Schlumberger

Tech Report: PRIMO-FAZE Nonaqueous RDF System Solves Filtercake Cleanup Concerns, Offshore Norway

Reversible reservoir drill-in fluid system functions as oil-base drilling fluid with cleanup capabilities of a water-base fluid in horizontal well

PRIMO-FAZE Nonaqueous RDF System Solves Filtercake Cleanup Concerns, Offshore Norway

Publication Date: 06/13/2017

Because of the estimated density requisite, filtercake cleanup was a major concern for an operator planning to drill and complete a horizontal well in the Norwegian sector of the North Sea. M-I SWACO recommended the PRIMO-FAZ low-oil/water-ratio reversible nonaqueous reservoir drill-in fluid (RDF) system and the PRIMO-MUL low-oil/water-ratio RDF emulsifier. The drilling fluid system performance exceeded overall KPI expectations set by the operator.

The PRIMO-FAZE system was designed and modeled for drilling the well with a mud weight range between 11.5 and 12.5 lbm/galUS [1,378 and 1,498 kg/m3] depending on formation pressures. M-I SWACO performed extensive tests simulating drilling conditions, including filtercake cleanup tests, and confirmed the ease of cleanup with the system while ensuring minimal reservoir damage.




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