油气藏评价与开发 ›› 2019, Vol. 9 ›› Issue (2): 13-16.

• 油气藏评价 • 上一篇    下一篇

一种新型水驱特征曲线及其应用

李珂1,2,胡书勇3,张金庆1,2,朱国金1,2,周文胜1,2,耿艳宏1,2   

  1. 1. 中海石油研究总院海洋石油高效开发国家重点实验室,北京100028
    2. 中海石油研究总院有限责任公司,北京100028
    3. 西南石油大学油气藏地质及开发工程国家重点实验室,四川 成都610500
  • 收稿日期:2018-08-14 出版日期:2019-04-26 发布日期:2019-05-07
  • 作者简介:李珂(1980 —),男,博士,高级工程师,油气田开发。
  • 基金资助:
    国家科技重大专项"海上稠油油田开发模式研究"(2016ZX05025-001)

A new type water flooding characteristic curve and its application

Li Ke1,2,Hu Shuyong3,Zhang Jinqing1,2,Zhu Guojin1,2,Zhou Wensheng1,2,Geng Yanhong1,2   

  1. 1. State Key Laboratory of Offshore Oil Exploitation, CNOOC Research Institute, Beijing 100028, China
    2. CNOOC Research Institute Ltd., Beijing 100028, China
    3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2018-08-14 Online:2019-04-26 Published:2019-05-07

摘要:

目前常用的水驱曲线可以在中高含水期较好地表征水驱规律,由于以指数类相渗作为理论基础并在推导过程中进行了近似处理,此类水驱曲线难以描述低含水期或特高含水期的水驱规律,可能出现低含水期出现直线段较晚、高含水期上翘等情况,限制了该类曲线在实际中的应用。提出一种适用性更广的相渗形态表征式,并据此推导出一种新的水驱特征曲线。该水驱曲线可以描述不同含水阶段下的动态规律,并可通过拟合参数直接求取可采储量。实例应用表明,采用该新型水驱曲线进行拟合,直线段出现时间早、相关系数高、拟合效果好,在不同含水阶段均具有较好的适用性,能够更准确地描述水驱特征及方便地预测可采储量,在油田动态分析和生产策略制定中具有较好的应用价值。

关键词: 相对渗透率, 水驱特征曲线, 低含水期, 高含水期, 可采储量

Abstract:

The commonly used water flooding characteristic curves are suitable in describing the water flooding laws in the middle-high water cut periods. However, these curves can hardly describe the water flooding characteristics of low and high water cut periods because of their theoretical basis of exponential expression of relative permeability curves and approximation during the derivation process. The applications showed that, for different reservoir characteristics and the water cut rising features, the conventional water flooding curves mighe shew as no straight line in the low water cut period and raise in the high water cut period, which resulted in poor fitting effect. So we proposed a new type of water flooding characteristic curve based on a new kind of widely applicable expression of relative permeability curve. This new curve could accurately describe the production dynamic rules under different water cut stages and directly calculate the recoverable reserves by fitting parameters. Applications showed that, by this method, the fitting straight line appeard earlier, the correlation coefficient was high, and the fitting effect was good. It had good applicability in different water cut stages, could describe the characteristics of water flooding more accurately and could easily predict the recoverable reserves. There was good application value in the dynamic analysis and making the production strategy of oil fields.

Key words: relative permeability, water flooding characteristic curve, low water cut stage, high water cut stage, recoverable reserve

中图分类号: 

  • TE357