第38卷第4期 2016年7月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：1000-7393（2016)04-049405
DOI: 10.13639/j.odpt.2016.04.017
Vol. 38 No. 4 July 2016
聚合物驱后注气稳定重力复合驱数值模拟
高明1-2王强1.2马德胜1.2刘朝霞1.2刘皖露1.2 1.提高石油来收单国家重点实验宝；2.中国石油勘探开发研究院
引用格式：高明，王强，马德胜，刘朝霞，刘皖露.聚合物驱后注气稳定重力复合驱数值模拟[』1石油钻采工艺，2016，384)： 494-498.
摘要：聚合物驱后剧余油分布高度零散、顶部油层剥余油难以动用，而聚驱后的主导技术尚无明确方法。在原油受力分析的基础上，提出了油藏预部注气、底部三元复合驱的思路。针对大庆聚合物驱后区块，进行了不同驱替方式的预测对比研究结聚表明，注气稳定重力复合驱效果最好，提高采收率幅度达到了13.53%。对比不同驱替方式的项部油层剧余油饱和度，注气稳定重力复合驱能够将顶项部低渗造油层有效动用，剩余油大幅减少。分析不同时间点的纵向刺余油饱和度分布，项部注气后利用纵向压差驱替刺余油向下适移，底部实施三元复合驱利用平面压差驱替刺余油，实现了立体驱替。注气稳定重力复合驱技术为聚驱后提高采收率技术的发展提供了新恩路。
关键词：聚合物驱后；注气稳定重力复合驱；数值模拟；剩余油分布
中图分类号：TE357
文献标识码：A
Numerical simulation of gas injection for stable gravity flooding after polymer flooding
1. State Kay Laborafory of Enhanced Oil Recovery, Bejing 100083, China
2. Research Institute of Pefroleum Exploration and Developmenr, Bejing 100083, China
Citation: GAO Ming, WANG Qiang, MA Desheng, LIU Zhaoxia, LIU Wanlu. Numerical simulation of gas injection for stablc gravity flooding after polymer flooding [ J] . Oil Drilling & Production Technology, 2016, 38(4): 494-498
Abstraet: Residual oil after polymer flooding is very scattered, and residual oil in top sections of reservoir formations is extremely difficult to develop, yet there is no prevailing technology suitable for development after polymer flooding. Based on analysis of stress on crude oil, the idea of injecting gas at the top section of the reservoir and conducting ASP flooding in bottom section has been proposed in ooao aee oaos aaadaaaeaoaaoedara eoaade s The research results show gas injection for stable gravity flooding has the best performance, with a EOR increment of 13.53%. Compar ing residual oil saturation obtained through application of different displacement modes, gas injection for stable gravity flooding can effectively develop low-permeability formations in the top section and reduce residual oil significantly. Vertical distribution of residual oil saturation at different time points was analyzed. After gas injection in the top section, differential pressure in vertical direction may drive residual oil to migrate downward, while ASP flooding conducted in bottom section may drive residual oil by horizontal differen-tial pressure, thus realizing 3-dimensional flooding. Gas injcction for stable gravity flooding may provide a viable option for EOR after polymer flooding.
Key words: after polymer flooding; gas injection for stable gravity flooding; numerical simulation; residual oil distribution
开发研究院超前储务研究项目（编号：2015yj-03)。
第一作者：高明（1980-),博士，主委从事油气田开发方面的研究工作，工程师。通试地址：(100083)北京市海淀区学院路20号中国石润
勘深开发研究院采收率所。E-mail；gaomingo010@petrochina.com.cn