| 摘要 |
The present invention relates to a high-performance aqueous-phase polymer fluid which is a seawater-based drilling fluid for drilling wellbores in shallow formations, formulated from liquid-state polymer chemical products that are easily aggregated and quickly mixed, prepared and homogenised, minimising the preparation time thereof. The fluid is designed for drilling into hydrocarbon-producing reservoirs, with an emphasis on minimising damage to producing formations, with a high rate of circulation loss in naturally fractured reservoirs. The system is environmentally friendly, fulfills the main functions required of drilling fluids, and provides excellent control over inhibition of swelling and dispersion of clay areas, owing to the polymer nature of the materials with which said fluid is formulated. The fluid contains no solids in its formulation, and is very effective at cleaning the wellbore of drilled cuttings and transporting said cuttings. |
