摘要
气井无阻流量是合理配置气井产量的重要依据,经对气井产能试井过程中套压和油压的变化状况进行分析,确定合理的套压值,形成了利用地面测试资料准确计算井底流压的方法。提出了采用多元回归分析得到原始地层压力pr、层流项系数A和紊流项系数B的新方法。从而在无地层压力和井底流压的情况下,建立了二项式产能方程,并得到了气井的无阻流量。实例表明,用地面测试资料确定的气井无阻流量与实测井底流压和地层压力得到的无阻流量的相对误差仅为0.31%,验证了利用地面测试资料计算气井无阻流量的合理性。
Gas well production allocation is mainly base on open-flow capacity. This paper presents a method to appropriately selecting casing pressure and accurately calculating the bottom hole pressure by surface test data,which is according to the dynamics of casing pressure and tubing pressure during the deliverability test for a gas well. Then it proposes a new method to get the initial formation pressure,laminar coefficient and turbulence coefficient using multivariate regression analysis method. On this basis,the deliverability equation is established and the open-flow capacity is calculated by lack of test data of bottom hole pressure and reservoir pressure. The field application shows that the relative error of open-flow capacity of a gas well calculated by surface test data is only 0. 31% compared to that calculated by test data of bottom hole pressure and reservoir pressure. It demonstrates the fitness of the new method of calculating openflow capacity for a gas well by surface test data.
出处
《油气井测试》
2014年第6期15-17,73-74,共3页
Well Testing
关键词
气井
地面测试
多元回归
产能方程
无阻流量
gas well,surface test,multivariate regression,deliverability equation,open-flow capacity
