Oilfields can be as clean as any other kind of mining if the operators are careful—and there's the rub. Photo by Andrew Alden

This week a consultant’s report basically stated that hydraulic fracturing in one of the country’s largest urban oilfields is not harmful. The study will arouse lots of comment by proponents and opponents of “fracking,” but both sides will find limited support for their arguments.

The oilfield in question is the Inglewood field, which has been drilling and pumping in the Baldwin Hills, in Southern California, for 82 years as the cities of Los Angeles County engulfed the country around it on all sides. Now it’s flanked by the 10 and 405 freeways and overlooks Culver City, east of Santa Monica. It makes a good test case for the future, because oil and gas producers will not disappear as cities expand around them. Both parties will need to learn how to cooperate.

The Baldwin Hills Community Standards District is a set of regulations recently created by Los Angeles County that governs operations in the Inglewood field. Part of a lawsuit settlement obliged the field’s current operator, Plains Exploration & Production Company or PXP, to carry out a study of its most advanced fracking technology. The final report from that study was released to the public yesterday and can be downloaded from inglewoodoilfield.com.

Fracking is a set of oilfield techniques in which rock is gently shattered and grit washed into the resulting microcracks. The grit holds the cracks open allowing oil and gas to be pumped out. For the study, PXP tested two varieties of fracking on each of two vertical wells in the Inglewood field: “high-volume” and “high-rate gravel pack” techniques. Both are appropriate for the extremely fine grained shale rock that fracking is designed for.

Naturally, everyone at PXP was on their best behavior for these tests, going by the book in every respect. As a result, and to no one’s surprise, the wells were properly sealed, the petroleum-producing zone (7500 feet below the fresh groundwater of the Los Angeles basin) did not contaminate anything, no earthquakes were triggered, the ground did not shift by a millimeter, the noise and pollution were insignificant, and no public-health impact was detected.

This is par for the course, and should have been expected. California is a mature petroleum producer, for once not part of the gold rush for shale oil that is stirring up controversy in the Northeast and Midwest. The problem in California is the combination of lax operations and lax oversight, leaving us at the mercy of notorious incidents and high rhetoric. The Inglewood field study does not exonerate the industry (whose response is “of course they should say it’s OK”), nor should it reduce the vigilance of fracking opponents (whose response to the study is “of course they would say it’s OK”).

I did find it a bit odd that the peer reviewers of the study were both geologists who were educated in the East and practice in the East. But perhaps that was a smart step, because the eastern states are hotbeds of fracking and public anxiety too. The reviewers would not be strangers to that. And their “peer reviewer comment letter” mentions a long process of give-and-take in clarifying the study report that must have benefited from not being overly familiar with the Los Angeles oil patch.

The Natural Resources Defense Council, which participated in the lawsuit that led to this study, issued a measured response on its blog. Food and Water Watch declared the study “an example of shill science at its worst.” Uprising Radio was undeterred in noting that the state has no regulations for fracking. This is true, and awkward, but state rules are in the works that should start to help turn mutual suspicion to watchful coexistence. Perhaps this study will inform those regulations.

Fracking in Urban Oilfields: A New Study Sparks More Debate 29 October,2012Andrew Alden

Author

Andrew Alden

Andrew Alden earned his geology degree at the University of New Hampshire and moved back to the Bay Area to work at the U.S. Geological Survey for six years. He has written on geology for About.com since its founding in 1997. In 2007, he started the Oakland Geology blog, which won recognition as "Best of the East Bay" from the East Bay Express in 2010. In writing about geology in the Bay Area and surroundings, he hopes to share some of the useful and pleasurable insights that geologists give us—not just facts about the deep past, but an attitude that might be called the deep present.

Read his previous contributions to QUEST, a project dedicated to exploring the Science of Sustainability.

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