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Summary of Externally-Driven Cavern Oil Mixing Research at SNL Including Work Performed at ASU/Notre Dame and UMass-Dartmouth

Webb, Stephen W.

Sandia National Laboratories is investigating oil mixing in underground storage caverns as part of the Strategic Petroleum Reserve (SPR) program. Oil mixing in caverns can be classified as internally - driven or externally driven. In externally - driven mixing, which is addressed in this report, processes external to the cavern and the underground environment such as the introduction and removal of fluids can cause mixing of the oil. Miscible and immiscible mixing processes are discussed. As part of this investigation, research into the fundamental mixing processes for layered caverns has been conducted by Professor H.J.S. Fernando and associates at Arizona State University (ASU) (2006 - 2009) and at the University of Notre Dame (2010 - 2012) for miscible mixing from jets. Additional research for immiscible mixing at an interface due to fluid injection was conducted at the University of Massachusetts - Dartmouth. The results of the research conducted at Sandia National Laboratories and at ASU/Notre Dame and UMass - Dartmouth are summarized in this report.