The article presents the experimental work results of chemical reagents selection the development of an afron-containing drilling fluid composition for the primary gas productive horizon opening with abnormally low reservoir pressures (ALPP). As the world practice has shown, aphron systems of drilling fluids allow at the lowest cost, in comparison with traditional technologies, to solve such problems as: circulation losses, the occurrence of sticking, irreversible clogging and damage to filtration channels by deeply penetrating particles of drilling mud and its filtrate.
The descriptions of aphrons behavior mechanism, the composition and based on aphrons fluids properties, as well as the results of field work on the use of drilling fluids based on aphrons are given.
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