Estimating elastic properties of sediments by pseudo-wells generation utilizing simulated annealing optimization method
The hydrate concentration model considerably affects elastic properties, including bulk and shear modulus. Defining seismic properties of sediments, such as compressional and shear wave velocity and density, provides valuable information to identify rock facies and fluid types. This information comm...
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Elsevier
2024-12-01
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| Series: | Results in Earth Sciences |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211714824000116 |
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| author | Nasser Keshavarz Faraj Khah Bahare Salehi Pooria Kianoush Shahab Varkouhi |
| author_facet | Nasser Keshavarz Faraj Khah Bahare Salehi Pooria Kianoush Shahab Varkouhi |
| author_sort | Nasser Keshavarz Faraj Khah |
| collection | DOAJ |
| description | The hydrate concentration model considerably affects elastic properties, including bulk and shear modulus. Defining seismic properties of sediments, such as compressional and shear wave velocity and density, provides valuable information to identify rock facies and fluid types. This information commonly results from pre-stack seismic inversion, while post-stack seismic information provides acoustic impedance as a layer-based property. Traditionally, seismic inversion requires well logs to produce an initial guess of inversion routines and provide a low-frequency part of the amplitude spectrum. Eventually, seismic inversion methods could not be performed in the areas without well-log data, such as deep sea areas. In such cases, pseudo-well logs derived from pre-stack seismic data are a solution. Pseudo-well generation is a title used to estimate the elastic parameters of sediments in areas, such as deep marine environments, where drilled wells are absent or sparse. Metaheuristic optimization algorithms are suitable tools for minimizing the cost function as they best match real and synthetic seismic data. In this study, the SEAM earth model has been used as a reference to investigate the quality of pseudo-well generation utilizing a simulated annealing (SA) algorithm as an optimization method of property model change, which minimizes the cost function of seismic inversion. As a result, considering an initial model type of the SEAM model, simultaneous seismic inversion introduced the best compressional and shear wave velocities and density logs, which provide the best real and synthetic seismic data match when synthetic data is calculated from the simplified Zoeppritz equation. |
| format | Article |
| id | doaj-art-aa8cbb3f710e44449a4b1d54a2f53a76 |
| institution | Kabale University |
| issn | 2211-7148 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
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| series | Results in Earth Sciences |
| spelling | doaj-art-aa8cbb3f710e44449a4b1d54a2f53a762024-12-19T10:53:52ZengElsevierResults in Earth Sciences2211-71482024-12-012100024Estimating elastic properties of sediments by pseudo-wells generation utilizing simulated annealing optimization methodNasser Keshavarz Faraj Khah0Bahare Salehi1Pooria Kianoush2Shahab Varkouhi3Geoscience Faculty, Research Institute of Petroleum Industry (RIPI), Tehran, Iran; Correspondence to: Research Institute of Petroleum Industry, West Blvd., Near Azadi Sports Complex, Postal code: 1485733111, Tehran, Islamic Republic of IranGeoscience Faculty, Research Institute of Petroleum Industry (RIPI), Tehran, Iran; Brussels Polytechnic School, Université Libre de Bruxelles (ULB), Brussels, BelgiumDepartment of Petroleum and Mining Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran; National Iranian Oil Company, Exploration Directorate (NIOC-EXP), Tehran, IranDepartment of Earth Sciences, University College London, London WC1E 6BT, UKThe hydrate concentration model considerably affects elastic properties, including bulk and shear modulus. Defining seismic properties of sediments, such as compressional and shear wave velocity and density, provides valuable information to identify rock facies and fluid types. This information commonly results from pre-stack seismic inversion, while post-stack seismic information provides acoustic impedance as a layer-based property. Traditionally, seismic inversion requires well logs to produce an initial guess of inversion routines and provide a low-frequency part of the amplitude spectrum. Eventually, seismic inversion methods could not be performed in the areas without well-log data, such as deep sea areas. In such cases, pseudo-well logs derived from pre-stack seismic data are a solution. Pseudo-well generation is a title used to estimate the elastic parameters of sediments in areas, such as deep marine environments, where drilled wells are absent or sparse. Metaheuristic optimization algorithms are suitable tools for minimizing the cost function as they best match real and synthetic seismic data. In this study, the SEAM earth model has been used as a reference to investigate the quality of pseudo-well generation utilizing a simulated annealing (SA) algorithm as an optimization method of property model change, which minimizes the cost function of seismic inversion. As a result, considering an initial model type of the SEAM model, simultaneous seismic inversion introduced the best compressional and shear wave velocities and density logs, which provide the best real and synthetic seismic data match when synthetic data is calculated from the simplified Zoeppritz equation.http://www.sciencedirect.com/science/article/pii/S2211714824000116Pseudo wellsSeismic inversionSimulated annealing algorithmMetaheuristic algorithmsSeismic propertiesSEAM model |
| spellingShingle | Nasser Keshavarz Faraj Khah Bahare Salehi Pooria Kianoush Shahab Varkouhi Estimating elastic properties of sediments by pseudo-wells generation utilizing simulated annealing optimization method Results in Earth Sciences Pseudo wells Seismic inversion Simulated annealing algorithm Metaheuristic algorithms Seismic properties SEAM model |
| title | Estimating elastic properties of sediments by pseudo-wells generation utilizing simulated annealing optimization method |
| title_full | Estimating elastic properties of sediments by pseudo-wells generation utilizing simulated annealing optimization method |
| title_fullStr | Estimating elastic properties of sediments by pseudo-wells generation utilizing simulated annealing optimization method |
| title_full_unstemmed | Estimating elastic properties of sediments by pseudo-wells generation utilizing simulated annealing optimization method |
| title_short | Estimating elastic properties of sediments by pseudo-wells generation utilizing simulated annealing optimization method |
| title_sort | estimating elastic properties of sediments by pseudo wells generation utilizing simulated annealing optimization method |
| topic | Pseudo wells Seismic inversion Simulated annealing algorithm Metaheuristic algorithms Seismic properties SEAM model |
| url | http://www.sciencedirect.com/science/article/pii/S2211714824000116 |
| work_keys_str_mv | AT nasserkeshavarzfarajkhah estimatingelasticpropertiesofsedimentsbypseudowellsgenerationutilizingsimulatedannealingoptimizationmethod AT baharesalehi estimatingelasticpropertiesofsedimentsbypseudowellsgenerationutilizingsimulatedannealingoptimizationmethod AT pooriakianoush estimatingelasticpropertiesofsedimentsbypseudowellsgenerationutilizingsimulatedannealingoptimizationmethod AT shahabvarkouhi estimatingelasticpropertiesofsedimentsbypseudowellsgenerationutilizingsimulatedannealingoptimizationmethod |