新疆石油地质

新疆石油地质 ›› 2011, Vol. 32 ›› Issue (6): 630-633.

• 油藏工程 • 上一篇    下一篇

底水气藏水平井临界生产压差变化规律

吴克柳1, 李相方1, 韩易龙1,2, 赵晶晶1   

  1. 1.中国石油大学石油工程教育部重点实验室,北京 102249;
    2.中国石油塔里木油田分公司,新疆库尔勒 841000
  • 收稿日期:2011-03-21 出版日期:2011-12-01 发布日期:2020-08-20
  • 作者简介:吴克柳（1985-）,男,福建三明人,在读博士研究生,石油工程,（Tel）010-89732193（E-mail）wukeliu19850109@163.com.
  • 基金资助:
    国家自然科学基金项目（50974128）

Variation of Critical Producing Pressure Differential of Horizontal Well in Gas Reservoir with Bottom Water

WU Ke-liu1, LI Xiang-fang1, HAN Yi-long1,2, ZHAO Jing-jing1   

  1. 1. MOE Key Laboratory for Petroleum Engineering, China University of Petroleum, Beijing 102249, China;
    2. Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
  • Received:2011-03-21 Online:2011-12-01 Published:2020-08-20

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摘要： 根据物质平衡原理,推导底水气藏的含气高度、含水高度随时间的变化关系,并用近似方法确定波及系数,然后采用等值渗流阻力法,结合底水驱动垂向临界速度推导底水气藏开发的临界生产压差计算模型,从而实现定量表达水平井临界生产压差随开采时间增加而呈现递减趋势的变化规律。此外,分析垂向渗透率与水平渗透率之比、水气密度差、水气黏度比以及底水锥进高度等参数对临界生产压差的影响,为水平井开发底水气藏确定合理的生产压差、制定合理产量提供理论依据。

关键词: 底水气藏, 临界生产压差, 水平井, 含气高度, 采收率

Abstract: Using material balance principle, gas-bearing height and water-bearing height variations in bottom-water reservoir with time are deduced, and the sweep efficiency is approximately determined. Then, based on the equivalent flowing resistance method and vertical critical velocity of bottom water drive, the computational model for critical producing pressure differential for development of gas reservoir with bottom water is derived. Therefore, the variation of decline trend when quantitatively expressing the increase of critical producing pressure differential of horizontal well with time is clarified. Moreover, this paper analyzes the influences of ratio between vertical permeability and horizontal permeability, the difference between water and gas density, the ratio of water to gas viscosity and height of bottom water coning on the critical producing pressure differential. The results could provide theoretical basis for determination of reasonable producing pressure differential and producing rate by horizontal well development of gas reservoir with bottom water.

Key words: bottom-water gas reservoir, critical producing pressure differetial, horizontal well, gas bearing height, recovery efficiency

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