油气藏评价与开发 ›› 2019, Vol. 9 ›› Issue (6): 24-29.

• 油气藏评价 • 上一篇    下一篇

流线影响因素分析及其在断块油藏开发调整中的应用

刘家军1,金忠康1,蔡新明2   

  1. 1. 中国石化江苏油田分公司采油二厂,江苏金湖 211600
    2. 中国石化江苏油田分公司勘探开发研究院,江苏扬州 225000
  • 收稿日期:2019-09-23 出版日期:2019-12-26 发布日期:2019-12-30
  • 作者简介:刘家军(1968 —),男,本科,高级工程师,从事油田开发研究工作。通讯地址:江苏省金湖县江苏油田分公司采油二厂,邮政编码:211600。E-mail:liujj.jsyt@sinopec.com

Streamline influencing factor analysis and its application of streamline adjustment in fault block oil reservoir

Jiajun LIU1,Zhongkang JIN1,Xinming CAI2   

  1. 1. No. 2 Oil Production Plant, Sinopec Jiangsu Oilfield Company, Jinhu, Jiangsu 211600, China
    2. Research Institute of Exploration and Production, Sinopec Jiangsu Oilfield Company, Yangzhou, Jiangsu 225000, China
  • Received:2019-09-23 Online:2019-12-26 Published:2019-12-30

摘要:

断块油藏地质条件复杂,小断层发育,储层非均质严重,开发进入特高含水开发期,剩余油高度分散,注采井间流线固定,水驱效率变差,水驱波及难以进一步扩大。改变流线已成为低油价下断块油藏降本增效的重要手段,常规的动态分析不适应高含水断块油藏的调整。应用流线模拟方法分析了各因素对水驱流线的影响,利用灰色关联法计算了各因素的影响程度。纵向非均质、平面非均质、注采井网对流线的影响显著,注采井距、注采压差等因素对水驱流线的影响相对较小,将流线分布模式分为流线密集区、流线稀疏区、流线空白区,并形成了基于流线的优化调整技术。在苏北盆地多个断块油藏开展了矢量调配、增新水线、抽稀井网、细分重组的调整,取得较好效果,对同类型油藏调整有一定的指导意义。

关键词: 流线, 剩余油分布, 调整优化, 均衡驱替, 细分重组

Abstract:

The geological conditions of fault block reservoirs are complex, whose small faults are developed, and reservoir heterogeneity is serious. When the reservoir enters the development stage with ultra-high water cut, the remaining oil is highly dispersed, the streamline between injection and production wells is fixed, the benefit of water drive becomes worse, and the spread of water flooding is difficult to further expand. Streamline adjustment and development have become the main direction of cost reduction and efficiency enhancement for fault block reservoirs when the price of oil is low. Conventional dynamic analysis is not suitable for the adjustment of high water cut fault block reservoirs. In this paper, streamline simulation method is used to analyze the influence of each factor on the streamline of water flooding, and grey relational method is used to calculate the influence degree of each factor. It is found that vertically heterogeneity, areal heterogeneity and injection-production well pattern have significant influences on streamline, while injection-production well spacing and injection-production pressure difference have relatively small influences. The streamline distribution model is divided into three categories: dense area, sparse area and blank area, on this basis, the optimal adjustment technology is formed. In several fault block reservoirs in Subei Basin, the adjustments of vector allocation, adding new waterline, reducing the number of wells in the well pattern, and reorganization after subdivision have been carried out. Remarkable effect of increasing oil production and efficiency has been achieved. It has certain guiding significance for the adjustment of the same type of reservoirs.

Key words: streamline, remaining oil distribution, optimization, equilibrium flooding, reorganization after subdivision

中图分类号: 

  • TE319