气井优化配产研究

【作者】 尚万宁；

【导师】 黄炳光； 李安琪；

【作者基本信息】 西南石油学院 ， 油气田开发工程， 2002， 硕士

【摘要】 本文针对国内外气配产和设计中存在的工程问题，在分析传统的单井或气藏配产法(取绝对无阻流量20-30％，地层流入与油管流出动态曲线交汇点以及节点分析方法等)基础上，引入了生产时间动态概念，改变了传统配产与设计的静态方式，提出了气井配产和设计中带时间变量的动态优化，从初步应用成果看，该项研究具有以下特点： 1、从物质平衡方程入手，给出稳产时间和地层压力的变化关系，进而获得地层流入动态曲线(IPR曲线)随生产时间的变化规律。 2、建立的气体从地层-井筒-地面定点间的统一动力学数学模型(单井或气藏数学模型)，充分反映气藏井数，稳产时间，井筒工艺参数系列和地面工作制度间的定量描述。 3、通过对气流沿程节流装置计算方法的分析，提出了气流沿程多节流装置的处理方法， 4、对气体的动力模型进行全面分析，提出了带隐函数的最优化问题的求解方法。 5、经8口井实测资料的处理和对比分析，认为本文给出的方法可靠、适用，具有一定的推广意义。 本文给出的优化数学模型属定容封闭性气藏系统分析，运用该方法可处理带小水体相体侵入较弱的气藏，它在建模思想、求解方法上对凝析气藏和水驱气藏有一定的指导意义。更多还原

【Abstract】 In view of some problems that exist in gas well production optimization and design, after analyzing the conventional methods of peroration plan of single gas well or reservoir (e.g., let production rate be 20 - 30% of Absolute Open Flow, or be the intersection value of inflow and outflow performance curve), we introduce a production time dynamic term into the peroration method, thereby changing the previous static models into a dynamic production optimization and design one. The practical application of the dynamic method shows that the research is of following functions and characteristics:1. A relationship between gas reservoir pressure and stable production time can be obtained by means of material balance technique. According this relationship, we can predict the change of inflow performance relationship curve with time.2. A united dynamic mathematical model is established to describe the flow of gas from the reservoir to well bore and surface. The model can quantitatively reflect the relation among well numbers, stable production time. Well bore technology parameters and surface operation system.3. The paper develops a treatment method to multi-restriction units in gas flow by analyzing the calculation method of restriction units in gas flow.4. The paper develops a solution technique of optimization problem with implicit function by anal sizing the gas dynamic model.5. According to the treatment and contrast analysis of actual data of six wells, it is shown that the method presented in the paper is reliable. Practicable and popularized.The optimization mathematical model presented in the paper is applicable to volumetric gas reservoirs. In addition, it can be adapted to such gas reservoirs as ones with small aquifer. The process and thoughts in establishing the model are valuable to condensate gasreservoir and water invasion gas reservoir.更多还原