公开(公告)号：US5871047A

公开(公告)日：1999-02-16

申请号：US909558

申请日：1997-08-12

申请人： Jeff Spath ,  Joe M. Mach

发明人： Jeff Spath ,  Joe M. Mach

IPC分类号： E21B47/00

CPC分类号： E21B47/00

摘要： A method is presented to estimate the productivity index, PI, and the well condition, s, of a pumping well utilizing the knowledge of pump runtime versus downtime. Runtime and downtime may be constantly and automatically recorded and transmitted to a central location. A model runtime is computed assuming the two unknowns, PI and s. The model is then compared with the actual runtime data. A nonlinear optimization technique is used to search for the unknown parameters such that the differences between the measured data and the numerically simulated data are minimized in a least-squares fashion. The proposed estimation procedure is an economical and accurate method for monitoring the behavior of a well resevoir system during runtime.

摘要翻译： 提出了一种利用泵运行时间与停机时间的知识来估计泵送井的生产率指数，PI和井条件s的方法。 运行时间和停机时间可能会不断自动记录并传输到中央位置。 假设两个未知数PI和s计算一个模型运行时间。 然后将该模型与实际运行时数据进行比较。 使用非线性优化技术来搜索未知参数，使得测量数据和数值模拟数据之间的差异以最小二乘法最小化。 所提出的估计过程是在运行时监测井底系统的行为的经济和准确的方法。