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公开(公告)号：US11008830B2
公开(公告)日：2021-05-18
申请号：US16529694
申请日：2019-08-01
Applicant: PetroChina Company Limited
Inventor： Gaixing Hu , Hongjun Lu , Bin Yao , Yafeng Ju , Jiuzheng Yu , Lingzhi Yang , Fuwei Bi , Zijian Wang , Loulou Li
Abstract: The present invention provides a stratified waterflooding apparatus, which comprises: a water distribution unit, which comprises two water distributors, the water distributor having an inner side wall and an outer side wall, the inner and outer side walls forming a first annular cavity therebetween and being respectively provided with a water inlet and a water outlet which are communicated with the first annular cavity, the first annular cavity accommodates a driving mechanism and an adjustable blocking member, the adjustable blocking member having a first operating position in which it blocks the water inlet or the water outlet and a second operating position in which it releases the blocking of the water inlet and the water outlet; and a controller in communication connection with the driving mechanism. The stratified waterflooding apparatus can realize intelligent and automatic regulation of an aperture of the water distributors in the stratified waterflooding process.
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2.发明申请公开(公告)号：US20190276731A1
公开(公告)日：2019-09-12
申请号：US16240107
申请日：2019-01-04
Applicant: PetroChina Company Limited
Inventor： Lijun Mu , Xianwen Li , Hongjun Lu , Zhiying Deng , Yong Wang , Bin Yao , Zhenning Ji , Suiwang Zhang , Xiaobing Lu , Zhaojie Song , Erzhen Wang , Lei Sui
Abstract: The present disclosure provides a diverting agent for diversion acidizing in water injection wells and a preparation method thereof. The diverting agent for diversion acidizing in water injection wells has a raw material composition including: 3%-6% of ethylenediamine, 12%-25% of bromododecane, 10%-20% of a solvent, 10%-20% of an assistant, 14%-28% of oleic acid, 5%-10% of stearic acid salt, 1%-2% of a dispersing agent and a balance of water. The present disclosure also provides a method for preparing the above-mentioned diverting agent for diversion acidizing in water injection wells. The diverting agent for diversion acidizing in water injection wells of the present disclosure can be used for temporary plugging diverting of acid solution in on-line acidification of water injection wells or in acidification operation of oil reservoir with a greater heterogeneity, which has good compatibility with the acid solution and can be used for temporary plugging of high-permeability zones.
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3.发明申请公开(公告)号：US20190276730A1
公开(公告)日：2019-09-12
申请号：US16239712
申请日：2019-01-04
Applicant: PetroChina Company Limited
Inventor： Lijun Mu , Xianwen Li , Hongjun Lu , Zhiying Deng , Yong Wang , Bin Yao , Zhenning Ji , Suiwang Zhang , Xiaobing Lu , Zhaojie Song , Lei Sui , Erzhen Wang
IPC: C09K8/74
Abstract: The present disclosure provides an on-line diverting acid for continuous injection into water injection wells and a preparation method thereof. The on-line diverting acid for continuous injection into water injection wells has a raw material composition of: 5.0-25.0% of hydrochloric acid, 3.0%-6.0% of ammonium fluoride, 4.0%-8.0% of a diverting agent, 3.0%-7.0% of a chelating agent, 1.0-3.0% of a corrosion inhibitor, 1.0-3.0% of an anti-swelling/swelled-clay-shrinking agent and a balance of water. The present disclosure also provides a preparation method of the above-mentioned on-line diverting acid. The on-line diverting acid of the present disclosure can remove plugging from deep zones of high and low permeability layers, and can be continuously injected to simplify the construction process, so as to achieve the purpose of reducing the pressure and stimulating the injection.
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Patent Agency Ranking
公开(公告)号：US10975294B2
公开(公告)日：2021-04-13
申请号：US16229602
申请日：2018-12-21
Applicant: PetroChina Company Limited
Inventor： Lijun Mu , Xianwen Li , Hongjun Lu , Yong Wang , Bin Yao , Zhenning Ji , Suiwang Zhang , Xiaobing Lu , Zhaojie Song , Lei Sui , Zhiying Deng , Erzhen Wang , Wei Wang , Juntao Wang
Abstract: An injection stimulation agent for water injection well and the preparation method and application thereof are described. The raw material composition of the injection stimulation agent for water injection well comprises: 5.0%-10.0% of sulfamic acid, 10.0%-20.0% of methanol, 10.0%-20.0% of tartaric acid, 10.0%-20.0% of ethylenediamine tetramethylene phosphoric acid, 5.0%-10.0% of sodium polyacrylate, 5.0%-8.0% of cocoyl hydroxyethyl sulfonic acid and the balance of water. Embodiments include a preparation method of the above injection stimulation agent. The injection stimulation agent for water injection well can be used in acidizing treatment process of the reservoir, and can be used directly. The injection stimulation agent can play the role of shrinking swelled clay at the same time of dissolving scale, and finally achieve the purpose of depressurization and enhanced production.
