Patents by Inventor Jianchun GUO
Jianchun GUO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12234309Abstract: The present disclosure provides a high-temperature-resistant deep penetration molecular membrane acid copolymer and a preparation method thereof. The copolymer is formed by polymerizing four raw monomers including 2-acrylamido-2-methylpropanesulphonic acid, vinyl phosphonic acid, alkyl dimethylallyl ammonium chloride, and perfluoropolyether acrylate. The method comprises: S1: mixing and stirring solvent oil, an emulsifier, the alkyl dimethyl allyl ammonium chloride, and the perfluoropolyether acrylate to be dispersed homogeneously to obtain an oil phase; S2: mixing and stirring the 2-acrylamido-2-methylpropanesulphonic acid, the vinyl phosphonic acid, a complexing agent, and distilled water, and adjusting pH to obtain an aqueous phase; S3: slowly dropwise adding the aqueous phase to the oil phase; and S4: introducing nitrogen into the water-in-oil emulsion to remove oxygen, then adding an initiator and carrying out a heating polymerization reaction to obtain copolymer emulsion (i.e.Type: GrantFiled: June 16, 2024Date of Patent: February 25, 2025Assignees: CHENGDU LEPS TECHNOLOGY CO., LTD., SOUTHWEST PETROLEUM UNIVERSITYInventors: Jianchun Guo, Bin Liu, Bo Gou, Shan Ren, Shaobin Zhang, Yang Lu, Qingsong Guo, Mingyuan Zhou, Yangyi Xing, Jichuan Ren, Hao Ou, Gang Li
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Patent number: 12227696Abstract: The present invention pertains to the field of oilfield stimulation technologies for oil and gas field development, in particular to an instant soluble temperature and salt resistant polyacrylamide and the preparation method and application thereof, and the polyacrylamide is modified by adding rigid temperature and salt resistant monomer containing benzene ring and cationic fluorinated hydrophobic monomer on the basis of acrylamide monomer and sodium acrylate monomer, and then polymerized to obtain instant soluble temperature and salt resistant polyacrylamide. The temperature and salt resistant monomer containing benzene ring can improve the thermal stability and temperature and salt resistance of polyacrylamide, while the long-chain cationic fluorinated hydrophobic monomer can enhance the hydrophobicity of polymer. The comprehensive properties of polymer is improved by appropriate intermolecular association.Type: GrantFiled: July 25, 2023Date of Patent: February 18, 2025Assignees: Chengdu LEPS Technology Co., Ltd, Southwest Petroleum UniversityInventors: Jianchun Guo, Shan Ren, Cong Lu, Bin Liu, Shaobin Zhang, Huifei Mao, Su Diao, Xueshan Yang, Chaojun Tang, Junyao Ran, Guangyao Yang
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Patent number: 12168752Abstract: The present invention discloses a novel high-temperature visual acid etching test device and method; the test device includes a visual rock slab holder, an acid solution storage tank I, an acid solution storage tank II, a heating apparatus, a high-pressure water pump, a low-pressure acid pump, a back-pressure valve, an acid valve A, an acid valve B, an acid valve C, an acid valve D, an acid valve E, an acid valve F, a water valve G, a water valve H, a water valve I, a water valve J, and a water valve K; both the acid solution storage tank I and the acid solution storage tank II are provided with a piston therein, where the acid solution storage tank is divided into upper and lower independent parts by the piston. According to the present invention, the flowing process of an acid solution in a fracture can be directly observed to accurately characterize the distribution of the acid solution in the fracture, which facilitates a study on an acid etching mechanism.Type: GrantFiled: January 3, 2024Date of Patent: December 17, 2024Assignee: Southwest Petroleum UniversityInventors: Kun Wang, Shouxin Wang, Jianchun Guo, Chi Chen, Tao Zhang, Xiang Bai, Xinghao Gou, Jichuan Ren, Cong Lu, Bo Gou, Jie Lai
