4 research outputs found
Fracture Propagation Driven by Fluid Outflow from a Low-permeability Aquifer
Deep saline aquifers are promising geological reservoirs for CO2
sequestration if they do not leak. The absence of leakage is provided by the
caprock integrity. However, CO2 injection operations may change the
geomechanical stresses and cause fracturing of the caprock. We present a model
for the propagation of a fracture in the caprock driven by the outflow of fluid
from a low-permeability aquifer. We show that to describe the fracture
propagation, it is necessary to solve the pressure diffusion problem in the
aquifer. We solve the problem numerically for the two-dimensional domain and
show that, after a relatively short time, the solution is close to that of
one-dimensional problem, which can be solved analytically. We use the relations
derived in the hydraulic fracture literature to relate the the width of the
fracture to its length and the flux into it, which allows us to obtain an
analytical expression for the fracture length as a function of time. Using
these results we predict the propagation of a hypothetical fracture at the In
Salah CO2 injection site to be as fast as a typical hydraulic fracture. We also
show that the hydrostatic and geostatic effects cause the increase of the
driving force for the fracture propagation and, therefore, our solution serves
as an estimate from below. Numerical estimates show that if a fracture appears,
it is likely that it will become a pathway for CO2 leakage.Comment: 21 page
Gender, Race, and Class in Media : A Critical Reader
Gender, Race, and Class in Media provides students a comprehensive and critical introduction to media studies by encouraging them to analyze their own media experiences and interests. The book explores some of the most important forms of today’s popular culture—including the Internet, social media, television, films, music, and advertising—in three distinct but related areas of investigation: the political economy of production, textual analysis, and audience response. Multidisciplinary issues of power related to gender, race, and class are integrated into a wide range of articles examining the economic and cultural implications of mass media as institutions. Reflecting the rapid evolution of the field, the Sixth Edition includes 18 new readings that enhance the richness, sophistication, and diversity that characterizes contemporary media scholarship
Gender, Race, and Class in Media : A Critical Reader
This new edition of Gender, Race, and Class in Media engages students in critical media scholarship by encouraging them to analyze their own media experiences and interests. Students explore some of the most important forms of today’s popular culture—including the internet, social media, television series, films, music, and advertising—in three distinct but related areas of investigation: the political economy of production, textual analysis, and audience response. Multidisciplinary issues of power related to gender, race, and class are integrated into a wide range of articles examining the economic and cultural implications of mass media as institutions. Students not only develop a comprehensive understanding of the media culture and communication processes, but also learn how media can be used to subvert prevailing narratives that reinforce the status quo