[1]夏 彪,崔飞飞,孙 雷,等.X区块注CO2和N2提高反凝析油采收率机理研究[J].复杂油气藏,2013,(01):50.
　Xia Biao,Cui Feifei,Sun Li,et al.Study on mechanisms of enhanced condensate oil by CO2 and N2 gas injection in Block X[J].Complex Hydrocarbon Reservoirs,2013,(01):50.
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X区块注CO2和N2提高反凝析油采收率机理研究
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
期数:
2013年01期
页码:
50
栏目:
OA
出版日期:
2013-03-25

文章信息/Info

Title:
Study on mechanisms of enhanced condensate oil by CO2 and N2 gas injection in Block X
作者:
夏 彪1; 崔飞飞2; 孙 雷1; 卢 丽1; 侯大力1; 刘宇展1
1.西南石油大学,四川 成都 610500; 2.中国石油南方油田分公司,四川 成都 610500
Author(s):
Xia Biao; Cui Feifei; Sun Li; Lu Li; He Dali; Liu Yuzhan
(1.Southwest Petrleum University,Chengdu,Sichuan 610500; 2.South Oilfield Company,Petro China,Chengdu,Sichuan 610500)
关键词:
凝析气藏 相态分析 注CO2 注N2 配伍性 采收率
Keywords:
phase analysis;  condensate gas reservoir;  compatibility;  recovery
分类号:
TE327
摘要:
通过对X区块原始地层流体的相态分析,确定了该区块为近临界凝析气藏。该区块一直采用衰竭式开采方式,气藏原始地层压力为27 MPa,自开采以来至2012年8月地层压力下降为10 MPa,已低于露点压力,反凝析加剧,地层污染加重,并造成大量的凝析油损失。利用该凝析气田附近所具有的高纯CO2气藏气,探索注CO2气开发方式改善和提高凝析油气的采收率具有技术进步意义。通过对CO2和N2两种注入气与地层流体膨胀实验数据的对比研究,得到CO2与地层流体的增溶膨胀能力、混相能力等相态配伍性较好且优于N2。在CO2与目前地层凝析油混相能力研究中发现在19.3 MPa下CO2能与目前凝析油达到混相,CO2与目前地层凝析油容易达到混相,故开采时只要通过先期注CO2把目前地层压力提高至19.3 MPa以上,就可实现混相驱提高凝析油的采收率。
Abstract:
According to phase analysis of initial reservoir fluid collected from block X,it is confirmed that reservoirs in the block are near-critical condensate gas reservoirs.Depletion development is always used in the block.By the end of August 2012,the formation pressure decreased from initial reservoir pressure of 27 MPa to 10 MPa which is lower than dew point pressure.This condition results in increasing retrograde condensation and formation pollution,and loss of condensate oil.Therefore,it is necessary to enhance condensate oil recovery by using high-purity CO2 from gas reservoir in the vicinity of the block.By compared with CO2 and N2 swelling experiments,the capability of solubilization and swelling of CO2 is better than that of N2,and CO2 is easier to mix with formation fluid.For the target condensate oil,CO2 minimum miscible pressure is 19.3 MPa.Therefore,as long as the present formation pressure is increased to more than 19.3MPa by CO2 injection,CO2 miscible flooding can be reached to enhance condensate oil recovery.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2012-07-16; 改回日期:2012-08-26
作者简介:夏彪(1986—),在读硕士,现从事油气田开发实验和动态分析研究,电话:15184341550; E-mail:272519311@qq.com。
更新日期/Last Update: 2013-03-25