Abstract: Examples of methods and systems are disclosed. The methods may include obtaining, using a seismic processing system, seismic data regarding a subsurface region of interest and determining a plurality of first arrivals based on the seismic data. The methods may also include determining, using the seismic processing system, a plurality of filtered first arrivals by applying a modal filter and replacement interpolation to the plurality of first arrivals, and generating a seismic image based, at least in part, on the plurality of filtered first arrivals.

Abstract: A method may include determining cycle-slip error data using a cycle-slip error detection technique and a first set of positioning signals. The method may further include determining multipath error data using a multipath error detection technique and the first set of positioning signals. The method may further include determining whether the positioning satellites satisfy a predetermined criterion based on the cycle-slip error data and the multipath error data. The method further includes determining a second set of positioning satellites in response to determining that the first set of positioning satellites fail to satisfy the predetermined criterion. The first set of positioning satellites may be different from the second set of positioning satellites. The method may further include obtaining a second set of positioning signals using the second set of positioning satellites. The method further includes determining position data using the second set of positioning signals.

Abstract: Systems and methods are disclosed. The method includes obtaining seismic data for a geological region of interest, a velocity model, and an attenuation model. The seismic data includes an amplitude and a phase of seismic waves traveling from a seismic source location. The method further includes determining a traveltime model using the seismic source location, the velocity model, and a traveltime Eikonal function and determining an attenuated traveltime model using a parallel fast sweeping method. The parallel fast sweeping method includes Cuthill-McKee ordering a plurality of grid nodes. The plurality of grid nodes represents the geological region of interest. The parallel fast sweeping method further includes using the seismic source location, the velocity model, the attenuation model, the traveltime model, and an attenuated traveltime Eikonal function. The method still further includes generating an updated attenuation model using the attenuated traveltime model, the amplitude, and the phase.

Abstract: Modified zeolite may include a microporous framework including a plurality of micropores having diameters of less than or equal to 2 nm, wherein the microporous framework includes at least silicon atoms and oxygen atoms; a plurality of mesopores having diameters of greater than 2 nm and less than or equal to 50 nm, wherein the plurality of mesopores are ordered with cubic symmetry. The modified zeolite also includes: isolated terminal primary amine functionalities bonded to silicon atoms of the microporous framework; or silazane functionalities, wherein the nitrogen atom of the silazane bridges two silicon atoms of the microporous framework; or both.

Abstract: Shearable lift gas valves (“SLG valves”) are installed in a well and operate on a contingency basis for injecting lift gas into the well; such as when a lift gas valve that has been in service becomes inoperable or inefficient, or changed well conditions necessitate some form of artificial lift. The SLG valves are maintained in a non-activated configuration with an inner retaining element, and are activated by applying a designated pressure that fractures the retaining element; when activated, the SLG valves operate like other automatic gas lift valves. A SLG valve is installed at a set pressure to replace the inoperable lift gas valve, or at a set pressure that anticipates a change in well conditions, so that when activated, the SLG valve functions at a set pressure different from an in service lift gas valve, and optimizes production from the well with the changed conditions.

Abstract: A plasmonic substrate includes a base, a metallic film on the base, and a semiconducting photocatalyst on the metallic film. A method for producing a plasmonic substrate includes depositing a first metal layer having a thickness ranging from 10 to 200 nm and having a first metal through a physical vapor deposition technique onto a base, depositing a second metal layer having a second metal through a physical vapor deposition technique onto the first metal layer forming a multilayered metal template, immersing the multilayered metal template into a solution having a salt or complex of the second metal for a period of time forming a metallic film, and depositing a semiconducting photocatalyst on the metallic film. A method of catalyzing hydrogen production includes immersing a plasmonic substrate in a photocatalytic solution, exposing the plasmonic substrate to light, and generating hydrogen at a surface of the semiconducting photocatalyst.

Abstract: A controlled low strength material has constituents that include a cement, an aggregate, and a water. The aggregate includes concrete demolition waste. The controlled low strength material has a compressive strength that does not exceed 8.3 MPa, measured at 28 days. The controlled low strength material can alternately include a heavy oil fuel ash and the controlled low strength material can have a compressive strength that does not exceed 2.10 MPa, measured at 28 days.

Abstract: The present disclosure relates to systems and/or methods for monitoring one or more motor space heaters. For example, various embodiments described herein can relate to a method for monitoring one or more motor space heaters that includes detecting that an electric motor is inactive based on operation data generated by a sensor circuit coupled to the electric motor. Additionally, the method can include determining, in response to the detecting, whether a motor space heater in proximity to the electric motor is active based on the operation data. Also, the sensory circuit can be further coupled to the motor space heater.

Abstract: A system and method for hydraulic fracturing a subterranean formation with fracturing fluid to generate fractures, and intermittently adjusting a characteristic of the fracturing fluid conveying proppant to form pillars of proppant in the fractures.

Abstract: Methods including the steps of mixing a treatment fluid comprising: a base fluid; a strong acid; and a plant edible demulsifier (PED). Wherein the PED comprises a capsaicinoid extract at a wt % range of 0.5 wt % to 10 wt %, based on the total weight of the treatment fluid. And then pumping the treatment fluid into a wellbore drilled through a subterranean formation. Wherein the PED reduces or eliminates formation of an emulsion in the treatment fluid. Some methods take the further step of injecting the PED into a wellbore drilled through the subterranean formation. And systems using the PED.

