P Gas Field Gas Well Production Capacity And Reasonable Production Research

Located in the northeast of Sichuan province, China. P gas field is the main gas supply system in the gas transportation project which is significantly important for development of economy, safety and adjustment of energy, protection of environment and security of people's life. The characteristics of this gas field are high pressure and production, deep burial with thin edge water.In addition, there are many wells in the main part of field but the production capacity of them are quite different and the dynamic production law is extremely complicated. Due to the early stage of production, the production capacity analysis of each gas well should be researched in order to enhance production efficiency. Therefore the production capacity analysis and prediction including proration were discussed in this paper according to the information of dynamic production data, which will help to stable yields of this field. The main content of this research are following.(1) After using the methods of binomial expression and exponential function to analyze the result of open flow potential test and modified isochronal test, and modifying abnormal data, the single-point empirical formula has been established which was suit for the gas field.(2) Basing on the current dynamic production data, the steady seepage theory, productivity analysis of steady point, dynamic productivity analysis, new established single point and the productivity interpretation of water producing in layer have been used to predict deliverability of gas well.(3) In order to obtaining high production, the reasonable proration has been decided according to the methods of absolute open flow potential, critical flow rate of carrying liquid, indicating curve of gas production, nodal system analysis,optimization of proration and numerical simulation.On the basis of dynamic production data and deliverability testing, some methods were used to predict the current productivity of gas well and decide the reasonableproration, the result of this research was significant for the stable and high development of the gas field.