收稿日期: 2004-06-07
修回日期: 2004-10-09
网络出版日期: 2004-12-20
METHODS TO IDENTIFY EARLY WATER INFLUX OF GAS RESERVOIRS
Received date: 2004-06-07
Revised date: 2004-10-09
Online published: 2004-12-20
康晓东,李相方,张国松 . 气藏早期水侵识别方法[J]. 天然气地球科学, 2004 , 15(6) : 637 -639 . DOI: 10.11764/j.issn.1672-1926.2004.06.637
Watering out of gas wells influences the deliverability of gas wells and the recovery of gas reservoirs severely. During the development of gas reservoirs, it is key to identify early water influx for producing without water and developing actively. Presently, there are many methods such as water monitoring, pressure monitoring, well test and so on. In this paper, the applicability of the methods is presented respectively: the method of water monitoring can be used only after producing water of gas well, the method of P/Zplot is used at the stage of nonlinear relationship between P/Z and cumulative gas production, the methods of well test can be used with abundance well test data, water influx calculation has its uncertainty. And then, it is given that analyzing all information on water invasion synthetically is the only way to reducing the risk of identifying early water influx of gas reservoirs based on its complexity and the applicability of the methods.
Key words: Gas reservoirs; Water gas rate; Water influx; Transient well testing.
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