新型低伤害聚合物压裂液的性能研究及评价
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- 英文论文题名：Study and Evaluation on the Performance of New Polymer Fracturing Fluid with Low Damage
- 论文作者：李君 ; 王珂昕 ; 曹辉辉 ; 郑奕璇 ; 徐伟
- 英文论文作者：Li Jun ; Wang Kexin ; Cao Huihui
- 年：2016
- 作者机构：大庆油田有限责任公司井下作业分公司;辽宁石油化工大学;
- 论文关键词：低伤害 ; 聚合物 ; 压裂液 ; 助排剂 ; 破乳剂 ; 交联剂
- 英文论文关键词：low damage ; polymer ; fracturing fluid ; cleanup additive ; demulsifier ; crosslinking agent
- 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：TE357.12
- 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：5
- 文件大小：978k
- 原文格式：D
摘要
针对目前水溶性聚合物压裂液不耐温、剪切稳定性差及植物胶压裂液成本高等问题,研究开发了一种新型的低伤害聚合物压裂液体系。新型低伤害聚合物压裂液体系在40~90℃之间的配方为:WH924聚合物+助排剂JX-D+破乳剂A+交联剂DZ-2,对配方进行性能评价,结果表明:在40℃、60℃、80℃、90℃剪切时间为30~60min,黏度值仍保持在60mPa·s以上。配方中加入一定量的破胶剂B,在40~90℃时破胶效果良好,残渣含量为64~76 mg/L;破胶水化液表面张力在28mN/m以下、界面张力在2mN/m以下。压裂液滤失性能良好,45℃配方岩心伤害率为8%,90℃配方岩心伤害率为12.5%,说明新型低伤害聚合物压裂液对储层伤害率小。该聚合物压裂液体系在现场试验26口井,压裂增产效果良好,经过试验确定该压裂液体系适合用于渗透率不大于420mD的储层。新型低伤害聚合物压裂液的成功研制,解决了植物胶压裂液成本高的问题,为大庆低渗透油田储层压裂改造提供了技术支持和保障。
Due to the current water soluble polymer fracturing fluid being not resistant to high temperature,poor shear stability and high cost of vegetable gum fracturing fluid,a new fracturing fluid system with low damage has been developed.The formula of new polymer fluid system that being used between 40℃ and 90℃ includes WH924 polymer,cleanup additive JX-D,demulsifier A,and crosslinking agent DZ-2.The performance evaluation on its formula showed that the viscosity could be kept above 60 mPa ? s after shearing for 30 to 60 minutes at temperature40℃,60℃,80℃,90℃ respectively.When a certain amount of gel breaker B was added in the formula,the gel breaking effect was good at 40 to 901,and the residue content was 64~76 mg/L.The surface tension of gel breaker solution was less than 28 mN/m,and the interfacial tension was below 2 mN/m.The filtration of fracturing fluid performed very well,e.g.the core damage rate of the formula was 8%at 45℃ and 12.5%at 90℃respectively,which means that the new polymer fracturing fluid with low damage has little damage to the reservoir.The polymer fracturing fluid system has been applied to 26 wells with satisfying stimulation effect,which is suitable for the reservoir with permeability less than 420 mD.The successful development of the new polymer fracturing fluid with low damage can solve the high cost problem of vegetable gum fracturing fluid,and provide the technical support and guarantee for fracturing stimulation of low permeability oil reservoir in Daqing.
Due to the current water soluble polymer fracturing fluid being not resistant to high temperature,poor shear stability and high cost of vegetable gum fracturing fluid,a new fracturing fluid system with low damage has been developed.The formula of new polymer fluid system that being used between 40℃ and 90℃ includes WH924 polymer,cleanup additive JX-D,demulsifier A,and crosslinking agent DZ-2.The performance evaluation on its formula showed that the viscosity could be kept above 60 mPa ? s after shearing for 30 to 60 minutes at temperature40℃,60℃,80℃,90℃ respectively.When a certain amount of gel breaker B was added in the formula,the gel breaking effect was good at 40 to 901,and the residue content was 64~76 mg/L.The surface tension of gel breaker solution was less than 28 mN/m,and the interfacial tension was below 2 mN/m.The filtration of fracturing fluid performed very well,e.g.the core damage rate of the formula was 8%at 45℃ and 12.5%at 90℃respectively,which means that the new polymer fracturing fluid with low damage has little damage to the reservoir.The polymer fracturing fluid system has been applied to 26 wells with satisfying stimulation effect,which is suitable for the reservoir with permeability less than 420 mD.The successful development of the new polymer fracturing fluid with low damage can solve the high cost problem of vegetable gum fracturing fluid,and provide the technical support and guarantee for fracturing stimulation of low permeability oil reservoir in Daqing.
引文
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[2]刘花,李志远,邵茂华.一种新型聚合物压裂液的室内实验研究[G]//大庆油田有限责任公司采油工程研究院.采油工程文集2013年第2辑.北京:石油工业出版社,2013:19-23.
[3]肖丹凤,韩露,孙建国,等.聚合物压裂液在大庆低渗透储层的应用[J].油田化学,2009,26(2):131-133.
[4]姜汉桥,王长江,郭虎,等.低渗透油藏水力压裂优化设计方法[J].大庆石油地质与开发,2010,29(2):92-96.
[5]张汝生,卢拥军,舒玉华,等.一种新型低伤害合成聚合物冻胶压裂液体系[J].油田化学,2005,22(2):44-47.
[6]杨振周,陈勉,胥云,等.新型合成聚合物超高温压裂液体系[J].钻井液与完井液,2011,28(1):49-51.
[7]张志翔,于艳梅,范克明,等.压前评估在葡西油田古137区块压裂井中的应用[J].大庆石油地质与开发,2006,25(4):75-77.
[8]牟善波,张士诚,林景禹,等.宝浪油田无伤害压裂液研究[J].大庆石油地质与开发,2009,28(6):192-195.