页岩气藏水力裂缝参数优化设计方法研究
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摘要
近年来页岩气开发越来越受到重视,但由于页岩储层渗透率过低,需要进行压裂优化设计才能获得较高的产能。用雷诺数表征页岩气在裂缝内的非达西流动以及对井底流压的影响,建立了裂缝有效渗透率模型,将其引入到支撑剂指数模型中,建立了页岩气产能计算模型,并拟合了f函数,归纳总结了新的页岩气藏水力裂缝参数优化设计方法。通过应用实例计算表明,考虑页岩气在裂缝中的非达西流动后,裂缝有效渗透率、最优缝长以及页岩气产能都会明显减小,最优缝宽明显增加。
引文
[1]郭天魁,张士诚,葛洪魁.评价页岩压裂形成缝网能力的新方法[J].岩土力学,2013,34(4):947-954.
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[6]叶登胜,尹丛彬,蒋海,等.四川盆地南部页岩气藏大型水力压裂作业先导性试验[J].天然气工业,2011,31(4):48-50.
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[2]陈尚斌,朱炎铭,王红岩,等.中国页岩气研究现状及发展趋势[J].石油学报,2010,31(7):689-694.
[3]董大忠,邹才能,杨桦.中国页岩气勘探开发进展与发展前景[J].石油学报,2012,33(8):107-114.
[4]温庆志,王强.影响支撑剂长期导流能力的因素分析与探讨[J].内蒙古石油化工,2003,29(3):101-104.
[5]赵海峰,陈勉,金衍,等.页岩气藏网状裂缝系统的岩石断裂动力学[J].石油勘探与开发,2012,39(4):465-470.
[6]叶登胜,尹丛彬,蒋海,等.四川盆地南部页岩气藏大型水力压裂作业先导性试验[J].天然气工业,2011,31(4):48-50.
[7] ECONOMIDES M J,OLIGNEY R E,VALKO P.Unified acture Design[M].Texas:Orsa Press,2002.
[8] HOLDITCH S A,MORSE R A. The Effects of Non-Darcy Flow on the Behavior of Hydraulically Fractured Gas Wells[J]. Society of Petroleum Engineers. 1976,28(10):1169-1179.
[9] WHITAKER S. Flow in porous media:A theoretical derivation of.Darcys law[J]. Transport in Porous Media,1986,1(1):3-25.
[10] GEERTSMA J. Estimating the coefficient of inertial resestance in fluid flow through porous media[C].SPE445,1974.
[11] COOKE C E. Conductivity of fracture proppants in multiple layers[C].JPT1101,1973.
[12] REMERO D J,VALKO P P,ECONOMIDES M J. The optimization of the productivity index and the fracture geometry of a stimulated well with fracture face and choke skins[C].SPE 73758,2003.