Results 31 to 40 of about 504,172 (167)

THE ANALYSIS OF WELLBORE INSTABILITY BASED ON THE HOEK-BROWN FAILURE CRITERION USING GEOMECHANICAL UNITS AND DISCONTINUITIES EVALUATION

Rudarsko-geološko-naftni Zbornik
The accuracy of wellbore instability assessment becomes reliable when sufficient geomechanical model data and appropriate failure criteria parameters are used.
Mohamadali Chamanzad, Majid Nikkhah, Ahmad Ramezanzadeh, Misha Pezeshki, Imandokht Mostafavi   +4 more
doaj   +1 more source

Modelling of Time-Dependent Wellbore Collapse in Hard Brittle Shale Formation under Underbalanced Drilling Condition

Geofluids, 2019
In recent years, the lithologic traps in a mid-depth formation are the focus of oil or gas exploration and development for eastern oilfields in China.
Shanpo Jia, Zhiqiang Xiao, Bisheng Wu, Caoxuan Wen, Lufeng Jia   +4 more
doaj   +1 more source

Multi‐factor coupling effects in hydraulic fracturing of laminated shale: Experimental insights and physics‐informed neural network‐driven optimization

Deep Underground Science and Engineering, EarlyView.
This study establishes a multi‐factor coupling framework for predicting breakdown pressure in laminated shale by integrating experimental hydraulic fracturing tests, physics‐informed neural networks (PINNs), and Sobol sensitivity analysis. It reveals how differential stress, the bedding dip angle, and the injection rate interact to influence fracture ...
Tao Wang, Guoyao Xu, Liyuan Liu, Yao Zhang, Sitao Zhu, Hongyang Chu, Kaikai Zhao   +6 more
wiley   +1 more source

Experimental study and prediction method of solid destabilization and production in deep carbonate reservoir during mining

Journal of Rock Mechanics and Geotechnical Engineering
Wellbore instability is one of the significant challenges in the drilling engineering and during the development of carbonate reservoirs, especially with open-hole completion.
Bo Zhou, Changyin Dong, Fansheng Huang, Dongyu Xue, Haobin Bai, Guolong Li   +5 more
doaj   +1 more source

Modeling proppant transport and settling in a 3D propagating fracture

Deep Underground Science and Engineering, EarlyView.
A versatile multiphysics tool is presented for simulating the complex processes involved in hydraulic fracturing treatments. The model couples fracture opening and propagation, variable‐density slurry flow, and proppant particle transport within the multiphysics object‐oriented simulation environment framework, based on two‐phase mixture equations and ...
Robert Egert, Aimé Fournier, Wencheng Jin   +2 more
wiley   +1 more source

Geomechanical analysis of the wellbore instability problems in Nahr Umr Formation southern Iraq [PDF]

, 2017
Wellbore instability problems play a major rule of increasing nonproductive time (NPT) during drilling processes. In most cases, the cost of drilling a well can be reduced by designing a suitable operational window using geomechanical models.
Mohammed, Haider Qasim
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

Major engineering breakthrough of Well XA‐1, the deepest ten‐thousand‐meter well in a global sedimentary basin

Deep Underground Science and Engineering, EarlyView.
Well XA‐1, completed at a true vertical depth of 11 156 m in the Shawan Sag of the Junggar Basin, is the deepest predominantly near‐vertical well drilled in a sedimentary basin. The figure shows the basin's tectonic framework and well location (a), a structural cross‐section spanning the Shawan Sag and adjacent uplifts (b), and the stratigraphic column
Fangkai Liu, Qingwen Tan, Sen Zhu, Guangyou Zhu   +3 more
wiley   +1 more source

Chemical-Mechanical Modeling of Wellbore Instability in Shales

, 1998
Shales make up over 75% of drilled formations and cause over 90% of wellbore instability problems. The drilling of shale can result in a variety of problems ranging from washout to complete collapse of the hole.
Humbert Fonseca, Carlos Fernando
core   +1 more source

Wellbore stability analysis and safe mud weight window selection in the Halfaya oil field

Iraqi Journal of Chemical and Petroleum Engineering
   Drilling operations in the Halfaya oilfield frequently encounter severe wellbore instability challenges. When navigating shale deposits, wellbore instability remains the primary operational concern.
Maytham Ismael Saddam, Ghanim M. Farman, Dhifaf Sadeq   +2 more
doaj   +1 more source