[1]雷 昊,马勇新,张 辉,等.乌石17-2低渗砂砾岩油藏水敏机理及 对油水两相渗流的影响[J].复杂油气藏,2017,(01):55.[doi:10.16181/j.cnki.fzyqc.2017.01.011]
　Lei Hao,Ma Yongxin,Zhang Hui,et al.Effect of water sensitivity on oil-water flow characteristics and its mechanism for WS17-2 low-permeability glutenite reservoir[J].Complex Hydrocarbon Reservoirs,2017,(01):55.[doi:10.16181/j.cnki.fzyqc.2017.01.011]
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乌石17-2低渗砂砾岩油藏水敏机理及 对油水两相渗流的影响
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
期数:
2017年01期
页码:
55
栏目:
油气开发
出版日期:
2017-03-25

文章信息/Info

Title:
Effect of water sensitivity on oil-water flow characteristics and its mechanism for WS17-2 low-permeability glutenite reservoir
作者:
雷 昊1; 马勇新1; 张 辉1; 赵 楠1; 罗 军2; 魏 瑾2
1.中海石油(中国)有限公司湛江分公司,广东 湛江 524057; 2.西南石油大学,四川 成都 610500
Author(s):
Lei Hao1; Ma Yongxin1; Zhang Hui1; Zhao Nan1; Luo Jun2; Wei Jin2
1.Zhanjiang Company of CNOOC(China)Co.,Ltd.,Zhanjiang 524057,China; 2.Southwest Petroleum University,Chengdu 610500,China
关键词:
砂砾岩油藏 水敏机理 油水相渗 渗流特征 水驱油效率
Keywords:
water-sensible sandy conglomerate reservoir;  water sensitivity mechanism;  oil/water relative permeability;  flow characteristics;  water displacement efficiency
分类号:
TE341
DOI:
10.16181/j.cnki.fzyqc.2017.01.011
文献标志码:
A
摘要:
通过水敏评价实验、高倍数水洗实验、水洗前后岩心核磁共振实验和一维水驱油实验,研究了乌石17-2油田流三段低渗砂砾岩油藏水敏机理及油水两相渗流特征。研究结果表明:储层岩心水敏严重,液相渗透率损失率高,水敏伤害主要发生在水驱早期; 水敏机理主要为粘土中的伊利石遇水时受剪切作用产生的颗粒剥离、脱落和运移引起的孔喉堵塞以及粘土矿物自身的水化膨胀作用,并以前者为主。受储层强水敏伤害和强非均质性影响,实验室注水压差较大,水驱油效率较低,两相共渗区较窄,水相相渗曲线始终“抬不起头”,无水采油期短,含水率上升快,提液效果差,两相渗流阻力大,水驱油效果较差。
Abstract:
Through water sensitivity evaluation experiment,large numbers of PV water flooded core experiment,core NMR experiment before and after waterflooding,and one-dimension water flooded core experiment,it was carried out study on the effect of water sensitivity on oil-water flow characteristics and its mechanism for the third member of Liu Formation in WS17-2 low-permeability glutenite reservoir.Experimental results showed that the reservoir core has serious water sensitivity and high loss rate of water permeability,and then the water sensitivity was occurred at the early stage of waterflooding.There are two main mechanisms of water sensitivity.One is the stripping,falling off,migration and plugging of illite particles under shearing action after contacting with water.The other is the hydration and swelling of clay minerals after contacting with water.The former is dominant.Because of the strong water sensitivity damage and severe heterogeneity,there are bigger injection pressure,lower water displacing oil efficiency,narrow oil-water simultaneous vadose region,water phase permeability curve without rising,shorter water-free production period,rapid water cut rising,poor extraction liquid effect,large two-phase percolating resistance,and bad water displacing oil efficiency.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-10-10; 改回日期:2016-11-17。
作者简介:雷昊(1979—),工程师,现从事油气田开发研究工作。电话:18688590929,E-mail:leihao@cnooc.com.cn。
基金项目:国家重大专项子课题《乌石凹陷低渗敏感性储层渗流机理及改善水驱动效果评价研究》(2016ZX05024006-005)资助。
更新日期/Last Update: 2017-03-25