The Dynamic Characteristic Research Of Pressurized Gas Wells In Jingbian Gas Field

The production and the pressure of gas well are decreasing unremittingly with the exploitation of Jingbian Gas Field. At present, supercharging measures have adopted on a large number of low production and low efficiency gas wells. Hence, it is extremely important to study the dynamic characteristics for pressurization mining, to evaluation the effectiveness of pressurization mining, to find a set of suitable technology of pressurization mining for low production and low efficiency wells, and to give full play to potential capacity of this kind of gas well for keeping a stable production and managing in later period of Jingbian Gas Field.In this paper, taking the supercharging gas wells of Jingbian Gas Field as the research object, using the analysis method of gas reservoir engineering, drawing support from numerical simulation software, and accomplished the following research:firstly, classifying the supercharging gas wells and analyzing the production performance for all kinds of typical gas wells, combined with dynamic data, based on the cognition of the geologic characteristics of the areas which supercharging gas wells located in. Secondly, comparing and analyzing the change of pressure loss and bottom-hole liquid loading for each well comprehensively before and after using supercharging measure. Thirdly, studying the change and analyzing the influencing factors of gas well dynamic reserves, based on pressure fall-off curve method and RTA method, by using TOPAZE analysis software. Fourthly, researching the decline law and the rate-maintenance capability for the different types of supercharging gas wells before and after adopting supercharge measure. Finally, based on the above research, take Shan66well block of Jingbian Gas Field as a research object, through the numerical simulation to optimize the best production plan for this well block, and give a production management measures for Jingbian Gas Field.Drawing the conclusion that supercharging measures have favorable effect on increasing and keeping the capacity of production for each station. The three kinds of gas well after supercharging, the proportion of the pressure loss in stratum was increased, and the proportion of the pressure loss in wellbore was decreased. The situation of wellbore liquid for the most gas wells has improved obviously, but it does not have any improvement in Class III gas well. After supercharging, the declining rate of production has reduced obviously, and the capacity of stable production has improved to a certain degree. For the gas wells which have high declining rate in preliminary stage of supercharging, it must be determine the reasonable scale of production and reduce production moderately in order to reach a stable productive state. For watered-out well in water-enriched region, not only need be adopted supercharging measures, but also need inject foaming agent to the well be used for drainage gas recovery. In addition, optimizing the process of the production equipment to reduce the resistance in pipeline also is necessary.Production management measures which research for supercharging of Jingbian Gas Field are significant in carrying out the large scale supercharging exploitation in further development.