摘要
提出了一种用于自动历史拟合的方法——改进牛顿法。通过１个一维径向单相流４个节点，２０个时间步的压力拟合验证，其收敛速度快、精度高，迭代到２３步时，渗透率为０．４９９８，与真实值的绝对误差为０．０００２；孔隙度为０．２５０７．与真实值的绝对误差为０．０００７．该方法还可用于自动试井解释和非线性回归分析。
Abstract A method for automatic history fit-improved Newtonian method was advanced,and amathematical model was set up.In applying a one-dimensional radial single-phase flow with4-joint framework,20 time steps of pressure fit proved its high convergence velocity and ac-curacy. At the 23rd alternation,permeability is 0.499 8,showing an absolute error of 0.002 from real value, porosity is 0.250 7,the absolute error of which is 0.000 7 from the re-al value. The method is applicable for automatic well-testing and nonlinear regression-analy-sis.SUBJECT TERMS:automatic history fit,Newtonian method,model parameter,objective function,mathematical model
出处
《大庆石油学院学报》
CAS
北大核心
1995年第1期16-20,共5页
Journal of Daqing Petroleum Institute
