公开(公告)号：US10745281B1

公开(公告)日：2020-08-18

申请号：US16799255

申请日：2020-02-24

申请人： China University of Petroleum (East China) ,  China University of Geosciences (Beijing) ,  Northwest Oilfield Branch, China Petroleum & Chemical Co., Ltd

发明人： Guang Zhao ,  Caili Dai ,  Yahui Lv ,  Jiawei Liu ,  Sen Wang ,  Ning Sun ,  Qing You ,  Guangjie Hu ,  Long He ,  Liang Li

IPC分类号： C01B32/225 ,  C09K8/42 ,  C01B32/23

摘要： The present disclosure relates to the field of oilfield chemistry, in particular to a composition for multi-component composite intercalation, a method of preparing a graphite system and a method of profile control and water shutoff.

公开(公告)号：US20190249068A1

公开(公告)日：2019-08-15

申请号：US16233727

申请日：2018-12-27

申请人： China University of Petroleum (East China) ,  China University of Geosciences (Beijing) ,  Oil and Gas Technology Research Institute, PetroChina Changqing Oilfield Company

发明人： Guang Zhao ,  Caili Dai ,  Qing You ,  Sen Wang ,  Hai'en Yang ,  Ping Yi ,  Lin Li

IPC分类号： C09K8/516 ,  C09K8/504 ,  C09K8/508 ,  C09K8/512

CPC分类号： C09K8/516 ,  C09K8/5045 ,  C09K8/5083 ,  C09K8/512 ,  C09K2208/10

摘要： The present invention relates to the field of profile control and flooding in oil fields, particularly to a colloidal nano-graphite-strengthened bulk gel system for dispersed particle gel, and composition thereof. The composition for bulk gel system, containing a polymeric matrix, a resin cross-linking agent, a coagulant, and colloidal nano-graphite, wherein, with respect to 100 parts by weight of the polymeric matrix, a content of the resin cross-linking agent is 30-150 parts by weight, a content of the coagulant is 5-100 parts by weight, and a content of the colloidal nano-graphite is 3-30 parts by weight; wherein, the polymeric matrix is partially hydrolyzed polyacrylamide with weight-average molecular weight within a range of 5,000,000-8,000,000 g/mol; the coagulant is one or more of chloride salt coagulant and alcohol amine coagulant. The specific components in the composition for dispersed particle gel in the present invention have excellent compatibility with each other, and can form a high-strength bulk gel system within 3-6 h at 85-95° C., and the obtained dispersed particle gel has relatively high temperature-resistance and salinity-resistance properties.

公开(公告)号：US09932517B1

公开(公告)日：2018-04-03

申请号：US15671736

申请日：2017-08-08

申请人： China University of Petroleum (East China) ,  Research Institute of Petroleum Exploration & Development

发明人： Caili Dai ,  Mingwei Zhao ,  He Liu ,  Yining Wu ,  YOngpeng Sun ,  Guang Zhao ,  Zhongliang Xu

IPC分类号： C09K8/74 ,  C08F220/56

CPC分类号： C09K8/74 ,  C08F220/56 ,  C09K2208/32

摘要： The present invention relates to the field of oil-field chemical reagents, and discloses a polymer, a preparation method of the polymer, and a viscosified acid fluid. The polymer contains structural units represented by formula (1), structural units represented by formula (2), and structural units represented by formula (3), wherein, R1-R6 and R11-R13 are H or C1-C4 linear or branched alkyl respectively and independently, R7 is C1-C4 linear or branched alkylene, R8-R10 are C1-C5 linear or branched alkyl respectively and independently, R14 is C1-C4 linear or branched alkyl, and n=0-4.