Results 41 to 50 of about 5,297 (218)
Study on the influence of drilling fluid filtration on stability of coalbed wellbore
Meikuang Anquan, 2021 Coal rock has many porous characteristics, such as cleavage, pore and so on. Drilling fluid is easy to invade into coal bed rock, which is easy to cause wellbore instability.
ZHANG Yi, CHEN Dong, ZHANG Hui, LIU Mengmeng, LIU Fu, WEI Kai
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Modelling of a Gas Cap Gas Lift System [PDF]
, 2011 Imperial Users ...
Okenwa, Junior Chukwudi +1 more
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Unstable Drainage Dynamics During Multiphase Flow Across Capillary Heterogeneities
Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.Abstract We use novel, fast 4D Synchrotron X‐ray imaging with large field‐of‐view to reveal pore‐ and macro‐scale drainage dynamics during gas–brine flow through a layered sandstone rock sample. We show that a single centimeter‐scale layer, similar in pore size distribution to the surrounding rock but with reduced connectivity, temporarily inhibits ...
C. Harris +4 more
wiley +1 more source
Thermo-mechanical analysis of wellbore stability in ultra-deep formations
Journal of Rock Mechanics and Geotechnical EngineeringWellbore stability is crucial for ultra-deep wells operating under high temperature and high stress conditions. To analyze the effects of thermal shock and horizontal stress on wellbore stability, a series of true triaxial compression experiments and ...
Yang Yang +5 more
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Large‐Scale Hydrogen Storage: Surface and Subsurface Challenges
ChemBioEng Reviews, Volume 13, Issue 2, April 2026.This review examines underground hydrogen storage with emphasis on the interaction between surface facilities and subsurface reservoirs. Variable renewable hydrogen requires compression, buffering, and purification before injection, while subsurface processes influence wellhead pressure, temperature, and composition.
Mostafa Montazeri +3 more
wiley +1 more source
Deep Underground Science and Engineering, Volume 5, Issue 1, Page 144-159, March 2026.The present study uses the Modified Mohr‐Coulomb true‐triaxial failure criterion (MMC_TT), which predicts the strength of rock better than the MGC criterion in laboratory true‐triaxial tests to overcome the limitations. Moreover, based on the data from previously published five vertical wells in the Krishna‐Godavari basin (K‐G basin), an empirical ...
Ravindra K. Burnwal, Aditya Singh
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Deep Underground Science and Engineering, Volume 5, Issue 1, Page 277-295, March 2026.This study investigates the coupled thermo‐mechanical behavior of granite during heating and cooling through a combination of laboratory tests and finite element analysis. The thermal conductivity, mineral composition, mass loss rate, micro‐crack observation, and thermal fracture characteristics of granite under various temperature conditions are ...
Rui Pang +8 more
wiley +1 more source
Determination of Safe Mud Weight Window in Rumaila Oilfield, Southern Iraq
Iraqi Geological Journal, 2021 The oil and gas industry, wellbore instability plays an important role in financial losses and stops the operations while the drilling which leads to extra time known as non-productive time.
Walaa Khyrie, Ayad Alrazzaq
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Energy Science &Engineering, Volume 14, Issue 3, Page 1398-1415, March 2026.Cuttings transport simulation workflow. ABSTRACT Efficient cuttings transport is essential for wellbore stability and minimizing non‐productive time in deviated and horizontal wells. This study applies global sensitivity analysis (GSA) to evaluate the influence of 14 drilling parameters on cuttings transport using WellPlanTM hydraulic simulations ...
Esraa A. Refaie +3 more
wiley +1 more source
ENVIRONMENTAL SUSTAINABILITY OF OIL INDUSTRY [PDF]
, 2013 Similarly to most industrial activities, the oil industry can affect the environment at several stages. The greatest impact is the release of waste into the environment in concentrations that are not natural.
Rocca, Vera, Viberti, Dario
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