西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

基于产出气密度的富气驱气/水交替注入新方法

王生奎1,2 *,张卫东3,袁向春1,魏旭光3,蔡茂佳4   

  1. 1. 中国石化石油勘探开发研究院博士后工作站,北京海淀100083
    2. 中国石油大学(北京)博士后流动站,北京昌平102249
    3. 中国石化国际石油勘探开发有限公司,北京朝阳100101
    4. 中国石油大港油田分公司勘探公司,天津大港300280
  • 出版日期:2016-06-01 发布日期:2016-06-01
  • 通讯作者: 王生奎,E-mail:skwang.sipc@sinopec.com

New WAG Injection Model Based on the Produced Gas Density#br# Variation for Enriched-gas Flooding

WANG Shengkui1,2*, ZHANG Weidong3, YUAN Xiangchun1, WEI Xuguang3, CAI Maojia4   

  1. 1. Post-doctoral Research Station,SINOPEC E&P Research Institute,Haidian,Beijing 100083,China
    2. Post-doctoral Research Station,China University of Petroleum(Beijing),Changping,Beijing 102249,China
    3. SINOPEC International Petroleum E&P Corporation,Chaoyang,Beijing 100101,China
    4. Exploration Branch,Dagang Oilfield Company,PetroChina,Dagang,Tianjin 300280,China
  • Online:2016-06-01 Published:2016-06-01

摘要:

目前文献报道的各类气/水交替(WAG)注入方法中,采用采收率、TRF(Tertiary recovery factor)、累计净现金流
及NPV 等常用指标来优化段塞方案时经常会得出不同结论,其实质是该类WAG 设计方法本身就忽略了注入气与波
及区剩余油的定量关系。通过富气驱过程中产出气密度变化规律研究,提出了一种高效的富气驱WAG 注入新方法,
即EWAG(Efficiency WAG)定量优化设计各WAG 周期的气段塞、水段塞及WAG 总周期数。在M 油田算例研究中,
与几种常用的WAG 注入方法相比较,EWAG 在采收率、TRF、液化气回采率及累计净现金流等指标上均优势明显。

关键词: 富气驱, 凝析, 产出气密度, 驱替效率, EWAG

Abstract:

When using the WAG models proposed in the literatures,different slug conclusions are obtained by using common
indexes such as oil recovery,TRF,cumulative net cash flow and NPV. The reason is that the WAG design method has
neglected the quantitative relationship between the injected enriched-gas volume and the amount of remaining oil in the swept
region. In this paper,an efficient optimization and design method is proposed and developed for water-alternating-gas injection
model(EWAG)injection process. The proposed technique is able to quantitatively determine the sizes of the enriched-gas slug
and water slug for each cycle of the water-alternating-gas(WAG),as well as the total number of injection cycles. Applying this
method provides this opportunity to implement the WAG scenario more efficiently and economically. The numerical simulation
showed that in comparison with other conventional WAG scenarios with traditional optimization approaches,the EWAG has
the obvious advantages of evaluation indices,such as the oil recovery factor and cumulative net cash flow.

Key words: enriched-gas flooding, condensate, produced gas density, displacement efficiency, EWAG

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