摘要:
Improved apparatus and methods for non-invasively assessing one or more hemodynamic parameters associated with the circulatory system of a living organism. In one aspect, the invention comprises apparatus adapted to accurately place and maintain a sensor (e.g., tonometric pressure sensor) with respect to the anatomy of the subject, including an alignment apparatus which is separable from an adjustable fixture. The apparatus moveably captures the sensor to, inter alia, facilitate-coupling thereof to an actuator used to position the sensor during measurements. In a second aspect, improved sensor apparatus is disclosed adapted to minimize the effects of shear during sensor movement and monitoring as well as maximize the lateral and proximal search area available to the sensor within the apparatus. Methods for positioning the alignment apparatus and sensor are also disclosed.
摘要:
Improved apparatus and methods for non-invasively assessing one or more hemodynamic parameters associated with the circulatory system of a living organism. In one aspect, the invention comprises apparatus adapted to accurately place and maintain a sensor (e.g., tonometric pressure sensor) with respect to the anatomy of the subject, including an alignment apparatus which is separable from an adjustable fixture. The apparatus moveably captures the sensor to, inter alia, facilitate coupling thereof to an actuator used to position the sensor during measurements. In a second aspect, improved sensor apparatus is disclosed adapted to minimize the effects of shear during sensor movement and monitoring as well as maximize the lateral and proximal search area available to the sensor within the apparatus. Methods for positioning the alignment apparatus and sensor are also disclosed.
摘要:
In or near real-time monitoring of fluids can take place using an opticoanalytical device that is configured for monitoring the fluid. Fluids can be monitored prior to or during their introduction into a subterranean formation using the opticoanalytical devices. Produced fluids from a subterranean formation can be monitored in a like manner. The methods can comprise providing at least one fracturing fluid component; combining the at least one fracturing fluid component with a base fluid to form a fracturing fluid; and monitoring a characteristic of the fracturing fluid using a first opticoanalytical device that is in optical communication with a flow pathway for transporting the fracturing fluid.
摘要:
Various systems and methods for performing optical analysis downhole with an interferogram (a light beam having frequency components with a time variation that identifies those frequency components. The interferogram is produced by introducing an interferometer into the light path, with the two arms of the interferometer having a propagation time difference that varies as a function of time. Before or after the interferometer, the light encounters a material to be analyzed, such as a fluid sample from the formation, a borehole fluid sample, a core sample, or a portion of the borehole wall. The spectral characteristics of the material are imprinted on the light beam and can be readily analyzed by processing electronics that perform a Fourier Transform to obtain the spectrum or that enable a comparison with one or more templates. An interferometer designed to perform well in the hostile environments downhole is expected to enable laboratory-quality measurements.
摘要:
Apparatus, systems, and methods may operate to discharge a plurality of spike fluids into a fluid flowing in a flow channel, transmit energy to the fluid using an energy source coupled to the flow channel, receive the energy modified by the fluid as photometric energy, convert the photometric energy to at least one photometric signal, compare the at least one photometric signal with a reference signal to determine at least one photometric property of the fluid, and determine at least one component of the fluid using the at least one photometric property supplied to a generalized standard addition method (GSAM). Additional apparatus, systems, and methods, including the use of multivariate curve resolution (MCR) to refine GSAM results, are disclosed.
摘要:
Embodiments of the present invention relate to a method to determine formation measurements, the method comprising placing a sample in a reservoir, removing aliquots from the reservoir containing the sample or continuously monitoring the reservoir or headspace as the sample and reservoir equilibrate and analyzing the aliquots or readings sufficient to provide diffusion measurements.
摘要:
A system for drilling a wellbore includes a prediction unit operable to predict a change in a drilling event while the wellbore is being drilled and prior to the drilling event change occurring. The prediction unit monitors surface and downhole data and well inflows to predict drilling events. The prediction unit may activate alarms for predefined drilling conditions, such as a kick alarm to provide an early warning of a dangerous influx of formation fluids into the wellbore.
摘要:
A method for analyzing reservoir fluids in connection with a drilling operation includes determining composition and isotopes of injection fluids injected into a wellbore during a drilling operation and production fluids recovered from the wellbore during the drilling operation. Reservoir fluids from a reservoir intersected by the wellbore are characterized based on the composition and isotopes of the injection fluid and of the production fluid.
摘要:
A geographically based lottery game is described where prizes are allocated based on the geographic location or residence of the lottery player. The lottery terminal determines the player's residence and sets parameters for the lottery ticket, such as the count of symbols to be picked and the range of the symbols. Prizes are then awarded within the geographic area.
摘要:
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.