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United States
More than 1,000 mound structures have been mapped in shallow marine sediments at the Cretaceous Paleogene boundary in the Rub Al-Khali of Saudi Arabia. Mapping utilized 3D reflection seismic data in a 37,000 square kilometer study area. No wells penetrate the mounds themselves. The mounds are at a present-day subsurface depth of approximately 1 km and are convex-up with diameters of 200 400 m and elevation of 10 15 m. The mounds display spatial self-organization with a mean separation of approximately 3.75 km. Comparison with mound populations in other study areas with known spatial distribution statistics and modes of origin indicates that the mound population in this study has the characteristics of fluid escape structures, and they are interpreted here as mud volcanoes. The observation that the mounds occur at the Cretaceous Paleogene boundary demands a singular trigger at that moment in time. We develop a model of seismic energy related mud volcanism mechanism including the Chicxulub asteroid impact as the energy source that accounts for the timing of the mound structures, and a drainage cell model based on producing water wells that provides a mechanism for spatial self-organization into a regular pattern.
- Europe (1.00)
- Asia > Middle East > Saudi Arabia (1.00)
- Africa (1.00)
- Phanerozoic > Cenozoic > Paleogene > Paleocene (0.67)
- Phanerozoic > Mesozoic > Cretaceous > Upper Cretaceous (0.46)
- Geology > Sedimentary Geology > Depositional Environment > Marine Environment (1.00)
- Geology > Rock Type > Sedimentary Rock (1.00)
- Geology > Geological Subdiscipline > Volcanology (1.00)
- (2 more...)
- Geophysics > Seismic Surveying > Seismic Processing (1.00)
- Geophysics > Seismic Surveying > Seismic Interpretation > Well Tie (0.46)
- Oceania > New Zealand > South Island > South Pacific Ocean > Great South Basin (0.99)
- North America > Canada > Saskatchewan > Prairie Evaporite Basin (0.99)
- Europe > Norway > North Sea > Central North Sea > Norwegian-Danish Basin (0.99)
- (6 more...)
- Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (1.00)
- Data Science & Engineering Analytics > Information Management and Systems > Artificial intelligence (1.00)
DAS microseismic reflection imaging for hydraulic fracture and fault lineament characterization
Ma, Yuanyuan (Rice University) | Ajo-Franklin, Jonathan (Rice University, Lawrence Berkeley National Laboratory) | Nayak, Avinash (Lawrence Berkeley National Laboratory) | Correa, Julia (Lawrence Berkeley National Laboratory) | Kerr, Erich (SM Energy)
This study presents a novel workflow designed for migrating reflected S-waves generated by microseismic events, as recorded by downhole Distributed Acoustic Sensing (DAS), to characterize hydraulic fractures in three dimensions. In contrast to existing fracture imaging techniques, which have encountered challenges in accurately representing fracture networks and often rely on simplified models, the proposed imaging technique does not assume that fractures are planar or in a pre-specified orientation. DAS seismic measurements benefit from the large aperture and dense spatial sampling enabled by the kilometers-long fiber and, therefore are able to capture a large number of strong reflections compared to traditional borehole geophones or accelerometers. We treat microseismic events as high-frequency sources and apply prestack Kirchhoff migration to each individual source after wavefield separation. Fracture imaging results for multiple selected events are then stacked to generate a 3D reflectivity volume, revealing subsurface fracture and fault networks in intricate detail. The high-resolution fracture images generated by the developed reflection migrating process illuminate the heart of the stimulated volume of the reservoir, a zone that is often challenging to access using conventional surface arrays or active sources. To validate the effectiveness of the proposed workflow, our study employs a dataset acquired during a multi-well project in the Eagle Ford Shale and Austin Chalk in South Texas. To assess the accuracy and reliability of the results, the reflection imaging output is integrated with both microseismicity distribution and strain measurements from low-frequency DAS for interpretation. The results of reflection imaging improve our understanding of fracture geometry including distal fractures that are away from the monitoring well, allow direct estimation of fracture height and length, and potentially signify the presence of pre-existing fluid-filled fault lineaments.
- North America > United States > Texas > West Gulf Coast Tertiary Basin > Eagle Ford Shale Formation (0.89)
- North America > United States > Texas > West Gulf Coast Tertiary Basin > Austin Chalk Formation (0.89)
- North America > United States > Texas > Sabinas - Rio Grande Basin > Eagle Ford Shale Formation (0.89)
- (9 more...)
A new research project from the University of New Mexico (UNM) examined the conditions of the workforce in New Mexico's Permian Basin. Gabriel Sanchez, director of the school's Center for Social Policy, and Shannon Sanchez-Youngman, director of the school's Center for Participatory Research headed the Southeastern New Mexico Oil and Gas Workforce Study. "Our study had two main goals, to identify paths to improve the working conditions of oil and gas workers and to help inform areas in workforce training that should be addressed as the state transitions to clean energy production," Sanchez said. The study, commissioned by the nonprofit Somos Un Pueblo Unido, dove into the quality of life experienced by oil and gas workers in the state's Permian Basin--the majority of whom are Hispanic New Mexicans. This incorporated the past and present conditions and how the influence of clean energy could shift their career plans moving forward.
- 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...)
- 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...)
