Reduction of the Probability of Occurrence of Differential Pressure Sticking Through the Use of Diesel on Water Based Drilling Fluids

  • David Esteban Almeida Campana Petroamazonas EP
  • Marco Loaiza Escuela Politécnica Nacional
  • Raul Valencia Escuela Politécnica Nacional
Keywords: differential sticking, diesel, bow tie, risk

Abstract

The drilling campaign on Pad C of the Tiputini Field, located on the Oriente Basin, Ecuador, started with the first exploratory well TPTC-002. Pressure tests performed on the M1 sandstone of the Napo Formation determined that the average reservoir pressure (Pr) was 1921 psi. Ten months later, Pr averaged 846 psi. This increased the risk of differential pressure sticking, event that indeed occurred while drilling the well TPTC-016. By using the “Bow-Tie” methodology as a predictive tool to analyze risks, and taking into account the preliminary studies that describe this phenomena, a solution was found for stablishing an additional barrier with the use of diesel on the water-based drilling fluid. Diesel was used in order to extend the ‘half value time’ and to decrease the friction coefficient between the mud cake and pipe.

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References

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Published
2019-03-29
How to Cite
Almeida Campana, D., Loaiza, M., & Valencia, R. (2019). Reduction of the Probability of Occurrence of Differential Pressure Sticking Through the Use of Diesel on Water Based Drilling Fluids. Enfoque UTE, 10(1), pp. 77 - 88. https://doi.org/https://doi.org/10.29019/enfoqueute.v10n1.366
Section
General Engineering