Borehole Imaging

Borehole Imaging

Technology to clearly visualize downhole geology

High-resolution images of the borehole help identify a variety of geological attributes. These images can also provide insight into the condition of the borehole, stress, and rock mechanics around the borehole, and assist in porosity determination.

The wealth of information provided by image logs has proven its value in reservoir characterization and optimization—from exploration to development. These logs allow you to quantify important structural and stratigraphic information like dip and azimuth of faults, fractures, bedding, and structures. Additionally, images also aid in the visualization and analysis of contacts, in-situ stress, textural variations, vugs, facies, crossbedding, and more.

Integrated as part of a comprehensive formation evaluation program, images help minimize the uncertainty of reservoir characterization. With extremely high-resolution and large azimuthal coverage, a comprehensive formation evaluation program with borehole images complements your conventional coring program. And, in some circumstances, it may be a viable, cost-effective alternative.

Two technology types are available for borehole imaging: microresistivity and acoustic. Because of the large dynamic range and high resolution, microresistivity images are very detailed. However, the coverage tends to degrade when borehole size increases. Acoustic imaging provides 360-degree borehole coverage, but acoustic reflectivity limits the dynamic range so images are less detailed than microresistivity.

AFR™ Azimuthal Focused Resistivity Sensor
Delivers high-resolution resistivity images for identifying dip, fractures, and borehole breakout. It also provides omni-directional, laterolog-type resistivity data, electrical images of the formation, and at-bit resistivity (ABR) measurements.
Oil Mud Reservoir Imager (OMRI™) Tool
Our Oil Mud Reservoir Imager (OMRI™) tool is a microresistivity imaging tool specially developed to work on wells drilled with oil-based mud. The tool generates crisp images of the borehole resistivity with an azimuthal resolution of 0.4 in. and a vertical resolution of 1 in. The tool has six articulated (in two axis) caliper arms. Each pad contains six resistivity sensors, providing a total of 36 microresistivity measurements circumferentially around the borehole.
Radian® Azimuthal Gamma Ray and Inclination Service
The Radian® azimuthal gamma ray and inclination service provides high-quality borehole images for geosteering, and precise gamma-ray measurements for reservoir evaluation.
X-tended Range Micro Imager (XRMI™) Tool
Our X-tended Range Micro Imager (XRMI™) tool is designed to obtain superior-quality images specifically in water-based mud environments. Powered by a 32-bit digital signal acquisition architecture and large excitation current, the XRMI tool delivers excellent signal-to-noise ratio and dynamic range. The result is high-resolution borehole images of your reservoir, even in highly resistive formations (Rt > 2000 ohm-m) or relatively salty borehole fluids...
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