【摘要】 目前常采用关井的方法来确定气藏平均地层压力,但是应用该法通常将遇到一些困难。有的井不能关(超高压气井、高产井等);有的井关井时间太长(低渗气藏上的气井),经济损失较大。总的来说,关井会严重地影响气矿和用气单位的生产,如果专门为获得平均地层压力而关井,其代价太大。本文为克服上述困难进行了一些初步尝试,采用系统辨识方法来计算气藏平均地层压力,仅以日常气井生产记录为基本资料,不需要关井测试,无疑具有较高的经济效益和实用性。更多还原

【Abstract】 Average gas pool pressure is currently determined by shutting up of wells which is fraught with difficulties. Wells with super-high pressure or high flow rate can not be closed, and wells in tight pools with low permeability, to be closed for a long time, will incur heavy economic losses. At all events, shut-in of gas wells would seriously affect the producer and the consumer, and it would mean too high a cost just for taking the average formation pressure. To overcome the above, the authors have attempted to introduce a system iden- tification method to compute the average pressure based on records of daily output of gas wells without shutting up the well. It is no doubt economical and practical.更多还原