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Publication number: 20240327699Abstract: The present invention pertains to the field of oilfield stimulation technologies for oil and gas field development, in particular to an instant soluble temperature and salt resistant polyacrylamide and the preparation method and application thereof, and the polyacrylamide is modified by adding rigid temperature and salt resistant monomer containing benzene ring and cationic fluorinated hydrophobic monomer on the basis of acrylamide monomer and sodium acrylate monomer, and then polymerized to obtain instant soluble temperature and salt resistant polyacrylamide. The temperature and salt resistant monomer containing benzene ring can improve the thermal stability and temperature and salt resistance of polyacrylamide, while the long-chain cationic fluorinated hydrophobic monomer can enhance the hydrophobicity of polymer. The comprehensive properties of polymer is improved by appropriate intermolecular association.Type: ApplicationFiled: July 25, 2023Publication date: October 3, 2024Applicants: Chengdu LEPS Technology Co., Ltd, Southwest Petroleum UniversityInventors: Jianchun GUO, Shan REN, Cong LU, Bin LIU, Shaobin ZHANG, Huifei MAO, Su DIAO, Xueshan YANG, Chaojun TANG, Junyao RAN, Guangyao YANG
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Publication number: 20240228864Abstract: The present invention discloses a novel high-temperature visual acid etching test device and method; the test device includes a visual rock slab holder, an acid solution storage tank I, an acid solution storage tank II, a heating apparatus, a high-pressure water pump, a low-pressure acid pump, a back-pressure valve, an acid valve A, an acid valve B, an acid valve C, an acid valve D, an acid valve E, an acid valve F, a water valve G, a water valve H, a water valve I, a water valve J, and a water valve K; both the acid solution storage tank I and the acid solution storage tank II are provided with a piston therein, where the acid solution storage tank is divided into upper and lower independent parts by the piston. According to the present invention, the flowing process of an acid solution in a fracture can be directly observed to accurately characterize the distribution of the acid solution in the fracture, which facilitates a study on an acid etching mechanism.Type: ApplicationFiled: January 3, 2024Publication date: July 11, 2024Applicant: Southwest Petroleum UniversityInventors: Kun WANG, Shouxin WANG, Jianchun GUO, Chi CHEN, Tao ZHANG, Xiang BAI, Xinghao GOU, Jichuan REN, Cong LU, Bo GOU, Jie LAI
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Publication number: 20240133281Abstract: A calculation system for predicting a proppant embedding depth based on a shale softening effect is provided, including a sampling test terminal, a scheduling module, a monitoring module, and a calculation module, wherein the scheduling module, the monitoring module, and the calculation module are connected in communication, and the monitoring module is connected to an external operating system through a wireless network, wherein the external operating system is configured to perform a hydraulic fracturing operation and receive a first control signal and/or a second control signal from the monitoring module. The sampling test terminal is configured to test the samples and obtain test data. The scheduling module is configured to determine a target construction parameter.Type: ApplicationFiled: December 23, 2023Publication date: April 25, 2024Applicant: SOUTHWEST PETROLEUM UNIVERSITYInventors: Cong LU, Qijun ZENG, Jianchun GUO, Jiaxing LIU, Jun WU, Junkai LU, Cheng LUO, Guangqing ZHOU, Xianbo MENG, Jiandong WANG, Yanhui LIU, Xiaoshan WANG, Xin SHAN
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Publication number: 20240037301Abstract: The present invention relates to a three-dimensional acid fracturing method for carbonate reservoirs in long intervals, which sequentially comprises the following steps: S1: based on the distribution characteristics of porosity and permeability of the reservoir where the candidate well is located, the reservoirs are divided into Class I, Class II and Class III, and the required acid fracturing fracture density range ?ir of different types of reservoirs is determined according to the increase of production; S2: Determine the most economical fracture number Ne when the economic net present value NPV of candidate wells reaches the maximum in the fifth year based on interval length of different types of reservoirs in candidate wells and acid fracturing fracture density range ?ir determined by S1; S3: Determine the three-dimensional acid fracturing segmented fracture arrangement technology according to the completion mode of the candidate well and the most economical fracture number Ne determined by S2; S4: BasedType: ApplicationFiled: April 19, 2023Publication date: February 1, 2024Inventors: Jianchun GUO, Bo GOU, Jichuan REN, Jie ZENG, Ting YU, Chi CHEN, Yingxian MA, Jie LAI, Xiao LI, Yu FAN, Weihua CHEN, Fei LIU
