A New Method for Predicting Productivity of Fractured Horizontal Wells in Low-permeability Tight Gas Reservoir

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  • 1.Research Institute of Petroleum Exploration and Development,Beijing 100083,China;
    2.SINOPEC Shengli Directional Drilling Company,Dongying 257064,China

Received date: 2014-11-21

  Revised date: 2015-01-16

  Online published: 2015-09-10

Abstract

Adopting potential theory,the superposition principle and the related principle of fluid mechanics,a steady mathematical model for fractured horizontal well is established considering interactive disturbance among fractures,pollution skin,non-uniform distribution of fracture,finite conductivity flow in fracture and wellbore,and fracture-wellbore convergent flows,non-Darcy flow in fracture.Then the numerical solution to the model is derived.The model is applied to predict an actual productivity of horizontal wells and to analyze the influence factors of productivity.Result shows that the model can be used for horizontal well productivity prediction with various complicated situations and it shows high accuracy.Due to the fracture′s mutual interference,the production rate of fracture differs.Fractures on both ends of the horizontal wellbore have high yield,while fractures in middle have low yield.Horizontal well productivity increases with the growth of horizontal interval length,fracture half-length,and fracture conductivity.Pollution skin of fracture has significant effects on productivity.The increase of it leads to a sharp decline of productivity.Thus it is important to reduce the damage of fracturing operation on formation as much as possible.Within relatively reasonable fracture spacing scope,the effect of fracture distribution pattern on productivity is not obvious.Since wellbore radius affects wellbore pressure drop,its design should be in accordance with the productivity of the horizontal wells.

Cite this article

LI Bo,JIA Ai-lin,HE Dong-bo,LI Xue-ying . A New Method for Predicting Productivity of Fractured Horizontal Wells in Low-permeability Tight Gas Reservoir[J]. Natural Gas Geoscience, 2015 , 26(9) : 1793 -1802 . DOI: 10.11764/j.issn.1672-1926.2015.09.1793

