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公开(公告)号：US10976275B2
公开(公告)日：2021-04-13
申请号：US16729894
申请日：2019-12-30
Applicant: PetroChina Company Limited
Inventor： Lichun Kuang , Dongming Zhi , Yong Song , Zhongchun Sun , Zhenlin Wang , Wei Wang , Rui Mao , Ni Zhang , Zhijun Qin , Qiusheng Chang , Haiming Wang
Abstract: Provided is a method for determining effective porosity of high clay-bearing rock core, comprising: acquiring a saturated sample NMR T2 spectrum of a high clay-bearing rock core sample, which is measured when temperature of saturated aqueous solution reaches a preset temperature after rock core sample saturated with water being immersed into the saturated aqueous solution and placed and heated in constant temperature and humidity environment; determining a nuclear magnetic total porosity of rock core sample according to the saturated sample NMR T2 spectrum; acquiring permeability and NMR T2 spectrum of the rock core sample placed in the constant temperature and humidity environment and dried until different time; generating cross-plot of permeability and nuclear magnetic porosity; determining first porosity and second porosity; and determining an effective porosity of the h rock core based on the first porosity, the second porosity, and the nuclear magnetic total porosity.
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公开(公告)号：US10935678B2
公开(公告)日：2021-03-02
申请号：US16016710
申请日：2018-06-25
Inventor： Dewen Zheng , Zhide Wu , Guosheng Ding , Huayin Zhu , Jianfeng Liu , Lina Ran , Tong Lin
Abstract: The invention discloses a monitoring system for deformations and destructions of a gas storage, including an acoustic emission sensor installed in a borehole of a monitored rock mass and a ground workstation. The acoustic emission sensor includes an acoustic emission probe and a probe installation mechanism for installing the acoustic emission probe and a transmission mechanism for transmitting the probe installation mechanism. The probe installation mechanism includes a shell, a probe sleeve and two sets of pistons hydro-cylinder components. The present invention realizes the control of the moving direction of the shell and the probe sleeve by the piston hydro-cylinder component and the hydraulic pump, thus solving the problem of effective installation and coupling of the acoustic emission probe, ensuring the effective coupling between the acoustic emission probe and the wall of the borehole.
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73.发明申请公开(公告)号：US20210041588A1
公开(公告)日：2021-02-11
申请号：US16988019
申请日：2020-08-07
Applicant: PETROCHINA COMPANY LIMITED
Inventor： Qilin CHEN , Xingmiao YAO , Changkuan NI , Bo YAN , Huaqing LIU , Guangmin HU , Zhong HONG , Haichao JIAO
Abstract: The present disclosure discloses a method for identifying a boundary of a sedimentary facies, a computer device and a computer readable storage medium. The method comprises: acquiring a preliminary marked result of the sedimentary facies in a seismic attribute map; acquiring a color-based K-means classification result of the seismic attribute map by using a maximal between-cluster variance and a K-means clustering; acquiring a super-pixel classification result of the seismic attribute map according to a SLIC super-pixel segmentation; and performing a region growing fusion on the super-pixel classification result by taking the preliminary marked result and the K-means classification result as constraints, to determine an identification result of the boundary of the sedimentary facies in the seismic attribute map.
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公开(公告)号：US20210040827A1
公开(公告)日：2021-02-11
申请号：US16824966
申请日：2020-03-20
Applicant: PetroChina Company Limited
Inventor： Xinglong Chen , Qingxin Song , Zhidong Yang , Shanyan Zhang , Zemin Ji , Yulong Pu
Abstract: A method and an apparatus for oil production by increasing resistance of borehole wall for improving an energy utilization rate of injection gas includes injecting gas into an oil reservoir so that a gas pressure in the oil reservoir reaches an initial oil reservoir pressure. The initial oil seepage pressure is present at a position where the inside of the production well is in communication with the oil reservoir. The initial oil seepage pressure is less than the initial oil reservoir pressure. The method also includes monitoring gas production and oil production of the production well and increasing the initial oil seepage pressure to an increased oil seepage pressure when a ratio of the gas production to the oil production is higher than a predetermined ratio. The increased oil seepage pressure is smaller than the initial oil reservoir pressure.
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75.发明申请公开(公告)号：US20210010356A1
公开(公告)日：2021-01-14
申请号：US16849283
申请日：2020-04-15
Applicant: PETROCHINA COMPANY LIMITED
Inventor： Xinglong CHEN , Jingyao WANG , Chengming ZHANG , Shitou WANG , Jiazhong WU , Zhong REN
IPC: E21B43/16
Abstract: The disclosure provides a gasflow distribution device, a gas distributor, a pipe string and a method for separate-layer gas injection. The device includes an outer pipe, a gland, a filter screen, and a filling block with a pore structure; the outer pipe is a hollow outer pipe, used for containing the filling block, with an open upper end and a lower end with a bottom of which the center part is provided with a bottom hole, wherein the filling block is sealed to the inner wall of the outer pipe; the gland has a bottom end provided with a circular groove for setting the filter screen, and a top end distributed evenly with a plurality of top holes through the gland; and the gland is connected to the outer pipe, and the filter screen is pressed tightly against the filling block after the gland is connected to the outer pipe.