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Patent number: 11845896Abstract: A structural stabilizer for a fiber and proppant complex to enhance proppant migration and placement in a fractured well during propping and a preparation method thereof are provided. The structural stabilizer consists of: water, inorganic salt, kaolinite, nitrogen-doped modified graphene oxide, anionic surfactant, non-ionic alkyl polyglucoside, and polyacrylamide. The structural stabilizer improves bonding between a proppant and a fiber when slick water is used in stimulated reservoir volume (SRV) fracturing, prevents separation of the fiber and the proppant during migration, thereby reducing escape rate of the fiber from the fiber and proppant complex.Type: GrantFiled: July 13, 2023Date of Patent: December 19, 2023Assignees: Chengdu LEPS Technology Co., Ltd, Southwest Petroleum UniversityInventors: Jianchun Guo, Shan Ren, Hao Yang, Yingxian Ma, Kun Wang, Jiyu Wang, Cong Lu, Jiapeng Zhang, Zhihong Zhao, Shaobin Zhang, Qianli Lu, Qingsong Guo, Su Diao, Chi Chen, Xin Lei, Mingyuan Zhou, Chaojun Tang
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Patent number: 11821518Abstract: A soluble metal sealing ring with a controllable dissolution rate and preparation process thereof include an aluminum alloy sealing ring matrix and a composite coating coated on an outer surface of the aluminum alloy sealing ring matrix whose standard electrode potential is greater than ?0.3 volts (V). The preparation process includes: (1) preparing a high-plastic aluminum alloy; (2) preparing the aluminum alloy sealing ring matrix by machining; (3) annealing the aluminum alloy sealing ring matrix; (4) mixing raw materials of the composite coating evenly; (5) preparing the composite coating on an outer surface of the aluminum alloy sealing ring matrix; (6) preparing holes. The soluble metal sealing ring solves problem that good sealing performance and good dissolving performance are difficult to obtain simultaneously in the existing product, and has advantages of good sealing performance, controllable dissolving rate, no blockage and others.Type: GrantFiled: January 17, 2023Date of Patent: November 21, 2023Assignee: SOUTHWEST PETROLEUM UNIVERSITYInventors: Xiaohong Wang, Yangang Jiang, Jianchun Guo, Tao Liu, Shilei Xu, Zishuo Li, Yuanhua Lin
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Publication number: 20230334199Abstract: The present disclosure relates to a calculation method for predicting a proppant embedding depth based on a shale softening effect, including determining a spontaneous imbibition depth-soaking time curve; determining a Young’s modulus-soaking time curve of core surfaces; establishing a proppant embedding model containing a softened layer by a finite element method; conducting a numerical simulation to obtain an embedding volume-soaking time curve; and obtaining a calculation formula for a proppant embedding volume considering a softening effect.Type: ApplicationFiled: April 14, 2023Publication date: October 19, 2023Applicant: SOUTHWEST PETROLEUM UNIVERSITYInventors: Cong LU, Qijun ZENG, Jianchun GUO, Jiaxing LIU, Jun WU, Junkai LU, Cheng LUO, Guangqing ZHOU, Xianbo MENG, Jiandong WANG, Yanhui LIU, Xiaoshan WANG, Xin SHAN
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Publication number: 20230265923Abstract: A soluble metal sealing ring with a controllable dissolution rate and preparation process thereof include an aluminum alloy sealing ring matrix and a composite coating coated on an outer surface of the aluminum alloy sealing ring matrix whose standard electrode potential is greater than -0.3 volts (V). The preparation process includes: (1) preparing a high-plastic aluminum alloy; (2) preparing the aluminum alloy sealing ring matrix by machining; (3) annealing the aluminum alloy sealing ring matrix; (4) mixing raw materials of the composite coating evenly; (5) preparing the composite coating on an outer surface of the aluminum alloy sealing ring matrix; (6) preparing holes. The soluble metal sealing ring solves problem that good sealing performance and good dissolving performance are difficult to obtain simultaneously in the existing product, and has advantages of good sealing performance, controllable dissolving rate, no blockage and others.Type: ApplicationFiled: January 17, 2023Publication date: August 24, 2023Inventors: Xiaohong Wang, Yangang Jiang, Jianchun Guo, Tao Liu, Shilei Xu, Zishuo Li, Yuanhua Lin
