摘要:
A drill bit analysis and optimization system for use in a wellbore is provided. The system includes a drill bit including a cutter, a sensor that collects a data signal on a surface of the drill bit proximate to the cutter, and a signal processor unit that receives the data signal from the sensor and receives the expected drilling properties from the data reservoir. The processor analyzes the data signal to detect a resistivity profile from the sensor through a formation and optimizes a drilling parameter by comparing actual drilling properties with expected drilling properties.
摘要:
The operational position of a moveable device is detected using a magnetic-type logging tool. The logging tool generates a baseline log of the moveable device in a non-actuated position, and a response log of the moveable device in an actuated position. The baseline and response logs are then compared in order to determine the operational position of the moveable device.
摘要:
Various embodiments include apparatus and methods providing a tool to characterize a fracture in formation. Such a tool can use electromagnetic logging data that can be acquired in a processing unit to operate on the data using a fracture model that represents a fracture by an electrically thin sheet. Additional apparatus, systems, and methods are disclosed.
摘要:
The disclosure concerns a device for obtaining electromagnetic measurements in a wellbore. In one implementation, the device includes an electromagnetic source carried by the device and a metamaterial arranged to cover a portion of the device in order to divert electromagnetic waves from the source around the covered portion of the device. In one version, the electromagnetic radiation from the source impinging on the portion of the device covered by the metamaterial, and on the electronics carried by the devices that are covered by the metamaterial is reduced. Depending on the implementation, the electromagnetic source may be an antenna, such as a coil antenna. Also, the antenna coil may be wrapped circumferentially around the tool.
摘要:
A spontaneous (SP) monitoring system includes a plurality of EM field sensors positioned in a downhole environment. The SP monitoring system also includes a processing unit in communication with the plurality of EM field sensors. The processing unit determines SP data for the downhole environment using a multi-frequency SP model and EM field measurements collected by the plurality of EM field sensors. The processing unit performs an inversion process based at least in part on the SP data to obtain a model of subsurface fluid.
摘要:
A pipe inspection tool includes a body having a central axis, and one or more azimuthal antenna arrays operatively coupled to the body. Each azimuthal antenna array includes a plurality of antenna coils arranged circumferentially about the central axis and comprising an azimuthal array of z-coils or an azimuthal array of separated x-coils and separated y-coils. The separated x-coils are oriented in a first direction with respect to the central axis, the separated y-coils are oriented in a second direction with respect to the central axis, and the z-coils are oriented in a third direction with respect to the central axis. The second direction is orthogonal to the first direction, and the third direction is orthogonal to both the first and second directions.
摘要:
Disclosed are systems and method for providing compensated measurements for more accurate downhole measurement data. One measurement system includes at least two transmitters and at least two receivers disposed within at least one borehole formed in a subterranean formation, and a data acquisition system communicably coupled to the at least two transmitters and the at least two receivers and configured to activate the at least two transmitters and process time-lapsed signals received from the at least two receivers in order to generate compensated signals that minimize or eliminate multiplicative effects.
摘要:
A method for three dimensional visualization and manipulation of downhole data. A measured signal is received a downhole environment and a three dimensional virtualization of the measured signal is generated. A stereographic viewer displays the three dimensional virtualization of the measured signal. The three dimensional virtualization can be manipulated in response to an input from a user, thereby creating a manipulated three dimensional virtualization. The stereographic viewer can display the manipulated three dimensional virtualization.
摘要:
A well monitoring system includes a plurality of transmitter coils coupled to an exterior of a casing positioned within a wellbore, wherein one or more first transmitter coils are positioned at a first location and one or more second transmitter coils are positioned at a second location axially offset from the first location. At least one receiver coil is coupled to the exterior of the casing and positioned at the second location. A power source is communicably coupled to the one or more first and second transmitter coils. The one or more first transmitter coils generates a magnetic field detectable by the at least one receiver coil, and the one or more second transmitter coils generates a bucking signal that minimizes a direct coupling between the one or more first transmitter coils and the at least one receiver coil.
摘要:
A system for well comparison, comprising at least one electromagnetic field generator shaped for insertion into a first well and capable of generating an electromagnetic field; at least one detector capable of measuring in the second well the field generated in the first well; wherein the first well is substantially perpendicular to the second well; and wherein measurements of the field of the at least one generator are capable of being used to calculate a distance, direction or curvature of the second well with respect to the first well.