Aspects of the subject technology relate to systems and methods for identifying values of mud and formation parameters based on measurements gathered by an electromagnetic imager tool through machine learning. One or more regression functions that model mud and formation parameters capable of being identified through an electromagnetic imager tool as a function of possible tool measurements of the electromagnetic imager tool can be generated using a known dataset associated with the electromagnetic imager tool. One or more tool measurements obtained by the electromagnetic imager tool operating to log a wellbore can be gathered. As follows, one or more values of the mud and formation parameters can be identified by applying the one or more regression functions to the one or more tool measurements.

Aspects of the subject technology relate to systems and methods for identifying values of mud and formation parameters based on measurements gathered by an electromagnetic imager tool through machine learning. One or more regression functions that model mud and formation parameters capable of being identified through an electromagnetic imager tool as a function of possible tool measurements of the electromagnetic imager tool can be generated using a known dataset associated with the electromagnetic imager tool. One or more tool measurements obtained by the electromagnetic imager tool operating to log a wellbore can be gathered. As follows, one or more values of the mud and formation parameters can be identified by applying the one or more regression functions to the one or more tool measurements.

A formation monitoring well system accurately measures formation electrical properties behind the casing to determine water-oil contact positions and/or to assess the integrity of the cement seal over the life of the well. The well system includes a casing string having one or more formation monitoring modules embedded therein, each having a toroid sensor.

During operation, current is provided to the casing string, and the toroid measures the current flowing into the formation. Also, the voltage drop between the sensor and an electrode positioned between the cement layer and formation may be measured. This data may then be processed to determine the resistivities of the formation and/or cement layer, whereby the cement seal quality, water-oil contact surface position, etc. may be extracted from the results.

A formation monitoring well system accurately measures formation electrical properties behind the casing to determine water-oil contact positions and/or to assess the integrity of the cement seal over the life of the well. The well system includes a casing string having one or more formation monitoring modules embedded therein, each having a toroid sensor.

During operation, current is provided to the casing string, and the toroid measures the current flowing into the formation. Also, the voltage drop between the sensor and an electrode positioned between the cement layer and formation may be measured. This data may then be processed to determine the resistivities of the formation and/or cement layer, whereby the cement seal quality, water-oil contact surface position, etc. may be extracted from the results.

Apparatus, systems, and methods are disclosed. In some embodiments, an apparatus comprises a stabilizer element attached to a downhole tool housing. The stabilizer element includes at least a portion of a surface that is not parallel to a longitudinal axis of the tool housing, and that does not contact a borehole wall during operation. An electrode element is attached to the portion of the surface.

Apparatus, systems, and methods are disclosed. In some embodiments, an apparatus comprises a stabilizer element attached to a downhole tool housing. The stabilizer element includes at least a portion of a surface that is not parallel to a longitudinal axis of the tool housing, and that does not contact a borehole wall during operation. An electrode element is attached to the portion of the surface.

A system and method for monitoring a wellbore are disclosed herein. A pulse generator comprises a plurality of ports, wherein a first one of the plurality of ports is coupled to a first location of interest and a second one of the plurality of ports is coupled to a second location of interest. An electromagnetic pulse is generated at the first port and the second port. A reflected electromagnetic pulse is received at the first port and the second port. In another embodiment, the pulses are received at a separate pulse receiver with a plurality of receiving ports. A data storage device is coupled to the pulse generator or the pulse receiver, and data relating to the reflected magnetic pulse is stored at the data storage device.

A system and method for monitoring a wellbore are disclosed herein. A pulse generator comprises a plurality of ports, wherein a first one of the plurality of ports is coupled to a first location of interest and a second one of the plurality of ports is coupled to a second location of interest. An electromagnetic pulse is generated at the first port and the second port. A reflected electromagnetic pulse is received at the first port and the second port. In another embodiment, the pulses are received at a separate pulse receiver with a plurality of receiving ports. A data storage device is coupled to the pulse generator or the pulse receiver, and data relating to the reflected magnetic pulse is stored at the data storage device.

A method and a resistivity image logging tool connected or connectable to one or more processing devices process geological log data to construct missing information from destroyed or occluded parts using cues from observed data. The geological log data signals can be generated through use of the logging tool having one or more electrodes interacting with a formation intersected by a borehole. The processing involves the steps of: in respect of one or more data dimensions associated with missing values in a log data set, decomposing the signal into a plurality of morphological components; and morphologically reconstructing the signal such that missing values are estimated.

A logging while drilling tool for measuring a geological formation surrounding a wellbore includes a tool body having one or more sensor pads. Each sensor pad is coupled to the tool body by an extendable coupling that is operable to adjust the radial position of the sensor pad by extending away from or retracting toward the tool body. One or more sensors are mounted to each sensor pads and the sensors are operable to obtain a measurement a property of the formation. The tool also includes a downhole control unit having a transmitter and receiver. The downhole control unit is operable to receive the measurement and transmit the measurement to a surface controller, wherein the transmitted measurement indicates a measurement resolution.