Abstract
Abstract In view of the lack of equipment for direct detection of ion content in formation water under high temperature and high pressure conditions at domestic and overseas until now. In this paper, a static experiment was designed to test the solubility of each ion in the fluid under high temperature and high pressure conditions. The influence of different temperature and pressure on the solubility of scaling was tested by experiments, and the variation rule of the scaling solubility under high temperature and high pressure was comprehensively studied. The results show that: With the increase of temperature, the solubility of barium sulfate in pure water increases first and then decreases; the solubility of strontium sulfate decreases gradually; the solubility of magnesium carbonate increases first and then decreases; the solubility of magnesium carbonate increases first and then decreases; the solubility of calcium carbonate increases first, then decreases and then increases; at the same temperature and pressure, the solubility of four scalings that are barium sulfate, calcium carbonate, strontium sulfate and magnesium carbonate is in the size order of BaSO4<CaCO3<SrSO4<MgCO3.
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