Results 31 to 40 of about 11,928 (225)

Evolution Law of Wellbore Instability Risk under Fluctuating Pressure

Energies, 2023
The bottom hole fluctuating pressure has a large influence on the wellbore instability. To address this problem, firstly, according to the principle of seepage mechanics, we established a calculation model of the change in pore pressure around the ...
Kai Zhao, Wenjie Song, Jingen Deng, Qiang Tan, Xiaoyun Wang   +4 more
doaj   +1 more source

Temperature dependent characterization of optical fibres for distributed temperature sensing in hot geothermal wells

, 2012
This study was performed in order to select a proper fibre for the application of a distributed temperature sensing system within a hot geothermal well in Iceland. Commercially available high temperature graded index fibres have been tested under in-situ
Albertsson A, Carter E C, Cella J A, DuPont, Ikeda N, Jan Henninges, Kaura J Sierra J, Lee C, Lemaire P J, Norman R Weiss J Krumhansl J, Smithpeter C Norman R Krumhansl J Benoit D Thompson S, Thomas Reinsch   +11 more
core   +1 more source

Thermo-mechanical analysis of wellbore stability in ultra-deep formations

Journal of Rock Mechanics and Geotechnical Engineering
Wellbore 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, Qian Wang, Fujian Yang, Dawei Hu, Yunhu Lu, Hui Zhou   +5 more
doaj   +1 more source

The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production

Energies, 2019
Gas hydrates have great potential as future energy resources. Several productivity and stability analyses have been conducted for the Ulleung Basin, and the depressurization method is being considered for production.
Jung-Tae Kim, Ah-Ram Kim, Gye-Chun Cho, Chul-Whan Kang, Joo Yong Lee   +4 more
doaj   +1 more source

Geomechanical analysis of an oil field: Numerical study of wellbore stability and reservoir subsidence

Petroleum Research, 2023
Geomechanics as the knowledge of rock deformation and stability is an indispensable part of all field development plans. Conducting geomechanical analyses leads to a safer and more efficient operation otherwise different kinds of instability and ...
Saeed Shad, Parvin Kolahkaj, Davood Zivar   +2 more
doaj   +1 more source

Study of wellbore instability in shale formation considering the effect of hydration on strength weakening

Frontiers in Earth Science
Shale formations often contain a high proportion of clay minerals, which, upon contact with drilling fluid, undergo hydration expansion. This leads to wellbore instability, a problem that poses significant challenges globally.
Shaopeng Li, Peng Zhou, Baofeng Lan
doaj   +1 more source

Present-day stress orientations and tectonic provinces of the NW Borneo collisional margin [PDF]

, 2010
Extent: 15p.Borehole failure observed on image and dipmeter logs from 55 petroleum wells across the NW Borneo collisional margin were used to determine maximum horizontal stress (σH) orientations; combined with seismic and outcrop data, they define seven
Agostinelli, Ali, Barton, Bell, Bell, Bell, Bol, Brudy, Christopher K. Morley, Franke, Hall, Hall, Hamilton, Hazebroek, Hazebroek, Heidbach, Hesse, Hillis, Hillis, Hinz, Hinz, Hiscott, Hutchison, Ingram, James, James Clark, King, King, King, King, King, Kirsch, Lambiase, Madon, Madon, Madon, Madon, Mandl, Mardia, Mark R. P. Tingay, Mastin, McGilvery, Michel, Milsom, Morley, Morley, Morley, Morley, Morley, Morley, Peška, Plumb, Richard R. Hillis, Richardson, Rosalind C. King, Sandal, Simons, Sonder, Sperner, Tan, Tingay, Tingay, Tingay, Tingay, Tingay, Tingay, Tingay, Townend, Van Viet, Yale, Yale, Yassir, Zhang, Zoback   +73 more
core   +2 more sources

2D Numerical Simulation of Improving Wellbore Stability in Shale Using Nanoparticles Based Drilling Fluid

Energies, 2017
The past decade has seen increased focus on nanoparticle (NP) based drilling fluid to promote wellbore stability in shales. With the plugging of NP into shale pores, the fluid pressure transmission can be retarded and wellbore stability can be improved ...
Jiwei Song, Ye Yuan, Sui Gu, Xianyu Yang, Ye Yue, Jihua Cai, Guosheng Jiang   +6 more
doaj   +1 more source

Integrated mechanical earth model and quantitative risk assessment to successful drilling

Journal of Petroleum Exploration and Production Technology, 2020
Use of vital geomechanical parameters for determination of safe mud pressure window is generally associated with high level of uncertainty primarily because of absence of sufficient calibration data including laboratory and field test information.
Alireza Noohnejad, Kaveh Ahangari, Kamran Goshtasbi   +2 more
doaj   +1 more source

Thermoporoelastoplastic Wellbore Breakout Modeling by Finite Element Method

Mining, 2022
Drilling a hole into rock results in stress concentration and redistribution close to the hole. When induced stresses exceed the rock strength, wellbore breakouts will happen. Research on wellbore breakout is the fundamental of wellbore stability.
Lijing Zhang, Hua Zhang, Kezhen Hu, Zhuoheng Chen, Shunde Yin   +4 more
doaj   +1 more source