Results 91 to 100 of about 5,297 (218)

Gryphon Injection Wing Modeling [PDF]

, 2010
Imperial Users ...
Bayetova, Raushan, Bayetova, Raushan
core  

Effect of single straight, intersecting and T-shaped natural fractures on horizontal wellbore stability in shale reservoirs

Journal of Petroleum Exploration and Production Technology
The development of natural fractures can easily lead to horizontal wellbore instability caused by stress concentration after drilling in shale reservoirs, which is not conducive to the safe development of shale gas, but how different natural fractures ...
Xiaoming Wang, Junbin Chen, Hao Wang, Yifan Luo   +3 more
doaj   +1 more source

Simulation of Wellbore Stability during Underbalanced Drilling Operation

Journal of Applied Mathematics, 2017
The wellbore stability analysis during underbalance drilling operation leads to avoiding risky problems. These problems include (1) rock failure due to stresses changes (concentration) as a result of losing the original support of removed rocks and (2 ...
Reda Abdel Azim
doaj   +1 more source

Strengthening shale wellbore with silica nanoparticles drilling fluid

Petroleum, 2016
Nanoparticles have been widely used to reduce wellbore instability problems of shale formation. In this paper, nanoparticle-containing water-based drilling fluids (WBDFs) and oil-based drilling fluids (OBDFs) were evaluated by running three new tests ...
Yili Kang, Jiping She, Hao Zhang, Lijun You, Minggu Song   +4 more
doaj   +1 more source

An intelligent algorithm for identifying dropped blocks in wellbores

Natural Gas Industry B
Real-time monitoring of wellbore stability during drilling is crucial for the early detection of instability and timely interventions. The cause and type of wellbore instability can be identified by analyzing the dropped blocks brought to the surface by ...
Qian Wang, Zixuan Yang, Chenxi Ye, Wenbao Zhai, Xiao Feng   +4 more
doaj   +1 more source

Принципи вибору компоновок низу бурильної колони для буріння похилих ділянок свердловин [PDF]

, 2014
Розглянуто модель вибору багатоопорних компоновок низу бурильної колони (КНБК) для буріння похилих ділянок свердловин, наведено принципи побудови оцінок ризику в умовах інформаційної невизначеності.
Долик, Р. М., Мислюк, М. А.   +1 more
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Wellbore stability analysis to determine the safe mud weight window for sandstone layers

Petroleum Exploration and Development, 2019
The wellbore stability of a vertical well through the sandstone reservoir layers of the Asmari oil-bearing formation in south-west Iran is investigated. The safe drilling-fluid density range for maintaining wellbore stability is determined and simulated ...
Ayoub DARVISHPOUR, Masoud CHERAGHI SEIFABAD, David Anthony WOOD, Hamzeh GHORBANI   +3 more
doaj   +1 more source

Determination of Optimum Mud Weight Window for Tanuma Formation in Southern Iraq

Journal of Engineering
Problems with borehole instability contribute to an increase in non-productive time, mostly when drilling shale rocks. Drilling in this layer has several issues, including mud loss, tight holes, mechanically stuck pipes, caving, and large holes ...
Hussien Luqman Abd, Hassan A. Abdul Hussein   +1 more
doaj   +1 more source

External review of the storage plan for the Peterhead Carbon Capture and Storage Project [PDF]

, 2014
This document summarises the findings of an external independent review of the storage plan for the proposed Peterhead Carbon Capture and Storage project which aims to store up to 20 million tonnes (Mt) of CO2 within the framework of the European ...
Chadwick, A., Ford, J., Hannis, S., Holloway, S., Mackay, E., Pickup, G., Rochelle, C., Somerville, J., Tohidi, B., Williams, J.   +9 more
core  

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