文章摘要
含油污泥调剖体系的制备及调剖性能评价
Preparation of oily sludge profile control system and evaluation of profile control performance
投稿时间:2020-04-26  修订日期:2020-07-01
DOI:
中文关键词: 含油污泥  乳化悬浮  调剖  环保
英文关键词: oily sludge  emulsion suspension  profile control  environmental protection
基金项目:国家杰出青年科学基金“提高采收率与油田化学”(项目号51425406),国家重点基础研究发展计划(973计划)“提高致密油储层采收率机理与方法研究”(项目号2015CB250904)。
作者单位E-mail
戴彩丽 中国石油大学华东石油工程学院
山东省油田化学重点实验室 
daicl306@163.com 
徐忠正 中国石油大学华东石油工程学院
山东省油田化学重点实验室 
z18020069@s.upc.edu.cn 
刘佳伟 中国石油大学华东石油工程学院
山东省油田化学重点实验室 
 
孙雯 中国石油大学华东石油工程学院
山东省油田化学重点实验室 
 
陈佳 中国石油大学华东石油工程学院
山东省油田化学重点实验室 
 
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中文摘要:
      对于东风港油田含油污泥开展回注调堵技术研究,针对该地含油污泥含油量较高且不具备除油除水设备条件的情况,本研究不经过除油过程,直接对油泥混合物进行机械筛分研磨、乳化悬浮处理,建立以机械剪切法为主导制备的含油污泥调剖体系。优化后的添加剂为0.2wt%SF+0.2wt%FM-20,常温和90℃下均能悬浮10小时以上,固液比为4~8wt%,剪切转速为6400rpm左右,剪切时间为3min左右。通过注入性能和封堵性能实验对该体系的调剖效果进行了评价,长岩心多点测压试验结果表明体系具有良好的注入性能,在单管岩心注入试验中,注入含油污泥调剖堵剂后,对不同渗透率岩心封堵率达90%以上。通过单管岩心驱油试验完成驱替潜力性能评价,含油污泥调剖后,二次水驱后采收程度提高了25.01%。此方法操作简便、成本低、二次污染少,对含油污泥的处理和资源化利用有良好的应用前景。
英文摘要:
      In this paper, researches on the reinjection and profile control technology of the oily sludge in Dongfenggang Oilfield were conducted. Taking into consideration of the high oil content of oily sludge and a lack of oil and water removal facilities in that specific oilfield, the oily sludge mixture was directly subjected to mechanical sieving and grinding, emulsification and suspension treatment without preliminary oil-removing process. An oily sludge profile control system prepared mainly by mechanical shearing method was established. The optimized additive was FM-20. With the 0.2wt%SF+0.2wt%FM-20, the oily sludge mixture could be suspended for more than 10 hours at both room and formation temperature. The solid-liquid ratio was 4-8 wt%, the shear speed was about 6400rpm, and the shear time was about 3min. The profile control effect of the system was evaluated through the injection and plugging tests. The multi-point pressure test of the long sand-pack showed that the system had good injection performance. The plugging rate of oily sludge agent to cores with different permeability reached over 90%. The displacement potential was evaluated through a sand-pack flooding test. It was found that after the profile control of oily sludge system, the secondary water flooding recovery increased by 25.01%. This method had the advantages of simple operation, low cost and reduced secondary pollution, exhibiting excellent application prospects for the treatment and resource utilization of oily sludge.
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