Abstract: An electric submersible pump (ESP) including: a switched reluctance motor (SRM) including stator coils. The number of the stator coils is a multiple of three, surface electronics that drive the SRM, a cable that connects the SRM to the surface electronics. The cable includes conductors in a number equal to the number of the stator coils, each cable includes a push-pull driver that connects the cable to a ground, a DC voltage different from the ground, or disconnects the cable.

Abstract: A method may include determining various tasks associated with a user assessment. The method may further include generating a virtual reality (VR) space for the user assessment based on the tasks. The method may further include transmitting, during the user assessment, VR image data to a headset coupled to the user device. The VR image data may correspond to the VR space. The method may further include generating a user assessment recording in response to a user performing tasks in the VR space. The user assessment recording may be based on the VR image data and an avatar of the user based on image data from a camera device coupled to the user device. The user assessment recording may be a mixed-reality recording of the user assessment.

Abstract: A system for reducing internal combustion engine emissions includes a main exhaust line, a multi-particulate filter, and a valve connected between the main exhaust line and the multi-particulate filter. The multi-particulate filter contains a first particulate filter, a second particulate filter, a first ozone injector, a second ozone injector, and an oxidation catalyst. A process for reducing internal combustion engine emissions includes flowing exhaust emissions through a main exhaust line and alternating filtering the exhaust emissions with a first and second particulate filter. Alternating includes adjusting one or more valves to bypass the second particulate filter and filter the exhaust emissions with the first particulate filter while injecting the second particulate filter with ozone. The process also includes adjusting the position of the one or more valves to flow exhaust emissions to the second particulate filter while the first particulate filter receives injected ozone.

Abstract: A system includes a control system disposed on a well surface and a pipe component disposed in a wellbore to form an annulus that is in fluid communication with a reservoir. The system includes a valve in fluid communication with the annulus. The system includes a recorder configured to detect data of the annulus. The system includes a fluid conduit configured to flow annular fluid from one or more annuli disposed in the wellbore. The fluid conduit is in fluid communication with the annulus, the valve, and a relief tank. The system includes a communication cable coupled to the control system, the valve, and the recorder. The recorder is configured to transmit the data to the control system.

Abstract: A well system includes a wellbore extending from a surface location, production tubing arranged within the wellbore and thereby defining an annulus between the production tubing and an inner wall of the wellbore, a plurality of gas-lift valves arranged on the production tubing and operable to receive a lift gas from the annulus and discharge the lift gas into an interior of the production tubing, a unique tracer provided at each gas-lift valve and releasable into the interior of the production tubing as the lift gas circulates through a corresponding one of the plurality of gas-lift valves, and a tracer detection system arranged at the surface location and operable to detect the unique tracer comingled with the lift gas and a production fluid circulating within the production tubing.

Abstract: A method can include receiving Stoneley wave data acquired by a sonic tool disposed in a borehole in a formation; performing an inversion using the Stoneley wave data to generate formation and borehole information; and identifying an interval along the borehole for performance of a downhole acquisition operation by a downhole tool using a machine learning model and the formation and borehole information as input to the machine learning model.

Abstract: A fluid sampling device including an inlet configured to receive a portion of a non-homogeneous fluid flowing through a conduit, a first double block bleed valve coupled to the inlet, a first flexible hose coupled to the first double block bleed valve by a first quick acting and leakage free coupling, a collection drum coupled to the first flexible hose by a first control valve, and a container coupled to the connection drum by a manual valve, wherein the device is configured to collect a fluid sample in the container. The device also includes a pressure controller to control pressure within the collection drum, and a level indicator to indicate a level of fluid in the collection drum.

Abstract: A system includes a first tubular string within a wellbore and a collar coupled to a top of the first tubular string. The collar may include a body extending from a first end to a second end. The body includes an internal ring extending radially inward from an inner surface of the body. The internal ring includes at least two holes extending through a top surface of the internal ring to a bottom surface internal. Additionally, a second tubular string within the wellbore extends through the first tubular string. An outer ring of the second tubular string lands on the internal ring.

Abstract: A system and method for treatment of a subterranean formation are provided. The treatment includes pumping a water shut-off material into a wellbore and to a target zone in the subterranean formation and pumping a photo-curable polymer material to the target zone behind the water shut-off material, thereby forming a layer of photo-curable polymer material between the water shut-off material and the wellbore. An energy source may be directed to the layer of photo-curable polymer material until the layer of polymer solidifies to yield a solid barrier between the water shut-off material and the wellbore.

Abstract: Technical equilibrium can be used to measure a single gas isotherm in a relatively fast and continuous manner rather than, for example, in a batch manner. Further, an expansion vessel can be used for successive desorption a multicomponent gas in combination with determining the composition of the multicomponent gas in combination with a calculation that provides both qualitative and quantitative information about the multicomponent gas. Moreover, a multicomponent gas can be flowed through an adsorbent bed and the and the flow of the multicomponent gas flow is shut off and isolated when equilibrium is reached.