Azimuthal Gamma Ray at the Bit

Intelligent Formation Correlation: Machine learning algorithms for automatic marker bed identification

Real-Time Structural Interpretation: 3D well trajectory projection combined with formation dip inversion

Rapid Interface Integration.

Product Details

System Overview

Azimuthal Gamma Ray at the Bit system represents the next-generation core logging-while-drilling (LWD) technology for geosteering applications. Utilizing 360° omnidirectional gamma ray imaging technology, this system acquires real-time formation radioactivity characteristics at only 0.8m behind the bit. Integrated with high-resolution azimuthal measurement capabilities, it provides centimeter-level geological resolution for thin-bed identification (<1m), fault crossing, and sweet spot optimization, significantly improving reservoir contact rates in complex hydrocarbon formations.

Classification	Subitem	Technical Parameters/Description
Core Technical Features
1 Azimuthal Gamma Detection System	Detector Array	16-sector NaI(Tl) crystal detectors, energy resolution 7%@662keV; dynamic range 0-1000 API, nonlinear error <±2%
	Sampling Characteristics	5cm vertical sampling interval (4× improvement over conventional LWD); 22.5° azimuthal resolution, 4 full rotations scanned per second
2 Near-Bit Dynamic Measurement	3-Axis Inertial Navigation	MEMS gyroscope (bias stability 0.1°/h); inclination measurement accuracy ±0.15° (0.5m from bit)
	Synchronized Drilling Parameters	WOB/torque measurement (range 0-50kN/±5kN·m); vibration spectrum analysis (0-200Hz bandwidth)
3 Extreme Environment Adaptability	Pressure-Resistant Design	175MPa pressure housing (API 19G compliant), titanium alloy protector (50g shock resistance)
	Thermal Management	High-temperature electronics (HT-200 grade), heat pipe assisted cooling, continuous operation at 150°C
Technological Innovations	Intelligent Formation Correlation	Machine learning algorithms for automatic marker bed identification
	Real-Time Structural Interpretation	3D well trajectory projection combined with formation dip inversion
	Rapid Interface Integration	Seamless data fusion with AutoTrak rotary steerable system (<0.2s latency)
Typical Operation Performance	Thin-bed Identification Capability	0.6m thin reservoir drilling success rate of 92% in Ordos Basin tight oil layers
	Response Speed	3-5m ahead of conventional LWD in detecting formation interface changes
	Reliability Index	MTBF 1200 hours (validated in 1000ppm H₂S environment)
Technical Evolution Direction	Spectral Gamma Expansion	Real-time analysis of K/U/Th element contents
	Fiber Optic Sensing Integration	Distributed temperature/vibration synchronous monitoring
	Digital Twin Application	Real-time geological modeling with DecisionSpace platform

This system has been deployed in over 300 wells across key plays including Sichuan shale gas and Xinjiang Mahu tight oil, demonstrating 25% average ROP improvement and elevating geological target contact rates to 98.7%. Its "near-bit + high-density sampling" architecture establishes new industry benchmarks for geosteering technology.