一种延缓交联凝胶的长岩心物模性能评价
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- 英文论文题名：Performance Evaluation on Physical Model of Long Core for A Delayed Crosslinking Gel
- 论文作者：吕杭
- 英文论文作者：Lv Hang
- 年：2016
- 作者机构：大庆油田有限责任公司采油工程研究院;
- 论文关键词：凝胶 ; 深部调剖 ; 延缓交联 ; 长岩心 ; 剪切 ; 成胶强度 ; 岩心吸附 ; 黏度损失
- 英文论文关键词：gel ; deep profile control ; delayed crosslinking ; long core ; shear ; gel strength ; core adsorption ; viscosity loss
- 会议召开时间：2016-12-01
- 会议录名称：《采油工程文集》2016年第4辑
- 英文会议录名称：Oil Production Engineering
- 语种：中文
- 分类号：TE39
- 学会代码：DQGY
- 学会名称：大庆油田有限责任公司采油工程研究院
- 页数：6
- 文件大小：1172k
- 原文格式：D
摘要
针对目前油田深部调剖的需要,研制出一种延缓交联的凝胶调剖剂体系,通过长岩心物模实验对其性能进行评价。研究结果表明:该凝胶调剖剂体系初始黏度低,在40mPa·s以内;低黏度周期长,10天内黏度在250mPa·s以内;25天后体系成胶强度2400mPa·s以上,且65天内基本保持不变,热稳定性良好。该凝胶调剖剂体系经1.2m长岩心两次剪切后,最终成胶强度可以达到1500mPa·s以上,且65天内强度基本不变,黏度损失率仅为37.5%,具有较好的深部调剖能力;该凝胶调剖剂体系经长岩心两次反复剪切后的凝胶蠕变恢复率为80%,且恢复应力百分比最低为5%,依然具有一定的形变恢复和抗压能力,说明该延缓交联的凝胶体系注入性能良好:该凝胶调剖剂体系经长岩心剪切后成胶强度大小是由Cr~(3+)的岩心吸附和聚合物剪切双方共同作用所决定的,虽然成胶强度有一定的损失,但依然可以保证成胶,且强度较强;体系的岩心封堵率达到96%以上,可以满足现场的封堵要求,为油田深部调剖提供了有效的技术保障。
According to the needs of deep profile control in oilfield presently,a delayed crosslinking gel profile control agent system has been developed,whose performance was evaluated by testing a long core physical model experiment.Research results showed that the gel control agent system has low initial viscosity of less than 40 mPa ? s.The low viscosity cycle was long,remaining within 250 mPa ? s in 10 days,and the gel strength reached higher than2400 mPa ? s after 25 days,which kept constant basically in 65 days with good thermal stability.After twice shearing in 1.2m long core,the final gel strength could still be higher than 1500 mPa ? s with unchanged strength in65 days,and the viscosity loss rate was only 37.5%with favorable deep profile control ability.Gel creep recovery rate of the gel profile control agent system was 80%after twice shearing,and the lowest recovery stress percentage rate was 5%with a certain deformation recovery and compressive capacity.It is indicated that the delayed crosslinking gel system has a good injection performance.The gel strength value of the gel profile control agent system after shearing in long core is dependent on the combined action of both the adsorption on the core of Cr3+ and shear force of polymer,although a certain loss in the gel strength,which still has gelling action with relatively strong gel strength.The core plugging rate of the gel system is above 96%,which can meet the requirement of plugging operation in the field application.The system provides effective technical supports for deep profile control in oilfield.
According to the needs of deep profile control in oilfield presently,a delayed crosslinking gel profile control agent system has been developed,whose performance was evaluated by testing a long core physical model experiment.Research results showed that the gel control agent system has low initial viscosity of less than 40 mPa ? s.The low viscosity cycle was long,remaining within 250 mPa ? s in 10 days,and the gel strength reached higher than2400 mPa ? s after 25 days,which kept constant basically in 65 days with good thermal stability.After twice shearing in 1.2m long core,the final gel strength could still be higher than 1500 mPa ? s with unchanged strength in65 days,and the viscosity loss rate was only 37.5%with favorable deep profile control ability.Gel creep recovery rate of the gel profile control agent system was 80%after twice shearing,and the lowest recovery stress percentage rate was 5%with a certain deformation recovery and compressive capacity.It is indicated that the delayed crosslinking gel system has a good injection performance.The gel strength value of the gel profile control agent system after shearing in long core is dependent on the combined action of both the adsorption on the core of Cr3+ and shear force of polymer,although a certain loss in the gel strength,which still has gelling action with relatively strong gel strength.The core plugging rate of the gel system is above 96%,which can meet the requirement of plugging operation in the field application.The system provides effective technical supports for deep profile control in oilfield.
引文
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[2]宋才娃,郑松玉,隋晓滨.低渗透油田中高含水期聚合物深度调剖效果[J].大庆石油地质与开发,2000,19(5):53-54.
[3]刘一江,刘积松,李琇富.预交联凝胶微粒在深度调剖中的应用[J].油气地质与采收率,2001,8(3):65-66.
[4]陈福明,牛金刚,王加滢,等.低浓度交联聚合物深度调剖技术研究[J].大庆石油地质与开发,2001,20(2):66-68.
[5]白宝君,李宇乡,刘翔鄂.国内外化学堵水调剖技术综述[J].断块油气田,1998,5(1):1-5.
[6]周望,谢朝阳,陈凤.大庆油田化学堵水调剖技术的发展与应用[J].大庆石油地质与开发,1998,17(3):32-35.
[7]Daniel Broseta,Oliver Marquer,Pascal Baylocq,et al.Gel treatment optimization by rheological measurements[C].SPE International Symposium on Oilfield Chemistry,16-19 February,1999.
[8]陈龙,于立新,史磊,等.改性酚醛树脂凝胶调剖体系在中温地层的应用[J].石油钻采工艺,2013,35(2):103-105.
[9]皮彦夫.石英砂环氧树脂胶结人造岩心的技术与应用[J].科学技术与工程,2010,10(28):6998-7000.
[10]徐洪波,刘莉,李建阁.大庆油田砂岩人造岩心制作方法[J].科学技术与工程,2011,11(30):7344-7348.
[11]盖德林,陈玲玲,韩玉玲.一种降低体膨颗粒注入端效应的岩心评价方法[G]∥大庆油田有限责任公司采油工程研究院,采油工程文集2012年第2辑,北京:石油工业出版社,2012:64-66.
[12]岳湘安,侯吉瑞,邱茂君,等.聚合物凝胶颗粒调剖特性评价[J].油气地质与采收率,2006,13(2):81-84.