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Experiments were conducted at a range of temperatures (80 to 170°C) and at vapor pressure at 80°C to 3000 psi at 170°C to review the impact of temperature (and pressure) on three dissolvers. This paper shows that at elevated temperature the classic alkali sulphate dissolver (DTPA) dissolution performance declines significantly at 170°C.
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Scale is an adherent deposit of inorganic compounds precipitated from water onto surfaces. Most oilfield waters contain certain amounts of dissolved calcium, barium or strontium salts. The mineral scale can be formed by chemical reactions in the formation water itself, by mixing of formation water with injected seawater, or by mixing of the well streams of two incompatible oilfield waters. In carbonate reservoirs, when calcium is deposited as calcium sulfate or calcium carbonate scale, a loss of production and increased maintenance expenses can result. Therefore, effective mitigation of scaling potential is of importance to the oil producers.
The reverse osmosis (RO) membrane fouling is a significant challenge faced by oil and gas plants, impacting their operational efficiency and overall productivity. The primary cause of RO membrane fouling in oil and gas plants can be attributed to the presence of various foulants, including suspended solids, organic matter, scaling minerals, and biological agents. Among these foulants, microbial activity plays a significant role in accelerating membrane fouling.