摘要
对三种聚合物配制的CDG体系进行粘度和转变压力测定,发现三种CDG体系在配制15天后均能达到100mPa.s或以上粘度及0.05MPa以上的转变压力;在短岩心动态实验中,CDG体系的阻力系数和残余阻力系数都上升较高,说明了CDG体系可以有效的成胶并具有较长的凝结时间,达到需要的注入剂量和凝胶强度,满足实验要求。采用优选的配方2号HPAM,相对分子质量1300万,清水浓度500mg/L,聚铝比30∶1,进行有、无隔层的非均质油藏深度调剖驱油实验,表明逐步增大封堵深度可以进一步提高油层采收率。
The viscosity and transmission pressure of CDG systems were measured to 100 mPa. s and 0.05MPa after 15 days, and the resistance coefficient and the residual resistance coefficient had ascended sharply during the water flooding experiments in short - size cores. The results showed that the CDG systems were able to make gelation effectively and hold an enough long time, the a-mount of injection and the strength of gel could be approached. The choiced formula was: No. 2 HPAM, 13, 000,000 of molecular weight, 500 mg/L of neat water and 30: 1 of the ratio of polymer to aluminum. Deep profile controlling oil - displacement experiments were carried out in the heterogeneous models with or without separation layer respectively. It was indicated that the oil recovery could be further enhanced as the sealed depth had been increased.
出处
《石油与天然气化工》
CAS
CSCD
北大核心
2005年第5期401-404,共4页
Chemical engineering of oil & gas
关键词
CDG
转变压力
非均质油藏
深度调剖
CDG, transmission pressure, heterogeneous reservoir, deep profile controlling
