A new productivity calculation method of fractured gas well in low permeability gas reservoir

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  • 1.School of Petroleum Engineering,Chongqing University of Science & Technology,Chongqing 401331,China;
    2.Southwest Oil& Gas Field Company,PetroChina,Chengdu 610051,China

Received date: 2017-04-17

  Revised date: 2017-11-14

  Online published: 2018-01-10

Abstract

The low permeability gas reservoirs account for large proportion in gas reservoir exploration and development of China.The low permeability gas reservoir has the characteristics of low permeability and low porosity,which makes it difficult to obtain commercial development directly.So it is necessary to improve the development by fracturing.A large number of experimental studies have testified the existence of threshold pressure gradient,slippage effect,stress sensitivity and high velocity non Darcy flow.At present,most of the productivity researches of low permeability fractured gas wells are mainly based on a single factor,and the study of multiple factors is relatively small.According to the changes of fluid seepage law of gas wells after fracturing,using the fluid mechanics theory of gas reservoirs,a new steady-state productivity calculation method of fractured gas well has been established,which considers threshold pressure gradient,slippage effect,stress sensitivity and high velocity non Darcy flow.An example of a low permeability gas reservoir is analyzed by using the new method and the new method is proved to be reliable.The results show that the threshold pressure gradient and stress sensitivity will reduce the gas well productivity,the stress sensitivity is greater;the slippage effect will reduce productivity slightly in the low pressure stage;we should pay attention to control the production pressure difference to maintain a moderate stable production in the low permeability gas reservoir development.
 

Cite this article

Yang Hao-long,Xiang Zu-ping,Yuan Ying-zhong,Li Long . A new productivity calculation method of fractured gas well in low permeability gas reservoir[J]. Natural Gas Geoscience, 2018 , 29(1) : 151 -157 . DOI: 10.11764/j.issn.1672-1926.2017.12.001

References

[1]Sampath K,William Keighin C.Factors Affecting Gas Slippage in Tight Sandstones of Cretaceous Age in the Unita Basin[C].SPE 9872,1982,34(11):2715-2720.
[2]Rex Thomas D,Don Ward C.Effect of overburden pressure and water saturation on gas permeability of tight sandstone cores[J].Journal of Petroleum Technology,1972,24(2):120-124.
[3]George D V,Application of stress-dependent rock properties in reservoir studies[C].SPE 86979,2004,56(3):2210-2216.
[4]Jiang Tingxue,Shan Wenwen,Yang Yanli.The calculation of stable production capability of vertically fractured well[J].Petroleum Exploration and Development,2001,28(2):61-63.
蒋廷学,单文文,杨艳丽.垂直裂缝井稳态产能的计算[J].石油勘探与开发,2001,28(2):61-63.
[5]Wang Yongli,Jiang Tingxue,Zeng Bin.Productivity performances of hydraulically fractured gas well[J].Acta Petrolei Sinica,2003,24(4):65-68.
汪永利,蒋廷学,曾斌.气井压裂后稳态产能的计算[J].石油学报,2003,24(4):65-68.
[6]Yang Zhengming,Zhang Song,Zhang Xunhua,et al.The steady-state productivity formula after fracturing for gas wells and fracturing numerical simulation[J].Natural Gas Industry,2003,23(4):74-76.
杨正明,张松,张训华,等.气井压后稳态产能公式和压裂数值模拟研究[J].天然气工业,2003,23(4):74-76.
[7]Zhang Weidong,Yang Tiejun,Jiang Tingxue,et al.The conformal transformation method for the productivity of fractured wells calculation[J].Petroleum Geology and Recovery Efficiency,2003,10(8):81-82.
张伟东,杨铁军,蒋廷学,等.保角变换法用于计算压裂井产能[J].油气地质与采收率,2003,10(8):81-82.
[8]Zhang Nan,Xian Bo,Chen Liang,et al.Impact of non-Darcy flow on vertical well productivity in low-permeability gas reservoirs[J].Journal of Chengdu University of Technology,2012,39(4):438-442.
张楠,鲜波,陈亮,等.非达西渗流效应对低渗透气藏直井产能的影响[J].成都理工大学学报,2012,39(4):438-442.[HJ2.2mm]
[9]Yan Wende,Sun Lei,Cheng Xubin.et al.Productivity evaluation of special percolation mechanism in low permeability gas reservoir[J].Natural Gas Industry,2007,27(11):76-78.
严文德,孙雷,程绪彬,等.低渗透气藏特殊渗流机理的产能评价分析[J].天然气工业,2007,27 (11):76-78.
[10]Cao Baojun,Li Xiangfang.Multi fracture productivity model of fractured volcanic gas well[J].Natural Gas Industry,2008,28(8):86-88.
曹宝军,李相方.压裂火山岩气井多裂缝产能模型[J].天然气工业,2008,28(8):86-88.
[11]Zheng Likun.Establishment of trinomial productivity equation for non-Darcy effect low permeability gas reservoir[J].Natural Gas Geoscience,2013,24(1):146-149.
郑丽坤.低渗透气藏非达西渗流三项式产能方程的建立[J].天然气地球科学,2013,24(1):146-149.
[12]Jiang Ruizhong,Han Guangwei,Wang Yang,et al.Research on special seepage mechanism and prediction method for stable productivity of low
permeability gas pools[J].Oil Drilling & Production Technology,2015,37(4):67-71.
姜瑞忠,韩光伟,汪洋,等.低渗气藏特殊渗流机理及稳定产能预测方法[J].石油钻采工艺,2015,37(4):67-71.
[13]Li Yongming,Li Yazhou,Zhao Jinzhou,et al.Transient productivity prediction model of vertical fracture gas well[J].Oil Drilling & Production Technology,2013,35(2):63-66.
李勇明,李亚洲,赵金洲,等.垂直裂缝气井不稳定产能预测新模型[J].石油钻采工艺,2013,35(2):63-66.
[14]Jiang Tingxue,Li Anqi,Jiang Dong.Reckon model of stable state oil rate of vertical fracture well with wellbore flow[J].Oil Drilling & Production Technology,2001,23(4):50-53.
蒋廷学,李安启,姜东.考虑井筒流动的垂直裂缝井稳态产能计算模型[J].石油钻采工艺,2001,23(4):50-53.
[15]Hu Yongle,Luo Kai,Li Xiangfang,et al.Fluid Phase and Percolation Mechanism of Condensate and Low Permeability Gas Reservoirs[M].Beijing:Science Press,2010:121-145.
胡永乐,罗凯,李相方,等.凝析、低渗气藏流体相态与渗流机理[M].北京:科学出版社,2010:121-145.
[16]Zhu Weiyao,Zhu,Huayin,Liu Weidong.Effective Development of Nonlinear Percolation Theory and Development Method for Complex Gas Reservoirs[M].Beijing:Science Press,2013:84-180.
朱维耀,朱华银,刘卫东.复杂气藏有效开发非线性渗流理论和开发方法[M].北京:科学出版社,2013:84-180.
[17]Klinkenberg L J.The permeability of porous media to liquids and gases[J].API Drilling and Production Practice,1941(2):200-213.
[18]Forchheimer P H.Wasserbewegun durch boden[J].Zeitschrift des Vereines Deutscher Ingenieure,1901,45:1781-1788.

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