Results 321 to 330 of about 1,053,111 (395)

Geological Structure-Guided Initial Model Building for Prestack AVO/AVA Inversion

IEEE Transactions on Geoscience and Remote Sensing, 2021
Reconstructing an accurate and high-resolution subsurface model is attractive in the fields of both geology and seismology. However, due to the band-limited characteristics of seismic data, the inversion greatly depends on the reliability of the initial ...
Guangtan Huang, Xiaohong Chen, C. Luo, Yangkang Zhang   +3 more
semanticscholar   +1 more source

Joint Impedance and Facies Inversion of Time-lapse Seismic Data for Improving Monitoring of CO2 Incidentally Stored From CO2 EOR

Social Science Research Network, 2021
Time-lapse seismic monitoring is an effective and proven technology for determining the distribution of CO2 in a subsurface reservoir. When injected CO2 displaces other reservoir fluids, the seismic impedance changes, causing time-lapse seismic amplitude
C. Barajas-Olalde, A. Mur, D. Adams, Lu Jin, Jun He, John A. Hamling, Charles D. Gorecki   +6 more
semanticscholar   +1 more source

Gravity data inversion for the basement relief delineation through global optimization: a case study from the Aegean Graben System, western Anatolia, Turkey

, 2020
Aegean Graben System is a significant member of the complex geology of western Turkey. The depths to the metamorphic basement reliefs in two major grabens have been reported by many geophysical studies. However, the sediment thicknesses of these graben
Y. L. Ekinci, Ç. Balkaya, Gökhan Göktürkler, Ş. Özyalın   +3 more
semanticscholar   +1 more source

Three‐Dimensional Mapping of Mt. Ruapehu Volcano, New Zealand, From Aeromagnetic Data Inversion and Hyperspectral Imaging

Journal of Geophysical Research: Solid Earth, 2020
Combining 3‐D inversion of high‐resolution aeromagnetic data with airborne hyperspectral imaging creates a new method to map buried structure and hydrothermal alteration, applied to Mt. Ruapehu volcano, New Zealand.
Craig A. Miller, L. Schaefer, G. Kereszturi, Dominique Fournier   +3 more
semanticscholar   +1 more source

Scaling geology and smooth solutions to inverse problems

SEG Technical Program Expanded Abstracts 1990, 1990
Geophysical 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.
M. Pilkington, J. P. Todoeschuck
openaire   +1 more source

Multiparameter Data-Space Reflectivity Full Waveform Inversion in Complex Geology

Saint Petersburg 2020, 2020
Summary 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 ...
K. Gadylshin, V. Cheverda
openaire   +1 more source

Improved Prediction of Thin Reservoirs in Complex Structural Regions Using Post-stack Seismic Waveform Inversion: A Case Study in the Junggar Basin

Canadian geotechnical journal (Print)
The Mahu sag slope area, which holds significance as an oil and gas resource, still have some underexplored regions because of structural mismatches, presenting a potential challenge to be properly addressed.
M. Ali, Peimin Zhu, Ren Jiang, Huolin Ma, U. Ashraf   +4 more
semanticscholar   +1 more source

Coupling strategies in multiparameter geophysical joint inversion

Geophysical Journal International, 2018
A 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

Inverse Problem Using Geology and Geophysics

Proceedings, 2013
Subsurface 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   +1 more source

A data-driven amplitude variation with offset inversion method via learned dictionaries and sparse representation

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, Yaojun Wang, Jiandong Liang, Zhining Liu, Chengyun Song, Guangmin Hu   +5 more
semanticscholar   +1 more source