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1.发明申请公开(公告)号：US20200240252A1
公开(公告)日：2020-07-30
申请号：US16746926
申请日：2020-01-19
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Yongquan HU , Chaoneng ZHAO , Jinzhou ZHAO , Feng HUI , Qiang WANG , Jin ZHAO
IPC: E21B43/267 , E21B41/00
Abstract: The present disclosure discloses an experimental apparatus and method for simulating transport of a sand-carrying fluid in a fracturing fracture. The apparatus may include a spiral proppant transport device, a stirred tank, a screw pump, a liquid transport pump, a pressure gauge, a proppant transport and distribution system, a cyclone desander, a waste liquid recycle container, a proppant recycle container, and a fracturing fluid tank. The spiral proppant transport device may be communicated with the stirred tank. The waste liquid recycle container and the fracturing fluid tank may be communicated with the stirred tank via the liquid transport pump. A bottom end of the stirred tank may be communicated with the proppant transport and distribution system through the screw pump. It is possible to simulate the sand-carrying fluid paved under a closure pressure by setting a computer to precisely control a transparent cuboid fracture member including hydraulic tanks.
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2.发明申请公开(公告)号：US20220205896A1
公开(公告)日：2022-06-30
申请号：US17488536
申请日：2021-09-29
Applicant: Southwest Petroleum University
Inventor： Wenlian XIAO , Yubin YANG , Jitian REN , Wanfen PU , Shuaishuai LIU , Xiao GUO , Yongming LI , Kun WANG , Lingli ZHENG , Jinzhou ZHAO , Yijian CHEN , Quantang FANG
IPC: G01N15/08
Abstract: A high-temperature and high-pressure microscopic visual flowing device and an experimental method are provided by the present disclosure, comprising a seepage simulation system, a micro-displacement and metering system connected to the seepage simulation system, and an image acquisition and analysis system; the seepage simulation system consists of a visual high-temperature and high-pressure kettle, a microscopic core model placed in the visual high-temperature and high-pressure kettle, and glass carriers arranged above and below the microscopic core model; the glass carriers are provided with sealing rubber sleeves, and the visual high-temperature and high-pressure kettle is provided with an annular heating jacket; an outlet of the microscopic core model is provided with a microflow channel which is connected to the micro-displacement and metering system through a pipe, effectively reducing the metering error caused by the dead volume of the pipe.
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3.发明申请公开(公告)号：US20200240243A1
公开(公告)日：2020-07-30
申请号：US16747294
申请日：2020-01-20
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Haitao LI , Na WEI , Jinzhou ZHAO , Luling LI , Zhenjun CUI , Lin JIANG , Wantong SUN , Luyue YANG , Xi LI , Yinghe HONG , Yu QIAO
Abstract: A method for intelligently determining hydrate drilling and production risks based on fuzzy judgment. First classifying monitoring parameters in a hydrate drilling and production process into layers from top to bottom: a target layer, a primary evaluation factor layer and a secondary evaluation factor layer; then calculating relative weight values of each primary evaluation factor and each secondary evaluation factor contained therein; then connecting in series the relative weight values of the primary evaluation factors with the relative weight values of the secondary evaluation factors to obtain an overall weight value of the secondary evaluation factors; repeating the foregoing steps; finally constructing the overall weight value of each secondary evaluation factor of each risk into a column vector to obtain a comprehensive determining weight matrix of hydrate drilling and production risks, and determining the risks in the hydrate drilling and production process by combining monitoring parameter change vectors.
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4.发明公开公开(公告)号：US20230203929A1
公开(公告)日：2023-06-29
申请号：US17694527
申请日：2022-03-14
Applicant: Southwest Petroleum University
Inventor： Xiyu CHEN , Yitao HUANG , Yongming LI , Huibo WEN , Yu PENG , Youshi JIANG , Jinzhou ZHAO
IPC: E21B43/26 , E21B43/267
CPC classification number: E21B43/261 , E21B43/267 , E21B2200/20
Abstract: The present invention discloses a method for realizing uniform stimulation for the oil and gas well by low-cost multi-stage fracturing, comprising the following steps: first calculate and predict the inlet widths of the fracture created in the planned hydraulic fracturing; then design the plugging scheme for blocking the fracture inlet after each fracturing treatment; the selected plugging particles are composed of filling particles and skeleton particles, with designed plugging scheme; after complete the design of plugging scheme, perform the fracturing treatment to create hydraulic fracturing in the reservoir; skeleton particles and filling particles are added into the fractures successively according to plan. The present invention provides a multi-stage single-cluster fracturing method, with the advantages of controllable fracture sizes and low cost. The present invention can realize a good uniformity of stimulation for the oil and gas wells.
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公开(公告)号：US20210222057A1
公开(公告)日：2021-07-22
申请号：US17139022
申请日：2020-12-31
Applicant: SOUTHWEST PETROLEUM UNIVERSITY
Inventor： Xiaojiang YANG , Difei HAN , Jincheng MAO , Heng ZHANG , Chong LIN , Jinhua MAO , Jinzhou ZHAO
Abstract: An emulsifier with high temperature resistance, low viscosity and low corrosiveness, and an emulsified acid system comprising the same. The emulsifier includes a viscoelastic surfactant, which is prepared by a quaterization of fatty acid acyl propyl dimethylamine and a halogenated compound; by a quaterization of a long-chain halogenated hydrocarbon and a tertiary amine compound; or by a reaction of the fatty acid acyl propyl dimethylamine with a linking group synthesized by epichlorohydrin and an alkylamine compound.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20200291754A1
公开(公告)日：2020-09-17
申请号：US16604109
申请日：2018-11-20
Applicant: SouthWest Petroleum University
Inventor： Jinzhou ZHAO , Na WEI , Haitao LI , Liehui ZHANG , Shouwei ZHOU , Qingping LI , Wantong SUN
Abstract: A hydrate solid-state fluidization mining method and system under an underbalanced reverse circulation condition are used for solid-state fluidization mining on a non-rock-forming weak-cementation natural gas hydrate layer in the ocean. Equipment includes a ground equipment system and an underwater equipment system. The construction procedure includes an earlier-stage construction process, pilot hole drilling construction process, reverse circulation jet fragmentation process, underbalanced reverse circulation fragment recovery process and silt backfilling process. Natural gas hydrates in the seafloor are mined through an underbalanced reverse circulation method. Problems such as shaft safety, production control and environmental risks faced by conventional natural gas hydrate mining methods such as depressurization, heat injection, agent injection and replacement are effectively solved. By using the method, the weak-cementation non-rock-forming natural gas hydrates in the seafloor can be mined in environment-friendly, efficient, safe and economical modes, more energy resources can be provided, and energy shortage dilemmas are solved.
