收稿日期: 2012-03-05
修回日期: 2012-04-14
网络出版日期: 2012-08-10
基金资助
国家科技重大专项项目(编号:2008ZX05013)资助.
Rate Decline Law for Vertical Fracture Wells in Low Permeability Reservoir
Received date: 2012-03-05
Revised date: 2012-04-14
Online published: 2012-08-10
梁利平,蔡明金,贾永禄 . 低渗透油藏压裂井产量递减规律分析[J]. 天然气地球科学, 2012 , 23(4) : 770 -774 . DOI: 10.11764/j.issn.1672-1926.2012.04.770
Since the finite conductivity vertical fractures in the low permeability reservoirs will be formed after fracture treatment of well, we setup the rate decline mathematical model in consideration with threshold pressure gradient and draw the rate decline type curves of fractured well after calculation.We discuss the tendency of curve change.We also illustrate the influence of threshold pressure gradient on productivity of example well in the low permeability reservoirs.The results show that the production decrease rate for the finite conductivity vertical fractures wells in the threshold pressure gradient reservoir is faster than that of ordinary reservoirs, and this difference is especially significant in the middle or later stage of production.The case indicates that the influence of threshold pressure gradient should not be ignored when rate decline for the finite conductivity vertical fractures well in the low permeability reservoirs.
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