石油化工高等学校学报

石油化工高等学校学报 ›› 2020, Vol. 33 ›› Issue (4): 34-37.DOI: 10.3969/j.issn.1006-396X.2020.04.006

• 石油工程 • 上一篇    下一篇

原油脱气对低渗透油藏有效驱替压差的影响

罗沛1秦正山2罗毓明3谢晶1   

  1. 1.重庆科技学院 石油与天然气工程学院,重庆 401331;2.中石油长庆油田分公司 第六采油厂,陕西 西安 710000; 3.西南油气田分公司,重庆 401331
  • 收稿日期:2019-01-17 修回日期:2019-05-13 出版日期:2020-08-28 发布日期:2020-09-15
  • 通讯作者: 秦正山(1994⁃),男,硕士,从事油气田开发方面研究;E⁃mail:942197804@qq.com。
  • 作者简介:罗沛(1963?),男,博士,教授级高级工程师,从事油气渗流理论与现代试井解释、油气藏动态监测与评价研究;E?mail:cqust?luo@163.com。
  • 基金资助:
    “十三五”国家油气重大专项项目子课题(2017ZX05013001?004)。

Effect of Oil Degassing on Effective Displacement Pressure Difference in Low Permeability Reservoirs

Luo Pei1Qin Zhengshan2Luo Yuming3Xie Jing1   

  1. 1.Petroleum and Natural Gas Engineering College,Chongqing University of Science and Technology,Chongqing 401331,China; 2.Changqing Oilfield Branch Company Oil Production Plant No.6 of PCOC,Xi'an Shaanxi 710000,China; 3.Southwest Oil and Gas Field Company of CNPC,Chongqing 401331,China
  • Received:2019-01-17 Revised:2019-05-13 Published:2020-08-28 Online:2020-09-15

摘要: 地层原油脱气导致渗流阻力增大,严重影响低渗透油藏的开发效果。以卫城某油藏为例,通过稳态法水驱油实验,研究了原油黏度变化对油水两相启动压力梯度的影响,进而研究了启动压力梯度变化对低渗透油藏有效驱替压差的影响。研究表明,地层原油脱气后,随着原油黏度的增大,启动压力梯度增大,导致井间有效驱替压差减小,当注采压差较小时,将难以建立有效驱替;提出了针对这一问题的应对措施。研究成果对于低渗透油藏注采井网设计及后期的治理调整具有指导意义。

关键词: 低渗透油藏, 地层原油脱气, 启动压力梯度, 有效驱替压差

Abstract: The degassing of crude oil in the formation will increase the seepage resistance,which seriously affects the development effect of low permeability reservoirs.This paper takes a low permeability reservoir in Weicheng as an example,using steady state water flooding test method to explore the effect of oil viscosity change on the oil water two⁃phase threshold pressure gradient,and study the effect of threshold pressure gradient on the effective displacement pressure difference in low permeability reservoirs.The results show that the threshold pressure gradient increases with the increase of oil viscosity after oil degassing,which results in the decrease of effective displacement pressure difference between wells.When the injection and production pressure difference is small,it is difficult to establish effective displacement.At the same time, some countermeasures are put forward to deal with this problem.The research results are of guiding significance for the design of injection⁃production well pattern and the later adjustment in low permeability reservoirs.

Key words: Low permeability reservoir, Formation oil degassing, Threshold pressure gradient, Effective displacement pressure difference

引用本文

罗沛, 秦正山, 罗毓明, 谢晶. 原油脱气对低渗透油藏有效驱替压差的影响[J]. 石油化工高等学校学报, 2020, 33(4): 34-37.

Luo Pei, Qin Zhengshan, Luo Yuming, Xie Jing. Effect of Oil Degassing on Effective Displacement Pressure Difference in Low Permeability Reservoirs[J]. Journal of Petrochemical Universities, 2020, 33(4): 34-37.

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