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公开(公告)号：US10961442B2
公开(公告)日：2021-03-30
申请号：US16239712
申请日：2019-01-04
Applicant: PetroChina Company Limited
Inventor： Lijun Mu , Xianwen Li , Hongjun Lu , Zhiying Deng , Yong Wang , Bin Yao , Zhenning Ji , Suiwang Zhang , Xiaobing Lu , Zhaojie Song , Lei Sui , Erzhen Wang
IPC: C09K8/74
Abstract: On-line diverting acids for continuous injection into water injection wells and methods of preparing the diverting acid are disclosed. The on-line diverting acids have a raw material composition of: 5.0-25.0% of hydrochloric acid, 3.0%-6.0% of ammonium fluoride, 4.0%-8.0% of a diverting agent, 3.0%-7.0% of a chelating agent, 1.0-3.0% of a corrosion inhibitor, 1.0-3.0% of an anti-swelling/swelled-clay-shrinking agent and a balance of water. The on-line diverting acids can remove plugging from deep zones of high and low permeability layers, and can be continuously injected to simplify the construction process, to achieve the purpose of reducing the pressure and stimulating the injection.
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公开(公告)号：US10890059B2
公开(公告)日：2021-01-12
申请号：US16175620
申请日：2018-10-30
Applicant: PetroChina Company Limited
Inventor： Lingzhi Yang , Yafeng Ju , Bin Yao , Jiuzheng Yu , Bilin Luo , Fuwei Bi , Zijian Wang , Yanqing Liu
IPC: E21B43/20
Abstract: A layered water injection system and a layered water injection method. The system comprises: a ground water injection valve group configured with an intelligent control valve, for receiving a water injection control instruction sent by a remote control center, and for converting the water injection control instruction into a switching action of the intelligent control valve to control water flow pressure fluctuation in a water injection string, so as to form a first pressure wave code in the water injection string; a water distributor for collecting the first pressure wave code, interpreting the first pressure wave code as a corresponding water outlet switch instruction, and performing layered water injection control according to the water outlet switch instruction. The embodiments of the application can improve the automation level of layered water injection and the reliability of layered water injection control.
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7.发明申请公开(公告)号：US20190316031A1
公开(公告)日：2019-10-17
申请号：US16229602
申请日：2018-12-21
Applicant: PetroChina Company Limited
Inventor： Lijun Mu , Xianwen Li , Hongjun Lu , Yong Wang , Bin Yao , Zhenning Ji , Suiwang Zhang , Xiaobing Lu , Zhaojie Song , Lei Sui , Zhiying Deng , Erzhen Wang , Wei Wang , Juntao Wang
Abstract: The present invention provides an injection stimulation agent for water injection well and the preparation method and application thereof. The raw material composition of the injection stimulation agent for water injection well comprises: 5.0%-10.0% of sulfamic acid, 10.0%-20.0% of methanol, 10.0%-20.0% of tartaric acid, 10.0%-20.0% of ethylenediamine tetramethylene phosphoric acid, 5.0%-10.0% of sodium polyacrylate, 5.0%-8.0% of cocoyl hydroxyethyl sulfonic acid and the balance of water. The present invention further provides a preparation method of the above injection stimulation agent. The injection stimulation agent for water injection well of the present invention can be used in acidizing treatment process of the reservoir, and can be used directly. The injection stimulation agent can play the role of shrinking swelled clay at the same time of dissolving scale, and finally achieve the purpose of depressurization and enhanced production.
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公开(公告)号：US20180187069A1
公开(公告)日：2018-07-05
申请号：US15857386
申请日：2017-12-28
Applicant: PetroChina Company Limited
Inventor： Zhiying Deng , Lijun Mu , Hongjun Lu , Bin Yao , Xiaobing Lu , Yong Wang , Zhaojie Song , Lei Sui , Erzhen Wang
IPC: C09K8/74 , C09K8/528 , E21B43/28 , C07C229/16 , C07C59/265 , C07C53/08 , B01J19/00
CPC classification number: C09K8/74 , B01J19/0013 , B01J2219/00051 , B01J2219/00177 , C07C53/08 , C07C59/265 , C07C229/16 , C09K8/528 , E21B43/25 , E21B43/28
Abstract: Embodiments of the present invention provide a chelating agent and its preparation method and use. The chelating agent is prepared from the following raw materials in weight percent with respect to 100% of the total weight of the prepared chelating agent: 15% to 30% of an iron ion stabilizing agent, 5% to 12% of dichloroethane, 10% to 20% of ethanol solution, 10% to 20% of sodium hydroxide, 5% to 10% of carbon disulfide, 1.5% to 4.5% of an adjuster, and water as balance. The raw materials for the chelating agent according to the present invention are widely available from a variety of sources, and are less expensive. The chelating agent according to the present invention has a stable performance and a long lifetime, can be stored and use for a long time, and is highly compatible with acidizing acid liquid systems.
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