Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2013894118 |
Public data from three US states provide new insights into well integrity | |
Greg Lackey; Harihar Rajaram; James Bolander; Owen A. Sherwood; Joseph N. Ryan; Chung Yan Shih; Grant S. Bromhal; Robert M. Dilmore | |
2021-04-06 | |
发表期刊 | Proceedings of the National Academy of Sciences
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出版年 | 2021 |
英文摘要 | Oil and gas wells with compromised integrity are a concern because they can potentially leak hydrocarbons or other fluids into groundwater and/or the atmosphere. Most states in the United States require some form of integrity testing, but few jurisdictions mandate widespread testing and open reporting on a scale informative for leakage risk assessment. In this study, we searched 33 US state oil and gas regulatory agency databases and identified records useful for evaluating well integrity in Colorado, New Mexico, and Pennsylvania. In total, we compiled 474,621 testing records from 105,031 wells across these states into a uniform dataset. We found that 14.1% of wells tested prior to 2018 in Pennsylvania exhibited sustained casing pressure (SCP) or casing vent flow (CVF)—two indicators of compromised well integrity. Data from different hydrocarbon-producing regions within Colorado and New Mexico revealed a wider range (0.3 to 26.5%) of SCP and/or CVF occurrence than previously reported, highlighting the need to better understand regional trends in well integrity. Directional wells were more likely to exhibit SCP and/or CVF than vertical wells in Colorado and Pennsylvania, and their installation corresponded with statewide increases in SCP and/or CVF occurrence in Colorado (2005 to 2009) and Pennsylvania (2007 to 2011). Testing the ground around wells for indicators of gas leakage is not a widespread practice in the states considered. However, 3.0% of Colorado wells tested and 0.1% of New Mexico wells tested exhibited a degree of SCP sufficient to potentially induce leakage outside the well. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/321047 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Greg Lackey,Harihar Rajaram,James Bolander,et al. Public data from three US states provide new insights into well integrity[J]. Proceedings of the National Academy of Sciences,2021. |
APA | Greg Lackey.,Harihar Rajaram.,James Bolander.,Owen A. Sherwood.,Joseph N. Ryan.,...&Robert M. Dilmore.(2021).Public data from three US states provide new insights into well integrity.Proceedings of the National Academy of Sciences. |
MLA | Greg Lackey,et al."Public data from three US states provide new insights into well integrity".Proceedings of the National Academy of Sciences (2021). |
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