Results 351 to 360 of about 1,082,940 (421)
Some of the next articles are maybe not open access.
Scaling geology and smooth solutions to inverse problems
SEG Technical Program Expanded Abstracts 1990, 1990Geophysical inverse problems are often ill-posed and require regularization or smoothing to obtain a physically realistic solution. Methods which determine the amount of smoothing to incorporate into the inversion are generally subjective, either through the choice of mathematical technique or the interpreter’s prior beliefs.
J.P. Todoeschuck, Mark Pilkington
openaire +2 more sources
, 2015
Geophysical inversion methods are used as part of an interpretation process that seeks to differentiate geologic units. To improve the reliability of geologic differentiation based on recovered images from geophysical inversions, we have developed a ...
Jiajia Sun, Yaoguo Li
semanticscholar +1 more source
Geophysical inversion methods are used as part of an interpretation process that seeks to differentiate geologic units. To improve the reliability of geologic differentiation based on recovered images from geophysical inversions, we have developed a ...
Jiajia Sun, Yaoguo Li
semanticscholar +1 more source
Coupling strategies in multiparameter geophysical joint inversion
Geophysical Journal International, 2018A big potential lies in the quantitative integration of multiple geophysical measurements for what concerns more unique and robust inversion results, complementary sensitivity to geological features and enhanced resolution.
D. Colombo, D. Rovetta
semanticscholar +1 more source
An 'Inverse CCS Site' in NW Hungary – Geology and Modeling
Proceedings, 2012The research of natural analogues for future CCS projects is a dynamically growing sector of geoengineering. In our work this newly discovered aspect of a CO2 field is presented. In NW Hungary there is a field utilized for more than 60 years. Thus there is a large amount of data from hydrocarbon exploration, gas measurements, seismic sections, well ...
Marton Berta +4 more
openaire +2 more sources
Amplitude Inversion of Depth-imaged Seismic Data from Areas with Complex Geology [PDF]
Proceedings, 2013 Conventional amplitude inversion assumes that the input migrated image has preserved relative amplitude information and is free from the effects of illumination. Under this assumption, stretching a depth migrated image back to time and applying inversion based on 1D convolutional modeling can produce reasonable results. However, illumination effects in
Xiang Du, Robin Fletcher, S.H. Archer
openaire +1 more source
Geophysics, 2018
Amplitude variation with offset (AVO) inversion is a typical ill-posed inverse problem. To obtain a stable and unique solution, regularization techniques relying on mathematical models from prior information are commonly used in conventional AVO ...
B. She +5 more
semanticscholar +1 more source
Amplitude variation with offset (AVO) inversion is a typical ill-posed inverse problem. To obtain a stable and unique solution, regularization techniques relying on mathematical models from prior information are commonly used in conventional AVO ...
B. She +5 more
semanticscholar +1 more source
Multiparameter Data-Space Reflectivity Full Waveform Inversion in Complex Geology
Saint Petersburg 2020, 2020Summary A reliable numerical method to solve inverse dynamic problem for elastic waves equation is proposed. This method is based on nonlinear least-squares formulation which is widely known as Full Waveform Inversion (FWI). The key issue on this way is correct reconstruction of macrovelocity component of the model with input seismic data without time ...
V. Cheverda, K. Gadylshin
openaire +2 more sources
Inverse Problem Using Geology and Geophysics
Proceedings, 2013Subsurface modeling is a key tool to describe, understand and quantify geological processes. As the subsurface is inaccessible and its observation is limited by acquisition methods, 3D models of the subsurface are usually built from the interpretation of sparse data with limited resolution.
openaire +2 more sources
Geophysical inversion contributions to mineral exploration: lessons from the Footprints project
Canadian journal of earth sciences (Print), 2019Magnetic and gravity inversions are used to create 2D or 3D models of the magnetic susceptibility and density, respectively, using potential field data.
Marc A. Vallée +12 more
semanticscholar +1 more source
Geology-guided Quantification of Production-Forecast Uncertainty in Dynamic Model Inversion
SPE Annual Technical Conference and Exhibition, 2011Abstract The presence of a large number of geologic uncertainties and limited well data typically increase the challenges associated with hydrocarbon recovery forecasting. Although recent advances in geologic modeling enable the automation of the model generation process by means of next-generation geostatistical tools, the computation ...
Genbao Shi, Stan Cullick, Marko Maucec
openaire +2 more sources