[1]张硕.低渗透油藏CO2气驱渗流机理核磁共振研究[J].深圳大学学报理工版,2009,26(3):228-233.
 ZHANG Shuo.NMR study on porous flow mechanisms in low permeability reservoirs with CO2 flooding[J].Journal of Shenzhen University Science and Engineering,2009,26(3):228-233.
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低渗透油藏CO2气驱渗流机理核磁共振研究()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第26卷
期数:
2009年3期
页码:
228-233
栏目:
环境与能源
出版日期:
2009-07-31

文章信息/Info

Title:
NMR study on porous flow mechanisms in low permeability reservoirs with CO2 flooding
文章编号:
1000-2618(2009)03-0228-06
作者:
张硕12
1)中国科学院渗流流体力学研究所,河北 廊坊 065007;
2)中国科学院研究生院物理学院,北京 100190
Author(s):
ZHANG Shuo12
1)Institute of Porous Flow& Fluid Mechanics,Chinese Academy of Sciences,Langfang 065007,Hebei,P.R.China
2)College of Physics Science,Groduate University of Chinese Academy  of Sciences,Beijing 100190,P.R.China
Keywords:
oil recoverymiscible gas floodinglow permeability reservoirnuclear magnetic resonance
分类号:
TB 302.1;TE 357
文献标志码:
A
摘要:
对超低渗透油藏和特低渗透油藏注入CO2开采,已成为提高原油采收率的重要技术手段之一.利用吉林油田超低渗透和特低渗透砂岩岩样,设计混相气驱、非混相气驱、高压水驱和低压水驱4种岩心注入工艺实验,采用核磁共振技术,从微观孔隙角度分析CO2混相气驱、非混相气驱和水驱渗流机理.研究表明:气驱驱走了岩心大部分大孔隙中的可动流体,并有一部分原油进入小孔隙成为不可动流体;相对非混相气驱,混相气驱可动流体的采出程度高是混相气驱提高采收率的根本原因;注采压差的提高,增加小孔隙中不可动流体的采出程度是基于混相气驱提高采收率的有效方法.气驱优于水驱,混相气驱优于非混相气驱.
Abstract:
For the reservoirs with ultra-low permeability and extra-low permeability, gas flooding is one of the important ways to improve oil recovery.Using sandsome core samples of Jinlin low permeability reservoirs and extra-low permeability reservoirs, core tests including miscible displacement, immiscible displacement, low pressure water displacement and high pressure water displacement were designed.Porous flow mechanisms based on CO2 miscible displacement,CO2 immiscible displacement and water displacement were analyzed by microcosmic angle of NMR.It shows that gas displacement results from most of movable fluid located in macro pores and small portion of crude oil enter small pores to become unmovable fluid; high recovery percents of movable fluid located in macro pores is a key reason for CO2 miscible displacement to enhance oil recovery.A effective way for enhancing oil recovery is based on CO2 miscible displacement to increase injection/production pressure difference and to improve recovery percentage of unmovable fluid located in small pores.Gas displacement is more effective than water displacement and miscible gas displacement is superior to immiscible gas displacement.

参考文献/References:


[1]张思富,贾忠盛,杜兴家,等.大庆油田注天然气非混相驱矿场试验研究[J].油气采收率技术,1998,5(4):31-35.
[2]李士伦,张正卿,冉新权,等.注气提高石油采收率技术[M].成都:四川科学技术出版社,2001:1-6.
[3]祝春生,程林松.低渗透油藏CO2驱提高原油采收率评价研究[J].钻采工艺,2007,6(30):55-60.
[4]Irina Brailovsky,Alexander Babchin,Michael Frankel,等.混相驱替中的不稳定指进衰减模型[J].物理快报A,2007,3(369):212-217(英文版).
[5]李海波, 朱巨义,郭和坤.核磁共振T2谱换算孔隙半径分布方法研究[J].波谱学杂志,2008,2(25):273-280.
[6]冯进,孙友.核磁共振测井T2截止值的确定方法[J].中国海上油气,2008,3(20):181-188.
[7]王为民,郭和坤,叶朝辉.利用核磁共振可动流体评价低渗透油田开发潜力[J].石油学报,2001,6(22):13-18.


[1]ZHANG Si-fu,JIA Zhong-sheng,DU Xing-jia,et al.Immiscible natural gas displacement field test in Daqing oilfield[J]. Oil & Gas Recovery Techinology,1998,5(4):31-35 (in Chinese).
[2]LI Shi-lun,ZHANG Zheng-qing,RAN Xin-quan,et al.The Technology of Gas Flooding to Enhanced Oil Recovery[M].Chengdu:Sichuan Science and Technology Publishing House,2001:1-6 (in Chinese).
[3]ZHU Chun-sheng,CHENG Lin-song.Research on CO2 flooding in low permeability reservoir[J] .Drilling and Production Technology,2007,6(30):55-60 (in Chinese).
[4]Irina Brailovsky,Alexander Babchin,Michael Frankel,et al.A reduced model for fingering instability in miscible displacement[J]. Physics Letters A,2007,3(369):212-217.
[5] LI Hai-bo,ZHU Ju-yi,GUO He-kun.Methods for calculating pore radius distribution in rock from NMR T2 spectra[J].Journal of Spectroscopy,2008,2(25):273-280(in Chinese).
[6]FENG Jin,SUN You.A method to determine T2 cutoff value in nuclear magnetic resonance log[J].Journal of Chinese Oil and Gas in Sea,2008,3(20):181-188(in Chinese).
[7]WANG Wei-min,GUO He-kun,YE Zhao-hui,et al.The Evaluation of development potential in low permeability oilfield by the aid of NMR movable fluid detecting technology [J].Acta Petrolei Sinica,2001,6(22):13-18(in Chinese).

备注/Memo

备注/Memo:
收稿日期:2009-05-24;修回日期:2009-07-15
基金项目:国家自然科学基金资助项目(10672187);中国石油天然气股份公司重点攻关项目(06-02/A-02-01)
作者简介:张硕(1979-)男(汉族),山东省潍坊市人,中国科学院博士研究生.E-mail:zs7sky@163.com
更新日期/Last Update: 2009-08-10