Results 11 to 20 of about 509 (156)

Equivalent Refractive Index Modeling and Multidomain Characterization of the Temperature Response of Loss in Fiber-Optic Macro-Bends [PDF]

Sensors
In the oil and gas industry, fiber-optic telemetry is hindered by transmission degradation from high-temperature macro-bend loss. In this study, to address the lack of a unified model, we develop a numerical framework incorporating both bending-dominated
Haihui Shen, Dong Yang, Hu Han, Jianli Liu   +3 more
doaj   +2 more sources

Solid Tranilast Nanocrystal-Loaded Cationic Contact Lenses for Sustained Ocular Drug Delivery [PDF]

Pharmaceutics
Background/Objectives Conventional eye drops are the primary therapeutic option for ocular diseases; however, their clinical utility is hindered by several drawbacks, including limited bioavailability and suboptimal patient compliance.
Shinichiro Kobayakawa, Toru Matsunaga, Hiroko Otake, Shiori Hino, Fumihiko Ogata, Manju Misra, Kazutaka Kanai, Naohito Kawasaki, Noriaki Nagai   +8 more
doaj   +2 more sources

Microwave-Assisted Synthesis of Carbon Nanospheres and Their Application as Plugging Agents for Oil-Based Drilling Fluids [PDF]

Molecules
Wellbore instability caused by the invasion of drilling fluids into formations remains a significant challenge in the application of oil-based drilling fluids (ODFs).
Kaihe Lv, Haokun Shen, Yuan Geng, Mei-Chun Li, Hongyan Du, Xianbin Huang, Jinsheng Sun   +6 more
doaj   +2 more sources

Study on Gel–Resin Composite for Losting Circulation Control to Improve Plugging Effect in Fracture Formation [PDF]

Gels
Lost circulation, a prevalent challenge in drilling engineering, poses significant risks including drilling fluid loss, wellbore instability, and environmental contamination.
Jinzhi Zhu, Tao Wang, Shaojun Zhang, Yingrui Bai, Guochuan Qin, Jingbin Yang   +5 more
doaj   +2 more sources

A Direct Eulerian GRP Scheme for the Prediction of Gas-Liquid Two-Phase Flow in HTHP Transient Wells

Abstract and Applied Analysis, 2013
A coupled system model of partial differential equations is presented in this paper, which concerns the variation of the pressure and temperature, velocity, and density at different times and depths in high temperature-high pressure (HTHP) gas-liquid two-
Jiuping Xu, Min Luo, Jiancheng Hu, Shize Wang, Bin Qi, Zhiguo Qiao   +5 more
doaj   +1 more source

Data analyses on temperature-dependent behaviour of water based drilling fluid rheological models

Data in Brief, 2018
For this data article, the accuracy of different rheological models in estimation of rheological parameters of a bentonite-gel, water-based mud under ambient and elevated conditions were examined.
P.A.L. Anawe, J. Adewale Folayan
doaj   +1 more source

Experimental Study and Rheological Modeling of Water-Based and Oil-Based Drilling Fluids Under Extreme Temperature–Pressure Condition

Energies
With the growing demand for energy, oil and gas exploration and development are progressively moving into deep and ultra-deep formations, where extreme temperatures and pressures create complex challenges for drilling operations.
Haishen Lei, Chun Cai, Baolin Zhang, Jing Luo, Ping Chen, Dong Xiao   +5 more
doaj   +1 more source

http://jase.tku.edu.tw/articles/jase-202404-27-4-0006

Journal of Applied Science and Engineering
High pressure, narrow mud window and well control risks are common challenges encountered in High Temperature High Pressure (HTHP) wells. Reducing the complexity of incidents and ensuring the safety while drilling in high pressure and narrow mud window ...
Geng Hao, Xiong Qingshan, Cui Shuqing, Liuyu, Shi Fang, Kamgue Lenwoue Arnaud Regis, Wang Ke, Shou Xiang   +7 more
doaj   +1 more source

A simulation experiment method for HTHP gas well productivity

Natural Gas Industry B, 2021
In recent years, a series of major natural gas exploration discoveries and breakthroughs have been achieved in deep and ultra-deep carbonate gas reservoirs in the Sichuan Basin, and all discovered gas reservoirs are characterized by great burial depth ...
Keming Zhou, Nong Li, Tingzhi Liu, Jiahuan He, Huajie Yu, Mengwen Zou   +5 more
doaj   +1 more source

Thermodynamic Controls on the Competition Between CO2 Solute Transport and Retention in Fracture‐Pore Media: Insights From Real‐Basalt Microfluidics

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract Reactive‐surface exposure during basalt carbonation is controlled by the entry and retention of fracture‐transported CO2 solute within adjacent pores, yet these pore‐scale processes remain poorly constrained under reservoir temperature and pressure.
Zhiqiang Luo, Mengyi Li, Tengyu Ma, Zhijun Wu   +3 more
wiley   +1 more source