Research Categories / Chemical Treating Agents

OSRR-681-Laboratory-Scale Investigation of a Method for Enhancing the Effectiveness of Oil Dispersants in Destabilizing Water-in-Oil Emulsions

The research investigated the feasibility of enhancing the de-emulsifying properties of commercially available oil dispersants by modifying the composition and fraction of polar constituents in the oil phase of water-in-oil emulsions and increasing the pH of the emulsion aqueous phase.

The following tasks were accomplished during the research effort:

OSRR-683-Using Oil Herding Agents for Rapid Response In Situ Burning of Oil Spills on Open Water

The objective of this research was to evaluate the feasibility of using herders to enable in situ burning as a rapid-response technique in open water. This research was accomplished by performing experiments in the laboratory with the US Navy's hydrocarbon based herder formulation and the best silicone herder formulation to find the most effective product for various water temperatures.

OSRR-685-Operational Chemical Dispersant Research at Ohmsett

This project is a direct continuation of Project 638 Chemical Dispersant Research at Ohmsett: Phase 2. The objective of the research is to advance the state of the art and knowledge in chemical dispersant use in marine spill applications. Three separate projects will be conducted: Validation of Time Window for Dispersant Use Model
Comparison of Small Scale Dispersant Testing Methods to Ohmsett Results: The Effects of Dispersant Type and Oil Properties

Assessment of Dispersant Effectiveness using Ultrasound to Measure Oil Droplet Particle Size Distributions

The goal of this proof-of-concept project was to develop novel ultrasonic scattering methods to measure the droplet size of dispersed oil to provide technologies to monitor the efficacy of subsea dispersant application. ARA developed ultrasonic measurements to determine the crude oil droplet size of dispersed oil to monitor/determine the efficacy of dispersants as a function of oil type, dispersant type, dispersant-to-oil ratio, water temperature, oil temperatures, and the presence of sediment on the effectiveness of dispersants.

OSRR-590-Changes with Dispersant Effectiveness with Extended Exposure in Calm Seas

The objective of this research project is to continue to investigate the conditions that might lead to the loss of surfactants from dispersant-treated oil, so that subsequent application of breaking waves will not result in dispersion. A one-week test series will be conducted at Ohmsett - The National Oil Spill Response Test Facility. Long-term exposures of topped Oseberg crude oil will be pre-mixed with Corexit 9500 dispersant on the Ohmsett tank surface will be completed.

OSRR-698-The Roles of Gas Hydrates During the Release and Transport of Well Fluids into Deep Ocean

The objective of this project is to use existing, novel equipment for obtaining fundamental, crosscutting chemical, physical, and hydrodynamic information on fluids that could be released and transported from deep, subsea hydrocarbon reservoirs and inadvertently released into a deepwater environment. Specifically, the research will use the resulting fundamental information in numerical, thermodynamic, and plume models to comprehensively describe potential roles and impacts of gas hydrates in such a scenario. The goal is to have a comprehensive understanding of:

OSRR-595-Identification of Window of Opportunity for Chemical Dispersants on Gulf of Mexico Crude Oils

The objective of this research was to develop best-fit correlations between readily available fresh oil properties and the window of opportunity for successful chemical dispersant use on Gulf of Mexico crude oils.

The goals of the work were to:

OSRR-506-Analysis of IFO-180 and IFO-380 Oil Properties for Dispersant Window of Opportunity

This project will extend the work to complete property analyses on IFO-180 and IFO-380 fuel oils used in the June 2003 UK field trials and in the Ohmsett dispersant effectiveness experiments completed in the fall of 2003.

Tasks to be completed:

Conduct detailed oil property analyses on IFO-180 and IFO-380 fuel oils;
Write a technical report, scientific paper and powerpoint presentation that incorporate results from all analyses (SL Ross and COOGER laboratory maintained by the Canadian Department of Fisheries and Oceans) on the results of this research project.

OSRR-507-Correlating Results of Ohmsett Dispersant Test with At-Sea Trials: Workshop to Coordinate Publications and Prioritize Follow-up Research

The goal of this project was to coordinate the publications of results of the 2003 MMS-sponsored Correlating Results of Ohmsett Dispersant Tests with Identical At-Sea Trials study by SL Ross and A. Lewis 2004. The results of the other spin-off projects were aimed at correlating results of other dispersant effectiveness testing procedures with results of the June 2003 UK at-sea trials, and identify, plan and coordinate follow-up dispersant effectiveness experiments at Ohmsett.