西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (2): 172-178.DOI: 10.11885/j.issn.1674-5086.2015.05.19.04

• 石油机械与油田化学 • 上一篇    下一篇

生产参数对沥青质井筒析出影响规律研究

吴川1, 张汝生1, 张祖国1, 佘跃惠2, 吴正彬3   

  1. 1. 中国石化石油勘探开发研究院, 北京 海淀 100083;
    2. 长江大学化学与环境工程学院, 湖北 荆州 434023;
    3. 中国石油大学(北京)石油工程学院, 北京 昌平 102249
  • 收稿日期:2015-05-19 出版日期:2017-04-01 发布日期:2017-04-01
  • 作者简介:吴川,1983年生,男,汉族,湖北仙桃人,高级工程师,博士,主要从事采油工程与工艺方面的研究。E-mail:wciwlf@tom.com;张汝生,1970年生,男,汉族,四川大邑人,高级工程师,硕士,主要从事压裂酸化技术研究工作。Email:zhangrsh.syky@sinopec.com;张祖国,1966年生,男,汉族,湖北天门人,教授级高级工程师,主要从事采油工程与工艺方面的研究。E-mail:zhangzg.syky@sinopec.com;佘跃惠,1965年生,男,汉族,湖南邵东人,研究员,博士,主要从事油田化学方面研究。E-mail:sheyuehui@163.com;吴正彬,1991年生,男,汉族,湖北仙桃人,博士,主要从事稠油热采方面的研究工作。E-mail:wuzhengbincup@126.com
  • 基金资助:
    国家科技重大专项(2011ZX05031003004);中国石化科技部攻关项目(P15128);中国石化重大科技项目(ZDP17005)

Influence of Production Parameters on Asphaltene Precipitation Regularity in Wellbore

WU Chuan1, ZHANG Rusheng1, ZHANG Zuguo1, SHE Yuehui2, WU Zhengbin3   

  1. 1. Petroleum Exploration and Production Research Institute, SINOPEC, Haidian, Beijing 100083, China;
    2. College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, Hubei 434023, China;
    3. College of Petroleum Engineering, China University of Petmleum(Beijing), Changping, Beijing 102249, China
  • Received:2015-05-19 Online:2017-04-01 Published:2017-04-01
  • Contact: 吴川,E-mail:wciwlf@126.com

摘要: 针对油田沥青质井筒沉积问题,开展了生产参数对沥青质井筒析出影响规律研究,研究中采用了压差法,高温高压条件下测定温度、油气比、流速等对沥青质析出压力与再溶解的临界压力的变化规律。研究结果表明,沥青质析出压力(ponset)与温度成反比,而沥青质再溶解的临界压力(pred)与温度成正比;温度一定,沥青质析出压力(ponset)随着油气比增大而增大,即原油中溶解气体量大,沥青质沉积的趋势增大;油气比和温度一定时,流速变化对沥青质的析出压力和再溶解压力几乎没有影响。

关键词: 沥青质, 析出规律, 温度, 油气比, 流速

Abstract: This study investigated the influence of production parameters on asphaltene precipitation regularity under the conditions of high temperature and high pressure and evaluated the influence of temperature, GOR (gas-oil ratio), and flow velocity on asphaltene precipitation in wellbores. The results showed that the pressure of asphaltene precipitation (ponset) was inverse to temperature and the pressure of asphaltene redissolving (pred) was proportionate to temperature. ponset was proportionate to the GOR at a certain temperature because the dissolved gases in the oil increased when the GOR improved and may have caused asphaltene precipitation. ponset and pred were not influenced by flow velocity in certain GOR and temperature ranges. This study demonstrated how asphaltene precipitation regularity can be controlled to decrease the risk of asphaltene precipitation in wellbores.

Key words: asphaltene, precipitation regularity, temperature, GOR, flow velocity

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