Weather Events Have Reduced Our Forecast of U.S. Hydropower Generation by 6% This Year - 28 September, 2023 07:57 AM
Carbon Capture and Storage Projects in Denmark at Risk From Bitumen Formation - 28 September, 2023 07:48 AM
Effect of Iron on the Preservation of Organic Carbon in Marine Sediments and Its Implications for Carbon Sequestration - 28 September, 2023 07:41 AM
Oil Prices Steady as Russia Eases Fuel Export Ban - 25 September, 2023 07:30 AM
Harold Hamm Calls for Consistency In U.S. Oil and Gas Regulation - 25 September, 2023 07:30 AM
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The processing of land seismic data entails a series of steps through which the data passes, including sorting, static correction, deconvolution, residual static correction, velocity analysis, migration, stacking, filtering and scaling. Some tasks, such as velocity analysis, are interactive, while others are automated. The processing of seismic data from the same area often follows the same proven series of steps or sequence, barring any unforeseen issues that need to be addressed. Such a sequence of tasks designed to process data from their initiation to completion is referred to as a “workflow.”
Alaska’s North Slope is the best conventional onshore oil play in the world. That’s according to Bill Armstrong, CEO and president of Armstrong Oil and Gas, Inc. And, he will give no quarter on his belief about how robust the future is for the North Slope’s prospects. In short, Armstrong calls the area “incredible.”
In the early days of analogue recording, geophysicists used seismic data primarily to map structure. However, improvements in data quality by the late 1960s led to the identification of lateral changes in amplitude as well. When the drill bit revealed that some of the higher amplitude events correlated to gas-bearing zones, interpreters started taking them seriously. These streaks of high amplitudes seen on seismic sections were christened “bright spots.” The initial excitement was tempered by the realization that not all bright spots correspond to gas.
Being an AAPG Distinguished Lecturer, from the very first speaking tour in 1941, was always a prestigious achievement and a source of honor and pride for those selected as speakers. It was always recognized and praised as an important vehicle for the profession’s top geoscientists to share the latest in industry insights and advances. It always showcased geologists who truly were distinguished. What it wasn’t always, was easy.
To achieve net-zero carbon emissions by 2050, the demand for renewable energy is increasing exponentially, with offshore wind farms as one potential area of investment. Offshore wind farm development requires effective mapping of near subsurface for turbine foundation design and construction, which faces many challenges related to seafloor topography mapping, shallow geohazard detection, structure interpretation and modeling, soil type analysis and geotechnical property estimation, among other considerations.
On Jan. 9, Trinidad and Tobago’s Ministry of Energy and Energy Industries concluded the 2022 Onshore and Nearshore Competitive Bid Round. This bid round featured a total of 11 blocks covering more than 115,000 hectares. Blocks offered included Aripero, Buenos Ayres, Charuma, Cipero, Cory D, Cory F, Guayaguayare, South West Peninsula Onshore, St. Mary’s and Tulsa, located in the central to southern onshore Trinidad; and the South West Peninsula Offshore, located off the southern coast of Trinidad. Xavier Moonan, president-elect of AAPG’s Latin America and Caribbean Region and exploration manager of Touchstone Exploration Inc., follows the bid rounds closely.
The successful Mars InSight mission employed a NASA/European Space Agency robotic lander designed to study the interior of Mars. The mission recently ended with last contact as its dust-choked solar panels failed to deliver enough electricity to keep InSight going. InSight had two science goals: Seek to determine the interior structure and composition of Mars and to reveal how a rocky planet forms, and to study the rate of Martian tectonic activity and meteorite impacts.
Seismic impedance is widely used in our industry because it allows an integrated approach to geological interpretation. The transformation of seismic amplitudes to impedance data can be essentially seen as the change from an interface property to a layer property. This stratal interval property (impedance) simplifies the lithologic and stratigraphic identification and can be directly converted into lithologic or reservoir properties such as porosity, fluid fill and net pay. It also allows for direct interpretation of three-dimensional geobodies.
With the increasing size of the seismic data volumes, machine learning applications have been found to accelerate the discrimination of seismic facies used in the identification of geologic patterns, defining stratigraphy and the direct indication of hydrocarbons. Many practitioners have demonstrated the application of dimensionality reduction tools such as principal component analysis and independent component analysis, or clustering techniques. Some of these are available in several commercial interpretation software packages.
In the world of oil and gas, an increasing number of plays in stratigraphic traps are being made – in large part due to ever-evolving seismic technology. The Discovery Thinking forum at the annual IMAGE conference in August served to highlight some of these plays in offshore frontier basins and the role that geophysics played in their discovery. “We are seeing more giant stratigraphic fields, and seismic is the key,” said past AAPG President Charles A. Sternbach, chair of the Discovery Thinking forum. “And, we are seeing more oil found at greater depths. Unconventional plays are migrating outside of the Western Hemisphere.”
