石油与天然气地质 ›› 2006, Vol. 27 ›› Issue (1): 124-130.doi: 10.11743/ogg20060110

• 开发地质与技术方法 • 上一篇    

多区不等厚横向非均质复合气藏试井分析模型及压力特征

付维署1, 何顺利2, 冉盈志3, 张广英4   

  1. 1. 中国石化,石油勘探开发研究院,北京,100083;
    2. 中国石油大学,北京,102200;
    3. 中国科学院,研究生院,北京,100039;
    4. 中国石化,江汉油田分公司,勘探开发研究院,湖北,潜江,433121
  • 收稿日期:2005-07-10 出版日期:2006-02-25 发布日期:2012-01-16

Well test analytical model and pressure characteristics of multizone, non-isopachous and lateral heterogeneous composite gas reservoirs

Fu Weishu1, He Shunli2, Ran Yingzhi3, Zhang Guangying4   

  1. 1. Exploration and Production Research Institute, SINOPEC, Beijing 100083, China;
    2. China University of Petroleum, Beijing 102200, China;
    3. Graduate School, Chinese Academy of Sciences, Beijing 100039, China;
    4. Exploration and Development Research Institute of Jianghan Oilfield Company, Qianjiang, Hubei 433121,China
  • Received:2005-07-10 Online:2006-02-25 Published:2012-01-16

PDF (PC)

778

被引次数

12

摘要：

针对长庆苏里格低渗气藏岩性发育不均匀、非均质性强的特点,建立了综合考虑表皮效应、井筒存储效应、气藏地层特性及地层厚度变化的多区不等厚横向非均质复合气藏试井解释模型,通过拉氏变换得出了无限大和封闭边界两种典型外边界条件下的气藏拟压力数值解,绘制了井底压降典型曲线,并对其压力动态特征进行了分析。利用该模型对苏里格气藏实际试井资料进行了解释,解释结果与实际生产动态情况较吻合。表明该模型对研究低渗透气藏储层特性有实用价值。

关键词: 不等厚, 非均质, 复合气藏, 不稳定试井, 模型, 压力

Abstract:

In view of the characteristics of uneven development of lithology and strong heterogeneity in Sulige low permeability gas reservoir of Changqing oilfield, a well test analytical model for multizone, non-isopachous and lateral heterogeneous composite gas reservoirs is established, which comprehensively takes into consideration the skin effect, wellbore storage effect, formation characteristics of gas reservoirs and variation of formation thickness. Laplace transformation is used to achieve the numerical solutions of reservoir pseudopressure under two typical outer boundary conditions, infinity and closed boundary, to plot the typical curve of bottom-hole pressure drawdown, and to analyze the pressure behavior characteristics. This model has been used to interpret the real well test data of Sulige gas reservoir, and the interpretation results are in good accordance with the actual production performance, indicating that it is practical for studying the characteristics of low permeability gas reservoirs.

Key words: non-isopach, heterogeneity, composite gas reservoir, transient well test, model, pressure

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