Influencia de las concentraciones de goma xantano, hidroxipropil almidón y cloruro de potasio sobre las propiedades de flujo de las formulaciones de fluidos de perforación

Bruna F Alves,Carla M.F Silva,Elizabete F Lucas,Vera L.C Da Lapa

doi:10.18273/revfue.v17n2-2019007

Abstract

Drilling operation of oil wells involves high costs and risks. With recent discoveries of deeper reservoirs and difficult to access, there was an increase in the number of horizontal wells drilled and far-reaching, and, thereat, new challenges with operational problems. Fluids, or muds, drilling are essential to the well drilling process, confirming the need to study and find physical, rheological, and filtration properties, appropriate to the complexities in each section and the drilling stage. Optimized formulation is the one that comprises a safe operation, mitigation of operational problems, environmental protection, low cost, and high productivity. Thus, this paper offers the study of the rheological properties, and determination of filtrate volume, of the aqueous base fluid formulations, developed with polymeric additives. A high performance formulation, presenting technical-economical feasibility for drilling operations, was achieved using 0.43% m/v of viscosifier (xanthan gun), 0.57% m/v of filtrate controller (hydroxypropyl starch) and 4.57% m/v of clay swelling inhibitor (KCl)

Highlights

An effective drilling fluid is a key factor for a successful drilling operation
The results obtained will be referenced to the values accepted as optimal for the properties of the fluids, namely: apparent viscosity ≥ 15.0 cP; plastic viscosity ≥ 4,0 cP; yield point ≤ 15x μp (N/ m2); filtrate volume ≤ 14 mL or 16 mL; gel strengths - Gi of 3 to 12 lbf/100ft[2] and Gf of 8 to 20 lbf/100ft[2] (API SPEC 13A, 1993)
The results for the LA formulations indicated that the increase in the concentration of xanthan gum (XG) led to values of Gf, μa and μp within the limits of the standard, the values of Gi exceeded the limit required of a fluid with good performance

Summary

Introduction

An effective drilling fluid is a key factor for a successful drilling operation. The fluid is pumped down the drilling column to the drill bit and returns though the annular space carrying cuttings to the surface, where they are removed by a separator so that the fluid can be recirculated in the borehole (Vryzas & Kelessidis, 2017). Influence of the concentrations of xanthan gum, hydroxypropyl starch and potassium chloride on the flow properties of drilling fluid formulations .

Results

Conclusion