文献类型：期刊文献

英文题名：Treatment of the complex liquid phase that contains produced water, condensate oil, and floccule from an offshore gas field: A pilot system for the South China Sea

作者：Liu, Yiqian[1];Lu, Hao[1];Liu, Peng[2];Li, Yudong[1];Wu, Shihan[1];Dai, Pinyi[1];Yang, Qiang[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]China Natl Offshore Oil Corp Zhanjiang Ltd, Beijing, Peoples R China

年份：2021

卷号：94

外文期刊名：JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING

收录：;EI(收录号：20212910654293);WOS:【SCI-EXPANDED(收录号:WOS:000679390300005)】；

基金：This work was supported by the National Key Research and Devel-opment Project (2019YFC1906703, 2019YFA0705800) and the Na-tional Natural Science Foundation of China (52025103) .

语种：英文

外文关键词：Offshore gas fields; Pilot system; Separability determination; Liquid phase purification; Organic compounds analysis

摘要：Produced water (PW) of the liquid phase is the largest volume by-product from the process of offshore oil and gas production, and compact and efficient treatment methods are brought into focus. The PW, condensate oil, and floccule in the liquid phase all require treatment to satisfy the requirements of the standards. The liquid phase volume from offshore gas fields is typically not as large as that from offshore oil fields. The presence of the floccule and severity of emulsification, however, cause higher levels of treatment difficulty. Ecological damage to the ocean and some other potential hazards can be caused if PW discharged into the ocean contains oil that exceeds the concentrations of the value, of which ranges from 15 mg/L to 50 mg/L according to different standards. Condensate oil phase pipes may also be corroded if the oil phase is not well treated. This study examines a pilot system with the capacity of 0.5 m3/h, that includes pre-, PW, and condensate oil treatments performed at an industrial offshore gas field platform on the South China Sea. The water and oil phases were transparent in appearance. The concentration of oil in the PW discharged to the ocean was less than 50% of the value of the relative standards. The concentration of water in the condensate oil was lower than 200 mg/L, which satisfied the requirement of this platform for transportation by submarine pipelines. The accumulative floccule in the liquid phase was also gathered using a filter bag that proceeded a virtuous circle due to the avoidance of the accumulation of the floccule. This pilot system provides a novel solution method for the liquid phase from offshore gas fields containing highly emulsified PW, condensate oil, and floccule, which diffuses between the PW and the condensate oil.