References

[1]Holditch S A.Tight gas sands[J].Journal of Petroleum Technology,2006,58(6):86-93.
[2]Dai Jinxing,Ni Yunyan,Wu Xiaoqi.Tight gas in China and its significance in exploration and exploitation[J].Petroleum Exploration and Development,2012,39(3):257-264.[戴金星,倪云燕,吴小奇.中国致密砂岩气及在勘探开发上的重要意义[J].石油勘探与开发,2012,39(3):257-264.]
[3]Ma Xinhua,Jia Ailin,Tan Jian,et al.Tight sand gas development technologies and practices in China[J].Petroleum Exploration and Development,2012,39(5):572-579.[马新华,贾爱林,谭健,等.中国致密砂岩气开发工程技术与实践[J].石油勘探与开发,2012,39(5):572-579.]
[4][JP2]He Dongbo,Jia Ailin,Ji Guang,et al.Well type and pattern optimization technology for large scale tight sand gas,Sulige Gas Field[J].Petroleum Exploration and Development,2013,40(1):79-89.[何东博,贾爱林,冀光,等.苏里格大型致密砂岩气田开发井型井网技术[J].石油勘探与开发,2013,40(1):79-89.]
[5]Lu Tao,Zhang Ji,Li Yuegang,et al.Horizontal well development technology for tight sandstone gas reservoirs in the Sulige Gas Field,Ordos Basin[J].Natural Gas Industry,2013,33(8):38-43.[卢涛,张吉,李跃刚,等.苏里格气田致密砂岩气藏水平井开发技术及展望[J].天然气工业,2013,33(8):38-43.]
[6]Yang Zhilun,Zhao Weilan,Chen Qiwen,et al.High efficiency and productivity technology for horizontal wells in the Sulige Gas Field,Ordos Basin[J].Natural Gas Industry,2013,33(8):44-48.[杨志伦,赵伟兰,陈启文,等.苏里格气田水平井高效建产技术[J].天然气工业,2013,33(8):44-48.]
[7]Giger F M.The Reservior Engineering Aspects of Horizontal Well[R].SPE 13024.SPE Annual Technical Conference and Exhibition,16-19 September,Houston,Texas,1984.
[8]Mukherjee H,Economides M J.A parametric comparison of horizontal and vertical well performance[J].SPE Formation Evaluation,1991,6(2):209-216.
[9]Joshi S D.Augmentation of Well Productivity Using Slant and Horizontal wells[J].Journal of Petroleum Technology,1988,40(6):729-739.
[10]Prats M.Effect of vertical fractures on reservoir behavior—Incompressible fluid case[J].SPE Journal,1961,1(2):105-118.
[11]Raghavan R,Joshi S D.Productivity of multiple drainholes or fractured horizontal wells[J].SPE Formation Evaluation,1993,8(1):11-16.
[12]Lang Zhaoxing,Zhang Lihua,Cheng Linsong.Investigation on productivity of fractured horizontal well[J].Journal of the University of Petroleum,1994,18(2):43-46.[郎兆新,张丽华,程林松.压裂水平井产能研究[J].石油大学学报,1994,18(2):43-46.]
[13]Han Shugang,Cheng Linsong,Ning Zhengfu.A new method for predicting productivity of fractured horizontal wells in gas reservoir[J].Journal of the University of Petroleum:Edition of Natural Science,2002,26(4):36-39.[韩树刚,程林松,宁正福.气藏压裂水平井产能预测新方法[J].石油大学学报:自然科学版,2002,26(4):36-39.]
[14]Ning Zhengfu,Han Shugang,Cheng Linsong,et al.Productivity calculation method of fractured horizontal wells in lowpermeability oil or gas field[J].Acta Petroleum Sinica,2002,23(2):68-72.[宁正福,韩树刚,程林松,等.低渗透油气藏压裂水平井产能计算方法[J].石油学报,2002,23(2):68-72.]
[15]Li Tingli,Li Chunlan,Wu Ying,et al.A new way to calculate fractured horizontal wells productivity in low permeability oil reservoirs[J].Journal of China University of Petroleum:Edition of Natural Science,2006,30(2):48-52.[李廷礼,李春兰,吴英,等.低渗透油藏压裂水平井产能计算新方法[J].中国石油大学学报:自然科学版,2006,30(2):48-52.]
[16]Fan Zifei,Fang Hongchang,Niu Xinnian.A steady solution formula of horizontal well productivity in a fractured reservoir[J].Petroleum Exploration and Development,1996,23(3):52-57.[范子菲,方宏长,牛新年.裂缝性油藏水平井稳态解产能公式研究[J].石油勘探与开发,1996,23(3):52-57.]
[17]Zhang Feng,Zhao Shimin,Qin Jianmin,et al.Productivity of the horizontal well with finite-conductivity fractures[J].Natural Gas Geoscience,2009,20(5):817-821.[张枫,赵仕民,秦建敏,等.有限导流裂缝水平井产能研究[J].天然气地球科学,2009,20(5):817-821.]
[18]Cinco-Ley H,Samaniego-V F,Domínguez N.Transient pressure behavior of a well with a finite-conductivity vertical fracture[J].SPE Journal,1978,18(4):253-264.
[19]Riley M F.Analytical Solutions for Elliptical Finite-Conductivity Fractures[R].SPE 22656.SPE Annual Technical Conference and Exhibition,6-9 October,Dallas,Texas,1991.
[20]Guo B,Yu X,Khoshgahdam M.A simple analytical model for predicting productivity of multi-fractured horizontal wells[J].SPE Reservoir Evaluation & Engineering,2009,12(6):879-885.
[21][KG*5/6]Wang Zhiping,Zhu Weiyao,Yue Ming,et al.A method to predict the production of fractured horizontal wells in low/ultra-low permeability reservoirs[J].Journal of University of Science and Technology Beijing,2012,34(7):750-754.[王志平,朱维耀,岳明,等.低、特低渗透油藏压裂水平井产能计算方法[J].北京科技大学学报,2012,34(7):750-754.]
[22]Wang Zhiping,Ran Qiquan,Tong Min,et al.New forecasting method of fractured horizontal well productivity in volcanic gas reservoirs[J].Natural Gas Geoscience,2014,25(11):1868-1874.[王志平,冉启全,童敏,等.火山岩气藏压裂水平井产能预测新方法[J].天然气地球科学,2014,25(11):1868-1874.]
[23][JP2]Aguilera R.Knudsen′s permeability correction for tight porous media[J].Transport in Porous Media,2012,91(1):239-260.
[24]Zhang F,Yang D.Determination of fracture conductivity in tight formations with Non-Darcy flow behavior[J].SPE Joural,2014,19(1):34-44.
[25]Chen N H,An explicit equation for friction factor in pipe[J].Ind.Eng.Chem.Fundamen.,1979,18(3):296-297.
[26]Dikken B J.Pressure drops in horizontal wells and its effects on their production performance[J].Journal of Petroleum Technology,1990,42(11):1426-1433.
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