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Data-driven double-focusing resolution analyses for seismic imaging
Fu, Li-Yun (China University of Petroleum (East China), Laoshan Laboratory) | Tang, Cong (PetroChina Southwest Oil & Gas Field Company) | Wei, Wei (Chinese Academy of Sciences) | Du, Qizhen (China University of Petroleum (East China), Laoshan Laboratory)
Seismic imaging requires a supporting tool to measure its resolution characteristics as a basis for seismic interpretation. However, traditional focal-beam resolution analyses are usually applied to acquisition geometries by calculating the impulse response of a single point in a reference velocity model. Seismic data to directly estimate the spatial resolution of migrated images remains unaddressed. We address this data resolution by incorporating weighted focal beams into the prestack migration process to develop a data-driven double-focusing (DF) resolution analysis method for complex media. Unlike traditional resolution analyses that define the system resolution of acquisition geometries using a unit point reflector, the data-driven resolution analysis for seismic imaging uses angle-trace gathers that contain all the information of acquisition geometries, migration velocities, propagation effects, and reflectivities. The data-driven resolution analysis consists of the detector- and source-focusing processes using common-shot and common-detector gathers, respectively, followed by a multiplication of weighted focal detector and source beams. The resulting resolution function can be used to calculate the horizontal and vertical resolution and sharpness of a given imaging point. It is implemented along with prestack migration to share the same wavefield extrapolation without invoking extra computational cost. We benchmark the data-driven method for a homogeneous medium containing single-point and double-point targets by conventional point-spread and focal-beam methods. Numerical experiments with wedge-model synthetic data and field data show the performance of the DF resolution analysis, demonstrating the effects of propagation attenuation, incorrect migration velocity, and noise contamination, which significantly reduce the system resolution of acquisition geometries.
- Geophysics > Seismic Surveying > Seismic Processing > Seismic Migration (1.00)
- Geophysics > Seismic Surveying > Seismic Modeling (1.00)
- Asia > China > Sichuan > Sichuan Basin > Southwest Field > Longwangmiao Formation (0.99)
- North America > United States > Louisiana > China Field (0.97)
Pieridae Energy has reconfirmed its expectations to sell its abandoned Goldboro LNG project prior to the end of June 2024. Proceeds will be used to partially repay its 22 million convertible bridge term loan which matures on 13 December 2024. The Canadian independent said last November that it was walking away from the project, which it had been pursing since 2012. Once the sale is completed, it will mark the conclusion of Pieridae's pivot away from east coast LNG and toward an Alberta-focused natural gas production and processing business. "Our intent to divest our LNG business was previously communicated, and we advanced the planned sale of the Goldboro Nova Scotia LNG assets in the fourth quarter of 2023," company President and Chief Executive Darcy Reding told investors this month.
Numerous surface-felt earthquakes have been spatiotemporally correlated with hydraulic fracturing operations. Because large deformations occur close to hydraulic fractures (HFs), any associated fault reactivation and resulting seismicity must be evaluated within the length scale of the fracture stages and based on precise fault location relative to the simulated rock volumes. To evaluate changes in Coulomb failure stress (CFS) with injection, we conducted fully coupled poroelastic finite-element simulations using a pore-pressure cohesive zone model for the fracture and fault core in combination with a fault-fracture intersection model. The simulations quantify the dependence of CFS and fault reactivation potential on host-rock and fault properties, spacing between fault and HF, and fracturing sequence. We find that fracturing in an anisotropic in-situ stress state does not lead to fault tensile opening but rather dominant shear reactivation through a poroelastic stress disturbance over the fault core ahead of the compressed central stabilized zone. In our simulations, poroelastic stress changes significantly affect fault reactivation in all simulated scenarios of fracturing 50-200 m away from an optimally oriented normal fault. Asymmetric HF growth due to the stress-shadowing effect of adjacent HFs leads to 1.) a larger reactivated fault zone following simultaneous and sequential fracturing of multiple clusters compared to single-cluster fracturing; and 2.) larger unstable area (CFSgt;0.1) over the fault core or higher potential of fault slip following sequential fracturing compared to simultaneous fracturing. The fault reactivation area is further increased for a fault with lower conductivity and with a higher opening-mode fracture toughness of the overlying layer. To reduce the risk of fault reactivation by hydraulic fracturing under reservoir characteristics of the Barnett Shale, the Fort Worth Basin, it is recommended to 1.) conduct simultaneous fracturing instead of sequential; and 2.) to maintain a minimum distance of ~ 200 m for HF operations from known faults.
