摘要
复合铬高温暂堵体系由部分水解聚丙烯酰胺、交联剂Y、交联剂G及破胶剂等添加剂组成。在120℃下通过测定成胶时间和破胶时间评价了聚合物、交联剂种类及浓度对暂堵剂体系性能的影响,确定暂堵剂配方为:0.4%～0.55%聚合物PAM-1+0.2%～0.3%复配铬(G/Y=1～2)交联剂+0.03%破胶剂。进一步考察了盐度、剪切、地层岩性对暂堵体系的影响。结果表明,在盐度小于25 000 mg/L时,盐度对暂堵体系影响不大;在经过诸如管线和岩心剪切后,该体系的粘度保持率依然很高,保持在83%左右;与空白实验比较,该体系在砂岩及碳酸盐环境下成胶时间及破胶时间、成胶强度基本保持稳定。
High temperature temporary plugging agent of combination chromium gel system comprise crosslink agent G and Y,and gel breaking agent etc.Through the research of frozen time,stability time and gel breaking time,plugging feature of different kind and concentration of HPAM or crossing agent were evaluated at 120 ℃.Formula of high temperature temporary plugging agent was 0.4%~0.55% PAM-1＋0.2%~0.3% combination chromium crossing agent（G/Y=1~2） ＋0.03% gel breaking agent.Further investigation of salinity,shear stability and lithologic character indicate salinity have little implications when salinity was less than 25 000 mg/L,with high viscosity retention and which was about 83%,and the temporary plugging agent system remain stable compare to blank test under sandstone and carbonate lithologic environment.
出处
《应用化工》
CAS
CSCD
2012年第1期19-22,共4页
Applied Chemical Industry
基金
国家重大专项:柴达木盆地油气勘探开发关键技术研究部分成果(07-01Z-01-07 2009E-0307)
关键词
复合铬交联剂
高温暂堵剂
成胶时间
破胶时间
强度
部分水解聚丙烯酰胺
combination chromium crossing agent
high temperature temporary plugging agent
gelation time
gel breaking time
strength
HPAM
