石油学报 ›› 2009, Vol. 30 ›› Issue (1): 88-91.DOI: 10.7623/syxb200901018

• 油田开发 • 上一篇    下一篇

底水凝析气藏薄油环开采数值模拟方法研究

张勇1,2, 杜志敏2, 郭肖2, 汤勇2, 阳建平3, 陈文龙3, 常志强3   

  1. 1. 成都理工大学博士后流动站, 四川成都, 610059;
    2. 西南石油大学"油气藏地质及开发工程"国家重点实验室, 四川成都, 610500;
    3. 中国石油塔里木油田分公司勘探开发研究院, 新疆库尔勒, 841000
  • 收稿日期:2008-03-03 修回日期:2008-06-30 出版日期:2008-11-25 发布日期:2010-05-21
  • 作者简介:张勇,男,1976年6月生,2006年获西南石油大学油气田开发工程专业博士学位,现为成都理工大学在站博士后,主要从事复杂油气藏数值模拟及开发动态分析方法研究.E-mail:zhangyongsc@126.com
  • 基金资助:

    国家自然科学基金项目(No.50774062)资助

Numerical simulation method for thin oil ring in condensate gas reservoir with bottom water

ZHANG Yong1,2, DU Zhimin2, GUO Xiao2, TANG Yong2, YANG Jianping3, CHEN Wenlong3, CHANG Zhiqiang3   

  1. 1. Postdoctoral Work Station, Chengdu University of Technology, Chengdu 610059, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
    3. Exploration and Exploitation Research Institute, PetroChina Tarim Oilfield Company, Korla 841000, China
  • Received:2008-03-03 Revised:2008-06-30 Online:2008-11-25 Published:2010-05-21

摘要:

分析了薄油环分布特征及现有油藏模拟网格技术特点,引入顺层网格和水平网格,论述了混合网格建模方法。利用顺层网格描述气藏分布,用水平网格描述油环分布,并将两种网格有效地耦合到一个网格系统中。混合网格模型中顺层网格在油气界面处为水平尖灭,与水平网格重合,实现在几何形状上的耦合。采用非相邻网格传导系数模型计算从水平网格向顺层网格间的流体流动传导系数,实现流体流动的耦合。混合网格建立方法可以有效地避免顺层网格呈锯齿状描述油环的分布特点,减少描述油环分布的网格数量,提高数值模拟计算效率;也可有效地模拟薄油环开采动态特征及底水锥进薄油环动态过程,模拟结果更加合理。

关键词: 凝析气藏, 薄油环分布, 顺层网格, 水平网格, 混合网格, 数值模拟

Abstract:

The conventional grid method is difficult to describe condensate gas reservoirs with thin oil ring. Based on the bedding grid and horizontal grid, mixed grid-modeling method was established by analyzing oil ring distribution and the existing reservoir simulation grid technique. The bedding grid was used to describe distribution of gas reservoirs, and the horizontal grid was used to describe distribution of oil rings. Both grids were effectively coupled into a mixed grid. In the mixed grid, the bedding grid was pinched out at the gas-oil contact surface and coupled with the horizontal grid in geometric shape. The non-adjacent grid conductivity model was used to calculate the flow transmissibility coefficient of fluid flow from the horizontal grid to the bedding grid. The mixed grid method could avoid limitations of bedding grid for describing distribution of oil ring with zigzag, decline the grid number in description of oil ring and enhance calculating velocity in numerical simulation. The dynamic development performance of thin oil ring and the characteristics of bottom water coning could be effectively simulated by this method, the simulated results are more reasonable.

Key words: condensate gas reservoir, thin oil ring distribution, bedding grid, horizontal grid, mixed grid, numerical simulation

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