公开(公告)号：US20240337579A1

公开(公告)日：2024-10-10

申请号：US18632242

申请日：2024-04-10

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Yisheng HU ,  Lei PU ,  Jin WANG ,  Chenhui SHI

IPC: G01N15/08 ,  G01N29/024 ,  G01N29/14 ,  G01N33/24

CPC classification number: G01N15/0826 ,  G01N15/0806 ,  G01N29/024 ,  G01N29/14 ,  G01N33/24

Abstract: Embodiments of the present disclosure provide a displacement device, comprising a plate model, a cylinder, a circulation component, a confining pressure pump, a displacement component, an acoustic detection component, and a pipeline component. The plate model includes a model cavity and a rock plate disposed in the model cavity, and the rock plate is provided with a sealing member on a surface. The sealing member is provided with an electrode sheet, and acoustic waves generated by the acoustic detection component pass through the rock plate and are received by an acoustic reception assembly. The confining pressure pump applies a confining pressure on the plate model. The pipeline component includes an inner pipeline and an outer pipeline, and a fluid is provided between the outer and the inner pipelines. Cables of the acoustic detection component are provided inside the inner pipeline and are connected to the outside through the inner pipeline.

公开(公告)号：US20240337158A1

公开(公告)日：2024-10-10

申请号：US18337741

申请日：2023-06-20

Applicant: Southwest Petroleum University ,  Nantong Xieming Technology Co., Ltd. ,  Sichuan Xieming Technology Co., Ltd.

Inventor： Jialin TIAN ,  Junyang SONG ,  Lei CHA ,  Heng LI ,  Yanniu REN ,  Chunyu XING ,  Lin YANG ,  Long RAN

IPC: E21B4/04 ,  E21B4/00 ,  E21B21/08 ,  E21B44/00 ,  E21B47/00

CPC classification number: E21B4/04 ,  E21B4/003 ,  E21B4/006 ,  E21B21/08 ,  E21B44/005 ,  E21B47/00

Abstract: The disclosure concerns oil drilling technology, and specifically an all-metal intelligent control motor (AMIM). The AMIM comprises an electric control module, a power module and a transmission module. The electric control module determines the axial position of the connecting rod valve through an electromagnet and controls the connection between the connecting rod valve and the piston through an electric motor. The hydraulic pressure of drilling fluid and the spring reaction force in the power module push a double worm to move axially and circumferentially under the action of internal teeth on the inner surface of shell. A one-way bearing ensures that the power module only transmits unidirectional motion. The transmission module axially limits the power module through TC bearings and transmits circumferential motion, drilling pressure and torque to the lower drilling tool. The AMIM is suitable for all kinds of deep well exploration, with a stronger drilling force, a lower cost and a higher applicability.

公开(公告)号：US20240328301A1

公开(公告)日：2024-10-03

申请号：US18620276

申请日：2024-03-28

Applicant: Southwest Petroleum University

Inventor： Xiaohua TAN ,  Taixiong QING ,  Xiaoping LI ,  Lei DING ,  Xian PENG ,  Longxin LI

IPC: E21B47/005 ,  E21B47/07 ,  E21B47/08 ,  E21B47/117

CPC classification number: E21B47/005 ,  E21B47/07 ,  E21B47/08 ,  E21B47/117 ,  E21B2200/20

Abstract: The present disclosure provides a method for predicting a water invasion frontier for a complex well in a bottom-water gas reservoir. The technical solution is as follows: with consideration of forms of different well types and a gravitational pressure drop in production, a coupled permeability of a corresponding well type acting on a gas-water interface under the action of a baffle plate is expressed by using an equivalent percolation resistance method; a productivity of each infinitesimal section of the corresponding well type is calculated; a position of the gas-water interface is calculated with an equivalent permeability and a pseudo-productivity as characteristic parameters; water breakthrough is determined when there is a point over a water avoidance height, and a change in water invasion frontier form may be expressed with water quality point position data at this time.

公开(公告)号：US20240327699A1

公开(公告)日：2024-10-03

申请号：US18358879

申请日：2023-07-25

Applicant: Chengdu LEPS Technology Co., Ltd ,  Southwest Petroleum University

Inventor： Jianchun GUO ,  Shan REN ,  Cong LU ,  Bin LIU ,  Shaobin ZHANG ,  Huifei MAO ,  Su DIAO ,  Xueshan YANG ,  Chaojun TANG ,  Junyao RAN ,  Guangyao YANG

IPC: C09K8/68

CPC classification number: C09K8/68 ,  C09K2208/28

Abstract: 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.

