第33卷第3期 2016年5月
钻井液与完井液
DRILLINGFLUID&COMPLETIONFLUID
doi: 10.3696/j.issn.1001-5620.2016.03.023
Vol.33 No.3 May2016
适用于稠油热采并的激活型完并液体系
邢希金，刘书杰，罗刚2，谢仁军
（1.中海油研究总院，北京100028；2.荆州市汉科新技术研究所，湖北荆州434000）
邢希金等，适用于稠油热采并的激活型完井液体系[1].钻井液与完井液，2016，33（3)：112-116.
摘要稠油热采井在注蒸汽过程中及关井后，进入油层的完井液滤液和蒸汽中的水在高温下将与地层岩石矿物及地层流体发生反应，产生储层伤害。为此，提出使用激活型完井液体系。引入激活酸HJS，使残留在地层中的完井液在一定温度下激活，释放出[H']，降低pH值，减小矿物在高pH条件下溶解和转化而对储层产生的伤害；并优选出了高温防膨剂
高温缓蚀剂HJP以及最优加量，构建了激活型完井液体系。室内评价表明
HTW、高温减阻剂HUL、高温溶蚀剂HDB、
该体系激活温度为80℃，激活时间为60min，激活酸HJS的加入可以大幅度提高完井液对钻屑的溶蚀能力；体系在220 ℃高温下老化8h的膨胀率仅为1.11%，与地层水配伍，混合液的油度在3.6～6.9NTU之间，蒸汽（270℃）驱替后渗透率恢复值大于90%（测温为80℃），表明该激活型完并液体系具有很好的储层保护效果。
关键词稠油热采；完井液；激活型；减阻；蒸汽要替；防止地层损害
中图分类号：TE257.6
文献标识码：A
文章编号：1001-5620（2016）03-0112-05
ActivatedCompletionFluid forThermal HeavyOilRecovery
XING Xijin', LIU Shujie', LUO Gang, XIE Renjun
(1.Research Institute of CNOOC, Beijing 100028;2. Hubei HANC New-Technology Research Center,Jingzhou, Hubei 434000) Abstract In thermal recovery of heavy oils, after well shut-in, the filtrates of the completion fluids entering the reservoir formations and water from the injected steam will react with rock minerals and formation fluids at high temperature. This reaction will inevitably damage thereservoirformations in contact.To avoid thisdamage, an activating completionfluid has been introduced.The activating acid, HJS, is used to activate the residue completion fluid in reservoir formations at certain temperature, and hydrogen ions are released to reduce the pH ofthe reaction system. This will mitigate the dissolution offormation minerals at high pH which is a cause offormation damage. Several additives such as high temperature swelling inhibitor HTW, high temperature friction reducer HUL, high temperature erosion agent HDB and high temperature corrosion inhibitor HJP were chosen and their optimum concentrations determined. With these additives, an activating completion fluid has been formulated. In laboratory experiments, the activating temperature of the completion fluid is 80 C, and the activating time, 60 min. The use of HJS greatly enhances the dissolution of drilled cuttings by the completion fluid. The ratio of swelling of the completion fluid after aging at 220 C for 8 h is only 1.11%. The completion fluid is compatible with formation waters, and the turbidity of the mixed fluid is between 3.6 NTU and 6.9 NTU. The recovery of permeability after steam (270 °C) flooding is greater than 90% (measured at 80 C). These data demonstrate that the activating completion fluid plays a positive role in protecting reservoirformations.
Key words Thermal recovery of heavy oil; Completion fluid; Activating; Friction reduction; Steam flooding; Prevent formation from damaging
稠油热采井在完井过程中完井液滤液难免漏失
及地层流体发生反应。文献研究表明，黏土矿物在
进人油层，在注蒸汽过程中及关井后进人油层的完井液滤液和蒸汽中的水在高温下将与地层岩石矿物
高温、高pH值蒸汽中部分向水敏性矿物蒙脱石转化，蒙脱石在储层中遇矿化度低的蒸汽凝析液时会
基金项目：国家科技重大专项“海上稠油热采井注汽过程储层保护实验（试验）研究”（2011ZX05024-005）项目资助。第一作者简介：邢希金，高级工程师，2008年毕业于西南石油大学并获硕士研究生学位，现主要从事海洋石油开发
钻完井液及非常规工作液研究工作。电话（010）84526245；E-mail；xingxj2cnooc.com.cn。万方数据