REVISED OFFSHORE OIL SPILL OCCURRENCE RATES FOR THE OUTER CONTINENTAL SHELF

1987 ◽  
Vol 1987 (1) ◽  
pp. 630B-630B
Author(s):  
Cheryl A. Anderson ◽  
Robert P. LaBelle
1983 ◽  
Vol 1983 (1) ◽  
pp. 205-209
Author(s):  
Lindon A. Onstad

ABSTRACT Exploration of outer continental shelf (OCS) lands off Southern California has been expanding at a rapid rate for the past two years. Lease Sales 48, 53, and 68 have provided the impetus for this rapid development. The Bureau of Land Management has predicted several spills in excess of 1,000 barrels will occur as a result of these sales and subsequent exploration activities. Legitimate concerns have been raised by federal, state and local governments as well as numerous citizen groups concerning the ability of industry to respond adequately to a major offshore oil spill. As a result of these concerns, the California Coastal Commission has ordered a study and evaluation of the California Oil Spill Cooperatives with an objective of ensuring they will possess an adequate response capability. Concurrent with this study, the U.S. Coast Guard and the Interior Department's Minerals Management Service have entered into a Memorandum of Understanding concerning review of oil spill plans and equipment in OCS waters. With expanding geographic areas to cover, the cooperatives have begun to purchase new state-of-the-art equipment in hopes of satisfying the regulatory agencies and concerned groups. This paper examines the process of the federal government, state of California and industry in upgrading oil spill response capability in waters offshore southern California. The process is shown to have occurred systematically with a view toward the response system rather than individual pieces of equipment. Recommendations to California concerning acceptance of federal guidelines, joint reviews and use of dispersants are discussed.


1983 ◽  
Vol 1983 (1) ◽  
pp. 355-359 ◽  
Author(s):  
Kenneth J. Lanfear ◽  
David E. Amstutz

ABSTRACT The Department of the Interior is required to evaluate the risks of oil spills from outer continental shelf (OCS) oil leasing and must compare these risks to those of other oil sources, such as importing oil. Past practice has been to treat spill occurrence as a Poisson process, with a rate proportional to the amount of oil produced or transported. U.S. oil production and accident data and worldwide tanker data were used. Criticism of this approach has centered on the validity of using oil volume as an exposure variable, and the applicability of existing accident data to frontier OCS areas. To examine these questions, the Interior Department recently sponsored several studies on OCS oil spill occurrence rates. One study compiled an extensive listing of all known oil spills of recent years and is believed to be the most complete database on oil spills available to the public. Another study looked at trends in oil spills from U.S. OCS platforms and discovered a statistically significant decrease in the spill rate since 1974. Other studies examined oil spill data for Cook Inlet and Prudhoe Bay, Alaska, and found that spill rates for these areas could not be shown to be significantly different from the U.S. OCS platform spill rate based on trend analysis. Studies are continuing to ensure that oil spill rates used by the Interior Department reflect the latest data and analyses.


2017 ◽  
Vol 2017 (1) ◽  
pp. 1931-1949
Author(s):  
Zhen-Gang Ji ◽  
Walter R. Johnson

ABSTRACT 2017-051: The U.S. Department of the Interior (DOI) Bureau of Ocean Energy Management (BOEM) maintains a leasing program for commercial oil and gas development on the Outer Continental Shelf in U.S. territorial waters. To evaluate the potential impacts of these activities, BOEM performs oil spill risk analysis (OSRA) using, in part, a statistical model for estimating the movement of hypothetical oil spills on the ocean surface based on model-generated surface wind and surface current. OSRA examines oil spill risks over long periods of time ranging from 5 years to decades. The latest OSRA analysis estimated the contact probabilities of oil spills in the Gulf of Mexico (GOM) region by modeling over 40 million hypothetical oil spill trajectories over extended areas of the U. S. continental shelf and tabulating the frequencies with which the simulated oil spills contacted designated natural resources within a specified number of days. The modeled ocean currents and wind fields used in the GOM analysis are from 1993 to 2007 (15 years). The OSRA model was also applied to analyze the contact probabilities of the Ixtoc Oil Spill, which happened on June 3, 1979 in the Bay of Campeche of the GOM and lasted for 10 months. The Ixtoc I Oil Well suffered a blowout, resulting in one of the largest oil spills in history and 3 million barrels of oil spilled. The OSRA model was applied to simulate particle trajectories released at the Ixtoc location using the same GOM current and wind field data from 1993 through 2007. The model results for the Ixtoc simulation were consistent with the descriptions of the oil spill by Hooper (1982), which shows that the OSRA model can provide a reasonable projection of the contact probabilities of hypothetical oil spills.


1994 ◽  
Vol 37 (2) ◽  
pp. 195-229 ◽  
Author(s):  
Jeffrey Hyland ◽  
Dane Hardin ◽  
Margarete Steinhauer ◽  
Doug Coats ◽  
Roger Green ◽  
...  

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