Non-destructive imaging techniques provides a high-value complement for visualization and core assessment. Computed Tomography Scanners (CT), similar to medical applications, are used to capture a 3-Dimensional image of rocks. These images are taken when the cores arrive from the well sites and are still in their core barrels.
The Scanning Electron Microscope (SEM) images allow us to make a detailed characterization of the material surfaces with a focused beam of electrons. Different imaging techniques give qualitative and quantitative descriptions of:
Micro tomography is used to characterize the 3-Dimensional structures at the micrometer scales (20-200 times higher resolution than normal CT). This technology allows our clients to make a detailed characterization of plugs, which together with our Digital Rock tools allow to calculate properties such as: porosity, permeability, formation factor, capillary pressure, relative permeability’s, resistivity index, etc. This new technology allows us to quantify the effect of the pore-scale structure in global properties (e.g micro fractures, small vugs, clay contents, anomalies). MicroCT imaging can be applied to cores, plugs, unconsolidated samples, drill cuttings, etc. Some of the common services we perform for our clients are:
Dual Energy tomography of cores provides a detailed 3-dimensional showing density and atomic number variations. Special clustering techniques allow us to convert this information into different lithotypes. Dual-energy scanning can also be used in fluid flow visualization studies. These interesting qualitative and quantitative results can improve the understanding of complex rocks, especially carbonates. Applications of DECT include subsample selection, direct high-resolution density and atomic number images, porosity, lithotypes, etc. The use of this new technology constitutes a vital part of the core analysis programs.
Once these 3-dimensional images are captured, they are archived in a digital library which can be accessed whenever the clients want. We build, maintain and manage digital repositories taking care of data Integrity, access, backups, format obsolescence, etc. The main advantage of this technology is to provide our clients with their rock images in the state as they were extracted, without the effect of the time as in conventional rock storage. You can access your rocks within years after they were extracted.
From direct measurements to complex simulations, the 2D and 3D images are used to quantify global properties of the rock material in different states (cores, plugs, cuttings, etc.). The images at different scales are combined to obtain accurate results, such as:
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