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.