Abstract HTML Views: 718 PDF Downloads: 257 Total Views/Downloads: 1137
Abstract HTML Views: 458 PDF Downloads: 185 Total Views/Downloads: 766
Under the constraints of high temperature and heterogeneity, the common profile control agent can not effectively
plug the steam channeling. To address this issue, it is necessary to develop the high temperature resistance steam
channeling plugging agent to improve the steam suction profile in the heavy oil reservoir. This paper used Simple Variable
Method to optimize the content of the components of the high temperature resistant plugging agent. Static performances
evaluation aims to study the influence rules of the formation condition (temperature, salinity and pH value). Dynamic
evaluation is used to study its performance (plugging ratio, residual resistance factor, scouring resistance and thermal
stability) in the sand-filled pipe to testify its applicability. The ratio of the component and the injection sequence are
shown as follows: 0.03% coagulant +2.2% cross-linking agent I + 1.2% cross-linking II + 6% high efficient main agent.
The evaluation experiment results show that the gel can resist at least 280ºC, the plugging ratio is above 93.1%. The plugging
ratio only have a 8.43% reduction after scoured by 15 PV steam (280ºC). After a 10-day thermal stability experiment
(280 ºC), the plugging ratio is still above 80%. The result indicated that the plugging agent is suitable for the improvement
of steam suction profile. The suggested way of injection is also provided.