Towards Physico-Chemical Characteristics of Micro Glass Bubble-based Fluids

Abdol Samad Rahmati, Seyed Reza Shadizadeh, Paul F. Luckham

Abstract


One of the most important and controversial issues throughout drilling operations in Iranian Southern Oil Fields is drilling fluid loss. To overcome this problem, an under balance drilling method has been carried out in a few wells. However, controlling damage in the reservoir due to fluid loss has been considered as a critical issue. The aim of this study is to investigate the effect of glass bubbles materials to control fluid losses at drilling fluids used in drilling operations in the Asmari reservoir. As a result, several laboratory experiments were performed on Asmari’s drilling fluids by glass bubbles with 4000 type from the 3M Company. The effects of adding glass bubbles and other materials used in Parsi oil field, Iran, were investigated specifically. The results obtained illustrated that glass bubbles decreases the weight of water-based emulsion fluid from the lightest, which was 55.5 pcf to 43 pcf with no rheological changes in the fluid properties in case of using maximum 40% V/V glass bubbles in the fluid. Effects of different combination of additives were also investigated in this study. Finally, a characteristic plot was drawn for emulsion fluid showing mud weight variation based on the amount of glass bubbles added.

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