- North America > Canada (1.00)
- North America > United States > Texas > Travis County > Austin (0.28)
- North America > United States > Texas > Tarrant County > Fort Worth (0.24)
- Geology > Structural Geology > Tectonics > Plate Tectonics > Earthquake (1.00)
- Geology > Structural Geology > Fault (1.00)
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- (2 more...)
- South America > Argentina > Patagonia > Neuquรฉn > Neuquen Basin > Vaca Muerta Shale Formation (0.99)
- North America > United States > Wyoming > Green River Basin > Jonah Field (0.99)
- North America > United States > West Virginia > Appalachian Basin (0.99)
- (51 more...)
Adriana Citlali Ramรญrez is a Mexican citizen who has a PhD in Physics from the University of Houston's Mission-Oriented Seismic Research Program. During her graduate studies, Adriana had internships with Shell, Statoil (now Equinor), ConocoPhillips, and BP. After graduation, she worked in R&D at WesternGeco in the United States, and later at PGS in the UK. In 2012, Adriana joined Equinor's Research and Technology Exploration unit in Norway, where she led the R&D work related to broadband technology. She later moved to Geophysical Operations and focused on survey design and new technological developments.
- Europe > United Kingdom > North Sea > Central North Sea > Central Graben > Block 21/10 > Forties Field > Forties Formation (0.94)
- Europe > Norway > North Sea > Central North Sea > Central Graben > PL 018 > Block 2/4 > Greater Ekofisk Field > Ekofisk Field > Tor Formation (0.94)
- Europe > Norway > North Sea > Central North Sea > Central Graben > PL 018 > Block 2/4 > Greater Ekofisk Field > Ekofisk Field > Ekofisk Formation (0.94)
- North America > United States (0.89)
- Information Technology > Knowledge Management (0.76)
- Information Technology > Communications > Collaboration (0.76)
Department of Petroleum Engineering, University of Houston, 2. Metarock Laboratories, 3. Department of Earth and Atmospheric Sciences, University of Houston) 16:00-16:30 Break and Walk to Bizzell Museum 16:30-17:30 Tour: History of Science Collections, Bizzell Memorial Library, The University of Oklahoma 17:30-19:00 Networking Reception: Thurman J. White Forum Building
- North America > United States > Texas (0.51)
- North America > United States > Oklahoma (0.44)
- North America > United States > Colorado (0.31)
- Geology > Geological Subdiscipline > Geomechanics (0.76)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (0.49)
- North America > United States > Wyoming > Laramie Basin > Niobrara Formation (0.99)
- North America > United States > Wyoming > DJ (Denver-Julesburg) Basin (0.99)
- North America > United States > West Virginia > Appalachian Basin > Marcellus Shale Formation (0.99)
- (38 more...)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization (1.00)
- Reservoir Description and Dynamics > Formation Evaluation & Management (1.00)
- Reservoir Description and Dynamics > Reservoir Fluid Dynamics > Flow in porous media (0.48)
Petroleum Engineering, University of Houston, 2. Metarock Laboratories, 3. Department of Earth and Atmospheric Sciences, University of Houston) 16:00-16:30 Break and Walk to Bizzell Museum 16:30-17:30 Tour: History of Science Collections, Bizzell Memorial Library, The University of Oklahoma 17:30-19:00 Networking Reception: Thurman J. White Forum Building
- Research Report > New Finding (0.93)
- Overview (0.68)
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Geology > Mineral (0.72)
- Geology > Rock Type > Sedimentary Rock > Carbonate Rock (0.68)
- (2 more...)
- Geophysics > Borehole Geophysics (1.00)
- Geophysics > Seismic Surveying > Seismic Modeling > Velocity Modeling (0.93)
- North America > United States > Wyoming > Laramie Basin > Niobrara Formation (0.99)
- North America > United States > Wyoming > DJ (Denver-Julesburg) Basin (0.99)
- North America > United States > West Virginia > Appalachian Basin > Marcellus Shale Formation (0.99)
- (47 more...)
