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注水采油是国内外油气田普遍采用以提高采收率的主要措施。对油田进行注水,可弥补原油采出后所造成的地下亏空,保持或提高油层压力。油田注入水,除要求水量充足,经济合理外,还必须满足水质稳定、不携带大量悬浮物、对注水设施腐蚀性小、对油层无伤害等水质特点。油田现场水样水质分析表明,注入水水质呈弱碱性(pH值为7.5),具有高矿化度、总铁含量高、SS含量高的特点,利用油田现场的过滤介质,对处理后注入水进行了,水质检测结果表明,注入水SS为3mg/L,总铁为0.5mg/L,达到花土沟油田采出水回注水质标准要求。
Water injection is the main method adopted by oil and gas fields both at home and abroad to enhance oil recovery. Waterflooding the oilfield can make up for the underground deficit caused by the recovery of crude oil and maintain or increase the pressure of the oil layer. Oilfield injection of water, in addition to requiring adequate water, economic and reasonable, but also to meet the water quality and stability, do not carry a large amount of suspended solids, corrosion of water injection facilities is small, no harm to the reservoir water quality characteristics. Oilfield water quality analysis showed that the quality of injected water was weak alkaline (pH value of 7.5), with high salinity, high total iron content, high SS content characteristics of the field using the filter media, injection after treatment Water was tested. The results of water quality test showed that SS of infused water was 3 mg / L and total iron was 0.5 mg / L, which met the water quality standard of reclaimed water from Huatugou Oilfield.