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稠油开采的传统工艺是利用“一次完成式”蒸汽发生器(OTSG)产生高压蒸汽注入到稠油油层。蒸汽冷凝散发出的热量传递给稠油,将油水混合物带回地面。石油和油田伴生水同时被采出,产出液经除油处理后供水给“一次完成式”蒸汽发生器。典型的油田水处理工艺是温石灰或热石灰软化(WLS或HLS)、过滤和弱酸阳离子交换(WAC)法。油田水处理中的往复循环法工艺由垂直管、降膜、压缩蒸汽组成,该方法具有缩短生产周期、降低成本,不会产生任何软化剂污泥等诸多特点。在蒸汽辅助重力驱油工艺中,整装锅炉比“一次完成式”蒸汽发生器便宜,且只有少量排污,使锅炉供水系统规模比“一次完成式”蒸汽发生器小20%。
The traditional process of heavy oil production is the injection of high pressure steam into heavy oil reservoirs using the “one-shot” steam generator (OTSG). The heat from steam condensation is transferred to the heavy oil, bringing the oil-water mixture back to the ground. Petroleum and oilfield associated water is taken out at the same time, and the output fluid is supplied to the “once-complete” steam generator after being degreased. Typical oilfield water treatment processes are warm lime or hot lime softening (WLS or HLS), filtration, and weak acid cation exchange (WAC) processes. The reciprocating cycle process in oilfield water treatment consists of vertical tube, falling film and compressed steam. The method has the characteristics of shortening the production cycle, reducing the cost and not producing any softener sludge. In the steam-assisted gravity-displacement process, a packaged boiler is cheaper than a “one-shot” steam generator with only a small amount of blowdown, making the boiler’s water system 20% smaller than “one-shot” steam generators.