Discussion on Cycle Water Injection Effect and Its Influencing Factors
- 作者：Shan WuyiZhang Xue
- 会议时间：2013-05-01
- 关键词：water flooding ; principle ; the opportunity of water injection ; water injection efficiency ; water injection period
- 作者单位：Institute of Petroleum Engineering Northeast Petroleum University Daqing, China
- 母体文献：第二届全国特殊气藏开发技术研讨会论文集
- 会议名称：第二届全国特殊气藏开发技术研讨会
- 会议地点：重庆
- 主办单位：重庆市科学技术协会
- 语种：chi
摘要
Cyclic waterflooding is a kind of waterflood technique, which can improve the waterflood efficiency in low-permeability and fracture-porosity reservoir by changing periodically injected water volume, this article gives the principle and the applied conditions of cyclic waterflooding,and analyses the factors that affect the effect of cyclic waterflooding detailedly, analyzes in detail factors affecting cyclic water-flooding effectiveness.The folluwing conclusions,are drawn:the earlier the cyclic waterflooding process, the better the effectiveness, but the optimal time should be detcrmined by numerical simulations;the longer the cy-clc of the process.the less the permeability;the shorter the cycle. the less the formation elasticity;the betterthe effects, the less the pay zone uniformity;the effectiveness will be the best at proper capillary force.If the ratio of vertical permeability to horizontal one is 0.5, the process effects will be the best;Carrying out nonsym-metrical injection-production process and oil production in turn will get the best cyclic waterflooding effects.