APS has developed this sub to add to its Logging While Drilling (LWD) system, complementing its existing Wave Propagation Resistivity (WPR) LWD measurements tool. APS’s SureLog-AZG azimuthal gamma ray sensor enables accurate geosteering by adding imaging capabilities to existing APS Measurement-While-Drilling/Logging-While-Drilling (MWD/LWD) product line measurements. The sensor employs three ruggedized, shielded gamma ray detectors with photomultiplier tubes and a directional package that are mounted in a specially designed collar-based system. This system provides protection against the high levels of shock and vibration experienced during drilling, while also providing maximum measurement sensitivity to the formation.
This new sensor is designed specifically for low power consumption. APS’s azimuthal gamma ray sensor can be programmed to acquire gamma ray data in up to 24 azimuthally sectored bins around the borehole, as well as provide a total gamma ray measurement. Binned data and total gamma data are both recorded in memory and telemetered to the surface for real-time steering decisions. The azimuthal gamma sensor is also capable of providing a calibrated API-standard gamma ray response.
APS’s advanced systems are powered by a turbine alternator in configurable combination with batteries to accommodate both LWD and Logging While Tripping (LWT). All LWD sensor subs can be used at typical flow rates (maximum 1,200 gpm or 76 l/sec) and to 347°F (175°C).
Azimuthal Gamma Ray Sensor (AZG™)
APS Technology’s SureLog™ azimuthal gamma ray (AZG™) sensor enables accurate geosteering by adding imaging capabilities to existing APS Measurement-WhileDrilling/Logging-While-Drilling (MWD/LWD) measurements. This sensor employs three ruggedized, shielded gamma ray detectors with photomultiplier tubes along with a directional package, which are mounted in a specially designed collar-based system. This system provides protection against the high levels of shock and vibration experienced during drilling, while also providing maximum measurement sensitivity to the formation. This new sensor is designed specifically for low power consumption and is backward compatible with APS’s (MWD) system, including the WPR™ resistivity sensor.
APS’s azimuthal gamma ray sensor can be programmed to acquire gamma ray data in up to 24 azimuthally sectored bins around the borehole, as well as provide a total gamma ray measurement. Binned data and total gamma data are both recorded in memory and telemetered to the surface for real-time steering decisions. The APS azimuthal gamma sensor is also capable of providing a calibrated API-standard gamma ray response. A well site check source is available to ensure proper pre/post run operational performance, both for use in the field and at the maintenance facility.
The easy-to-use SureLog surface system scales the gamma ray readings to API units, correcting for borehole size, mud weight, collar effects and KCl content of the drilling fluid. The SureLog system is capable of displaying both the total gamma ray log and the gamma image log in real time and as memory log plots. In addition to the log plot displays, the surface system provides user-defined hard copy output logs. Data can be exported in standard log copy formats such as WITS, LAS and ASCII.
APPLICATIONS：Geosteering
FEATURES & BENEFITS
Can be programmed to acquire gamma ray data in up to 24 azimuthally sectored bins around the borehole, as well as provide a total gamma ray measurement.
Binned data and total gamma data are both recorded in memory and telemetered to the surface for real-time steering decisions.
Capable of providing a calibrated, API-standard gamma ray response.
A wellsite check source is available to ensure proper pre/post run operational performance, both for use in the field and at the maintenance facility.
Easy-to-use SureLog surface system scales the gamma ray readings to API units, correcting for
borehole size, mud weight, collar effects and KCl content of the drilling fluid. Capable of displaying both the total gamma ray log and the gamma image log in real time and as memory log plots.
In addition to the log plot displays, the surface system provides user-defined hard copy output logs.
Data can be exported in standard log copy formats such as WITS, LAS and ASCII.
DESIGN
Available sizes: 4.75 and 6.75 in. (121 and 171 mm).
Employs three ruggedized, shielded gamma ray detectors with photomultiplier tubes along with a directional package.
Mounted in a specially designed, collar-based system, providing protection against the high levels of shock and vibration experienced during drilling along with maximum measurement sensitivity to the formation.
About APS Technology, Inc.
APS Technology delivers field performance and design confidence worldwide for all your oilfield and harsh environment needs. From the minds of our highly experienced engineers, technicians, toolmakers and machinists come the world’s most reliable and advanced electromechanical, instrumentation and sensor designs for the oilfield and other harsh environments.
Make APS your trusted source for products and designs purpose-built to operate under high shock, vibration, temperature, pressure, fluid flow and harmful gas conditions.
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