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NARROW
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all geography including DSDP/ODP Sites and Legs
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well completion
Failure to launch: Fate of the Second White Specks as a resource play was preordained by its Late Cretaceous depositional setting
Simultaneous well spacing and completion optimization using an automated machine learning approach. A case study of the Marcellus Shale reservoir, northeastern United States
Development of fracture diagnostic methods for fluid distribution based on quantitative interpretation of distributed acoustic sensing and distributed temperature sensing
Properties of high-performing horizontal wells in the Midland Basin
Combining ground stability investigation with exploratory drilling for mine water geothermal energy development; lessons from exploration and monitoring
Predicting sonic and density logs from drilling parameters using temporal convolutional networks
Machine-learning-based automatic well-log completion and generation: Examples from the Ordos Basin, China
The effects of well damage and completion designs on geoelectrical responses in mature wellbore environments
Integrated reservoir, geology, and production data for reservoir damage analysis: A case study of the Miocene sandstone reservoir, Gulf of Suez, Egypt
Multidisciplinary analysis of hydraulic stimulation and production effects within the Niobrara and Codell reservoirs, Wattenberg Field, Colorado — Part 2: Analysis of hydraulic fracturing and production
Rock classification in the Eagle Ford Formation through integration of petrophysical, geological, geochemical, and geomechanical characterization
Induced seismicity risk management: The problem of disappearing faults
Casing integrity mapping using top-casing electrodes and surface-based electromagnetic fields
In situ stress distribution and mechanical stratigraphy in the Bowen and Surat basins, Queensland, Australia
Abstract: We present regional in situ stress analyses based on publicly available log and pressure data from coal seam gas developments in the Permian Bowen basin, Australia. Together with earlier data from the eastern part of the Jurassic Surat basin, our results show a broad, but systematic, rotation of S Hmax azimuths in this part of eastern Australia as well as systematic changes in stress state with depth. Overall, the geomechanical state of the region appears to reflect the interplay between basin-controlling structures and a complex far-field stress regime. At the reservoir level, within and between Permian coal seams, this stress complexity is reflected in highly variable stress states both vertically and laterally. Stress data, including direct pressure measurements and observations of borehole failure in image logs, have been used to calibrate sonic-derived one-dimensional wellbore stress models that consistently exhibit a change in tectonic stress regime with depth. Shallow depths (<600 m) are characterized by a reverse-thrust stress regime and deeper levels are characterized by a strike-slip regime. Changes in the stress state with depth influence the mechanical stratigraphy of rocks with widely contrasting mechanical attributes (coals and clastic sediments). Our results highlight the interdependency between regional tectonic, local structural and detailed rheological influences on the well scale geomechanical conditions that have to be taken into consideration in drilling and completion designs. Supplementary material: Database of additional wells with image log data are available at https://doi.org/10.6084/m9.figshare.c.3785849
THE APPLICATION OF MHF TO THE TIGHT MUDDY “J” FORMATION WATTENBERG FIELD, COLORADO
Abstract We are plagued by a definition. To the engineering enthusiast, Engineering Geology may mean aspects of geology that help the engineer, just as one of his many tools aids a carpenter. To the geological zealot, Geologic Engineering may mean aspects of geology that should control the planning and performance of work that is primarily engineering. I n the present discussion, both the use df engineering tools and methods by the geologist, and of geological facts and theory by the engineer, are classed as Geologic Engineering.