公开(公告)号：US12092558B1

公开(公告)日：2024-09-17

申请号：US18678292

申请日：2024-05-30

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Zhouhua Wang ,  Hanmin Tu ,  Xintong Zhang ,  Ping Guo ,  Shuoshi Wang ,  Huang Liu ,  Zhicheng Yang ,  Xingliang Deng ,  Zhiliang Liu ,  Yisheng Hu ,  Hongnan Yang ,  Ping Le ,  Tongwen Jiang ,  Guangya Zhu ,  Nan Li

IPC: G01N15/08 ,  E21B49/08

CPC classification number: G01N15/0826 ,  E21B49/087 ,  G01N2203/0044

Abstract: The present invention discloses a gas based testing method for a pore volume compressibility of a low-permeability rock. The method comprises the following steps: obtaining a compressibility and an isothermal adsorption-desorption curve of experimental gas under a reservoir condition; performing a physical simulation experiment by using a steel core drilled with a through hole, and obtaining a gas volume collected due to the deformation of an experimental instrument; then repeating the experiment by using an actual core with the same size, and obtaining pore volumes of the reservoir core under the experimental conditions by deducting deformation of the instrument; and finally, obtaining a pore compressibility of the reservoir core under different reservoir conditions according to the pore volumes of the reservoir core under different reservoir conditions. The present invention considers gas adsorption, corrects errors caused by deformation of a physical simulation device.

公开(公告)号：US20240296204A1

公开(公告)日：2024-09-05

申请号：US18592581

申请日：2024-03-01

Applicant: Southwest Petroleum University ,  China University of Geosciences, Wuhan ,  University of Electronic Science and Technology of China

Inventor： Kun Zhang ,  Shu Jiang ,  Pei Liu ,  Xuri Huang ,  Xiangyu Fan ,  Hong Liu ,  Hu Zhao ,  Jun Peng ,  Xiong Ding ,  Lei Chen ,  Xuefei Yang ,  Bin Li ,  Binsong Zheng ,  Jinhua Liu ,  Fengli Han ,  Xueying Wang ,  Xinyang He ,  Xuejiao Yuan ,  Jingru Ruan ,  Hengfeng Gou ,  Yipeng Liu

IPC: E21B49/00 ,  G06F17/18

CPC classification number: G06F17/18 ,  E21B49/00 ,  E21B2200/20

Abstract: Provided is an analysis method for determining gas-bearing situation of an unknown shale reservoir, includes: S1, selecting a shale reservoir of a target interval of a place; and collecting data of parameters of cores of each of a known gas-bearing shale reservoir A and a known water-bearing shale reservoir B; S2, calculating average values of the parameters of each of the reservoirs A and B respectively; S3, calculating average differences of the parameters of each of the reservoirs; S4, calculating covariance values of the parameters of each of the reservoirs; S5, establishing, according to the covariance values, an equation group and resolving discriminant coefficients; S6, establishing a discriminant equation according to the discriminant coefficients and solving a discriminant index; and S7, obtaining values of parameters of cores of a sample of the unknown shale reservoir, calculating a discriminant value, and determining gas-bearing situation of the unknown shale reservoir.

公开(公告)号：US20240270884A1

公开(公告)日：2024-08-15

申请号：US18560931

申请日：2023-07-14

Applicant: Southwest Petroleum University

Inventor： Ming DUAN ,  Yinan XU ,  Jian ZHANG ,  Shenwen FANG ,  Gang WU ,  Xinliang LI ,  Yuhan WU ,  Mengyuan NIE

IPC: C08F212/08 ,  C08F220/34

CPC classification number: C08F212/08 ,  C08F220/34

Abstract: The present invention discloses a preparation method for an amphiphilic nanosheet. The preparation method comprises the following steps: mixing choline chloride and urea, and heating to prepare a choline chloride-urea based deep eutectic solvent; adding styrene, divinylbenzene and azobisisobutyronitrile into a higher alkane solvent, stirring and dissolving to obtain an oil phase solvent, wherein an addition amount of the divinylbenzene is greater than 5% by mass of a styrene monomer; and adding a hydrophilic monomer, cetyltrimethylammonium chloride and the oil phase solvent into the deep eutectic solvent, stirring and mixing, ventilating and deoxidizing, then heating to 70° C., reacting for at least 6 h, and then crushing and centrifuging to obtain the amphiphilic nanosheet. According to the present invention, a block polymer does not need to be prepared in advance, and a hydrophobic monomer and a hydrophilic monomer are physically isolated, so that the prepared amphiphilic nanosheet has a distinct partition and is not easy to agglomeration. The method is similar to conventional emulsion polymerization, the amphiphilic nanosheet is prepared by a one-step method, and the preparation process is simple; and the method has high product yield and is easy for mass production.

