公开(公告)号：US11970661B2

公开(公告)日：2024-04-30

申请号：US17830368

申请日：2022-06-02

申请人： YANGTZE UNIVERSITY

发明人： Xuemin Yan ,  Peiyue Wu ,  Hao Li ,  Huan Yang ,  Zhaofei Ma ,  Zhongfu Cheng ,  Fei Deng

IPC分类号： C09K8/584 ,  C09K8/592

CPC分类号： C09K8/584 ,  C09K8/592

摘要： A combined catalytic viscosity reducing system includes a catalyst slug, a heat generating system slug, a gas injection slug, and a water-soluble viscosity reducing system slug. The catalyst slug includes 10%-15% of azacarbene iron, 15%-30% of tert-butyl hydroperoxide, 2%-5% of phosphoric acid, 2%-5% of hydrogen donor, and 0.5%-1% of emulsifier agent, and the others are solvent. The heat generating system slug includes 10%-30% of NaNO2, 8%-25% of NH4Cl, and 3%-10% of acid initiator, and the others are water, totaling 100%. The water-soluble viscosity reducing system slug, according to mass percentage, includes 0.2%-0.5% of surfactant and 2%-10% of alkali, and the others are water. The combined catalytic viscosity reducing system can effectively reduce viscosity without injecting steam, and the viscosity reduction rate can reach 96.5%.

公开(公告)号：US20220380659A1

公开(公告)日：2022-12-01

申请号：US17830368

申请日：2022-06-02

申请人： YANGTZE UNIVERSITY

发明人： Xuemin Yan ,  Peiyue Wu ,  Hao Li ,  Huan Yang ,  Zhaofei Ma ,  Zhongfu Cheng ,  Fei Deng

IPC分类号： C09K8/584 ,  C09K8/592

摘要： Disclosed is a combined catalytic viscosity reducing system and a use of the combined system. The combined catalytic viscosity reducing system comprises four slugs, the four slugs are a catalyst slug, a heat generating system slug, a gas injection slug, and a water-soluble viscosity reducing system slug; the catalyst slug includes 10%-15% of azacarbene iron, 15%-30% of tert-butyl hydroperoxide, 2%-5% of phosphoric acid, 2%-5% of hydrogen donor, and 0.5%-1% of emulsifier agent, and the others are solvent; the heat generating system slug includes 10%-30% of NaNO2, 8%-25% of NH4Cl, and 3%-10% of acid initiator, and the others are water, totaling 100%; the water-soluble viscosity reducing system slug, according to mass percentage, includes 0.2%-0.5% of surfactant and 2%-10% of alkali, and the others are water. The combined catalytic viscosity reducing system can effectively reduce viscosity without injecting steam, and the viscosity reduction rate can reach 96.5%.