Results 161 to 170 of about 2,284,708 (212)

Thermoporoelastic Effect on Wellbore Stability

SPE Journal, 2005
SummaryThis paper presents the consistency of thermal effects (i.e., the thermal-induced pore pressure and rock stresses) between two available models for inclined boreholes. Thermal effects for both a permeable and an impermeable boundary are studied.
Guizhong Chen, Russell T. Ewy
openaire   +1 more source

Uncertainty evaluation of wellbore stability model predictions

Journal of Petroleum Science and Engineering, 2013
Abstract There is an increasing concern in the oil and gas industry regarding wellbore stability problems. The need to improve well operations becomes more imperative as the operators move towards more challenging and harsher environments such as ultra-deep waters and high-pressure and high-temperature (HPHT) fields ...
John Emeka Udegbunam, Bernt Sigve Aadnøy, Kjell Kåre Fjelde   +2 more
openaire   +1 more source

Wellbore-Stability Analysis Made Easy and Practical

SPE Drilling & Completion, 1996
Summary Recent years have seen much scientific and technical progress in the understanding of wellbore stability. The main causes of instabilities have been identified, models have been developed, and practical remedies proposed and often tried successfully in the field. Yet despite this scientific effort, extra drilling costs associated
F. J. Santarelli, S. Zaho, G. Burrafato, F. Zausa, D. Giacca   +4 more
openaire   +1 more source

Laboratory Evaluation Of Chemical Grouts for Wellbore Stabilization

Proceedings of Nigeria Annual International Conference and Exhibition, 2003
Abstract Wellbore drilling in highly fractured and unstable formations has always been one of the greatest difficulties in drilling operations. Failure and collapse of wellbore wall frequently occur in the fractured zone and may ultimately obstruct any further drilling of the wellbore. A number of techniques have been proposed and tested
D. Li, G. Chen, G. A. Chukwu, S. L. Patil, S. Khataniar   +4 more
openaire   +1 more source

Wellbore Trajectory Optimization Using Rate of Penetration and Wellbore Stability Analysis

SPE International Heavy Oil Conference and Exhibition, 2018
Abstract Drilling deviated wells is a frequently used approach in the oil and gas industry to increase the productivity of wells in reservoirs with a small thickness. Drilling these wells has been a challenge due to the low rate of penetration (ROP) and severe wellbore instability issues.
Ahmed K. Abbas, Usama Alameedy, Mortadha Alsaba, Salih Rushdi   +3 more
openaire   +1 more source

Wellbore Stability in Fractured Rock

IADC/SPE Drilling Conference and Exhibition, 2010
AbstractNumerous wellbore instability problems related to drilling through potentially fractured formations have been reported. Often, these rocks are characterized by the abundance of macro and micro scale bedding planes and/or networks of natural fractures.
openaire   +1 more source

Research on Dynamic Wellbore Stability Based on Wellbore Seepage

Due to the mutual flow between drilling mud and formation fluid, the pore pressure in the surrounding rock of the wellbore directly affects the rock’s mechanical properties. Since the properties and density of drilling mud are adjusted in real time during drilling operations, wellbore stability is inherently a dynamic process.
Xinyu Liu, Jian Xiong
openaire   +1 more source

The Stability of Inclined and Fractured Wellbores

SPE Journal, 2016
SummaryThe theory of linear-elastic fracture mechanics is used to develop an analytical solution for a wellbore in an isotropic elastic medium when drilled inclined to a general state of 3D far-field stress, and attached to which are an arbitrary number of N straight and axially aligned fractures.
openaire   +1 more source

The Effect of the Thermal Stress on Wellbore Stability

SPE India Oil and Gas Conference and Exhibition, 1998
Abstract The thermal stress near the wellbore occurs because the temperature near the wellbore is changed by mud in well. The stress distribution near the wellbore is changed by the thermal stress, Eventually, the wellbore stability is affected.
Lin Tang, Pinya Luo
openaire   +1 more source

Modeling Aspects of Wellbore Stability in Shales

SPE Latin American and Caribbean Petroleum Engineering Conference, 2001
Abstract Drilling problems associated with wellbore instability are normally aggravated when crossing shale layers. Instabilities in shales may be caused by a complex mechanism of shale-drilling fluid interaction and by the overstress of the rock formation.
M. Frydman, S.A.B. Fontoura
openaire   +1 more source