气井产能分析方法研究

【作者】 曾凡华；

【导师】 黄炳光；

【作者基本信息】 西南石油学院 ， 油气田开发工程， 2002， 硕士

【摘要】 目前的气井产能分析方法都是确定气井的绝对无阻流量。因而都需要一个稳定的测试点。而事实上，稳定是不可能达到的。是否存在着通过不稳定的气井试井来确定气井产能的方法呢?本文首先在基于实际无阻流量(或称瞬时无阻流量)的概念的基础上，讨论了这个问题。 本文首先讨论了均质气藏和非均质气藏的气体渗流原理，然后回顾了常规的气井产能分析方法。在此基础之上，本文分别推导了均质气藏和非均质气藏的变产量条件下的二项式气井产能方程，并提出了相应的气井产能分析方法和实际无阻流量的计算方法。由于在实际资料的处理中，经常会受到人为选点的影响，使得不能分析出结果或者分析的结果可信度较低，为此本文还提出了气井产能分析的最优化模型，即以各产量段的一致性和分析结果的可靠性为目标选择各产量段下合适的测试数据作为气井产能分析的输入数据，从而达到分析过程中不需要人机交互，直接程序自动给出最优结果的目的。 通过采用本文提出的方法对某个油田实际测试资料的处理表明，本方法结果可信度高。本方法由于不需要稳定的产能测试，因而节省了大量的测试时间和测试费用，这即带来了直接的经济效益又使得进行产能测试不影响气田生产，从而可以进行更多井的测试和带来间接的经济效益。更多还原

【Abstract】 At present, all the gas well productivity analysis method need to ascertain the absolute open flow potential; thus need a stable test pot. In fact, it is impossible to get stable. Is there any method, which ascertain gas well productivity via unstable gas well test? At first, this thesis discusses the above problem on base of the practical open flow potential.At first, this thesis discuss the flow principle of gas through porous media for homogeneous gas reservoir and heterogeneous gas reservoir; then, we review conventional gas well productivity analysis methods. On the foundation of above, this thesis deduce gas well variable-rate productivity quadratic equation for homogeneous gas reservoir and heterogeneous gas reservoir; and put forward corresponding gas well productivity analysis method and the calculation method of practical open flow potential. When we deal with the practical data, manual pot-selection always affect the effect of the management result; thus, the analysis result can not be obtained; or the analysis result is not reliable. In order to solve the problem, this thesis put forward the optimization model of gas well productivity analysis. That is to say, take the consistency in every yield segment and the reliability of the analysis result as target, choose appropriate test data in every yield segment as input data for gas well productivity, Thereby analysis process do not need alternation between man and computer, direct procedure automatically present optimization result.The management results show that the new method is properly reliable. The new method do not need stable test, so we can save vast test time and test expense, which bring immediate economic benefit and have no infection on the gas oilfield production when we test the productivity, accordingly we can test more well, which can bring indirect economic benefit.更多还原