Finite Conductivity Fracture を持つ坑井での坑井テスト解析新手法

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  • A New Approach for Well Test Analysis of Wells with Finite Conductivity Fractures.
  • New Approach for Well Test Analysis of Wells with Finite Conductivity Fractures

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Analyses of variable flow rate tests have been given special attention recently because it is generally impractical to keep a constant flow long enough in the field to perform a drawdown test, in addition to wellbore storage that affects early-time data in many situations. For fractured wells, this early-time period represents linear or bilinear flow in fractures. Thus, it is very important to devise a technique that would allow a petroleum engineer to obtain reservoir characteristics in addition to fracture characteristics such as fracture conductivity and fracture half-length, using this early flow data.<br>In this paper, a new analysis method is developed to describe drawdown and buildup tests for wells intersected by finite conductivity fractures. This new method utilizes the superposition method to arrive at a solution for downhole pressure versus time using simultaneously measured downhole pressure and sandface rates. Analysis based on the solution of this new method allows one to calculate directly both reservoir and fracture characteristics. Results obtained are verified by solving two field examples to demonstrate the model capabilities. A step-by-step procedure for analysis is also presented.

収録刊行物

  • 石油学会誌

    石油学会誌 44 (1), 1-10, 2001

    公益社団法人 石油学会

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