公开(公告)号：WO2014078851A3

公开(公告)日：2014-08-28

申请号：PCT/US2013070780

申请日：2013-11-19

Applicant: LUFKIN IND LLC

Inventor： CHEN ZENGSHI ,  DORADO DONEIL ,  OESTREICH ERIC ,  HUGHES GARY ,  CORDOVA ANDY

IPC: F04B47/00 ,  E21B47/00 ,  F04B49/06

CPC classification number: E21B47/0007 ,  E21B47/0008 ,  E21B47/09 ,  F04B47/02 ,  F04B49/065

Abstract: Methods and techniques for calculating a pump card in synchronization with the surface card are described. The techniques are developed on a platform in which the finite difference method or the Fourier series method is used to solve the wave equation of a rod string for oil wells. Calculation of the first pump data point can be based on part or the complete set of the data points of the first surface stroke. A variety of techniques for displaying and erasing the surface and pump cards are described. The redundant or unnecessary calculation in both the finite difference algorithm and the Fourier series algorithm for real-time pump diagnostic is eliminated. The wave propagation delay concept is applied to the real-time pump diagnostic algorithms. The proposed methods are verified in the simulations for oil wells with single taper or multi-taper rod strings and with various pumping conditions. The proposed real-time pump diagnostic algorithm is not only suitable for the demonstrated mathematical methods but also suitable for the other mathematical methods.

Abstract translation: 描述了与表面卡同步计算泵卡的方法和技术。 该技术是在有限差分法或傅里叶级数法的平台上进行开发的，用于求解油井用杆柱的波动方程。 第一泵数据点的计算可以基于第一表面行程的部分或全部数据点。 描述了用于显示和擦除表面和泵卡的各种技术。 消除了用于实时泵诊断的有限差分算法和傅里叶级数算法中的冗余或不必要的计算。 波传播延迟概念应用于实时泵诊断算法。 所提出的方法在具有单锥形或多锥形杆柱以及各种泵送条件的油井的模拟中得到验证。 所提出的实时泵诊断算法不仅适用于所示的数学方法，而且适用于其他数学方法。