While drilling in Northern Monagas Basin, high pressures are encountered in the Naricual formation. In an effort to control these pressures, the Naricual formation is typically drilled in multiple sections, including the 8 ½” and 6 ½” sections. Typically, the pressure differential requires a complex drilling fluid design.
FLC 2000® was used to drill between the Naricual formation, and the low pressure, consolidated sands San Juan formation. Electrical logging confirmed a differential pressure of more than 7,000 psi. The liner hanger of 5 ½” sits with 3,500 psi while inducing an equivalent density of 14.4 LPG at the bottom. The section was drilled successfully with no fluid loss.
The Naricual formation was drilled in one section (8 ½”), eliminating the 6 ½” section originally planned. FLC 2000 performed at high differential pressure eliminating the need to drill the addition section, saving the operator in drilling cost.
Formation damage studies from core analysis also demonstrated a reduction of 93% when using FLC 2000 compared to a drilling fluid without the technology.