公开(公告)号：US20240228864A1

公开(公告)日：2024-07-11

申请号：US18402787

申请日：2024-01-03

Applicant: Southwest Petroleum University

Inventor： Kun WANG ,  Shouxin WANG ,  Jianchun GUO ,  Chi CHEN ,  Tao ZHANG ,  Xiang BAI ,  Xinghao GOU ,  Jichuan REN ,  Cong LU ,  Bo GOU ,  Jie LAI

IPC: C09K8/72

CPC classification number: C09K8/72

Abstract: 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. According to the present invention, an acid solution injection system is separated from a water injection system, so that only water is injected into the system through a high-pressure pump, effectively solving safety problems of acid solution pumping. In the test process of the present invention, a totally-enclosed acid solution system can ensure that the acid solution does not overflow at high temperature and high pressure, thus greatly increasing the safety of the test.

公开(公告)号：US20240200432A1

公开(公告)日：2024-06-20

申请号：US18541285

申请日：2023-12-15

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Xiyu CHEN ,  Jingze LI ,  Yongming LI ,  Tai CHANG ,  Le HE ,  Juhui ZHU

IPC: G01V1/50 ,  G01V1/22

CPC classification number: G01V1/50 ,  G01V1/226 ,  G01V2210/644

Abstract: A method for predicting a risk of early screen-out in a near-well zone based on distributed fiber acoustic sensing (DAS) is provided. The method comprises: obtaining an acoustic signal during a fracturing process based on distributed optical fibers deployed in a well to be fractured, and obtaining pressure monitoring data based on at least one sensor deployed in the well to be fractured; determining, based on a location of a perforation cluster, and an acoustic signal of the perforation cluster, fracturing fluid flow velocity data of the perforation cluster by a first predetermined algorithm; determining, based on the fracturing fluid flow velocity data of the perforation cluster and perforation parameters of the perforation cluster, a perforation friction resistance pressure drop of the perforation cluster by a second predetermined algorithm; determining a near-well friction resistance pressure drop of the perforation cluster based on a fluid pressure, the perforation friction resistance pressure drop, a slit fluid pressure; determining a near-well friction resistance coefficient of the perforation cluster based on the near-well friction resistance pressure drop of the perforation cluster; and determining, based on the near-well friction resistance coefficient, whether the perforation cluster has the risk of early screen-out in the near-well zone.

公开(公告)号：US12000767B2

公开(公告)日：2024-06-04

申请号：US17057684

申请日：2020-05-18

Applicant: Southwest Petroleum University

Inventor： Shuyong Hu ,  Tingting Qiu ,  Liehui Zhang ,  Yulong Zhao ,  Huiying Tang ,  Xindong Wang ,  Nana Song ,  Xueqiang Guo

IPC: G01N13/00 ,  E21B25/00

CPC classification number: G01N13/00 ,  E21B25/005 ,  G01N2013/003

Abstract: The invention discloses a natural gas diffusion coefficient measurement auxiliary device based on a hand-operated lifting device, comprising a core chamber, a bracket, a core preservation device, and a hand-operated lifting device; the left side of the core chamber is connected with a methane measuring chamber, and the right side of the core chamber is connected with a nitrogen measuring chamber; a rotatable bracket is installed on the lower left side of the core chamber, and the lower right side of the core chamber is connected with the hand-operated lifting device; the core chamber is rotated by the hand-operated lifting device with the support as the center; a horizontal platform at the lower part of the core chamber is provided with a revolving door that can accommodate the left end of the core chamber; a core preservation device is installed at the lower part of the revolving door. The invention has a simple structure, which greatly reduces the time required to load the core during natural gas diffusion coefficient measurement, and can effectively prevent the core from breaking and the rubber sleeve from being damaged.