Abstract: Neutron activation measurement techniques may be used to evaluate various properties of a subterranean well structure. In an example implementation, a logging tool can be positioned within a wellbore, such that neutrons generated by a neutron source are directed towards well structure. In response to the neutrons, the well structure emits gamma rays. A portion of the gamma rays can be detected by a gamma detector. To enhance the well structure's response to neutron activation, the well structure can be constructed of materials that include one or more doping materials. The inclusion of these doping materials can increase the number of gamma rays that are emitted when neutrons are directed into the well structure, and these emitted gamma rays can be more easily identified based on their energy level.

Abstract: Neutron activation measurement techniques may be used to evaluate various properties of a subterranean well structure. In an example implementation, a logging tool can be positioned within a wellbore, such that neutrons generated by a neutron source are directed towards well structure. In response to the neutrons, the well structure emits gamma rays. A portion of the gamma rays can be detected by a gamma detector. To enhance the well structure's response to neutron activation, the well structure can be constructed of materials that include one or more doping materials. The inclusion of these doping materials can increase the number of gamma rays that are emitted when neutrons are directed into the well structure, and these emitted gamma rays can be more easily identified based on their energy level.

Abstract: A through casing formation evaluation tool string 1000, 2000, 3000 including a conveyance string 100, a sonic array tool 200, a pulsed neutron tool 400 and one or more downhole memory modules 160, 540, 550. A method of through casing formation evaluation and casing and cementing integrity evaluation includes lowering a tool string into a cased wellbore; concurrently collecting data with the sonic array tool and pulsed neutron tool and transmitting at least a portion of the collected data via a conveyance string to a CPU located at the surface of the earth; storing a portion of the collected data in a memory module disposed in the tool string; removing the tool string from the wellbore; processing the collected data in the CPU to obtain selected rock property data about the one or more of the geologic formations and/or cement integrity.

Abstract: A through casing formation evaluation tool string 1000, 2000, 3000 including a conveyance string 100, a sonic array tool 200, a pulsed neutron tool 400 and one or more downhole memory modules 160, 540, 550. A method of through casing formation evaluation and casing and cementing integrity evaluation includes lowering a tool string into a cased wellbore; concurrently collecting data with the sonic array tool and pulsed neutron tool and transmitting at least a portion of the collected data via a conveyance string to a CPU located at the surface of the earth; storing a portion of the collected data in a memory module disposed in the tool string; removing the tool string from the wellbore; processing the collected data in the CPU to obtain selected rock property data about the one or more of the geologic formations and/or cement integrity.

Abstract: A through casing formation evaluation tool string 1000, 2000, 3000 including a conveyance string 100, a sonic array tool 200, a pulsed neutron tool 400 and one or more downhole memory modules 160, 540, 550. A method of through casing formation evaluation and casing and cementing integrity evaluation includes lowering a tool string into a cased wellbore; concurrently collecting data with the sonic array tool and pulsed neutron tool and transmitting at least a portion of the collected data via a conveyance string to a CPU located at the surface of the earth; storing a portion of the collected data in a memory module disposed in the tool string; removing the tool string from the wellbore; processing the collected data in the CPU to obtain selected rock property data about the one or more of the geologic formations and/or cement integrity.

Abstract: A through casing formation evaluation tool string 1000, 2000, 3000 including a conveyance string 100, a sonic array tool 200, a pulsed neutron tool 400 and one or more downhole memory modules 160, 540, 550. A method of through casing formation evaluation and casing and cementing integrity evaluation includes lowering a tool string into a cased wellbore; concurrently collecting data with the sonic array tool and pulsed neutron tool and transmitting at least a portion of the collected data via a conveyance string to a CPU located at the surface of the earth; storing a portion of the collected data in a memory module disposed in the tool string; removing the tool string from the wellbore; processing the collected data in the CPU to obtain selected rock property data about the one or more of the geologic formations and/or cement integrity.

Abstract: A through casing formation evaluation tool string 1000, 2000, 3000 including a conveyance string 100, a sonic array tool 200, a pulsed neutron tool 400 and one or more downhole memory modules 160, 540, 550. A method of through casing formation evaluation and casing and cementing integrity evaluation includes lowering a tool string into a cased wellbore; concurrently collecting data with the sonic array tool and pulsed neutron tool and transmitting at least a portion of the collected data via a conveyance string to a CPU located at the surface of the earth; storing a portion of the collected data in a memory module disposed in the tool string; removing the tool string from the wellbore; processing the collected data in the CPU to obtain selected rock property data about the one or more of the geologic formations and/or cement integrity.

Abstract: A through casing formation evaluation tool string 1000, 2000, 3000 including a conveyance string 100, a sonic array tool 200, a pulsed neutron tool 400 and one or more downhole memory modules 160, 540, 550. A method of through casing formation evaluation and casing and cementing integrity evaluation includes lowering a tool string into a cased wellbore; concurrently collecting data with the sonic array tool and pulsed neutron tool and transmitting at least a portion of the collected data via a conveyance string to a CPU located at the surface of the earth; storing a portion of the collected data in a memory module disposed in the tool string; removing the tool string from the wellbore; processing the collected data in the CPU to obtain selected rock property data about the one or more of the geologic formations and/or cement integrity.