Influence of carbonic acid ammonium salts on the filtration properties of bottom-hole formation zone

  • Viktoriya Dmytrenko Полтавський національний технічний університет імені Юрія Кондратюка
Keywords: intensification; carbon dioxide; ammonium carbonate; ammonium bicarbonate; ammonium carbonate salts; natural gas; reservoir water; oil recovery

Abstract

The possibility of  using ammonium carbonates for increase hydrocarbons extraction  is considered. Experimental studies have been carried out to study the effect of ammonium carbonate salts on the reservoir filtration properties. It has been established that carbon dioxide ammonium salts, in the absence of calcium chloride water, interact with carbonate rocks, increase the absolute permeability of reservoirs. Solutions of ammonium carbonate salts interact with potassium chloride and form chemically precipitated chalk in the pores of the rock. Аt the same time, the permeability of carbonate rocks decreases.

Industrial tests of ammonium carbonate salts showed an increase in gas flow rate by 30-50% at wells № 23 of Oposhnyansky, № 115 of Mashevsky, № 3 of Timofeyevsky gas condensate fields. The effect of the formation treatment with carbonic ammonium salts is conditioned by the purification of the reservoir catchment zone and an increase in the collector absolute permeability. In wells number 56, 108 Yablunivsky and 58 Timofeevsky gas condensate deposits, an increase in the condensation factor observed at 22-35%. The efficiency of the treatment is related to the simultaneous cleaning of the gravel zone from asphalt-resinous contaminants and to the absolute permeability increase, as well as to the pore space hydrophilization and the increase in condensate the mobility that has fallen as a result of its action on carbon dioxide, which was isolated as a result of decomposition of carbonic salts ammonium. So pilot tests at Oposhnyansky, Mashevsky, Timofeevsky, Yablunovsky gas and condensate fields of the Poltava region confirmed the effectiveness of using ammonium carbonate salts to increase hydrocarbon production.

The prospect of further research is aimed at developing a technology for increasing the liquid hydrocarbons production through the use of carbon monoxide salts.

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Published
2019-03-29
How to Cite
Dmytrenko, V. (2019). Influence of carbonic acid ammonium salts on the filtration properties of bottom-hole formation zone. Prospecting and Development of Oil and Gas Fields, (1(70), 70-76. https://doi.org/10.31471/1993-9973-2019-1(70)-70-76