新疆石油地质

新疆石油地质 ›› 2011, Vol. 32 ›› Issue (1): 60-62.

• 油藏工程 • 上一篇    下一篇

底水油藏水平井临界产量计算新方法

程晓军1, 易斌1, 邓勇2, 李肃1, 朱猛1   

  1. 1.中国石化西北分公司塔河采油一厂,新疆轮台841600;
    2.中国石化西南分公司勘探开发研究院,成都610081
  • 收稿日期:2010-07-14 发布日期:2020-08-07
  • 作者简介:程晓军（1974-）,男,吉林辽源人,高级工程师,油气田开发,（Tel）0996-4688068（E-mail）dyswpi@126.com.
  • 基金资助:
    国家科技重大专项（2008ZX05-024-003-03）; 国家自然科学基金项目（10902093）

New Method for Calculation of Critical Production of Horizontal Well in Bottom Water Reservoir

CHENG Xiao-jun1, YI Bin1, DENG Yong2, LI Su1, ZHU Meng1   

  1. 1. Tahe No.1 Oil Production Plant, Northwest Branch, Sinopec, Luntai, Xinjiang 841600, China;
    2. Research Institute of Exploration and Development, Southwest Branch, Sinopec, Chengdu, Sichuan 610081, China
  • Received:2010-07-14 Published:2020-08-07

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摘要： 临界产量的确定是利用水平井开发底水油藏的关键。在分析水平井开采过程中底水锥进机理的基础上,将水平井三维渗流场近似分解为内、外两个渗流场。分别分析两个渗流场的流线分布,利用Dupuit公式得到外部渗流场临界产量计算公式;利用平面径向流原理,将水平段长度视为“油层厚度”,井眼与油层顶部距离视为“泄油半径”得到内部渗流场临界产量计算公式;结合等值渗流阻力原理得出底水油藏水平井临界产量计算新方法。据新方法进行实例分析,对比前人推导的不同方法的计算结果,分析各向异性、水平段长度以及水平段距油层顶界的垂向距离与油层厚度之比对临界产量的影响规律。

关键词: 底水油藏, 水平井, 底水锥进, 临界产量

Abstract: The key of using horizontal well to develop bottom water reservoir is to determine the critical production. Based on the analysis of water coning mechanism, the 3D percolation field of horizontal well is approximately divided into two parts including internal and external percolation fields. The two streamline distributions are analyzed. First, the Dupuit formula is used to get the formula of critical production for external field. Second, the horizontal length is taken as "reservoir thickness" and the distance between wellbore and reservoir top is taken as "drainage radius", and then the formula of critical production for internal field is given by using radial flow theory. Last, combining with the rule of equivalent filtrational resistance, a new method for calculation of the critical production of a horizontal well in bottom water reservoir is proposed. The case study is conducted and the comparisons among the different methods are presented. The effects of anisotropy, horizontal length and ratio of horizontal section's vertical distance and reservoir thickness on the critical production are analyzed.

Key words: bottom water reservior, horizontal well, bottom water coning, critical production

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