The entire Middle Pennsylvanian–to–top Precambrian basement (500 m) interval was cored in early 2011 in the BEREXCO Wellington KGS #1-32 well in Wellington Field, Sumner County, KS.
Gas hydrates, ice-like substances composed of water and gas molecules (methane, ethane, propane, etc.), occur in permafrost areas and in deep water marine environments.
This presentation is designed for exploration/production geologists and geological managers or reservoir engineers.
The presentation describes a well established fracture modeling workflow that uses a standard 3D seismic, conventional logs, image logs and data from one core to build predictive 3D fracture models that are validated with blind wells.
This presentation will focus on the seismic stratigraphic and seismic geomorphologic expression of deep-water deposits, including both reservoir and non-reservoir facies.
There are approximately 1,000 oil and gas fields in the world that have been classified as 'giant,' containing more than 500 million barrels of recoverable oil and /or 3 trillion cubic feet of gas.
This study will focus in the combination of λρ – μρ inversion with clustering analysis techniques in order to discriminate brittle zones in the Barnett Shale.
This e-symposium will provide information on which tools, processes, and procedures all geoscientists, engineers, and technical professionals working in shale plays need to understand and implement.
This course is ideal for individuals involved in Midland Basin exploration and development. Successful development of Wolfcamp shale oil relies on complex inter-relationships (ultimately interdependencies) within and between a wide variety of scientific disciplines, financial entities, and company partnerships.
Presented by Kevin C. Hill, Associate Professor, University of Melbourne
Gravity modelling of Australia's southern margin reveals that the initial rift with Antarctica was beneath the current Ceduna Delta. A regional, high-quality seismic traverse from the coast to oceanic crust across the Bight Basin has been assembled and interpreted in detail, then balanced, restored, decompacted, and replaced at paleo-water depths. The Late Cretaceous Ceduna Delta developed above a Late Jurassic-Early Cretaceous rift basin in three stages punctuated by significant pulses of uplift and erosion across areas >100 km wide and with up to 1 km of erosion. The Cenomanian White Pointer delta prograded into deepening water and hence underwent gravitational collapse. This was terminated in the Santonian when the Antarctic margin was pulled out from below, thus supplying heat to a remnant thicker outer margin crust, causing doming and erosion. Importantly, this established the saucer-shaped geometry of the Ceduna Delta that persisted throughout its development, so that any hydrocarbons generated in the southern half of the basin would have migrated towards this outer margin high. The Tiger Formation was deposited in shallow water in a full rift basin prior to breakup, which was followed by regional thermal subsidence. The Hammerhead delta developed on the newly formed passive margin but was terminated by another pulse of uplift and erosion, perhaps associated with a change in plate motion at the end of the Cretaceous. The finite element modelling of this proposed tectonic evolution will test its validity and predict hydrocarbon generation and migration through time.
Around 170 million years ago, the Gulf of Mexico basin flooded catastrophically, and the pre-existing landscape, which had been a very rugged, arid, semi-desert world, was drowned beneath an inland sea of salt water. The drowned landscape was then buried under kilometers of salt, perfectly preserving the older topography. Now, with high-quality 3D seismic data, the salt appears as a transparent layer, and the details of the drowned world can be seen in exquisite detail, providing a unique snapshot of the world on the eve of the flooding event. We can map out hills and valleys, and a system of river gullies and a large, meandering river system. These rivers in turn fed into a deep central lake, whose surface was about 750m below global sea level. This new knowledge also reveals how the Louann Salt was deposited. In contrast to published models, the salt was deposited in a deep water, hypersaline sea. We can estimate the rate of deposition, and it was very fast; we believe that the entire thickness of several kilometers of salt was laid down in a few tens of thousands of years, making it possibly the fastest sustained deposition seen so far in the geological record.
Request a visit from Frank Peel!
In comparison with the known boundary conditions that promote salt deformation and flow in sedimentary basins, the processes involved with the mobilization of clay-rich detrital sediments are far less well established. This talk will use seismic examples in different tectonic settings to document the variety of shale geometries that can be formed under brittle and ductile deformations.
Request a visit from Juan I. Soto!
Three-dimensional (3D) seismic-reflection surveys provide one of the most important data types for understanding subsurface depositional systems. Quantitative analysis is commonly restricted to geophysical interpretation of elastic properties of rocks in the subsurface.
Wide availability of 3D seismic-reflection data and integration provide opportunities for quantitative analysis of subsurface stratigraphic sequences. Here, we integrate traditional seismic-stratigraphic interpretation with quantitative geomorphologic analysis and numerical modeling to explore new insights into submarine-channel evolution.
Request a visit from Jacob Covault!
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