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Volume 06,Issue 01
   Volume & Issue: Volume 06,Issue 01



Development and Performance Appraisal of a New Flat Rheology Drilling Fluid System for Drilling Deep Water HPHT Reservoir

  Volume 06,Issue 01

 

Author :

Mamidi Lokesh Teja, P. K. Mahata

 

Abstract :

Drilling fluid performs many functions in a drilling process, including the removal of cuttings, lubricating and cooling the drill bits, providing the stability of the hole and preventing the inflow-outflow of fluids between the borehole and the formation. Conventional drilling fluids experience a number of deteriorations such as gelation, degradation of weighting materials and breakdown of polymeric additives under HPHT conditions. Flat rheology profile minimizes adverse effects on ECD, lost circulation, barite sag and hole cleaning activity. This paper highlights the performance of flat rheology drilling fluid systems and their rheology modifiers with special emphasis on water-based mud systems in deep water HPHT reservoirs. Various rheological parameters are experimentally evaluated and the results indicate the constant rheological profile over a wide range of temperatures and pressures. On the basis of the study following drilling fluid system is recommended: New Nanomaterials, KCl-Glycol, low-solids, non-dispersed (LSND) polymer systems(Poly Styrene-co-Butadiene), Glycol-polymer, and Mixture of barite and Manganese Tetra Oxide, TiO2 Nanofluids, Polyol based drilling Fluid system in Water-Based drilling fluid system to provide stable rheology and fluid loss for designing an HPHT tolerant Water-Based mud with an eco-friendly formulation. The newly engineered drilling fluid system exhibits constant flat rheology even in a deepwater environment, has demonstrated promising performance characteristics in field trail.

 

Keywords :

Deep water, High Pressure High Temperature, Flat Rheology, Equivalent Circulating Density (ECD), Barite sag.

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