Oil spills, 1971-75, Gulf of Mexico outer continental shelf

Danenberger, Elmer P.

doi:10.3133/cir741

Cited by 3 publications

(1 citation statement)

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“…Including all of these risks allows the risks of the proposed OCS leasing to be compared to those of other alternatives, such as importing oil. Previous USGS data on OCS accidents (Danenberger, 1976;1980) are included in the data base, but comprise only a part of the data. In some past model runs, only spills larger than 1,000 barrels (bbl) were considered.…”

Section: Probability Of Oil Spills Occurringmentioning

confidence: 99%

An oilspill risk analysis for the South Atlantic (proposed sale 56) outer continental shelf lease area

Samuels¹,

Lanfear²

1980

Open-File Report

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Section: Probability Of Oil Spills Occurringmentioning

confidence: 99%

An oilspill risk analysis for the South Atlantic (proposed sale 56) outer continental shelf lease area

Samuels¹,

Lanfear²

1980

Open-File Report

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Oil in the Beaufort and Mediterranean Seas

Mackay¹

1977

ARCTIC

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ABSTRACT. Spillage of oil into the Beaufort Sea in the course of exploration and exploitation of offshore resources may occur at an estimated rate of 20 milligrams per square metre per year, or about one-fifth the rate of spillage into the Mediterranean Sea. Overall rates of degradation and dispersion of spilled oil under the conditions prevailing in the Beaufort Sea are however liiely to be significantly slower than under the conditions in the Mediterranean. .The various input, degradation and dispersion rates may be interrelated in the form of a simple algebraic equation. From current estimates of these rates it is suggested that standing concentrations of oil in the Beaufort Sea could in time become comparable to those in the Mediterranean.RbUMfi. Le pCtroIe dans les mers de Beaufort et Méditerranée. Le déversement du pétrole dans la mer de Beaufort au cours de l'exploration et de l'exploitation des ressources s i t u b s B une certaine distance des c8tes peut se produire un d6bit estim6 B 20 milligrammes par mbtre carré par an, c'est-%-dire B un débit d'environ un cinquibme de celui de la Méditerranée. Cependant, étant donné les conditions qui rhgnent dans la mer de Beaufort, il est probable que l'ensemble des vitesses de dégradation et de dispersion du pétrole dbversé est nettement plus lent que dans la Méditerranée oh ces conditions sont différentes. Les diverses vitesses des quantités ddversées, de degradation et de dispersion peuvent être r e l i b entre elles sous la forme d'une simple équation alg6brique. Des estimations courantes de ces vitesses on dWuit que les concentrations actuelles du pétrole dans la mer de Beaufort pourraient, avec le temps, devenir comparables 21 celles de la MWiterranb.

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The oilspill risk analysis model of the U. S. Geological Survey

Smith¹,

Slack²,

Wyant³

et al. 1982

Professional Paper

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The U.S. Geological Survey has developed an oilspill risk analysis model to aid in estimating the environmental hazards of developing oil resources in Outer Continental Shelf (OCS) lease areas. The large, computerized model analyzes the probability of spill occurrence, as well as the likely paths or trajectories of spills in relation to the locations of recreational and biological resources which may be vulnerable. The analytical methodology can easily incorporate estimates of weathering rates, slick dispersion, and possible mitigating effects of cleanup.The probability of spill occurrence is estimated from information on the anticipated level of oil production and method and route of transport. Spill movement is modeled in Monte Carlo fashion with a sample of 500 spills per season, each transported by monthly surface-current vectors and wind velocities sampled from 3-hour windtransition matrices. Transition matrices are based on historic wind records grouped in 41 wind velocity classes, and are constructed seasonally for up to six wind stations. Locations and monthly vulnerabilities of up to 31 categories of environmental resources are digitized within an 800,000 km2 study area. Model output includes tables of conditional impact probabilities (that is, the probability of hitting a resource, given that a spill has occurred), as well as probability distributions for oilspills occurring and contacting environmental resources within preselected vulnerability time horizons.The model provides the U.S. Department of the Interior with a method for realistically assessing oilspill risks associated with OCS development. To date, it has been used in oilspill risk assessments for eight OCS lease sales with the results reported in Federal environmental impact statements. A summary of results is presented herein. A "real time" version was also used to forecast the movement of oil from the 1976-77 Argo Merchant oilspill. Additional model runs are planned for future OCS lease sales in frontier areas. Other possible applications include analysis of OCS development alternatives and site selection for oilspill cleanup equipment.

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Oil spills, 1971-75, Gulf of Mexico outer continental shelf

Abstract: Causes of 1-to 50-barrel spills on production platforms, 1971-75, grouped according to system that failed.

Cited by 3 publications

References 1 publication

An oilspill risk analysis for the South Atlantic (proposed sale 56) outer continental shelf lease area

An oilspill risk analysis for the South Atlantic (proposed sale 56) outer continental shelf lease area

Oil in the Beaufort and Mediterranean Seas

The oilspill risk analysis model of the U. S. Geological Survey

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