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Halliburton successfully developed a position-in-focus resistivity instrument while drilling
Resistivity borehole imaging logging is essential in modern formation evaluation, particularly in high-angle or horizontal wells, as well as in complex geological settings. Due to the rotation of the drill string and the typically low mechanical drilling speed, achieving uniform azimuth coverage and high data density becomes challenging. As a result, water-based mud logging while drilling has emerged as a promising resistivity imaging technique that offers reliable and continuous data acquisition.
Halliburton’s newly developed Azimuth Focusing Resistivity (AFR) tool integrates high-resolution resistivity imaging with deep-reading lateral logging capabilities, delivering three key measurements: omnidirectional lateral resistivity data, detailed formation resistivity images, and real-time resistivity readings at the drill bit. This advanced technology enables more accurate and comprehensive subsurface characterization.
The AFR instrument offers several key benefits. It provides high-resolution images that help identify fractures, thin layers, and formation dips. These images can be visualized within the Strata Steer 3D geosteering model, allowing for better well placement and maintaining the borehole within the target pay zone. Additionally, it improves log interpretation in highly conductive mud environments and high-resistance formations by delivering precise resistivity values. The real-time resistivity measurements at the bit also offer insights into fluid type and lithology changes, supporting faster and more informed on-the-fly decisions during drilling operations.
By combining accuracy, resolution, and real-time capability, the AFR system enhances drilling efficiency and reservoir understanding, making it a valuable tool in today’s challenging and dynamic drilling environments.