摘要
由于近井带反凝析、水锁或储层再压实等原因导致渗透率降低,压力恢复曲线常出现复合储层特征。基于气井非达西稳定流产能方程,利用试井解释确定的渗透率、表皮系数、内外边界等参数,结合气井投产初已获取的产能方程,推导出目前复合型储层气井产能方程系数的计算方法,实现气井产能快速计算。理论计算与实测对比,绝对误差低于5%,表明该方法可靠,实用性强。
Due to reasons of retrograde condensate at the near wellbore,water blocking,or layer reconsolidation,it results in a decrease of permeability near wellbore area,and that of curves of build-up pressure often appears feature of the composite reservoirs. Based on the nonDarcy steady flow deliverability equation of gas well,using the information of permeability,skin factor,and internal and external boundary parameters,and combining with the deliverability equation of gas well in the beginning of production,it is derived of the calculation method of A and B ratio of the present deliverability equation,so as to calculate gas well deliverability quickly. Comparing between theoretical calculation and actual measurement,the absolute error is less than 5%,which indicates that the method is reliable and practical.
出处
《油气井测试》
2017年第1期24-26,共3页
Well Testing
关键词
复合储层
产能方程
试井
近井带
composite reservoir
deliverability equation
well testing
near wellbore
