西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (1): 58-60.DOI: 10.3863/j.issn.1674-5086.2009.01.014

• 石油与天然气工程 • 上一篇    下一篇

特低渗油藏水驱开发效果评价方法研究

刘辉a 何顺利a 李俊键a 杨明慧b 尚希涛a   

  1. 中国石油大学:a.石油工程教育部重点实验室,b.盆地与油藏研究中心,北京昌平102249
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-02-20 发布日期:2009-02-20

EVALUATING METHODS OF WATER-FLOODING DEVELOPMENT EFFECTIVENESS IN ULTRA-LOW PERMEABILITY RESERVOIR

LIU HuiaHE Shun-liaLI Jun-jianaYANG Ming-huibSHANG Xi-taoa   

  1. China University of Petroleum:a.MOE Key Laboratory of Petroleum Engineering,b.Basin & Reservoir Research Center,Changping Beijing 102249,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-02-20 Published:2009-02-20

摘要:

针对特低渗油藏生产采用常规开发指标难以有效评价油藏生产动态的问题,引入有效驱动渗透率的概念,认为只有渗透率大于有效驱动渗透率的油层中的流体才参与流动。运用活塞驱替理论推导了含启动压力梯度两相流的有效驱动渗透率计算公式,可以确定油藏中参与流动的小层比例,并对各小层渗透率、有效厚度等参数加权平均计算后,运用产能公式得到各层流量,进而计算出油井产量,最终确定实际启动的地质储量,运用启动地质储量对采出程度等常规开发指标进行修正。结合长庆特低渗油藏开发动态研究表明,修正后的开发指标能准确有效地评价生产开发效果。

关键词: 特低渗, 有效驱动渗透率, 启动压力梯度, 地质储量, 开发评价

Abstract:

Practice in production of ultra-low permeability reservoirs indicate that it is difficult to evaluate the reservoir production performance with conventional development index effectively,so,the effective flooding permeability is introduced,and research shows the fluid can flow in the sublayers whose permeability is greater than the limit.Formula calculation of the effective flooding permeability in two-phase flow of threshold pressure gradient is derived by using the method of piston drive,and proportion of flowing sublayers is determined.With net thickness and permeability of each sublayer that is weighted on on average,each sublayer and oil well deliverability are calculated,then actual threshold geologic reserve is determined finally.Conventional development indexes,such as degree of reserve recovery etc,are amended by using threshold geologic reserve.Study on production performance in that the development indexes that are amended can be used to evaluate development effectiveness accurately and efficiently.

Key words: ultra-low permeability, effective flooding permeability, threshold pressure gradient, geologic reserve, development evaluation

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