摘要
对于超低渗透砂岩油藏,合理的井底流压是保证油井稳产的关键因素之一。启动压力和应力敏感性的存在,使得超低渗透油藏油井合理流压的确定更加困难,开发难度加大。在前人研究的基础上,考虑启动压力梯度和应力敏感性的影响,对已有的油井产能方程进行修正;与油相的相对流动能力相结合,建立了新的油井流入动态方程。以鄂尔多斯盆地L1区长8油藏为例,对新的油井流入动态方程的可靠性进行分析验证,探讨了超低渗透油藏油井合理流动压力确定方法,为矿场实际生产提供科学依据。
To ultra-low permeability sandstone reservoir,proper bottom-hole fluid pressure is a key to stable production of the wells. It is very difficult to determine proper bottom-hole fluid pressure due to the threshold pressure and pressure-sensitive. Based on the previous studies,considering the impacts of threshold pressure gradient and pressure-sensitive,modifying the old production equation,combining with the oil phase relative fluid ability,a new IPR equation was developed. It shows that the new IPR equation can be used for determining the reasonable fluid pressure and provide a theoretical basis for reasonable developing ultra-low permeability sandstone reservoir.
出处
《科学技术与工程》
北大核心
2015年第5期234-237,257,共5页
Science Technology and Engineering
关键词
超低渗透
井底流压
启动压力
应力敏感性
流入动态
ultra-low permeability reservoir bottom-hole fluid pressure threshold pressure pressure-sensitive inflow performance
