由于弱凝胶调驱体系抗剪切性能弱而限制了其在油藏中的应用，以共聚物丙烯酰胺/丙烯酸/N-乙烯基吡咯烷酮为主剂，加入甲醛-苯酚复合交联剂和高温稳定剂，制备了调驱性能较好的弱凝胶体系。考察了聚合物质量浓度、稳定剂质量浓度、交联剂/聚合物质量比、交联剂配制摩尔比、温度、pH值以及矿化度对成胶性能的影响。确定了弱凝胶体系的最佳使用条件：聚合物AM/AA/NVP质量浓度2000 mg/L，交联剂/聚合物质量比2/1000，交联剂（甲醛/苯酚）摩尔比4∶1，稳定剂（硫脲）质量浓度100 mg/L，pH值为7，温度60℃。室内调驱性能评价表明，该体系具有良好的抗剪切性能，黏度保留率达到91.38%，同时封堵率在99%以上，突破压力大于7 MPa，并且还具有一定的选择封堵能力，剖面改善率达到80%以上。
The weak shear resistance of weak gel proifle controlling and lfooding system limits its application in reservoirs, we prepared a weak gel system with favorable proifle controlling and lfooding performance with AM/AA/NVP as the main agent and added Phenol-formaldehyde as cross-linking agent and temperature stabilizer. We studied the effects of polymer concentration, stabilizer con-centration, crosslinker/polymer proportion, crosslinker concentration, temperature, pH and salinity on the gelling property. The optimum conditions for preparing the weak gel system were identiifed as follows:concentration of polymer (AM/AA/NVP):2 000 mg/L;mass ratio of crosslinker/polymer:2/1 000;proportion of crosslinker (formaldehyde/phenol):4∶1;concentration of stabilizer:100 mg/L;pH of the system:7;and suitable temperature 60℃. The in-house evaluation on proifle controlling and lfooding performance shows that the system has good shear resistance, its viscosity retention rate is up to 91.38%, and its plugging rate is above 99%, its breakthrough pres-sure is greater than 7 MPa and has certain selective plugging capability, and the sectional improvement rate is over 80%.
赖南君;闻一平;傅波;徐俊芳;王思遥;王爱香
西南石油大学化学化工学院，四川成都 610500长庆油田公司第三采油厂，宁夏银川 750006川庆钻探工程有限公司长庆井下技术作业公司，陕西西安 710018华北油田公司，河北任丘 062552
能源科技
弱凝胶;复合交联;成胶性能;调驱
weak gel;composite cross-linking;gelling property;proifle controlling and lfooding
《石油钻采工艺》 2014 (003)
87-91 / 5
高等学校博士学科点专项科研基金（编号20125121120011）；油气藏地质及开发工程国家重点实验室开放基金（编号PLN1212）；西南石油大学课外开放性实验重点项目（编号KSZ13058）。
10.13639/j.odpt.2014.03.022
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