石油学报 ›› 2012, Vol. 33 ›› Issue (1): 112-116.DOI: 10.7623/syxb201201015

• 油田开发 • 上一篇    下一篇

层状油藏重力渗流机理及其应用

贾红兵   

  1. 大庆油田有限责任公司勘探开发研究院 黑龙江大庆 163712
  • 收稿日期:2011-10-14 修回日期:2011-12-15 出版日期:2012-01-25 发布日期:2012-03-22
  • 通讯作者: 贾红兵
  • 作者简介:贾红兵,男,1980年5月生,2006年获大庆石油学院油气田开发工程硕士学位,现为大庆油田勘探开发研究院工程师,主要从事油藏工程方面的研究工作。
  • 基金资助:

    中国石油天然气股份有限公司项目“大庆低渗透油藏有效开发技术应用基础研究”(2008B-0903)资助。

Gravity percolation mechanism of layered reservoirs and its application

JIA Hongbing   

  • Received:2011-10-14 Revised:2011-12-15 Online:2012-01-25 Published:2012-03-22

摘要:

通过建立层状油藏重力渗流数学模型和机理模型,研究了重力渗流机理。结果表明,重力驱动产量与地层渗透率、有效厚度、地层液体密度、地层倾角正弦值的平方成正比,与地层液体黏度成反比;重力渗流主要发生在与地层倾向成60°以内的区域,夹角越大,渗流越弱。机理模型研究结果表明:当地层渗透率超过10 mD、地层倾角超过5°时,水相重力渗流明显增强,注入水向低部位突进严重,须优化注水方式,以改善这类油藏开发效果。在海拉尔盆地典型断块的应用结果表明,研究成果既可以用于重力能量评价,也可用于注水方式优化。

关键词: 重力渗流机理, 地层倾角, 渗透率, 注水方式, 层状油藏

Abstract:

The gravity percolation mechanism was studied by establishing gravity percolation models including the mathematical model and mechanism model of layered reservoirs. The results show that the production by gravity drive is directly proportional to the permeability, reservoir thickness, fluid density of strata and the square of sine value of stratum dip, but inversely proportional to the fluid viscosity of strata. Gravity percolation occurs mainly in an area where the included angle to stratum dip is under 60°. Moreover,the bigger the angle,the weaker the percolation. The mechanism model indicates that the gravity percolation of water phase becomes obviously strong when the permeability is greater than 10 mD and stratum dip exceeds 5°. The injected water intrudes severely to a low position, so the water injection mode must be optimized to improve the development effect of such kind of reservoir. The practical application to typical fault blocks of the Hailar Basin showed that this approach could be used to both evaluate gravity energy and optimize water injection modes.

Key words: gravity percolation mechanism, stratum dip, permeability, water injection mode;layered reservoirs