水驱转CO2混相驱渗流机理及传质特征

doi:10.7623/syxb201802008

石油学报 ›› 2018, Vol. 39 ›› Issue (2): 201-207.DOI: 10.7623/syxb201802008

水驱转CO₂混相驱渗流机理及传质特征

胡伟^1,2,3, 吕成远^1,2, 王锐^1,2, 崔茂蕾^1,2, 杨阳^1,2, 王欣^1,2

1. 中国石油化工集团公司海相油气藏开发重点实验室北京 100083;
2. 中国石油化工股份有限公司石油勘探开发研究院提高采收率技术研究所北京 100083;
3. 中国石油大学博士后科研流动站北京 102249

收稿日期:2017-05-27 修回日期:2017-11-14 出版日期:2018-02-25 发布日期:2018-03-09
通讯作者: 胡伟,男,1988年1月生,2010年获长江大学学士学位,2016年获中国石油大学(北京)博士学位,现为中国石油化工股份有限公司石油勘探开发研究院博士后,主要从事油气渗流理论和油气相态方面研究。Email:huwei.syky@sinopec.com
作者简介:胡伟,男,1988年1月生,2010年获长江大学学士学位,2016年获中国石油大学(北京)博士学位,现为中国石油化工股份有限公司石油勘探开发研究院博士后,主要从事油气渗流理论和油气相态方面研究。Email:huwei.syky@sinopec.com
基金资助:
国家重大科技专项"鄂尔多斯盆地致密低渗油气藏注气提高采收率技术"（2016ZX05048-003）资助。

Porous flow mechanisms and mass transfer characteristics of CO₂ miscible flooding after water flooding

Hu Wei^1,2,3, Lü Chengyuan^1,2, Wang Rui^1,2, Cui Maolei^1,2, Yang Yang^1,2, Wang Xin^1,2

1. Sinopec Key Laboratory of Marine Oil & Gas Reservoirs Production, Beijing 100083, China;
2. Department of Enhanced Oil Recovery, Sinopec Petroleum Exploration and Production Research Institute, Beijing 100083, China;
3. Postdoctoral Mobile Research Station, China University of Petroleum, Beijing 102249, China

Received:2017-05-27 Revised:2017-11-14 Online:2018-02-25 Published:2018-03-09

摘要/Abstract

摘要： CO₂混相驱作为三次采油技术一般在注水开发之后实施，其需要考虑水驱后残留在孔隙中的注入水对CO₂混相驱的影响。基于常规PVT多次接触实验，采用带多点取样孔的长填砂管，在不同含水阶段分别开展注气驱替实验和气水交替驱实验，研究多孔介质中可动水参与下的多相多组分渗流规律以及不同含水率对油、气两相组分传质的影响。研究结果表明：在不同含水率下CO₂与原油仍能发生混相，CO₂的注入形成了新的渗流通道，扩大了水驱波及体积。但高含水率对油相和气相间组分传质有一定的抑制作用。此外，不同含水率下转CO₂驱会在储层中形成不同的油、气、水三相渗流和分布特征，从而影响采出程度，而气驱最终采收率主要受注气驱油效率和水驱波及体积共同作用的影响。

关键词: 多相多组分, 混相, 相间传质, 含水率, 气水交替

Abstract: As a tertiary oil recovery technology, CO₂ miscrible flooding is generally implemented after water flooding, so that it is required to consider the impact of remaining injected water on CO₂ miscible flooding after water flooding. Based on the conventional PVT multiple-contact experiment, the long sand-filling tube with multi-point sampling holes was used to analyze the multi-phase and multi-component flow mechanisms in porous media and explore the influences of different water cut on the mass transfer of oil and gas through the gas injection and water alternating gas (WAG)injection experiments under different water cut stages. The experimental results show that CO₂ and crude oil can still be miscible at different water cut, and the CO₂ injection can open a new kind of flow channel to expand water flooding volume. However, the high water cut has a certain inhibitory effect on oil and gas mass transfer. Moreover, the conversion to CO₂ flooding at different water contents will lead to different flow and distribution characteristics of oil, water and gas in reservoir. The final recovery efficiency of gas flooding is mainly jointly affected by gas flooding efficiency and water flooding volume.

Key words: multi-phase and multi-component, miscible phase, mass transfer, water cut, water alternating gas

中图分类号:

TE341

胡伟, 吕成远, 王锐, 崔茂蕾, 杨阳, 王欣. 水驱转CO₂混相驱渗流机理及传质特征[J]. 石油学报, 2018, 39(2): 201-207.

Hu Wei, Lü Chengyuan, Wang Rui, Cui Maolei, Yang Yang, Wang Xin. Porous flow mechanisms and mass transfer characteristics of CO₂ miscible flooding after water flooding[J]. Acta Petrolei Sinica, 2018, 39(2): 201-207.

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水驱转CO₂混相驱渗流机理及传质特征

Porous flow mechanisms and mass transfer characteristics of CO₂ miscible flooding after water flooding

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