摘要
采用取自四川的特低渗透砂岩露头岩心,制作了4个具有不同渗透率的二维平板模型,并进行了衰竭式开采实验。实验结果表明,在初始压力相同的情况下,储层渗透率越小,储层压力下降速度越慢,储层的初始产量、初始递减率和累积产量越小;特低渗透储层产量递减规律与有效驱动因子有着密切的关系,在对低渗透储层(尤其是特低渗透储层)进行产量递减分析与预测时,必须考虑启动压力梯度的影响。
Some cores from an outcrop sandstone with ultra-low permeability in Sichuan province were used to prepare four 2D physical models with various permeability,with which a depleted production experiment was conducted.The experimental results have shown that at the same initial pressure,the lower the reservoir permeability is,the slower the reservoir pressure decreases,and the smaller the reservoir initial production,initial production decline and cumulative production are.The production decline pattern of reservoirs with ultra-low permeability may be closely related with the effective displacememt factor,and the start-up pressure gradient must be considered when analyzing and predictihg production decline of reservoirs with low（especially ultra-low） permeability.
出处
《中国海上油气》
CAS
北大核心
2011年第2期97-99,共3页
China Offshore Oil and Gas
基金
国家重大专项“特低渗透油藏有效补充能量技术研究”子课题(2008ZX05000-013-02)部分研究成果
关键词
特低渗透储层
产量递减规律
物理模拟实验
启动压力梯度
reservoir with ultra-low permeability
production decline pattern
physical modelling experiment
start-up pressure gradient
