Tag Archive: cement failure

Noble gases identify the mechanisms of fugitive gas contamination in drinking-water wells overlying the Marcellus and Barnett Shales

Noble gases identify the mechanisms of fugitive gas contamination in drinking-water wells overlying the Marcellus and Barnett Shales Author(s): Thomas H. Darrah, Avner Vengosh, Robert B. Jackson and Nathaniel R. Warner Date: 09.2014 Source / Publisher: PNAS Key findings: Analysis on mechanisms that cause elevated hydrocarbon concentrations in drinking water near natural-gas wells –> Gas …

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Oil and gas wells and their integrity: Implications for shale and unconventional resource exploitation

Oil and gas wells and their integrity: Implications for shale and unconventional resource exploitation Author(s): Richard J. Davies, Sam Almond, Robert S. Ward, Robert B. Jackson, Charlotte Adams, Fred Worrall, Liam G. Herringshaw, Jon G. Gluyas, Mark A. Whitehead Date: 08.2014 Key findings: Oil and gas wells that were drilled over the last 100 years …

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Assessment and risk analysis of casing and cement impairment in oil and gas wells in Pennsylvania, 2000–2012

Assessment and risk analysis of casing and cement impairment in oil and gas wells in Pennsylvania, 2000–2012 Author(s): Anthony R. Ingraffea, Martin T. Wells and Renee L. Santoro Date: 01.2014 Source / Publisher: PNAS Key findings: The study analyzed publicly available Pennsylvania Department of Environmental Protection inspection reports on more than 41,000 oil and gas …

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Evaluation of the Potential for Gas and CO2 Leakage Along Wellbores

Evaluation of the Potential for Gas and CO2 Leakage Along Wellbores Author(s): Stefan Bachu and Theresa Watson Date: 03.2009 Source/Publisher: SPE Drilling & Completion 01/2009; 24(1):115-126. DOI: 10.2118/106817-MS ABSTRACT Implementation of CO2 storage in geological media requires proper assessment of the risk of CO2 leakage from storage sites. Leakage pathways may exist through and along …

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From Mud to Cement – Building Gas Wells

Graph: Wells with sustained casing pressure (SCP; which is a sign of lacking well integrity) by age. Statistics from the United States Mineral Management Service (MMS) show the percentage of wells with SCP for wells in the outer continental shelf (OCS) area of the Gulf of Mexico, grouped by age of the wells. These data do not include wells in state waters or land locations.

From Mud to Cement – Building Gas Wells A Schlumberger Oilfield Review It is claimed, that “demand for natural gas increases”, and “wellbore construction across gas-bearing formations takes center stage. With few cost-effective remedial measures available, prevention of annular gas flow and sustained casing pressure is key to drilling and completing long-lasting gas wells.” Author(s): …

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Why Oilwells Leak: Cement Behavior and Long-Term Consequences

SPE 64733 Why Oilwells Leak: Cement Behavior and Long-Term Consequences Maurice B. Dusseault, SPE, Porous Media Research Institute, University of Waterloo, Waterloo, Ontario; Malcolm N. Gray, Atomic Energy of Canada Limited, Mississauga, Ontario; and Pawel A. Nawrocki, CANMET, Sudbury, Ontario Society of Petroleum Engineers Inc. (2000) Author(s): Maurice B. Dusseault Date: 11.2000 Key findings: Oil …

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