and an output line fluidically coupled to the second closure to remove one or more reactant gases, byproduct gases, or both from the enclosed volume. A method for coating an interior surface of a housing is also provided.

Abstract: A method includes collecting tracer concentration measurements from a flow stream in a borehole as a function of time. The method also includes recovering an uplink telemetry signal from the collected tracer concentration measurements, wherein the uplink telemetry signal conveys a downhole tool measurement or communication. The method also includes performing an operation in response to the recovered uplink telemetry signal.

Abstract: Disclosed are methods and systems for determination of fluid contamination of a fluid sample from a downhole fluid sampling tool.

Abstract: Downhole tools for isolating and analyzing one or more gases include a gas separation assembly in fluid communication with a gas specific analyzer. The gas separation assembly includes a piston disposed within a housing and a separation volume defined between the piston and the housing. The piston is movable to separate a gas component and a liquid component from a downhole formation fluid within the separation volume. The gas specific analyzer is operable to measure one or more properties of the gas component. In some configurations, the gas specific analyzer is an optical assembly containing a light source, an optical detector, and a gas cell that contains an observation volume. The optical assembly is operable to measure one or more properties of the gas component within the observation volume via the light source and the optical detector.

Abstract: Technologies for providing optical analysis systems using an integrated computational element with laterally-distributed spectral filters are described. A measurement tool contains an optical element including a substrate and a plurality of spectral filters supported by the substrate and arranged at different lateral positions with respect to a path of light to be received from a sample during operation of the measurement tool. Each spectral filter is formed to transmit or reflect a different subset of wavelengths in a wavelength range. Additionally, each spectral filter has a respective area exposed to the light from the sample, such that the respective areas are related to a property of the sample. The wavelength range can include wavelengths in a range from about 0.2 ?m to about 25 ?m. Additionally, the sample can include wellbore fluids and the property of the sample is a property of the well-bore fluids.

Abstract: Systems and methods for subterranean formation testing. A method may include lowering a formation testing tool into a subterranean formation, wherein the formation testing tool may comprise a plurality of chambers, a pump and a probe channel; extracting a fluid from the subterranean formation into the probe channel; determining fluid properties at different depths; generating a fluid property-depth gradient; moving the fluid into the plurality of chambers; and determining a concentration of an inorganic portion of a downhole flashed gas.

Abstract: The invention relates to a method of determining an unknown property or information of a reservoir fluid. The method includes measuring a set of responses of a measuring instrument to the fluid and measuring one or more physical or chemical properties of the fluid. The method further includes determining the unknown property or information of the fluid based on the relationship between the instrument responses and the measured properties of the fluid using equation-of-state (EOS) model.

Abstract: The embodiments herein relate to sensors having reactive filter materials for detecting analytes in wellbores. The sensor includes at least one reactive filter material arranged in a flow line, wherein the reactive filter material sorbs an analyte in a wellbore fluid in the flow line; and at least one detector that detects a sorption signal specific to the analyte at at least a first location and a second location of the reactive filter material, wherein the first location is upstream in the flow line relative to the second location. The detector either (1) calculates a balanced measurement corresponding to the presence of the analyte in the wellbore or (2) relays the measurements to a signal processing unit to calculate a balanced measurement corresponding to the presence of the analyte in the wellbore.

Abstract: A system and method are disclosed for configuring an integrated computational element (ICE) to measure a property of a sample of interest. The system includes an illumination source to provide a sample light which is reflected from or transmitted through a sample. A dispersive element disperses the sample light into wavelength portions. An intensity modulation device having an array of electronically controllable modulation elements is disclosed that forms a pattern which modulates the dispersed sample light. Collection optics focuses the modulated sample light on a detector, which generates a signal that correlates to a property of the sample. The electronically controllable modulation elements can be readily altered to conform to a different measurable property of a sample of interest as desired.

Abstract: An optical computing device having a redundant light source and/or a plurality of optical elements (i.e., optical train) in order to simultaneously determine characteristics of a sample in real-time by deriving the characteristic data from the output of the optical elements.

Abstract: Systems and methods for subterranean formation testing. A method may include: lowering a formation testing tool into a subterranean formation, wherein the formation testing tool may include memory, a pump, a formation probe, at least two sample chambers, wherein the at least two sample chambers may include probes to measure pressure and temperature; extracting a fluid from the subterranean formation with the pump and the formation probe; flowing the fluid into the at least two sample chambers with the pump; storing pressure and temperature data of the fluid in the memory; and removing the at least two sample chambers from the formation testing tool.

Abstract: The present application relates sensing reactive components in fluids by monitoring band gap changes to a material having interacted with the reactive components via physisorption and/or chemisorption. In some embodiments, the sensors of the present disclosure include the material as a reactive surface on a substrate. The band gap changes may be detected by measuring conductance changes and/or spectroscopic changes. In some instances, the sensing may occur downhole during one or more wellbore operations like drilling, hydraulic fracturing, and producing hydrocarbons.