西南石油大学学报(自然科学版) ›› 2000, Vol. 22 ›› Issue (1): 47-50.DOI: 10.3863/j.issn.1000-2634.2000.01.013

• 油气藏与钻采 • 上一篇    下一篇

煤层气有限导流压裂井的压力动态分析

陈伟1 段永刚2 谢军3

  

  1. 1.西南石油学院计算机科学系,四川 南充 637001; 2.西南石油学院完井技术中心; 3.四川石油管理局
  • 收稿日期:1999-03-09 修回日期:1900-01-01 出版日期:2000-02-20 发布日期:2000-02-20
  • 通讯作者: 陈伟

TRANSIENT PRESSURE ANALYSIS OF FINITE-CONDUCTIVITY FRACTURED WELL FOR COALBED METHANE

CHEN Wei1 DUAN Yong-gang2 XIE jun3
  

  1. Southwest Petroleum Inst
  • Received:1999-03-09 Revised:1900-01-01 Online:2000-02-20 Published:2000-02-20
  • Contact: CHEN Wei

摘要: 针对煤层气产出过程中的降压、解吸、扩散、渗流等特点,应用非稳态解吸模型;研究了煤层气在基质和割理中的单相流动;建立了新的有限导流压裂井评价模型;讨论了裂缝壁面表皮系数、吸附系数、裂缝储容系数和窜流系数对压力动态的影响;分析了煤层气压裂井的压降典型曲线特征和参数估计方法,从而为煤层气藏开发提供了可靠的数据。

关键词: 煤层气, 压裂井, 有限导流, 非稳态解吸模型, 动态分析

Abstract: Based on the characteristics of the pressure declining, desorption, diffusion and fluid flow in the process of coalbed methane from matrix of coal seam. Applying the non-equilibrium desorption methods in the paper, we studied the singlephase flow of coalbed methane in coal matrix and cleat, and es-
tablished a new evaluation model for finite conductivity fractured well of coalbed methane. The paper described the effect of the factors of fracture face damage skin, adsorption, fracture storage, and interporosity flow on transient pressure performance. Finally, the characteristics of typical curves for coalbed methane and parameter estimation were discussed. It gets the
reliable supports for coalbed methane reservoir development.

Key words: coalbed methane, fractured well, finite conductivity, non-equilibrium adsorption model, transient pressure analysis

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