Pemex controls lost circulation in South Mexico

A reactive, water-based, lost-circulation material (LCM), used by Pemex Exploration-Production Co. in South Mexico, can effectively control lost circulation in a single treatment.In addition to eliminating lost circulation problems in the Rio Nuevo, Sen, and Fortuna Nacional fields, this system helped Pemex Exploration-Production Oil Co. to rescue a Rio Nuevo well from abandonment, saving about $750,000 in well costs.The LCM treatment, consisting of a blend of clays, polymers, buffers, crosslink, and dispersants, can be used to stop losses of drilling and completion fluids. In addition, it can help increase and restore the integrity of weak formations, extend casing shoe points, and elimi...

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