公开(公告)号：US10246630B2

公开(公告)日：2019-04-02

申请号：US15668273

申请日：2017-08-03

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 ,  Guang Zhao ,  Yongpeng Sun ,  Xuepeng Wu

IPC分类号： C09K8/68 ,  C07C233/05 ,  C07C57/145 ,  C07C57/13 ,  C07C57/46 ,  C07C309/04 ,  C09K8/72

摘要： The present invention relates to the fracturing field, and discloses a water solution, a clean fracturing fluid, and a method for fracturing reservoir. The water solution contains organic acid amidopropyl dimethylamine, an additive, and water, wherein, the additive is at least one of salicylate, cis-butenedioic acid, o-phthalic acid, dodecyl sulfonate, p-toluene sulfonate, and benzoate. The water solution has high carbon dioxide response performance, a clean fracturing fluid that contains the water solution has superior cyclic utilization performance, and the fracturing fluid can solve the problems of conventional fracturing fluids used in fracturing stimulation of oil and gas reservoirs, including incomplete gel breaking, severe damages to the reservoir, and severe contamination of flow-back fluid, etc.

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.

公开(公告)号：US10982137B1

公开(公告)日：2021-04-20

申请号：US16899827

申请日：2020-06-12

申请人： China University of Petroleum (East China) ,  The Research Institute of Petroleum Exploration and Development (RIPED) of the Petro China Company ,  China University of Geosciences (Beijing)

发明人： Guang Zhao ,  Caili Dai ,  Xu Jin ,  Ning Yang ,  Qing You ,  Mingwei Zhao

IPC分类号： C08F220/56 ,  C09K11/06 ,  C08J3/075

摘要： The present disclosure discloses a fluorescent dispersed particle gel, a fluorescent gel, a fluorescent modified polyacrylamide composite, and a preparation method and use thereof.

公开(公告)号：US10266753B1

公开(公告)日：2019-04-23

申请号：US16040307

申请日：2018-07-19

申请人： CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)

发明人： Guang Zhao ,  Caili Dai ,  Chenglin Gu ,  Yuyang Li ,  Yahui Lv ,  Qing You ,  Yongpeng Sun ,  Mingwei Zhao ,  Yining Wu

IPC分类号： C09K8/94 ,  E21B43/20 ,  C09K8/594 ,  E21B43/16

摘要： The present invention provides a modified nano-graphite particle three-phase foam profile control and flooding system, which comprises a liquid phase and a gas phase, wherein the liquid phase comprises 0.15%-0.35% foaming agent, 0.04-0.1% foam stabilizer, and water that accounts for the remaining content, the sum of weight percentages of above components is 100%; a gas-liquid ratio of the gas phase to the liquid phase is (1-3):1. The foaming agent is selected from one of alkylsulfopropyl betaine and alkylamidopropyl betaine or a combination of them. The foam stabilizer is modified nano-graphite particles in 80-150 nm particle diameter. The present invention further provides a preparation method of the modified nano-graphite particle and a preparation method of the three-phase foam profile control and flooding system. The nano-graphite particle three-phase foam profile control and flooding system provided in the present invention can greatly improve the stability of generated foams, has excellent fluidity control capability, is low in cost, simple to prepare, and convenient for large-scale field construction.

公开(公告)号：US10119065B2

公开(公告)日：2018-11-06

申请号：US15668900

申请日：2017-08-04

申请人： China University of Geosciences (Beijing) ,  China University of Petroleum(East China)

发明人： Qing You ,  Caili Dai ,  Yan Zhang ,  Mingwei Zhao ,  Yining Wu ,  Guang Zhao ,  Yongpeng Sun ,  Huan Wang ,  Yifei Liu ,  Jichao Fang

IPC分类号： C09K8/68 ,  C07D207/325 ,  C09K8/86

摘要： The present invention relates to the field of oilfield chemistry, and discloses a composition for fracturing and displacement and a method for fracturing and displacement of a tight oil reservoir. The composition contains a pyrrolic compound represented by formula (1) and a laurate; in the formula (1), M− is halide ion, R1 is C1-C5 linear or branched alkyl, and R2 is C15-C20 linear or branched alkyl. The composition for fracturing and displacement provided in the present invention has functions of fracturing, solid carrying, imbibition, drainage and oil displacement, so as to maximize the recovery efficiency of tight oil, and attain economic and social benefits by implementing multiple functions with a single composition, saving resources, and reducing cost.

公开(公告)号：US10584276B2

公开(公告)日：2020-03-10

申请号：US16392315

申请日：2019-04-23

申请人： CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) ,  CHINA UNIVERSITY OF GEOSCIENCES (BEIJING) ,  SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE LTD., PETRO CHINA

发明人： Caili Dai ,  Mingwei Gao ,  Mingwei Zhao ,  Qing You ,  Guang Zhao ,  Yining Wu ,  Yongpeng Sun ,  Lin Li ,  Yifei Liu ,  He Liu ,  Xin Wang ,  Baoshan Guan

IPC分类号： C09K8/66 ,  C09K8/68 ,  C09K8/70 ,  E21B43/26

摘要： A CO2-sensitive fracturing and displacement fluid contains a surfactant, an auxiliary agent, water, and CO2, wherein CO2 is liquid and/or supercritical CO2. The CO2-sensitive fracturing and displacement fluid provided by the invention does not flow back after completion of fracturing construction, and the gel breaking fluid displacement is carried out after soak for a period of time to improve the tight oil recovery ratio. The CO2-sensitive fracturing and displacement fluid exerts the “one-agent multi-purpose” function of sand carrying, CO2 energization and oil displacement, surfactant imbibition and oil discharge of a fracturing-displacement system in different development and production stages, and achieves the dual goals of expanding the utilization degree of tight oil and improving the displacement efficiency of the tight oil, which can effectively reduce costs and achieve the goal of unified, highly efficient and green development of oil and gas fields.

