Whenthebottomplugreachesthetopofthefloatcollar

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Unformatted text preview: o the well. According to IADC daily reports, the well experienced mud losses of approximately 3,000 bbls across the hydrocarbon zones of interest during the drilling of the production casing open‐hole section. The crew controlled these losses with the addition of lost circulation material (“LCM”) pills and a relatively small quantity (less than 200 bbls) of a special blend of drilling fluid, which help retard the loss of mud into fractures and highly permeable formations. From the time the Deepwater Horizon moved onto location at Macondo, a total of Id. 73 33 approximately 15,500 bbls of drilling fluids were lost during drilling, running casing and cementing operations. 74 F. Well Ballooning Well ballooning is a common phenomenon in which the formation absorbs drilling mud while the rig’s pumps are activated and then releases the mud back into the well when the pumps are not active. Well ballooning is significant because it can mimic a kick. Rig crews can therefore miss critical kick indicators if they mistakenly believe th...
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