石油学报 ›› 2002, Vol. 23 ›› Issue (5): 64-68.DOI: 10.7623/syxb200205013

• 油田开发 • 上一篇    下一篇

含油砂体多组合油层注水开发压力恢复曲线解释

齐与峰, 盛建民   

  1. 中国石油勘探开发研究院, 北京, 100083
  • 收稿日期:2001-11-08 修回日期:2002-02-21 出版日期:2002-09-25 发布日期:2010-05-21
  • 作者简介:齐与峰,男,1930年10月生,1953年毕业于清华大学石油工程系,教授级高级工程师,长期从事渗流力学及油田开发系统工程方法科学研究工作.
  • 基金资助:
    中国石油天然气总公司"八五"科技攻关项目"油气田开发系统工程方法研究"(85-503-10)部分成果.

Interpretation studies on pressure build-up curves for reservoirs composed of multiple oily sandy bodies during water-flooding period

QI Yu-feng   

  1. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China
  • Received:2001-11-08 Revised:2002-02-21 Online:2002-09-25 Published:2010-05-21

摘要: 注水开发之后地下出现了许多新情况,因为井内各油砂体内注水受效程度千差万别.以叠加原理为基础而形成的求解方法不能把已观察到的情况纳入原始模型之中.为此,提出了一种新的解决方法,即:先把系统在注采井距之半处分割,并设置为外边界封闭条件;再把脱气油砂体、见水油砂体内的多相流动依据渗流力学原理化解为“扩充单相”流动.最后,把已观察到的新情况及分割、扩充后的结果一并纳入定解条件中去,经直接求解得到了压力恢复表达式.以此为基础,在多种条件下可计算出各自的曲线,为解释工作提供了理论依据.特别是文内提出的“第三段”应用方法,对于寻找注水未见效油砂体内剩余油具有独特效益.

关键词: 多油砂体, 组合油层, 注水开发, 压力恢复曲线, 计算公式

Abstract: In the water injection stage,some new spectacles can be observed,because the water-flooding effects are very different in relative sandy bodies.The solving approach based on superposition principles may lose some needed information,so that a new method is presented.The water-invaded sandy bodies have to split up in the middle positions among injectors and producers,and the bounded conditions to be set up.The multiphase flows in gas-oil and water-oil sand bodies were changed into enlarged single-phase flows.The observed information and enlarged results are all put into the boundary and initial conditions.A set of analytical formulas may be obtained by solving a partial differential equation,and many kinds of pressure build-up curves can be plotted on the basis of diverse parameter combinations.This work not only could be used to enriching our knowledges for interpretations but also indicates the application of "third segments",which is very favorable for discovering remainingoil in the ineffective oily sandy bodies by using water-flooding.

Key words: multiple oily sandy bodies, composed reservoirs, water injection, pressure build-up curves, formulas

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