Many wells leak liquid or gaseous hydrocarbons or have sustained casing pressure (SCP). Managing leakage has been an enduring challenge, and related regulations are expected to become increasingly stringent over the coming years. Improving slurry designs and optimizing fluid placement help to prevent leaks, but once cement has set, it is vulnerable to hydrocarbon migration in the event of sheath damage. Schlumberger has developed an isolation solution based on a responsive cement blend with intrinsic self-healing properties. FUTUR active-set cement technology is automatically activated upon contact with hydrocarbons, improving long-term zonal isolation and protecting against hydrocarbon leaks and SCP at the wellhead. Pumped and placed as part of any primary cementing operation, FUTUR creates a cement sheath that provides an additional level of protection above the reservoir, reacting whenever the cement sheath is damaged during the long-term productive life of the well.
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