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Patent number: 11578576Abstract: A method for characterizing complexity of rock fracture based on fractal dimension and a device thereof are provided. The method includes steps of: collecting rock fracture samples of a rock, and collecting basic parameters of the rock; determining a fractal dimension of a rock fracture morphology of the rock; calculating the fractal dimension of the rock; calculating a complexity coefficient Fc of rock fracture of the rock; and characterizing a complexity of rock fracture of the rock based on the complexity coefficient Fc of rock fracture of the rock. In the present invention, combined with the fractal geometry theory, fracture complexity coefficient of shale rocks is redefined and calculated to accurately characterize rock fracture morphology, so that characteristics of rock fracture morphology is correctly understood and affecting factors of fracture morphology is analyzed.Type: GrantFiled: August 23, 2019Date of Patent: February 14, 2023Assignee: Southwest Petroleum UniversityInventors: Cong Lu, Jianchun Guo, Junfeng Li, Yunchuan Zheng, Congbin Yin, Meiping Li, Mingzhong Chen, Zhihong Zhao, Kun Wang, Chi Chen, Chuhao Huang, Li Ma, Fenglan Huang, Ye Zhong
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Patent number: 11568111Abstract: The present invention discloses a numerical simulation method for proppant transport considering wall-retardation effect, comprising the followings: establish a physical model of laboratory experiment on proppant transport with a large flat-panel device; establish a drag coefficient model considering wall-retardation effect according to the numerical simulation experiment; establish a computational geometric model; set boundary conditions and physical parameters of the geometric model according to the two-fluid simulation method for solid proppant quasi-fluidization; verify the grid independence of the computational geometric model to obtain the transport characteristics and placement pattern of the proppant in fractures. The present invention employs a numerical simulation method to study the migration and distribution patterns of proppant under the retardation effect of narrow walls during the hydraulic fracturing.Type: GrantFiled: May 26, 2022Date of Patent: January 31, 2023Assignee: Southwest Petroleum UniversityInventors: Hangyu Zhou, Jianchun Guo, Tao Zhang, Kun Sun, Mingyong Zeng
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Publication number: 20220391567Abstract: The present invention discloses a numerical simulation method for proppant transport considering wall-retardation effect, comprising the followings: establish a physical model of laboratory experiment on proppant transport with a large flat-panel device; establish a drag coefficient model considering wall-retardation effect according to the numerical simulation experiment; establish a computational geometric model; set boundary conditions and physical parameters of the geometric model according to the two-fluid simulation method for solid proppant quasi-fluidization; verify the grid independence of the computational geometric model to obtain the transport characteristics and placement pattern of the proppant in fractures. The present invention employs a numerical simulation method to study the migration and distribution patterns of proppant under the retardation effect of narrow walls during the hydraulic fracturing.Type: ApplicationFiled: May 26, 2022Publication date: December 8, 2022Applicant: Southwest Petroleum UniversityInventors: Hangyu ZHOU, Jianchun GUO, Tao ZHANG, Kun SUN, Mingyong ZENG
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Patent number: 11408281Abstract: A method for determining sand pumping parameters based on width distribution of fracture, including: acquire basic parameters of a target reservoir, simulate a propagation of the fracture, and obtain a propagation pattern and width distribution of the fracture; determine a maximum proppant particle size for entering the fracture at all width levels according to statistical results of the width distribution of the fracture; determine a multi-size combination of proppants according to a mapping table for particle size vs mesh of proppants, and determine an initial ratio of the proppant with each particle size; conduct a numerical simulation of proppant transportation in the fracture to determine a retention ratio of the proppants with each particle size; correct the initial ratio of the proppants with each particle size; calculate an amount of the proppants with each particle size according to the final ratio and the sand pumping intensity and fracturing interval length.Type: GrantFiled: December 2, 2021Date of Patent: August 9, 2022Assignee: SOUTHWEST PETROLEUM UNIVERSITYInventors: Qianli Lu, Jianchun Guo, Zhuang Liu, Le He, Songgen He, Yong Ren, Ji Zeng, Shouyi Wang, Shan Ren
