APPLICATIONS ■ Digital library archiving of the whole core ■ Determination of preservation needs prior to core removal from liner ■ Core analysis program tailored to core condition ■ Core sample location selection for physical and digital core analysis ■ Integrated reservoir analysis with well logs, core logs, and computed tomography (CT) images BENEFITS ■ High-resolution, dual-energy CT X-ray whole-core images and logs for core analysis ■ Visualization in Techlog* wellbore software platform and Techlog Viewer for effective data integration and analysis ■ Expansive applicable analysis tools via the Techlog platform ■ Detailed imaging of potential core locations and the ability to compare with FMI* fullbore formation microimager results FEATURES ■ CT images delivered with interactive CT-Scan Viewer in Techlog platform and Techlog Viewer ■ View of sagittal, coronal, and cylindrical unwrapped images together with cross-sectional images in one Techlog platform window ■ Integrated display of CT-derived density and photoelectric factor ■ Depth shifting ■ Use of Techlog platform tools for CT image analysis Core analysis is considered the ground truth within the industry. During the drilling process, significant investment is made to retrieve whole core for consecutive analyses that are often destructive in nature but necessary to obtain the petrophysical knowledge applied to exploration and production processes. Maximizing the return on this investment is a key aspect when planning whole-core acquisition and analysis. CT X-ray scanning digitally preserves the whole core and enables scientists and engineers to revisit the data anytime for further analysis and to put measurements obtained from subsamples into the appropriate context. The core is scanned with X-rays using a multislice, helical CT scanner that rapidly acquires a tomographic image of the rock. Slices are spaced as closely together as one-third of a millimeter over the entire length of the core, providing a high-resolution 3D digital archive of the whole core and a valuable dataset for analysis. The scans can be obtained while the rock is inside an aluminum or plastic liner, offering a quicklook at the condition of the core before it is removed from the protection of the liner. The information is used to put in place any needed preservation steps and to specifically tailor the core analysis program for the core condition. The scanner operates in dual-energy mode at two X-ray energies to solve for the bulk density and the effective atomic number. Both calculated properties are obtained at the same high resolution as the sliced images are. They provide initial insight into porosity and lithology heterogeneity over the entire length of the core. Whole-core CT scanning is only one of many whole-core profiling techniques; when combined with other whole-core analyses, such as strength index, core gamma log, and permeability profiling, a quick and comprehensive overview is acquired at high resolution on the reservoir scale. Whole-Core CT Scanning Service and CT-Scan Viewer in Techlog Platform Integrating whole-core CT images on the log scale State-of-the-art dual-energy, multislice, helical CT scanner.
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
APPLICATIONS ■ Digital library archiving of the whole core ■ Determination of preservation needs
prior to core removal from liner ■ Core analysis program tailored to
core condition ■ Core sample location selection for
physical and digital core analysis ■ Integrated reservoir analysis with
well logs, core logs, and computed tomography (CT) images
BENEFITS ■ High-resolution, dual-energy CT X-ray
whole-core images and logs for core analysis
■ Visualization in Techlog* wellbore software platform and Techlog Viewer for effective data integration and analysis
■ Expansive applicable analysis tools via the Techlog platform
■ Detailed imaging of potential core locations and the ability to compare with FMI* fullbore formation microimager results
FEATURES ■ CT images delivered with interactive
CT-Scan Viewer in Techlog platform and Techlog Viewer
■ View of sagittal, coronal, and cylindrical unwrapped images together with cross-sectional images in one Techlog platform window
■ Integrated display of CT-derived density and photoelectric factor
■ Depth shifting ■ Use of Techlog platform tools for CT
image analysis
Core analysis is considered the ground truth within the industry. During the drilling process, significant investment is made to retrieve whole core for consecutive analyses that are often destructive in nature but necessary to obtain the petrophysical knowledge applied to exploration and production processes. Maximizing the return on this investment is a key aspect when planning whole-core acquisition and analysis. CT X-ray scanning digitally preserves the whole core and enables scientists and engineers to revisit the data anytime for further analysis and to put measurements obtained from subsamples into the appropriate context.
The core is scanned with X-rays using a multislice, helical CT scanner that rapidly acquires a tomographic image of the rock. Slices are spaced as closely together as one-third of a millimeter over the entire length of the core, providing a high-resolution 3D digital archive of the whole core and a valuable dataset for analysis.
The scans can be obtained while the rock is inside an aluminum or plastic liner, offering a quicklook at the condition of the core before it is removed from the protection of the liner. The information is used to put in place any needed preservation steps and to specifically tailor the core analysis program for the core condition.
The scanner operates in dual-energy mode at two X-ray energies to solve for the bulk density and the effective atomic number. Both calculated properties are obtained at the same high resolution as the sliced images are. They provide initial insight into porosity and lithology heterogeneity over the entire length of the core.
Whole-core CT scanning is only one of many whole-core profiling techniques; when combined with other whole-core analyses, such as strength index, core gamma log, and permeability profiling, a quick and comprehensive overview is acquired at high resolution on the reservoir scale.
Whole-Core CT Scanning Service and CT-Scan Viewer in Techlog PlatformIntegrating whole-core CT images on the log scale
State-of-the-art dual-energy, multislice, helical CT scanner.
*Mark of SchlumbergerCopyright © 2018 Schlumberger. All rights reserved. 17-TP-235920
Whole-Core CT Service and CT-Scan Viewer in Techlog PlatformCrucial for the accessibility and usability of this information is the CT-Scan Viewer. The application is deployed within the Techlog platform and Techlog Viewer 2016.1. It enables viewing coronal, sagittal, and cylindrical unwrapped CT images together with the cross-sectional slices within a single window. The interactive application provides zoom for detailed feature analysis and a movie-like view through the core, both longitudinally and through the cross sections. CT-Scan Viewer has an intuitive user interface, with a single click at the desired depth on the log automatically providing the cross-section image and associated data.
The CT scan images are provided together with the associated CT-derived bulk density, effective atomic number, and photoelectric factor logs. These are either plotted in separate tracks or overlaid on the CT images as for any Techlog platform application.
The power of the Techlog platform is fully realized in its systematic, comprehensive data overview. The CT-Scan Viewer extends this feature by efficiently displaying CT logs and images and integrating them with well and core logs. All data can be displayed on the same depth scale via appropriate depth shifting to enable using all available core and log data for complete, scale-spanning reservoir analysis.
The integration of the CT-Scan Viewer into the Techlog platform provides analysis tools for the CT images that were previously not available. An example of this integration is heterogeneous rock analysis (HRA). Reviewing rock classification obtained via HRA in parallel with CT images is helpful when identifying samples for further analysis. While HRA sample selection can provide the most statistically representative sampling points within a rock class, the physical sample condition can be confirmed via the CT images.
slb.com/core
CT-Scan Viewer for full integration of well logs, core logs, and CT images in the Techlog platform.
Related Documents