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公开(公告)号：US20220290529A1
公开(公告)日：2022-09-15
申请号：US17676264
申请日：2022-02-21
Applicant: Southwest Petroleum University
Inventor： Youshi JIANG , Yan KOU , Yongming LI , Jing JIA , Jinzhou ZHAO
Abstract: The present invention discloses a gas flow rate analysis and prediction method for wellhead choke of gas well based on Gaussian process regression, comprising the following steps of Step 1) acquiring basic data of the wellhead choke on site, Step 2) selecting a kernel function, Step 3) calculating a covariance matrix, Step 4) testing the Gaussian process regression model with the test data sample to calculate a prediction deviation, Step 5) selecting different kernel functions, repeating Steps 2-4, comparing prediction deviations of the different kernel functions, and Step 6) analyzing and predicting the gas flow rate of the wellhead choke of the gas well to be tested. According to the method, the data of the wellhead choke of the gas well can be processed effectively, and the gas flow rate can be predicted accurately under the condition that there is gas-liquid flow rate in the wellhead choke.
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8.发明申请公开(公告)号：US20200300066A1
公开(公告)日：2020-09-24
申请号：US16604106
申请日：2018-11-20
Applicant: SouthWest Petroleum University
Inventor： Jinzhou ZHAO , Na WEI , Haitao LI , Liehui ZHANG , Shouwei ZHOU , Qingping LI , Wantong SUN
Abstract: A natural gas hydrate solid-state fluidization mining method and system under an underbalanced positive circulation condition, used for performing solid-state fluidization mining on a non-rock-forming weak-cementation natural gas hydrate layer in the ocean. Equipment includes a ground equipment system and an underwater equipment system. The construction procedure has an earlier-stage construction process, underbalanced hydrate solid-state fluidization mining construction process and silt backfilling process. Natural gas hydrates in the seafloor are mined through an underbalanced positive circulation method, and problems such as shaft safety, production control and environmental risks faced by conventional natural gas hydrate mining methods such as depressurization, heat injection, agent injection and replacement are effectively solved. By using the natural gas hydrate solid-state fluidization mining method weak-cementation non-rock-forming natural gas hydrates in the seafloor can be mined in environment-friendly, efficient, safe and economical modes, more energy resources are provided, and energy shortage dilemmas are solved.
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公开(公告)号：US20200290052A1
公开(公告)日：2020-09-17
申请号：US16604100
申请日：2018-11-20
Applicant: SouthWest Petroleum University
Inventor： Jinzhou ZHAO , Na WEI , Chunquan LIU , Kaisong WU , Liehui ZHANG , Shouwei ZHOU , Haitao LI , Wantong SUN
Abstract: A crushing system for large-size natural gas hydrate rock samples, which mainly includes a crushing and stirring control subsystem, crushing and stirring execution subsystem and hydrate preparation subsystem. Full automatic control to parameter acquisition and experimental process is achieved by utilizing modern automation technology, including the function of automatically crushing the large-size natural gas hydrate rock samples and also monitoring, collecting and storing the drilling pressure, the torque and the internal furnace pressure and temperature parameters during the crushing process in real time, to provide reliable guarantee for the follow-up researches on crushing mechanism, crushing efficiency, drilling parameter optimization, rock crushing ability evaluation of a crushing tool and the like of the large-size natural gas hydrate rock samples and necessary experimental verification means for optimization of on-site exploiting construction conditions of natural gas hydrate.
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10.发明申请公开(公告)号：US20200283676A1
公开(公告)日：2020-09-10
申请号：US16068134
申请日：2018-01-29
Applicant: Southwest Petroleum University
Inventor： Jincheng MAO , Jinming FAN , Jinzhou ZHAO , Xiaojiang YANG
IPC: C09K8/68 , C07C233/36 , C07C231/12 , C07C233/38 , C07C235/74
Abstract: The present invention discloses a tri-cationic viscoelastic surfactant, a preparation method and an application thereof, and clean fracturing fluid. According to the present invention, N,N′-dimethyl-1,3-propanediamine and epichlorohydrin are used to prepare an intermediate A, and then the intermediate A and a fatty acid amidopropyl dimethylamine is used to prepare the tri-cationic viscoelastic surfactant. The preparation process is simple. And the clean fracturing fluid including the surfactant have excellent temperature and shear resistance, good suspended sand performance, simple on-site preparation, automatic gel breaking, low damage to formation, low cost and simple preparation process. The clean fracturing fluid including the surfactant also has strong temperature resistance, and the viscosity of the product can be maintained at 42 mPa·s after 80 minutes at 180° C. and 170 s−1, which is higher than the viscosity requirement (>25 mPa·s) of the clean fracturing fluid in on-site construction.
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