One of the problems during drilling operation is wellbore instability. Many parameters affect
the wellbore stability. Some of these parameters are related to the properties of drilling mud …

Wellbore stability is one of the most significant problems observed during drilling practice.
Determination of safe mud weigh window is hence critically important in order to avoid …

In this paper, we review a suite of techniques for determination of in situ stress orientation
and magnitude in deep wells and boreholes. As these techniques can be utilized in both …

In this study, 31 empirical equations are summarized that relate unconfined compressive
strength and internal friction angle of sedimentary rocks (sandstone, shale, and limestone …

Petroleum Rock Mechanics: Drilling Operations and Well Design, Second Edition, keeps
petroleum and drilling engineers centrally focused on the basic fundamentals surrounding …

We utilize quantitative risk assessment (QRA) to calculate the conditional probability of slip
on mapped faults in response to injection-related increases in pore pressure in north-central …

In order to classify rocks and design structures either upon or inside a rock mass, strength
and deformability characteristics of the rock are of vital importance. Strength and …

Most old oil and gas fields worldwide are depleted, making drilling in these sedimentary
zones extremely difficult, especially in complex pore pressure regimes when they are …

This work presents the assessment of present-day stresses and pore pressures in a prolific
onshore hydrocarbon bearing field located in the southern Cambay Basin, western India …

Abstract The Carboniferous and Permian sedimentary rocks (mainly the Shanxi and Taiyuan
formations) in the Linxing region, eastern Ordos Basin, China, host a significant volume of …