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When nets meet environmental DNA metabarcoding: integrative approach to unveil invertebrate community patterns of hypersaline lakes
Saline and hypersaline wetlands account for almost half of the volume of inland water globally. They provide pivotal habitat for a vast range of...
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Perforation location optimization through 1-D mechanical earth model for high-pressure deep formations
Optimum perforation location selection is an important study to improve well production and hence in the reservoir development process, especially...
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Shallow Gas Disasters
Shallow gas is generally referred to in the seabed below 1000 m of gas accumulation in the sediments. The components of shallow gas have simple...
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Prediction of Minimum Mud Weight for Prevention of Breakout Using New 3D Failure Criterion to Maintain Wellbore Stability
Oil and gas extraction is difficult without understanding the subsurface formation up to the desired depth. Wellbore instability, such as lost...
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Improving drilling hydraulics estimations-a case study
Accurate pressure drop estimation is important for drill string and bit nozzles design and optimized fluid circulations as well as identifying the...
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The variation of free gas distribution within the see** seafloor hydrate stability zone and its link to hydrate formations in the Qiongdongnan Basin
China geological survey has conducted two hydrate expeditions for two gas chimney structures (GC1, GC2) in the Qiongdongnan Basin, South China Sea,...
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Wellbore instability management using geomechanical modeling and wellbore stability analysis for Zubair shale formation in Southern Iraq
Wellbore instability problems cause nonproductive time, especially during drilling operations in the shale formations. These problems include stuck...
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Earth-shaking J. LEAGUE supporters
We conducted temporary seismic observations at the Hitachi-Kashiwa Soccer Stadium on a J. LEAGUE game day to obtain unique seismic records due to the...
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Gas Hydrate Disasters
Marine gas hydrate hazards pose a significant threat to submarine pipelines, drilling platforms, and the near-shore environment. These hazards are...
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Design Model and Software Development of Casing String Strength for Horizontal Wells in ChangQing Region
In recent years, there have been frequent occurrences of casing damage in tight oil and gas wells in the ChangQing region, the pressure bearing of...
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Petrogenesis of the Mesoarchaean Stella layered intrusion, South Africa: implications for the origin of PGE reefs in the upper portion of layered intrusions
The ~3033 Ma Stella layered intrusion is hosted by supracrustal rocks of the Kraaipan–Madibe greenstone terrane, South Africa. The studied portion of...
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A new technique for forecasting pore pressure in two oil wells in North Rumaila field based on specific energy concept
Forecasting the pore or formation pressure is crucially significant in every well drilling operation to determine whether the pore pressure gradient...
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The Application of Well Testing in Water Encroachment Discrimination of KL2 Water-Bearing Gas Reservoir
The High-pressure gas reservoirs and high-pressure gas condensate reservoirs make up 20% of the proved natural gas reserve and 72% of the proved oil...
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Pore pressure prediction using seismic velocity modeling: case study, Sefid-Zakhor gas field in Southern Iran
Pore pressure estimation is important for both exploration and drilling projects. During the exploration phase, a prediction of pore pressure can be...
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Machine learning algorithm for prediction of stuck pipe incidents using statistical data: case study in middle east oil fields
One of the most troublesome issues in the drilling industry is stuck drill pipes. Drilling activities will be costly and time-consuming due to stuck...
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Rigorous review of electrical submersible pump failure mechanisms and their mitigation measures
Artificial lift is a vital part of the life of many oil wells worldwide. Using several artificial lift methods can prolong the life of the wells and...
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Introduction
The deepwater area is rich in oil and gas resources (Weimer et al. 2006; Zhang et al. 2007; Wu et al. 2009; Wu et al. 2018). However, deepwater oil...
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Optimal Operational Scheduling of Pumps to Improve the Performance of Water Distribution Networks
Widely used software packages might still be deficient when it comes to optimal pump scheduling as they allow concurrent Variable Speed Pumps (VSPs)...
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Rapid Laurentide Ice Sheet growth preceding the Last Glacial Maximum due to summer snowfall
There has been extensive research into the nonlinear responses of the Earth system to astronomical forcing during the last glacial cycle. However,...
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Comparative study of homogeneous ensemble methods with conventional ML classifiers in litho-facies detection using real-time drilling data
The drilling operation is known to be influenced by the formation’s lithology. Real-time prediction of formation parameters is essential to steer the...
