改善水驱效果开发技术政策优化研究

POLICY RESEARCH ON LMPROVEMENT FOR TECHNOLOGY OF WATER FLOODING EFFECT DEVELOPMENT

水驱开发油藏,在开发后期水驱效果变差,以前的井网井距已经无法满足其目前开发需求,亟需对井网井距及地层压力保持水平进行调整。以王龙庄断块为例,在对王龙庄断块的存水率、吨油耗水率、含水率与采出程度、注入体积增长倍数等开发指标分析的基础上,采用井网密度与水驱控制程度的关系法和井网密度与采收率的关系法,优化王龙庄断块的合理井网井距。并运用静水柱压力法、地层压力与累积注采比关系法,及开发效果分析法,确定合理地层压力。最终得到:王龙庄断块的合理井网密度为25井/km2,合理井距应为200m;合理地层压力为13.29Mpa。从而为王龙庄断块的后续开发提供了依据。

In the water flooding reservoir,the development effect is getting worse in the later stage of water flooding. Former well pattern and well spacing have been unable to meet the present development needs,it is necessary to adjust the pattern well spacing and the level of formation pressure. Take Wang Longzhuang Fault asexample,on the basis of analysis of Wang Longzhuang Fault water rate,tons of fuel water ratio,water content and recovery degree,injection volume growth factor et al,adopt the relationship between well spacing density and water flooding control degree,and the relationship between well spacing density and recovery to optimize reasonable well pattern and well spacing of Wang Longzhuang Fault. By reservoir pressure hydrostatic pressure method,then the study on relationship between cumulative injection production ratio and formation pressure,and the development effect analysis method,the reasonable formation pressure is determined.. Finally, the reasonable well pattern density of Wang Longzhuang Fault is 25 well /km2,the reasonable well spacing should be200 m,and the reasonable formation pressure is 13. 29 Mpa,which provides the foundation for the Wang Longzhuang Fault`s following development.