水驱优势通道下微观潜力分布及改变流线挖潜

doi:10.11885/j.issn.16745086.2015.08.28.01

西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (5): 92-100.DOI: 10.11885/j.issn.16745086.2015.08.28.01

水驱优势通道下微观潜力分布及改变流线挖潜

肖康^1,2, 穆龙新¹, 姜汉桥², 李威³

1. 中国石油勘探开发研究院, 北京海淀 100083;
2. 中国石油大学(北京)石油工程学院, 北京昌平 102249;
3. 中海油深圳分公司, 广东广州 510240

收稿日期:2015-08-28 出版日期:2017-10-01 发布日期:2017-10-01
作者简介:肖康,1987年生,男,汉族,河北任丘人,工程师,博士,主要从事高含水油田调整及油藏数值模拟等研究。E-mail:xiaokang870224@163.com;穆龙新,1960年生,男,汉族,陕西汉中人,教授级高级工程师,主要从事海外油气田勘探开发综合研究与管理工作。E-mail:mlx@petrochina.com.cn;姜汉桥,1957年生,男,汉族,江苏海门人,教授,博士生导师,主要从事油气田开发理论与系统工程方面的研究。E-mail:jhqlf@163.com;李威,1989年生,男,汉族,湖北仙桃人,硕士,主要从事油气田开发和油藏工程的研究。E-mail:735999619@qq.com
基金资助:
国家科技重大专项（2011ZX05030）；中国石油科技项目（2016D-4401）

Microscopic Distribution of Potentially Recoverable Oil During the Waterflooding of Preferential Petroleum Migration Pathways and Enhanced Oil Recovery Through Streamline Alteration

XIAO Kang^1,2, MU Longxin¹, JAING Hanqiao², LI Wei³

1. PetroChina Research Institute of Petroleum Exploration & Development, Haidian, Beijing 100083, China;
2. Faculty of Petroleum Engineering, China University of Petroleum(Beijing), Changping, Beijing 102249, China;
3. Shenzhen Branch, CNOOC, Guangzhou, Guangdong 510240, China

Received:2015-08-28 Online:2017-10-01 Published:2017-10-01
Contact: 肖康,E-mail:xiaokang870224@163.com

摘要/Abstract

摘要： 根据中高渗油藏优势通道孔喉分布特征，建立了具有不同优势通道发育规模的二维刻蚀模型，对优势通道下剩余油微观分布及演变特征进行了研究；通过分析不同改变流线动用方法适应性，初步揭示了优势通道下剩余油改变流线动用机制；结合油藏数值模拟，量化了改变流线动用策略。结果表明，提高驱替速度可使弱优势通道下剩余油大幅降低，而强优势通道变化较小；根据优势通道下剩余油赋存形态、形成机制，将其分成了4类，即死角式、并联式、包围式、绕流式，其中前两类受优势通道规模、驱替速度影响极小，而后两类仅在优势通道规模较小时，才会随驱替速度增加而大幅减小。应以利用与克服优势通道的角度去设计流线动用改变方式，在流线动用方式合理改变时，强优势通道注采比应适当降低，而弱优势通道相反。

关键词: 水驱, 优势孔道, 剩余油, 流线动用, 模拟

Abstract: Two-dimensional etching models were constructed with varying levels of preferential petroleum migration pathway (PPMP) development based on the pore-throat distribution characteristics of PPMPs in mid-to-high permeability reservoirs, for studies on the microscopic distribution of residual oil in PPMPs and their evolutionary characteristics. By analyzing the adaptability of different methods for altering streamline mobilization, we have taken the first steps towards revealing the mechanism of streamline mobilization alterations in the residual oils of PPMPs. We also quantified strategies for altering streamline mobilization via numerical simulations of oil reservoirs. The results indicate that increases in displacement speed can greatly reduce the quantity of residual oil in weakly preferred migration pathways, whereas the changes that occurred in strongly preferred migration pathways were relatively minute. The residual oils in PPMPs were divided into four types according to the morphology of their storage and formative mechanisms, namely, dead angle types, parallel types, enveloping types, and circumfluent types. The first two types were almost completely unaffected by the scale of PPMPs and displacement speed, whereas the two latter types showed significant decreases with increases in displacement speed if the PPMPs are relatively small in scale. Methods for altering streamline mobilization should be designed to overcome preferential pathways. When the appropriate alterations are made in streamline mobilization methods, the injection-production ratio of strongly preferred pathways should be suitably decreased, and the reverse should occur for weakly preferred pathways.

Key words: waterflooding, preferential petroleum migration pathways, residual oil, streamline mobilization, simulations

中图分类号:

TE341

肖康, 穆龙新, 姜汉桥, 李威. 水驱优势通道下微观潜力分布及改变流线挖潜[J]. 西南石油大学学报(自然科学版), 2017, 39(5): 92-100.

XIAO Kang, MU Longxin, JAING Hanqiao, LI Wei. Microscopic Distribution of Potentially Recoverable Oil During the Waterflooding of Preferential Petroleum Migration Pathways and Enhanced Oil Recovery Through Streamline Alteration[J]. 西南石油大学学报(自然科学版), 2017, 39(5): 92-100.

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水驱优势通道下微观潜力分布及改变流线挖潜

Microscopic Distribution of Potentially Recoverable Oil During the Waterflooding of Preferential Petroleum Migration Pathways and Enhanced Oil Recovery Through Streamline Alteration

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