The overall objective is to introduce to entry level geophysicists, seismic interpreters and geologists, petrophysicists, and reservoir engineers the key concepts and principles of seismic data acquisition, seismic data processing and seismic interpretation, that form the technical basis for value added seismic applications in exploration, field appraisal and reservoir management. Emphasis is on the fundamental and practical understanding of the technical requirements for extraction of geophysical, geological and rock property information. Data examples and exercises are used to illustrate key concepts, practical issues and pitfalls as they affect seismic data quality and interpretation.
The course starts with an introduction in elasticity theory, rock physics, wave phenomena, and signal analysis. These are necessary topics for a proper appreciation of the seismic method.
Data acquisition deals with seismic survey design and instrumentation, i.e. sources and receivers, for land and marine environments. Acquisition parameters and their impact on subsequent processing and interpretation will be discussed, as well as acquisition in terms of the spatial sampling of a surface wavefield, and in terms of illumination of subsurface targets.
New developments in acquisition – survey design as well as instrumentation – will also be discussed; e.g. long offset full azimuth field design and broadband seismic acquisition.
Data processing can be characterised as a sequence of processing steps that start with the field data and ends with an image in depth of the subsurface structure together with a velocity model and, ideally, amplitudes that can be used for further applications.
Each of these processing steps has a number of alternative implementations and for each implementation there is a choice of parameters.
During this course all processing steps will discussed together with their alternative implementations, parameter choices and strong and weak points.
Data interpretation uses the depth image and velocity information for structural interpretation. Amplitude information, provided this information is preserved during processing, can be used for the subsequent derivation of lithological information, i.e. rock physics attributes, as well as used as direct hydrocarbon indicators (DHIs). The procedures like AVO (= amplitude versus offset) and seismic inversion will be discussed. In addition other procedures to exploit the seismic data will be discussed: time-lapse seismic (or 4D seismic), the derivation of seismic attributes like dip and azimuth, coherence, curvature and spectral decomposition.
Developments like multi-component seismic, including OBC (ocean bottom cable) acquisition and processing together with their contribution to structural and lithological interpretation will be discussed. Anisotropy and fracture characterisation is naturally part of this discussion.
Training Course Content
At the end of this course the participants will have a working knowledge of the full range of processes of the seismic method: acquisition, processing, and interpretation.
He or she is fully capable to arrive at a proper assessment of the seismic input in multi-disciplinary teams.
Geophysicists – acquisition and processing – at the beginning of their career will have an excellent starting point for subsequent more advanced courses.
Mobility Oil and Gas
Based in London, Mobility Oil and Gas provides comprehensive services to the global oil and gas industry in the areas of Petroleum Engineering Consultancy and Training. We are accredited by the British Accreditation Council for Independent Further and Higher Education...
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