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1.发明申请公开(公告)号：US20190292438A1
公开(公告)日：2019-09-26
申请号：US16251609
申请日：2019-01-18
Applicant: PETROCHINA COMPANY LIMITED
Inventor： Tianjiang Wu , Mingke Zheng , Xianwen Li , Haien Yang , Xiaorong Li , Fan Tang , Fangfang Xue , Ronghuan Chen , Rong Zhang , Lijun Zheng , Chunmei Xu , Baoche Liu , Ping Yi , Jiajie Zhu , Weiyu Bi
IPC: C09K8/588
Abstract: The present invention provides a method for in-depth profile control and displacement of low-permeability oil reservoirs, comprising: sequentially injecting a flexible and elastic particle-containing pre-slug, a polymer microsphere-containing main slug and a flexible and elastic particle-containing protective slug into an oil layer, and the three slugs have a volume ratio of total injection amount of 1-2:6-8:1-2. The invention provides a method for in-depth profile control and displacement by using styrene-based flexible and elastic particles in combination with the polyacrylamide polymer microsphere, wherein the flexible elastic particles can block cracks and large pore channels of the oil layer, and the polymer microsphere can displace the remaining oil in the oil layer. In the present invention, different slugs of profile control and displacement system are combined to achieve the objective of blocking cracks and large pore channels, displacing crude oil, and improving oil well recovery.
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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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Patent Agency Ranking
公开(公告)号：US10920127B2
公开(公告)日：2021-02-16
申请号：US16251609
申请日：2019-01-18
Applicant: PETROCHINA COMPANY LIMITED
Inventor： Tianjiang Wu , Mingke Zheng , Xianwen Li , Haien Yang , Xiaorong Li , Fan Tang , Fangfang Xue , Ronghuan Chen , Rong Zhang , Lijun Zheng , Chunmei Xu , Baoche Liu , Ping Yi , Jiajie Zhu , Weiyu Bi
IPC: C09K8/588 , C08F220/56 , C08F220/24 , E21B43/16 , C08F220/58
Abstract: The present invention provides a method for in-depth profile control and displacement of low-permeability oil reservoirs, comprising: sequentially injecting a flexible and elastic particle-containing pre-slug, a polymer microsphere-containing main slug and a flexible and elastic particle-containing protective slug into an oil layer, and the three slugs have a volume ratio of total injection amount of 1-2:6-8:1-2. The invention provides a method for in-depth profile control and displacement by using styrene-based flexible and elastic particles in combination with the polyacrylamide polymer microsphere, wherein the flexible elastic particles can block cracks and large pore channels of the oil layer, and the polymer microsphere can displace the remaining oil in the oil layer. In the present invention, different slugs of profile control and displacement system are combined to achieve the objective of blocking cracks and large pore channels, displacing crude oil, and improving oil well recovery.
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4.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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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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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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