New Method of Aquifer Influx Status Identification for Single Well in Gas Reservoir with Aquifer Support

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  • 1.Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China;
    2.PetroChina Natural Gas and Pipeline Company,Beijing 100007,China

Received date: 2015-02-09

  Revised date: 2015-08-22

  Online published: 2015-10-10

Abstract

For gas reservoirs with strong bottom or edge aquifer support,the most important thing is to avoid aquifer breakthrough in gas well.Because water production in gas wells not only results in processing problems in surface facilities,but also explicitly reduces well productivity and reservoir recovery.And there are lots of researches on prediction of water breakthrough time,but they are not practicable because of reservoir heterogeneity.This paper provides a new method with 3 diagnostic curves to identify aquifer influx status for single gas well,which is based on well production and pressure data.The whole production period of gas well can be classified into 3 periods based on the diagnostic curves:no aquifer influx period,early aquifer influx period,middle-late aquifer influx period.This new method has been used for actual gas well analysis,which can accurately identify gas well aquifer influx status and the water breakthrough sequence of all wells in the same gas field.And the evaluation results are very useful for well production rate optimization and gas field effective development.

Cite this article

LI Yong,LI Bao-zhu,XIA Jing,ZHANG Jing,GUO Kai,HU Yun-peng . New Method of Aquifer Influx Status Identification for Single Well in Gas Reservoir with Aquifer Support[J]. Natural Gas Geoscience, 2015 , 26(10) : 1951 -1955 . DOI: 10.11764/j.issn.1672-1926.2015.10.1951

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