... 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...

... Abstract In carbon capture and storage projects, and in unconventional plays, microseismic monitoring and optical fiber are critical components of the measure, monitor, and verify value chain. A velocity model is required to estimate source location (hypocenter), source parameters, and source...

... on the accuracy of the underlying formation 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...

... 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...

... and geological information shall be combined to calibrate the fracturing model for future fracturing campaigns in Upper Baharyia formation. fracture length field development fracture geometry upstream oil & gas reservoir characterization azimuth offshore technology conference velocity model...

... inversion (FWI), up 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...

... 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 image in the complex salt province. A real case...

... from the character of the seismic data alone. This was successfully accomplished by a combination of the velocity studies with the assistance of borehole data for ground truthing. The second was to produce an accurate velocity model of a shallow channel feature which was producing a push down effect...

... 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...

... intelligence salt body pore pressure pore-pressure prediction effective stress application general velocity model mechanism real time system upstream oil & gas subsalt sediment offshore technology conference overpressure salt province normal-compaction trend reservoir characterization...

... 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...

... 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...

... 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...

... – 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...

... 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...

... that mitigates these risks, identification of such hazards must extend from the mudline to TD. investment drilling hazard reservoir characterization pressure prediction upstream oil & gas velocity model salt canopy salt body imaging acquisition low fracture pressure fracture pressure...

... meeting thunder horse migration algorithm offshore technology conference matt trout geometry john howie dataset subsalt imaging reservoir characterization velocity model acquisition implementation OTC 20414 Two Assets, Two Approaches to Tackling Subsalt Imaging Thunder Horse...

... 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...

... or basalt. In addition, because of its ability to image reflection events that cannot be properly imaged by other imaging techniques (e.g., prism waves), RTM can 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...

..., 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. Everyone struggles to derive a model that represents the geology and fits the assumptions of the chosen imaging...