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Keywords: velocity model
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2023
Paper Number: OTC-32393-MS
... Abstract Enhanced seismic velocity models (e.g. semblance or tomography) are key inputs for greenfield pore pressure prediction (PPP) in clastic basins, enabling velocity extraction along the planned well-path and also from a 3d earth-model surrounding the drill-site to test sensitivities...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-32049-MS
... velocity prediction. However, the accuracy of the velocity field created by conventional velocity modeling struggles to meet the requirements for accurate pore pressure prediction. To solve this problem, a new velocity modeling method is proposed that in depth domain is based on grid tomographic inversion...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2020
Paper Number: OTC-30660-MS
... incident or lost time. The data recovery was excellent. Data was processed with technologies including Full Waveform Inversion (FWI) for velocity model building and Least Squares Reverse-Time Migration (LSRTM). Dual coil and WAz data were used along with OBN to produce a superior image of the field...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-27164-MS
... to 18 Hz, enabled us to derive a detailed velocity model of the MTC, thereby improving the seismic image beneath it. Detailed analysis at a deeper reservoir level showed that event continuity, gather flatness, AVO response and pre-stack P-impedance inversion were all improved after migration using...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2016
Paper Number: OTC-26864-MS
... requires an accurate formation velocity model that typically are built using sonic logs, a low-noise environment, highly sensitive geophones, knowledge of the exact location, and orientation of the receivers. The two most common outputs of microseismic monitoring are the location of events...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-26004-MS
... of hydrocarbon targets in shallow water. Our workflow is dependent on an integrated velocity model building toolkit, which works well for salt geometry and sediment velocity model building. The workflow addresses the challenges associated with complex salt structures and produces an improved subsurface seismic...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25241-MS
... acquisition frequency spectrum receiver ghost streamer data migration offshore technology conference inversion resolution fwi velocity model upstream oil & gas velocity model Carlson , D.A. , Long , W. , Tobti ., H. , Tenghamn , R. , and Lunde , N. [ 2007...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25096-MS
... dataset upstream oil & gas velocity analysis migration application reservoir characterization interpretation velocity field offshore technology conference resolution detailed velocity field study depth migration velocity model reflector high resolution seismic pre-stack time...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24141-MS
... Abstract Full Waveform Inversion (FWI) has become a new tool in recent practice for subsurface velocity model updating. When using FWI, the common scheme was to use data sets which have relatively large offsets up to 8 km or more and frequencies as low as 2.8 Hz considering surface seismic...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24149-MS
... associated with propagation of the energy through the subsurface. Additionally the attenuation corrections introduce phase shifts into the data that can create biases in the velocity model if they are not rigoroulsy handled in the model building process. Ideally the incorporation of attenuation is handled...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24159-MS
... is presented in Table 1, and the methods are more fully described in Appendix A. Table 1: Summary of Pore-Pressure Prediction Models Conventional Modified Eaton Unconventional Eaton Resistivity Model Modified Eaton Velocity Model #1 (used the velocity compaction trend as proposed by Eberhart-Phillips (1989...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-24132-MS
... otc 24132 reservoir characterization algorithm seg technical program structural model offshore technology conference block 32 subsurface salt interpretation imaging migration exploration migration algorithm kaombo upstream oil & gas acquisition interpretation velocity model...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2011
Paper Number: OTC-21937-MS
... – Reservoir monitoring requiring time-lapse signal To address these challenges, respectively, a variety of seismic processing techniques like anisotropic velocity model building + PreStackDepthMigration (PreSDM), High Definition Seismic imaging, and 4D TimeLapse processing are commonly applied in our...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2010
Paper Number: OTC-20935-MS
... improvements in the quality of subsalt images, however there are challenging areas where the imaging is still quite poor and needs further advances in technology. Progress has also been made in building better velocity models with azimuthal tomography, introduction of TTI anisotropy combined with other...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2010
Paper Number: OTC-20854-MS
... investment drilling hazard reservoir characterization pressure prediction upstream oil & gas velocity model salt canopy salt body imaging acquisition low fracture pressure fracture pressure offshore technology conference mud weight otc 20854 prediction simulation drilling...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2010
Paper Number: OTC-20899-MS
... anomaly nova scotia transition velocity model continental margin canada ob line upstream oil & gas otc 20899 reconstruction reservoir characterization refraction line interpretation offshore technology conference continental crust crustal structure oetr association rp energy OTC...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2009
Paper Number: OTC-19875-MS
... be used for refining a velocity model. Thus, RTM is a tool of choice when exploring targets below salt canopies or other complexly shaped salt bodies. Despite considerable advances in computer technology, however, the cost of running RTM is still very high. The amount of computation far exceeds...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2009
Paper Number: OTC-19897-MS
... with alternative algorithms, for example Gaussian beam, wavefield extrapolation, and reverse-time approaches. As well, acquisition methods improved, providing enhanced azimuthal sampling for marine steamer surveys and further challenges for the imaging algorithms, All depth imaging depends on the velocity model...

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