第46卷第4期
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
X油藏注气混相驱可行性实验研究
李轶超姚先荣”王长权”代宸宇1杨琳琳 1.中国石油大学（北京）2.中国石油川庆钻探工程公司3.长江大学
摘要针对X底水油藏油井注水后综合含水上升过快的问题，利用HB70/300型高压物性分析仪开展了该区块原油相态特征实验、注气相态特征实验，并运用细管法开展了注CO2最小混相压力实验。对比分析了CO2和N2两种性质气体注入前后原油的相态特征变化，确定了该区块原油注CO2最小混相压力，为X油藏注气提高采收率可行性提出依据。实验结果表明，X油藏原始地层压力为46.01 MPa，原油饱和压力为11.06MPa，注N2后饱和压力上升迅速，在原始地层条件下难以实现混相，表现出典型的非混相特征；注C02后饱和压力上升较平缓，细管法测得的最小混相压力为28.03MPa，说明利用CO2可实现CO2的混相驱替，而且最终的驱替效果比较理想。说明该油藏可开展注CO2混相驱，为进一步的开发方案调整提供了依据和合理的建议。
关键词NCO饱和压力混相驱替
中图分类号：TE357.45
文献标志码：A
D0I:10.3969/i.issn.1007-3426.2017.04.012
Feasibility experimental research onmiscibleflooding
ofXreservoirbygasinjection
LiYichao',Yao Xianrong,Wang Changquan,Dai Chenyu',Yang Linlin
1. Chinese University of Petroleum, Beijing, China; 2. CNPC Chuanging Drilling and Exploration Engineering Company Ltd, Chengdu, Sichuan, China; 3.Yangtze Uniuersity , Jingzhou, Hubei,Chind
Abstract: In order to solve the problem that the comprehensive water cut is rising too fast after water injection in X reservoir , the research has been carried out in this paper . Experiments on phase behavior of crude oil and phase behavior experiments of gas injection have been carried out by using HB70/300 high pressure physical properties analyzer . The minimum miscibility pressure of CO2 injection has been carried out by using thin tube method . The phase behavior of crude oil has been analyzed before and after N2 or CO2 injection . In this paper , the minimum miscible pressure of crude oil for CO2 injection is determined , which provides basis for EOR of X reservoir . These experiments showed that the original pressure of X reservoir is 46 .01 MPa, the saturation pressure of crude oil is 1l .06 MPa,which can hardly get miscible flooding by N injection because the saturation pressure will rise quickly. The saturation pressure will rise gently for CO 2 . The minimum miscibility pressure measured by the thin tube method is 28.03 MPa, indicating that miscible flooding by CO injection can be achieved . And the ultimate displacement effect is ideal . The reservoir can be injected with CO miscible flooding , which provide a basis and reasonable suggestions for adjusting development plan .
Key words : nitrogen carbon dioxide ,saturation pressure , miscible flooding
63
基金项目：国家自然科学基金“高温高压C0:-原油-地层水三相相平衡溶解度规律”（51404037）；全国大学生创新训练项目“二氧化碳驱油效果实验评价"（104892013009）。
作者简仓薪轶超（1992一），硕士研究生，主要从事油气藏工程及注气提高油气采收率等相关研究工作。E-mail：1107238639@
芳芳数据
qq-com,