Oil and gas wells can develop gas leaks along the casing years after production has stopped and the well has been plugged and abandoned. Explanations include channeling, poor cake removal, shrinkage, and high cement permeability. The reason is probably cement shrinkage that leads to circumferential fractures that are propagated upward by the slow accumulation of gas under pressure behind the casing.
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All About Plastic
A booklet designed to show the magnitude of today’s problem and to encourage you to become involved in finding solutions. Download pdf.
Local TV news coverage of environmental issues
New study of Pittsburgh local TV news coverage of fracking and other environmental issues: “Just Because Fracking Doesn’t Bleed, Doesn’t Mean It Can’t Lead: How Coverage of Shale Gas Fracking and Other Environmental Stories Rank on Local Television News.“
Environment – Pittsburgh Post Gazette
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