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Unformatted text preview: mud up from the 33 Additives are used to tailor the cement to the needs of a well. For example, a weighting material might be added to a cement slurry when a higher density cement is needed. 34 A positive pressure test is conducted by pumping fluid into the well after sealing the blind shear rams. The rig crew monitors the well to determine whether pressures in the well remain static. 35 A negative pressure test seeks to create conditions that simulate what will occur when the well is abandoned. The rig crew displaces drilling mud with other fluids, resulting in the wellbore being underbalanced against the formation pressures. The rig crew then monitors pressures and flow to determine the integrity of the barrier being tested. 36 BP‐HZN‐MBI‐00129108. Each of these steps is discussed in detail in Section I of the findings and conclusions in this Report. 37 Fluid includes any fluid (mud, spacer, seawater) coming out of the well or across the rig. 38 BP –HZN‐MBI‐00021237. 39 BP‐HZN‐MBI‐00136947. 21 well, and pumped the recovered mud onto the Damon Bankston, a vessel working alongside the Deepwater Horizon at...
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