Results 61 to 70 of about 504,172 (167)

Systematic Approach for Carbonate and Volcanic Facies Classification Based on Textural and Structural Variations Observed in Brazilian Pre‐Salt Acoustic Image Logs

Journal of Petroleum Geology, Volume 49, Issue 3, Page 869-906, July 2026.
ABSTRACT Facies characterization in carbonate reservoirs remains challenging due to their pronounced textural and structural heterogeneity. Variations in grain packing, cementation, and diagenetic overprints produce contrasting acoustic responses in borehole image logs, often limiting the reproducibility of facies interpretation.
Lenita de Souza Fioriti, Rodrigo César Teixeira de Gouvêa, Cleyton de Carvalho Carneiro   +2 more
wiley   +1 more source

Applying the Bow Tie Method to Evaluate Emerging Risk: The Case of Carbon Capture and Water Stress

Risk Analysis, Volume 46, Issue 7, July 2026.
ABSTRACT Emerging environmental risks are often shaped not by a lack of knowledge alone, but by fragmented information across systems, disciplines, and levels of governance. This fragmentation limits the ability of local decision‐makers to identify and respond effectively to rapidly developing technologies.
Matt J. Weisner, Vincent P. Paglioni, Ryan P. Scott   +2 more
wiley   +1 more source

Enhanced Rheological and Filtration Performance of Drilling Fluids Using Fe3O4/Saponin/Cu(II) Nanocomposites: Synthesis, Characterization, and Application

Asia-Pacific Journal of Chemical Engineering, Volume 21, Issue 3, May/June 2026.
ABSTRACT Drilling fluids used in high‐performance well operations often struggle to maintain rheological stability, colloidal dispersion, and filtration control under harsh downhole conditions. This study engineered a multifunctional Fe3O4@Saponin/Cu(II) nanocomposite to address these challenges.
Kassem Al Attabi, Farag M. A. Altalbawy, Hana Ihsan Hassan, Ahmed Salih Sahib, Zahraa Saad Abdulali, Mariem Alwan, Mahmood Jawad, Hiba Mushtaq, Aseel Smerat, Fatimah Pashtun   +9 more
wiley   +1 more source

CONTRIBUTION TO THE METHODOLOGY OF DETERMINING THE OPTIMUM MUD DENSITY - A CASE STUDY FROM THE OFFSHORE GAS CONDENSATE FIELD D IN THE PERSIAN GULF

Rudarsko-geološko-naftni Zbornik, 2018
Drilling the wells using water based mud through shale formations, causes their exposure to serious time-dependent wellbore instability due to shale swelling.
Damir Zadravec, Zdenko Krištafor
doaj   +1 more source

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, S. Krevor, A. H. Muggeridge, M. Camilleri, S. J. Jackson   +4 more
wiley   +1 more source

Study of borehole stability of volcanic rock formation with the influence of multiple factors

Journal of Petroleum Exploration and Production Technology
Borehole instability in igneous rock formation has attracted more and more attention in recent ten years. In order to understand the mechanism of wellbore instability in igneous formation, a borehole stability model is established by applying the thermal,
Mingming Zhang, Jinglin Wen, Zhiming Xu, Zhiwei Xu, Jiang Feng, Xingdong Zhao   +5 more
doaj   +1 more source

Modeling and Analysis of Drilling Disturbance to Unconsolidated Natural Gas Hydrate Reservoirs

Shiyou jixie, 2023
China's sea area contains tremendous reserves of natural gas hydrates.However,such hydrate reservoirs with shallow burial and low strength are often unconsolidated,and drilling-induced disturbance may cause wellbore collapse and impact both the ...
Li Qingchao, Zhang Shikuo, Yang Yang, Li Fawang, Liu Yang, Jian Zhaoqi   +5 more
doaj  

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, Alireza Salmachi, Manouchehr Haghighi, Tara Hosseini   +3 more
wiley   +1 more source

An integrated study of drilling fluid shaly rock interactions - A key to solve wellbore instability problems

, 1998
Drilling fluids/shaly rock interactions are known to be the main cause of wellbore instability problems leading to stuck pipe, extended drilling time and even sometimes abandonment of the well and, hence, great economic losses.
Kuru, E, Gagatay, B, Akin, S, Kerem, M, Demiral, B   +4 more
core   +1 more source

Evidences of Poor Hole-cleaning or of Wellbore Instability through Hook load Response [PDF]

, 2016
Poor hole-cleaning and wellbore instability are well-known problems during drilling operation. If they are not diagnosed in their early stage of development, they result in non-productive time (NPT). In order to reduce NPT, potential problems due to poor
Mkuyi, Fred Robert
core   +1 more source