D flowpathcause 1

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Unformatted text preview: ll failure. Id. 150 60 IV. Possible Flow Paths The Panel identified three possible paths by which hydrocarbons could have flowed up the well to the rig during the initial stage of the blowout: (1) up the production casing annulus cement barrier and upward through the annulus and the wellhead seal assembly; 151 (2) up the production casing and related components from above the top wiper plug located on the float collar at 18,115 feet; or (3) up the last 189 feet of the production casing (the “shoe track”). Scenario 1: Production Casing Annulus Cement Barrier and the Wellhead Seal Assembly Under this scenario, hydrocarbons would have flowed from the reservoir up the backside of the tapered casing string, and through the seal assembly into the riser. If this had occurred, the nitrified annular cement intended to isolate the hydrocarbon zone(s) at the production interval would have failed, the casing would have lifted or floated, and the seal assembly would have failed in conjunction with the casing lifting. This potential flow path is illustrated in Figure 6, below. Figure 6...
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This note was uploaded on 01/18/2014 for the course BEPP 305 taught by Professor Nini during the Fall '11 term at UPenn.

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