公开(公告)号：US10550318B1

公开(公告)日：2020-02-04

申请号：US16396010

申请日：2019-04-26

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

发明人： Caili Dai ,  Guang Zhao ,  Haien Yang ,  Ping Yi ,  Sen Wang ,  Qing You ,  Long He ,  Mingwei Zhao ,  Yining Wu

IPC分类号： C09K8/88 ,  C08J3/00 ,  C08J3/075

摘要： Provided a skid-mounted dispersed particle gel production device, dispersed particle gel and a preparation method and use thereof. The device sequentially comprises, in a delivery direction of a material flow, a jet blending system, a bulk gel chemical crosslinking reaction system, a shearing and grinding system, a storage system. and an intelligent regulation system Rapid crosslinking reaction of bulk gel in a medium/high-temperature oil reservoir and large-scale preparation of multiscale dispersed particle gel can be realised, and the device is applied to continuous production in a complex environment such as a tidal flat, a hill and an offshore work platform.

公开(公告)号：US12024975B2

公开(公告)日：2024-07-02

申请号：US18297419

申请日：2023-04-07

申请人： China University of Petroleum (East China) ,  China University of Geosciences (Beijing)

发明人： Yifei Liu ,  Caili Dai ,  Guang Zhao ,  Chenwei Zou ,  Ning Yang ,  Qing You ,  Mingwei Zhao ,  Yining Wu ,  Lin Li ,  Yongpeng Sun

IPC分类号： E21B33/13 ,  C09K8/508 ,  C09K8/512 ,  C09K8/584

CPC分类号： E21B33/13 ,  C09K8/5086 ,  C09K8/512 ,  C09K8/584

摘要： The invention relates to the field of oilfield development engineering, and discloses a self-growing gel dispersion active fluidity control system and a fluid channeling control method for a low-permeability-tight reservoir. The system contains 100 parts by weight of a self-growing gel dispersion and 0.15-0.6 part by weight of a surfactant, the self-growing gel dispersion is prepared by shearing and grinding nano-reinforced chromium-aldehyde double-group cross-linked integral gel, and the preparation method of the nano-reinforced chromium-aldehyde double-group cross-linked integral gel comprises the following steps: adding a functional polymer, a phenolic resin cross-linking agent, are organic chromium cross-linking agent and a nano-reinforcer into water, mixing, and curing. The system can be simply and rapidly prepared, is easy for deep injection by adjusting the size of gel dispersion particles, is wide in action range, high in stability and long in effective period of action, can avoid reservoir pollution, and does not affect the liquid production capacity of the reservoir. The gel dispersion particles can achieve self-growth in the low-permeability-tight reservoir fractures, and the fracture fluid channeling control effect is enhanced.

公开(公告)号：US11873447B1

公开(公告)日：2024-01-16

申请号：US18353656

申请日：2023-07-17

申请人： China University of Petroleum (East China)

发明人： Mingwei Zhao ,  Caili Dai ,  Zhongzheng Xu ,  Yining Wu ,  Mingwei Gao ,  Lin Li ,  Guang Zhao

IPC分类号： C09K8/584 ,  C09K8/592 ,  B82Y30/00 ,  B82Y40/00

CPC分类号： C09K8/584 ,  C09K8/592 ,  B82Y30/00 ,  B82Y40/00 ,  C09K2208/10 ,  C09K2208/28

摘要： The present disclosure discloses superhydrophobic nanoparticles and a preparation method therefor, and a superhydrophobic nanofluid.

公开(公告)号：US11427748B2

公开(公告)日：2022-08-30

申请号：US17528370

申请日：2021-11-17

申请人： China University of Petroleum (East China)

发明人： Caili Dai ,  Lin Li ,  Jiawei Liu ,  Zhongzheng Xu ,  Guang Zhao ,  Mingwei Zhao ,  Yining Wu ,  Yongpeng Sun

IPC分类号： C09K8/512 ,  C08F220/56 ,  C09K8/516

摘要： A mussel bionic gel composition includes: a mussel bionic copolymer and/or a mussel bionic compound, a cross-linking agent and water, wherein the mussel bionic copolymer includes a structural unit A from a vinyl monomer and a structural unit B from a vinyl-containing mussel bionic catechol group monomer; and the mussel bionic compound includes polyacrylamide and a mussel bionic catechol compound. The self-growth gel particle profile control and water plugging agent prepared from the composition is low in initial apparent viscosity, easy to inject and far in migration, has good shear repairing performance and is particularly applicable to a low-permeability fractured reservoir, thereby adjusting a micro-fracture network, improving a fracture channel and increasing waterflood efficiency and recovery efficiency.