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Publication number: 20220090495Abstract: A method for determining sand pumping parameters based on width distribution of fracture, including: acquire basic parameters of a target reservoir, simulate a propagation of the fracture, and obtain a propagation pattern and width distribution of the fracture; determine a maximum proppant particle size for entering the fracture at all width levels according to statistical results of the width distribution of the fracture; determine a multi-size combination of proppants according to a mapping table for particle size vs mesh of proppants, and determine an initial ratio of the proppant with each particle size; conduct a numerical simulation of proppant transportation in the fracture to determine a retention ratio of the proppants with each particle size; correct the initial ratio of the proppants with each particle size; calculate an amount of the proppants with each particle size according to the final ratio and the sand pumping intensity and fracturing interval length.Type: ApplicationFiled: December 2, 2021Publication date: March 24, 2022Applicant: SOUTHWEST PETROLEUM UNIVERSITYInventors: Qianli Lu, Jianchun Guo, Zhuang Liu, Le He, Songgen He, Yong Ren, Ji Zeng, Shouyi Wang, Shan Ren
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Patent number: 11254859Abstract: An injection method for a solid retarded acid includes mixing a solid acidic substance with a natural polymer, extruding through an extruder to produce particles; putting the produced particles in a coating pan, and sprinkling zinc acetate powder; turning on the coating pan to rotate while irradiating with an infrared lamp; spraying a glycolic acid aqueous solution with a spray gun, and continuing to rotate to obtain the solid retarded acid; injecting non-reactive liquid and the solid retarded acid into the a sand mixing truck; after the mixture is uniformly mixed in the sand mixing truck, injecting the mixture into a formation by a fracturing truck; conveying the solid retarded acid to a designated location, then stopping a pump, removing pipelines, and opening the well for gushing. The method is good in drag reduction, easy for flowback, thereby reducing the construction cost and facilitating environmental protection, and has broad application.Type: GrantFiled: July 22, 2020Date of Patent: February 22, 2022Assignee: SOUTHWEST PETROLEUM UNIVERSITYInventors: Shibin Wang, Peng Shi, Fuhu Chen, Zhi Wang, Yongchun Zhang, Binwei Xu, Shenyan Gou, Feng Zhao, Jianchun Guo
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Patent number: 11199483Abstract: The present invention discloses a method for experimentally determining the influence of acid liquor on the Young modulus of compact carbonate rock.Type: GrantFiled: April 3, 2018Date of Patent: December 14, 2021Assignee: SOUTHWEST PETROLEUM UNIVERSITYInventors: Bo Gou, Jianchun Guo, Zhuang Liu, Xiao Li, Mingyong Zeng, Li Zhan
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Patent number: 11130108Abstract: The invention discloses a testing device and method for evaluating effects of CO2 reaction rate of acid rock plate. The testing device includes an acid fluid conveying unit, a CO2 conveying unit, a mixing tank, a plate holder, a recycling fluid tank, and a vacuum pump. The mixing tank includes an acid fluid inlet, a CO2 inlet, and a miscible fluid outlet. The acid fluid inlet is connected with the acid fluid conveying unit, the CO2 inlet is connected with the CO2 conveying unit, the miscible fluid outlet is connected with the plate holder, the plate holder is connected with the recycling fluid tank, and the recycling fluid tank is connected to the vacuum pump. The CO2 conveying unit includes a CO2 cylinder and a gas booster pump which is connected to the cylinder. The outlet of the pump is connected to the gas inlet of the mixing tank.Type: GrantFiled: May 20, 2020Date of Patent: September 28, 2021Assignee: SOUTHWEST PETROLEUM UNIVERSITYInventors: Jianchun Guo, Xiao Li, Chao Liu, Bo Gou, Xiangzeng Wang, Shiyan Hao, Ruimin Gao, Feng Shen, Nianxi Wang, Jinqiao Wu, Jun Ni
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Publication number: 20210238473Abstract: The present invention relates to an injection method for a solid retarded acid. The injection method comprises the following steps: (1) uniformly mixing a solid acidic substance with a natural polymer according to a mass ratio of (0.2 to 1.Type: ApplicationFiled: July 22, 2020Publication date: August 5, 2021Inventors: Shibin WANG, Peng SHI, Fuhu CHEN, Zhi WANG, Yongchun ZHANG, Binwei XU, Shenyan GOU, Feng ZHAO, Jianchun GUO