新疆石油地质

新疆石油地质 ›› 2005, Vol. 26 ›› Issue (5): 554-556.

• 油藏工程 • 上一篇    下一篇

求取压裂气井无阻流量的新方法

罗天雨1, 郭建春1, 赵金洲1, 陈朝刚1, 余先友2   

  1. 1.西南石油学院,成都610500;
    2.中国石油 塔里木油田分公司 勘探事业部,新疆库尔勒841000
  • 收稿日期:2005-01-11 出版日期:2005-10-01 发布日期:2020-11-23
  • 作者简介:罗天雨(1973-),男,河南方城人,在读博土研究生,油气田开发,(Tel)13540878587(E-mail)Ity293@163.com.
  • 基金资助:
    四川省青年科技基金项目,低渗透气藏支撑剂回流力学机理研究(04ZQ0026-052)

New Method for Absolute Open Flow of Gas Wells after Fracturing

LUO Tian-yu1, GUO Jian-chun1, ZHAO Jin-zhou1, CHEN Chao-gang1, YU Xian-you2   

  1. 1. Southwest Petroleum Institute, Chengdu, Sichuan 610500, China;
    2. Department of Exploration, Tanm Oilfield Company, PetroChina,Korla, Xinjiang 841000, China)Abstrnct: Based on the percolation theory of gas reservoirs after fracturing, considering the meaning and its infuence factor of cofficient“a", this paper suggests that taking ceofficient“a” as a conslant for gas well in some area with conventional radial flowing is reasonable.It mostly depends on the average terrestrial stress and permeability. However, for gas well after fracturing. the meaning of coeficient “x”is quite different for its tight relations to dimensionless conductivity of hydraulic fractures. W ithout considering this factor's influence, greater errors will occur. Taking Changqing gas field as an example, the corelation of value of“a” with the dimensionless conductivity is simulated. This method presents a new way for calculation of absolute open flow in gas wells after fracturing.;
  • Received:2005-01-11 Online:2005-10-01 Published:2020-11-23

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摘要： 从气藏的渗流机理出发,剖析求取无阻流量一点法中系数a的含义及其影响因素。结果表明,对于常规径向渗流气藏,在某区块内取a为近似常数是合理的,它主要与地层平均地应力和渗透率有关。但对于压裂后的气井,系数a的含义发生了较大变化,除了通常的影响因素外,它与压裂裂缝的无因次导流具有密不可分的关系,不考虑此因素的影响将产生较大的误差。在此理论分析的基础上,以长庆某气田为例,拟合了a值与无因次裂缝导流能力的关系式,为压裂后气井无阻流量的计算开拓了新的途径。

关键词: 压裂, 气井, 裂缝导流能力, 无阻流量

Abstract: Based on the percolation theory of gas reservoirs after fracturing, considering the meaning and its infuence factor of cofficient“a”, this paper suggests that taking ceofficient“a” as a conslant for gas well in some area with conventional radial flowing is reasonable.It mostly depends on the average terrestrial stress and permeability. However, for gas well after fracturing. the meaning of coeficient “x”is quite different for its tight relations to dimensionless conductivity of hydraulic fractures. W ithout considering this factor's influence, greater errors will occur. Taking Changqing gas field as an example, the corelation of value of“a” with the dimensionless conductivity is simulated. This method presents a new way for calculation of absolute open flow in gas wells after fracturing.

Key words: fracturing, gas well, fracture conductivity, absolute open flow

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