Abstract
In this paper, several ultrafine particles were prepared and characterized, then the performance of drilling fluids were evaluated after ultrafine particles were added in water base drilling fluids. The viscosity property of drilling fluids were increased, however, filtration reduction could not be strictly controlled. All filtration volume was difficult to control just like common ultrafine calcium carbonate unless some polymers could be used. Titanium dioxide and zinc dioxide could be used as substitutes of calcium carbonate in drilling fluids.
Highlights
In order to provide various essential functions of oil/gas drilling fluids, a few kinds of nano materials are applied in typical formula of drilling fluids
Filtrate volume could not be strictly controlled because all the filtration volume was larger than that of base mud and all filtrate cakes were thicker
When calcium carbonate is not capable to increase the weight of drilling fluid, titanium dioxide and zinc dioxide could be the alternative due to their larger densities than that of calcium carbonate
Summary
In order to provide various essential functions of oil/gas drilling fluids, a few kinds of nano materials are applied in typical formula of drilling fluids. In order to provide various functions, many kinds of materials (such as water, oil, clay, etc.) and agents (such as shale inhibitors, viscosity reducers, flocculants, filtration reducers, etc.) are applied in typical formula of drilling fluids. The most widely used technology is membrane formation technique[1,2,3], in which the most useful functional matter called temporary bridging agent should be applied. These agents are nano and micro particles. Drilling fluids, especially water base drilling fluids, are usually considered as colloid system when we analyze its performance of hydration and electricity[4,5]
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