In recent years, with continuous improvements in ultra-deep oil and gas exploration theory and technology, domestic onshore ultra-deep oil and gas exploration has continued to make breakthroughs, providing an important replacement field for CNPC's upstream business development and large-scale increase of reserves and production. The proven oil and gas reserves in ultra-deep reservoirs in Tarim Basin account for more than 50% of the proven oil and gas in ultra-deep reservoirs in China, and Tarim has become the main field for onshore ultra-deep exploration in China. This is not only due to the innovation of ultra-deep oil and gas geological theory, but also due to the breakthrough of ultra-deep geophysical technology. Tarim ultra deep oil and gas exploration faces many challenges: accurate imaging of steeply ultra-deep structures in complex mountains; better recovery of weak signals; enhanced imaging resolution in the ultra-deep subsalt of large desert areas; ultra-deep imaging in thick loess covered areas and other problems restricts the process and economic development of ultra-deep oil and gas exploration in basin. Therefore, there is an urgent need to study theoretical technologies suitable for ultra-deep geophysical acquisition, weak signal processing and imaging, as well as ultra-deep reservoir prediction and fluid identification under different geological conditions.
- Energy > Oil & Gas > Upstream (1.00)
- Government > Regional Government > Asia Government > China Government (0.40)
- Asia > China > Xinjiang Uyghur Autonomous Region > Tarim Basin (0.99)
- North America > United States > Louisiana > China Field (0.95)
- North America > United States > California (1.00)
- Europe (1.00)
- Asia (1.00)
- (2 more...)
- Geology > Structural Geology > Tectonics > Plate Tectonics (1.00)
- Geology > Rock Type (1.00)
- Geology > Mineral (1.00)
- (3 more...)
- Geophysics > Gravity Surveying (1.00)
- Geophysics > Borehole Geophysics (1.00)
- Geophysics > Seismic Surveying > Passive Seismic Surveying (0.92)
- (2 more...)
- Materials > Metals & Mining (1.00)
- Materials > Chemicals (1.00)
- Government > Regional Government > North America Government > United States Government (1.00)
- (5 more...)
- North America > United States > Nevada > Dixie Valley Field (0.99)
- North America > United States > California > Mayacamas Mountains > Geysers Field (0.99)
- North America > Trinidad and Tobago > Trinidad > Southern Basin (0.99)
- (3 more...)
- Information Technology > Modeling & Simulation (0.92)
- Information Technology > Communications > Collaboration (0.40)
The Energy Information Administration (EIA) forecasts lower US dry natural gas production for the remainder of the year due in large part to continued lower natural gas prices. Several producers scaled back drilling activities after prices fell to a 3.5-year low in February. EIA expects production levels to remain steady in March from February at just under 104 Bcf/D, then slight declines for the balance of the year. "We do not expect that natural gas production will return to its December 2023 record of 106 Bcf/D during the forecast period," EIA wrote. Production increases to 104 Bcf/D in 2025, driven by expected growth in associated natural gas production in the Permian Basin and growth in LNG export demand."
- North America > United States > Texas (0.27)
- North America > United States > New Mexico (0.27)
- Government > Regional Government > North America Government > United States Government (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.99)
- North America > United States > Texas > Permian Basin > Yates Formation (0.99)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.99)
- (21 more...)
Kamal Malick has been working in the energy industry for more than 25 years in a variety of technical and leadership roles. He has worked globally in Canada, the USA, the North Sea, and Asia-Pacific regions on various complex oil and gas fields under both natural depletion and EOR schemes. Kamal is currently working for Calgary-based independent, Enerplus Corporation on the Williston Basin in North Dakota developing exploitation plans for the Bakken and Three Forks shale formations. He has also worked in various conventional, tight, and unconventional fields in West Central Alberta Canada. Previously, he was the Subsurface Manager for one of the largest onshore gas fields in Indonesia consisting of multiple naturally fractured stacked zones.
- North America > United States > North Dakota (1.00)
- North America > Canada > Alberta > Census Division No. 6 > Calgary Metropolitan Region > Calgary (0.30)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock > Shale (0.59)
- Geology > Geological Subdiscipline > Economic Geology > Petroleum Geology (0.52)
- Asia > Pakistan > Sindh > Indus Basin > Badin Block > Badin Field (0.97)
- North America > United States > South Dakota > Williston Basin > Bakken Shale Formation (0.94)
- North America > United States > North Dakota > Williston Basin > Three Forks Group Formation (0.94)
- (2 more...)