Journal of Petrochemical Universities

Journal of Petrochemical Universities ›› 2017, Vol. 30 ›› Issue (5): 60-65.DOI: 10.3969/j.issn.1006-396X.2017.05.012

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The Study on Technical Limits for Interlayer Channeling of InjectionProduction Well Area

  

  1. (College of Petroleum Engineering, Northeast Petroleum University,Daqing Heilongjiang 163318,China)
  • Received:2017-03-10 Revised:2017-03-27 Online:2017-10-31 Published:2017-11-10

同井注采井区隔层窜流界限研究

张继成,郑灵芸   

  1. (东北石油大学石油工程学院,黑龙江大庆163318)
  • 作者简介:张继成(1972-),男,博士,教授,博士生导师,从事石油与天然气工程方面的研究;E-mail:zhangjc777@163.com。
  • 基金资助:
    “十三五”国家科技重大专项课题“海上稠油油田开发模式研究”(2016ZX05025-001)。

Abstract: Downhole oilwater separation technology can make production liquid divide into water and oil, reduce the surface water treatment and improve oil displacement efficiency. However, pressure difference between output layer and injection layer increases after implementation of this technology. When pressure difference is greater than threshold pressure gradient of interlayer, the interlayer fluid flows. In order to prevent the occurrence of interlayer channeling, numerical model of injectionproduction well is established according to actual formation parameters. After studying the injection and production technology of the same well, the range of cross flow and the upper limit of daily production of single well are obtained, and the limit chart of permeability, thickness and single well production is obtained. When daily production volume of single well is 70 m3 and interlayer permeability is 1×10-3 μm2, the lower limit of interlayer thickness is 2.3 m; When daily production volume of single well is 70 m3 and interlayer thickness is 3 m, the upper limit of interlayer permeability is 1.25×10-3 μm2. When the physical parameters of interlayer are changed, daily production volume of single well can be determined according to the plate, which can be used to guide the development of oilfield development plan.

Key words: Injectionproduction well,    ,  Interlayer channeling,    , Threshold pressure gradient,    , Numerical simulation

摘要: 井下油水分离技术可使产出液在地下实现油水分离,达到减少地面水处理量,提高驱油效率的目的。但实施此项技术之后,同井注采井区回注层与产出层之间的压差增大,当二者之间压差大于隔层启动压力梯度时, 隔层流体发生窜流。为防止隔层流体发生窜流,根据A油田实际地层参数,建立同井注采模型,研究实施同井注采技术之后隔层发生窜流的范围及单井日产液量的上限值,得到隔层渗透率-厚度-单井日产液量界限图版。分析图版可知,当前A油田同井注采井单井日产液量为70m3 条件下,隔层渗透率为1×10-10-3μm2时,隔层厚度下限值为2.3 m;隔层厚度为3m 时,隔层渗透率上限值为1.25×10-3μm2。在隔层物性参数变化时,可根据图版确定同井注采井合理的单井日产液量,对油田开发方案的制定具有一定的指导意义。

关键词: 同井注采,    ,  隔层窜流,    ,  启动压力梯度,    ,  数值模拟

Cite this article

Zhang Jicheng, Zheng Lingyun. The Study on Technical Limits for Interlayer Channeling of InjectionProduction Well Area[J]. Journal of Petrochemical Universities, 2017, 30(5): 60-65.

张继成,郑灵芸. 同井注采井区隔层窜流界限研究[J]. 石油化工高等学校学报, 2017, 30(5): 60-65.