Results 71 to 80 of about 2,284,708 (212)

A fluid-solid coupling model of wellbore stability for hydrate bearing sediments [PDF]

, 2011
Wellbore stability decides the success or failure and the cost of oil or gas drilling. It is more complicated for gas hydrate bearing sediments (HBS) because of the special properties of gas hydrates.
Zhang, Yuting, Yuting Zhang, Cui, Qing, Li, Lingdong, Qing Cui, Yuanfang Cheng, Lingdong Li, Zhao, Fengkun, Cheng, Yuanfang, Fengkun Zhao   +9 more
core   +1 more source

Buoyancy‐Driven Flow at Reservoir Conditions

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract Quantifying the transition between viscous‐ and buoyancy‐dominated flow during CO2 ${\text{CO}}_{2}$ injection is essential for predicting plume migration and evaluating storage efficiency in saline aquifers. While previous studies have examined the interaction of viscous, gravitational, and capillary forces, the precise definition of buoyancy‐
Almostafa Alhadi, Carlos Torres‐Verdín, David DiCarlo   +2 more
wiley   +1 more source

Transient Coupling of Swab/Surge Pressure and In-Situ Stress for Wellbore-Stability Evaluation During Tripping

, 2018
Summary This paper identifies wellbore-stability concerns caused by transient swab/surge pressures during deepwater-drilling tripping and reaming operations.
Mengjiao Yu, Zahra Zamanipour, Zhaoyang Wang, Feifei Zhang, Stefan Miska, Yongfeng Kang   +5 more
core   +1 more source

A Novel Modified Petroresin Particle (MPRP) With Enhanced Oil–Water Selectivity for Cold Production in Heavy Oil Reservoirs

Advanced Functional Materials, Volume 36, Issue 75, 17 September 2026.
A novel oil–water selective conformance control agent, MPRP, is prepared via hydrophilic grafting and mechanical granulation. MPRP uniformly disperses in water, cohesively expands upon aging, and readily dissolves in the oil phase. During conformance control, it selectively aggregates in water channeling pathways to form effective plugs without ...
Guang Zhao, Dongfang Lv, Chang Liu, Changxu Wu, Yifei Liu, Caili Dai, Huazhou Li   +6 more
wiley   +1 more source

Surface hydration‐induced damage in tight oil‐bearing sandy conglomerate reservoirs

Deep Underground Science and Engineering, Volume 5, Issue 3, Page 809-828, September 2026.
A series of techniques such as X‐ray diffraction, scanning electron microscopy, energy‐dispersive spectroscopy, conductivity tests, and infrared thermal imaging were used. The key findings are the identification of a two‐stage surface hydration process and the elucidation of the effects of various minerals and elements on the hydration process ...
Anbang Zhao, Shuheng Du, Yuan Zhang, Jinghong Hu, Bo Zhou, Yun Wei   +5 more
wiley   +1 more source

Borehole stability in naturally fractured rocks with drilling mud intrusion and associated fracture strength weakening: A coupled DFN-DEM approach

Journal of Rock Mechanics and Geotechnical Engineering
Borehole instability in naturally fractured rocks poses significant challenges to drilling. Drilling mud invades the surrounding formations through natural fractures under the difference between the wellbore pressure (Pw) and pore pressure (Pp) during ...
Yaoran Wei, Yongcun Feng, Zhenlai Tan, Tianyu Yang, Xiaorong Li, Zhiyue Dai, Jingen Deng   +6 more
doaj   +1 more source

Characterization of Shale-Drilling Fluid Interaction Mechanisms Related to Wellbore Instability

Journal of King Saud University: Engineering Sciences, 1996
Wellbore stability problems tend to occur during the drilling phase in shale sections, hence the understanding of shale-drilling fluid interaction mechanisms is essential if wellbore instability is to be avoided when drilling through shale sections.
Musaed N.J. Al-Awad, B.G.D. Smart
doaj   +1 more source

Automated Approach to Wellbore Stability Analysis, An

, 2016
In some formations exploratory drilling can be considered high risk. In these situations, in order to determine the probability of developing a useful production well, it can be possible to generate wellbore stability models without drilling. Our project
Carson Pollat (10086256), Hugh Hannum (10086250), Quentyn Guglielmo (10086247), Bronson Ogden (10086253)   +3 more
core   +1 more source

Thermo-poroelastic analysis of drilling fluid pressure and temperature on wellbore stresses in the Mansouri oilfield, SW Iran

Results in Earth Sciences
Ensuring wellbore stability is essential for successful oilfield drilling operations, as instability can prolong drilling time and escalate costs, potentially resulting in halted operations and loss of wells.
Alireza Pirhadi, Pooria Kianoush, Shahab Varkouhi, Reza Shirinabadi, Adel Shirazy, Aref Shirazi, Arash Ebrahimabadi   +6 more
doaj   +1 more source

IMPACT OF ROCK ANISOTROPY ON WELLBORE STABILITY ANALYSIS

, 2021
Wellbore stability is one of the major issues encountered during drilling operation since during drilling operation, in-situ stresses are being redistributed and the redistribution of stresses may not happen equally where the stresses may concentrate ...
MAT AKHIR, SITI HAJAR
core