摘要
对致密油藏的广义与狭义概念,二者的适用范围进行了阐述,对比常规油藏,分析了致密油藏的开发特征、产生原因及国内致密油藏的开发技术。致密油藏具有明显的开发特征:(1)初期油水同产,含水率稳定,一段时间后含水率下降;(2)油井的动液面随着时间的推移变化很快;(3)致密油藏衰竭式开发时,递减呈"三段式"特征。水平井体积压裂衰竭式开发递减快,一次采收率低,常规注水开发不适用于致密油藏,注水吞吐、体积压裂闷井、重复压裂开发等是现阶段提高致密油藏采收率的重要开发技术。
The concept of broad and narrow tight oil reservoirs and the scope of the two are described,compared to conventional reservoir,the development characteristics and the causes of tight oil reservoir are analyzed,domestic tight reservoir development techniques are introduced.Tight oil reservoir development has obvious characteristics.（1）In the early stage, both the water and oil is produced,the water cut remain unchanged,after a period of time,it drops.（2）Fluid level changes rapidly over time.（3）When tight oil reservoir is developed by natural depletion, it shows ＂three-stage＂ feature.Horizontal well with volumetric fracturing production drops fastly,the first recovery rate is low,and the conventional waterflooding is not suitable for tight oil reservoir development.Cyclic water injection, volume of fracturing and closing in wells and repeated fracturing technique are important development techniques to improve the tight oil reserviors recovery at present.
出处
《石油化工应用》
CAS
2016年第3期15-18,共4页
Petrochemical Industry Application
关键词
致密油藏
体积压裂
开发特征
开发技术
tight oil
volumetric fraturing
development characteristic
development technique
