低渗透气田动态监测技术指标计算方法研究

The Research of Low Permeability Gas Field Dynamic Inspection Technology Guideline Calculating Method

动态监测是气田开发过程中的一项重要工作。针对低渗透气田关井压力恢复缓慢、地层压力测试时间长,重复产能试井工作量大、成本高,井筒液面探测往往受到条件限制等问题,基于气藏工程理论,研究提出了计算气井当前地层压力和无阻流量、井筒液面位置的简易方法。这不仅可以适当减少动态监测工作量,而且可弥补或补救缺失及不成功的动态监测资料,同时为有关气藏工程研究提供了新方法,并起到一定指导作用。计算实例表明,应用简便,结果可靠。

Dynamic inspection is a significant work in the process of gas field exploitation. Contraposing the slow rapidity of closed-in pressure comeback, overtime of pore pressure test, great workload and high cost when carry through repeated off-take potential in low permeability gas field, on the basis of theory of gas reservoir engineering, the research concludes the simple method of calculation of present pore pressure, open flow potential and the position of well bore fluid level. It not only reduces the workload of dynamic inspection, but also can offset or remedy the dynamic inspection data, which is absent or unsuccessful. At the same time, it provides the new method to research the theory of gas reservoir engineering, and it has instructional function. The calculation practice indicates the application is simple and the result is reliable.