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This is an open access book. In view of growing conflicts over strategic georesources, the use of the geological subsurface in the sense of a regional resource is becoming increasingly important. In this context, georeservoirs are playing an important role for the energy transition not only as a source of energy but also as a storage facility and deep geological disposal for energy waste. The success of the energy transition also depends to a large extent on the efficient and safe use of underground resources. This book complements the previous basic book (GeomInt—Integrity of Host Rocks) with a series of application examples in different rock formations, clay, salt, and crystalline. The m...
This open access book summarizes the results of the collaborative project “GeomInt: Geomechanical integrity of host and barrier rocks - experiment, modeling and analysis of discontinuities” within the Program: Geo Research for Sustainability (GEO: N) of the Federal Ministry of Education and Research (BMBF). The use of geosystems as a source of resources, a storage space, for installing underground municipal or traffic infrastructure has become much more intensive and diverse in recent years. Increasing utilization of the geological environment requires careful analyses of the rock–fluid systems as well as assessments of the feasibility, efficiency and environmental impacts of the techn...
The revised versions of lectures given at the Summer Convention on Information Extraction, SCIE 2002, held in Frascati, Italy in July 2002. The following lectures by leading authorities in the field of information extraction are included: - acquisition of domain knowledge - terminology mining - finite-state approaches to Web IE - measuring term representatives - agent-based ontological mediation in IE systems - information retrieval and IE in question answering systems - natural language communication with virtual actors
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The latest oil and gas well completion technologies and best practices Increase oil and gas production and maximize revenue generation using the start-to-finish completion procedures contained in this hands-on guide. Written by a pair of energy production experts, Modern Completion Technology for Oil and Gas Wells introduces each technique, shows how it works, and teaches how to deploy it effectively. You will get full explanations of the goals of completion along with detailed examples and case studies that clearly demonstrate how to successfully meet those goals. Modern production methods such as hydraulic fracturing, acid simulation, and intelligent well completions are thoroughly covered. Coverage includes: •Functions and goals of oil and gas well completion •Well completion fundamentals •Completion impact in near-wellbore region to inflow performance •Completions for fracturing •Completions for acid stimulation •Intelligent well completion: downhole monitoring and flow control •Completion designs for production and injection optimization
Presenting original results from both theoretical and numerical viewpoints, this text offers a detailed discussion of the variational approach to brittle fracture. This approach views crack growth as the result of a competition between bulk and surface energy, treating crack evolution from its initiation all the way to the failure of a sample. The authors model crack initiation, crack path, and crack extension for arbitrary geometries and loads.