Abstract: Multi-phase measurements of a fluid in a wellbore can be received and stored by a memory tool for determining flow characteristics of fluid flowing in the wellbore. A system can include a flow meter device, one or more sensors, and a memory tool The flow meter device can include one or more acoustic devices that can be positioned to generate acoustic signals in a wellbore. The one or more sensors can be positioned to detect the acoustic signals from the flow meter device for making multi-phase measurements of fluid with respect to the wellbore. The memory tool can be communicatively coupled to the one or more sensors to receive and store the multi-phase measurements for a predetermined amount of time for determining flow characteristics of the fluid.

Abstract: A downhole energy harvesting apparatus comprising a fluidic oscillator comprising: an inlet channel configured to receive fluid from a wellbore, a feedback system coupled to the inlet channel to oscillate the fluid, and an outlet channel coupled to the feedback system and configured to receive the oscillated fluid from the feedback system, and at least one piezoelectric element disposed on at least one side of the outlet channel and configured to generate an electric signal in response to variations in pressure of the oscillated fluid.

Abstract: Multi-phase measurements of a fluid in a wellbore can be received and stored by a memory tool for determining flow characteristics of fluid flowing in the wellbore. A system can include a flow meter device, one or more sensors, and a memory tool The flow meter device can include one or more acoustic devices that can be positioned to generate acoustic signals in a wellbore. The one or more sensors can be positioned to detect the acoustic signals from the flow meter device for making multi-phase measurements of fluid with respect to the wellbore. The memory tool can be communicatively coupled to the one or more sensors to receive and store the multi-phase measurements for a predetermined amount of time for determining flow characteristics of the fluid.

Abstract: A system for making multi-phase measurements of a fluid includes a flow meter device and a computing device. The flow meter device can include one or more acoustic devices that can generate acoustic signals in a wellbore. The computing device can receive acoustic signals from the flow meter device and determine an arrangement of the one or more acoustic devices with respect to the wellbore. The computing device can interpret the acoustic signals using the determined arrangement of the one or more acoustic devices to make a multi-phase measurement of fluid with respect to the wellbore.

Abstract: A system can determine multi-phase measurements with respect to a wellbore. The system can include a set of acoustic devices, a measurement device, and a computing device. The set of acoustic devices can be positioned at the surface of a wellbore to generate acoustic signals proportional to flow of fluid with respect to the wellbore. The measurement device can be positioned with respect to the set of acoustic devices to sense the acoustic signals. The computing device can be communicatively coupled to the measurement device to interpret the acoustic signals for determining a type of the fluid and a ratio of one or more phases of the fluid.

Abstract: A downhole energy harvesting apparatus comprising a fluidic oscillator comprising: an inlet channel configured to receive fluid from a wellbore, a feedback system coupled to the inlet channel to oscillate the fluid, and an outlet channel coupled to the feedback system and configured to receive the oscillated fluid from the feedback system, and at least one piezoelectric element disposed on at least one side of the outlet channel and configured to generate an electric signal in response to variations in pressure of the oscillated fluid.

Abstract: A method can be used to determine multi-phase measurements of fluid flowing with respect to a wellbore. Signals can be received, and the signals can be emitted by each variable frequency acoustic emitter of a set of variable frequency acoustic emitters positioned spaced apart in a sensing transducer that is in an interior of a wellbore. The received signals can be converted into a flow rate of each of a set of different fluid phases of a fluid in the wellbore. The multi-phase measurements of the fluid can be determined using the converted flow rate.

Abstract: Disclosed herein are various embodiments of methods and systems for determining the orientation and direction of first motion of a fault or fracture by optimizing an azimuthally-dependent attribute of signals generated by microseismic sources, comprising: recording microseismic data traces using a of sensors located at a plurality of sensor positions; subdividing the subsurface volume into spatial volumes corresponding to selected time intervals and comprising a plurality of voxels; for each voxel, applying a time shift to the microseismic data traces that is substantially equal to a travel time from each voxel to the corresponding sensor position, and determining for the voxel the orientation and direction of first motion of the fault or fracture corresponding to a maximum value for the voxel of at least one azimuthally-dependent attribute of the microseismic data traces.

Abstract: Disclosed herein are various embodiments of methods and systems for determining the orientation and direction of first motion of a fault or fracture by optimizing an azimuthally-dependent attribute of signals generated by microseismic sources, comprising: recording microseismic data traces using a of sensors located at a plurality of sensor positions; subdividing the subsurface volume into spatial volumes corresponding to selected time intervals and comprising a plurality of voxels; for each voxel, applying a time shift to the microseismic data traces that is substantially equal to a travel time from each voxel to the corresponding sensor position, and determining for the voxel the orientation and direction of first motion of the fault or fracture corresponding to a maximum value for the voxel of at least one azimuthally-dependent attribute of the microseismic data traces.