Terry Palisch is the vice president of technology and engineering at CARBO Ceramics in Richardson, Texas, and the 2024 SPE President. He began his career with ARCO in Alaska and Algeria, joining CARBO in 2004 where he currently leads the Research and Development team. Palisch has been an active SPE member for over 40 years, serving in various roles, including past chairman of the SPE Dallas Section, past chair of the SPE Annual Technical Conference and Exhibition (ATCE) technical program and former SPE Completions Technical Director. He is an SPE Distinguished Member and has received multiple SPE regional and international awards including Distinguished Service. He has coauthored more than 50 SPE technical papers and holds several patents.
- Asia (1.00)
- North America > United States > Texas > Dallas County > Richardson (0.25)
- Energy > Oil & Gas > Upstream (1.00)
- Government > Regional Government > Asia Government > Middle East Government (0.30)
Calculate the amount of lead time per kilometer of salt diameter as a function of depth assuming the sediments have the Louisiana Gulf Coast velocity distribution shown in Figure 11.1a. Early seismic prospecting for salt domes involved locating geophones in different directions from the source at roughly the same distance from it. Rays that passed through salt arrived earlier than those that did not, the reduction in traveltime due to the high velocity in salt being the lead time. The first two columns of Table 11.1a were obtained from the dashed curve in Figure 11.1a. The third column gives the lead time per kilometer of salt, that is, Δ t ( 1 / V i 1 / 4.6) {\displaystyle \Delta t (1/V_{i}-1/4.6)} The lead time decreases rapidly with depth to the top of the dome because compaction causes the sediment velocity to increase. Assuming a range of 5.6 km and normal sediment velocity at salt-dome depth of 2.7 km/s, how much salt would this indicate? Let x {\displaystyle x} be the path length in the salt. The lead time is the difference in traveltime for a salt path length of x {\displaystyle x} . The interpretation of refraction measurements necessarily involves a number of assumptions. How do these affect the interpretation? Refraction measurements are of apparent velocities (the inverses of the slopes) and intercept times observed from time-distance plots. Refraction events are generally defined by several points that approximately line up to define a straight line, which is drawn through the points. Refractor apparent velocity is then determined from the slope of the line and depth from the intercept with the time axis. If the refraction event from shooting in the opposite direction is also observed, the dip and refractor velocity can be determined. Events from shooting in opposite directions must be correlated correctly. Uncertainties in the data and correlations and differences between the real situation and the foregoing assumptions affect the interpretation. Where more than one head-wave event is present, the differences in slope must be large enough to distinguish them as separate events (see problem 11.3). Head waves where offsets are large often show shingling, an en-echelon pattern which may make traveltime picks a cycle late. In the following we assume that the apparent velocities and intercepts are all measured correctly. Assumption (1) of homogeneous constant-velocity overburden is usually not valid and the velocity in the horizontal direction often exceeds that in the vertical direction.
- North America > United States > Kentucky > Illinois Basin (0.99)
- North America > United States > Indiana > Illinois Basin (0.99)
- North America > United States > Illinois > Illinois Basin (0.99)
- Information Technology > Knowledge Management (0.76)
- Information Technology > Communications > Collaboration (0.76)
In this SPE Tech Talk, Coby Reynolds, Director of Water Treatment for TETRA Technologies, discusses how produced water is being managed by different E&Ps and midstream companies and how it will impact the market in coming years. Held on Tuesday, 17 May 2022 1030-1100 hours CT (UTC -5) Register below to watch the Tech Talk.
- North America > United States > Texas (0.40)
- North America > United States > New Mexico (0.40)
- 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...)
In this SPE Tech Talk, Coby Reynolds, Director of Water Treatment for TETRA Technologies, discusses how produced water is being managed by different E&Ps and midstream companies and how it will impact the market in coming years. Additionally, Reynolds will delve into strategic water usage, mobility, and treatment variability options as well as how seismicity has changed the recycling landscape.
- Energy > Oil & Gas (1.00)
- Water & Waste Management > Water Management (0.86)
- 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...)
The industry is now in its second year beyond the COVID-19 pandemic, and the workforce has changed in many ways, but issues facing production performance remain. Major conferences saw 116 submissions from 28 countries, with 64% regarding electrical submersible pumps (ESPs), and 18% and 8% devoted to gas lift and rod lift, respectively. Many of the papers dealt with case history successes. That is all well and good, but it doesn't necessarily drive reader interest if it can't be applied to their asset. The top three papers were selected on the guidelines of clarity of the abstract in addressing the scope, methods/procedures/process, results/observations/conclusions, and novel or additive information.
- 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...)
Intervention-based fiber optics have proved a valuable and cost-effective tool in understanding during-fracturing and post-flowback well and section performance. During-fracturing diagnostics, such as crosswell strain measurements from an offset monitor well, describe where fractures intersect the monitor well and reveal details such as azimuth, fracture-propagation velocity, and activation and reactivation statistics. These critical data points help inform cluster, stage, and well-spacing decision-making.
- North America > United States > Texas (0.47)
- North America > United States > New Mexico (0.47)
- North America > United States > Texas > Permian Basin > Yeso Formation (0.97)
- North America > United States > Texas > Permian Basin > Yates Formation (0.97)
- North America > United States > Texas > Permian Basin > Wolfcamp Formation (0.97)
- (21 more...)