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Patent Agency Ranking
公开(公告)号：US10816532B2
公开(公告)日：2020-10-27
申请号：US16389481
申请日：2019-04-19
Applicant: PetroChina Company Limited
Inventor： Guangyou Zhu , Shunlin Tang
Abstract: The present disclosure relates to a method and device for detecting mercury isotopes in crude oil. The device comprises an enrichment-absorption system and a secondary purification-enrichment system for mercury isotopes, wherein the enrichment-absorption system includes an air-background mercury absorption system, a pyrolysis/cracking system, a mercury-sample absorption system connected in series with pipe lines, and a vacuum pump, and the vacuum pump is connected to the mercury-sample absorption system through a pipe line; the secondary purification-enrichment system includes a nitrogen-gas cylinder, a collection bottle with potassium permanganate absorption liquid, and a secondary enrichment-absorption bottle connected in series with pipe lines, wherein the secondary purification-enrichment system further includes a stannous-chloride storage bottle, which is connected to a pipe line between the nitrogen-gas cylinder and the collection bottle with potassium-permanganate absorption liquid via a peristaltic pump and through a pipe line.
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公开(公告)号：US10800892B2
公开(公告)日：2020-10-13
申请号：US16219723
申请日：2018-12-13
Applicant: China University of Petroleum-Beijing , KMS OIL FIELD CHEMICALS & TECHNICAL SERVICES LTD. BEIJING , Zhong Shi Da Engineering Research Center Co. Ltd. , PetroChina Company Limited
Inventor： Fujian Zhou , Erdong Yao , Jiangwen Xu , Zhao Luo , Yuan Li , Xiuhui Li , Jiaxin Sun , Xiongfei Liu , Jie Zuo , Xugang Wang , Cuihong Zhou
Abstract: A nano-emulsion composition having a small particle size and ultra-low concentration and a preparation method thereof is disclosed. The raw materials of the composition comprise, in terms of percentage by weight, 0.002% to 0.2% of a polymer-containing homogeneous microemulsion, water, and 99.998% to 99.8% of an organic salt solution or inorganic salt solution. The composition is prepared by diluting a polymer-containing homogeneous microemulsion with water or a salt solution. The polymer-containing homogeneous microemulsion is formed by mixing the following raw materials, in terms of percentage by weight: 8% to 40% of a surfactant, 0.5% to 10% of a polymer, 10% to 30% of an alcohol, 3% to 30% of an oil, 0% to 20% of a salt, and balance of water. The composition of the invention is low in concentration, low in cost, narrow in particle size distribution, good in stability, simple in preparation, and convenient for storage and use.
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78.发明授权公开(公告)号：US10800717B2
公开(公告)日：2020-10-13
申请号：US16010005
申请日：2018-06-15
Applicant: PetroChina Company Limited
Inventor： Chunxia Che , Yulong Liang , Ying Qian , Wei Han , Feng Zhang , Galian Gou , Xilin Jing , Xiaoxin Chang , Qiang Gui , Lifen Gu , Wei Xie , Zhongdong Zhang , Dehua Huang , Duping Tan , Yuan Gao , Lin Cheng
IPC: C07C5/09 , B01J23/50 , B01J23/52 , B01J23/62 , B01J23/89 , B01J35/10 , B01J35/00 , B01J37/02 , B01J35/02 , B01J37/18
Abstract: The present invention relates to a palladium-based supported hydrogenation catalyst and a preparation method and application thereof. The catalyst is prepared by the following method: impregnating an Al2O3-containing carrier with an organic solution containing a bipyridine derivative having hydroxy group, optionally drying followed by impregnating with a mixed solution containing the main active component palladium ions and the auxiliary active component Mn+ ions, where M is one selected from Ag, Au, Ni, Pb and Cu; and then optionally drying, and calcining to obtain the catalyst. The preparation method provided by the present invention allows Pd atoms and M atoms to be highly uniformly dispersed on the carrier, which overcomes the adverse impact of the surface tension of the impregnation solution and the solvation effect on the dispersibility of active components. The palladium-based supported hydrogenation catalyst provided by the present invention has excellent hydrogenation activity, ethylene selectivity and anti-coking performance, and can be used in a selective hydrogenation process of C2 fraction.
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79.发明申请公开(公告)号：US20200300082A1
公开(公告)日：2020-09-24
申请号：US16899546
申请日：2020-06-11
Applicant: SOUTHWEST PETROLEUM UNIVERSITY , PETROCHINA COMPANY LIMITED
Inventor： Pingli Liu , Xiang Chen , Heng Xue , Honglan Zou , Liqiang Zhao , Nianyin Li , Daocheng Wang , Zhifeng Luo , Juan Du , Chong Liang , Mingyue Cui , Fei Liu , Changlin Zhou , Rong Zeng
Abstract: The invention discloses a calculation method for dynamic fluid loss of acid-etched fracture considering wormhole propagation, which is applied to pad acid fracturing process, comprising the following steps: Step 1: dividing the construction time T of injecting acid fluid into artificial fracture into m time nodes at equal intervals, then the time step Δt=T/m and tn=nΔt, where, n=0, 1, 2, 3, . . . , m, and to is the initial time; Step 2: calculating the fluid loss velocity vl(0) in the fracture at t0; Step 3: calculating the flowing pressure distribution P(n) in the fracture at tn; Step 4: calculating the width wa(n) of acid-etched fracture at tn; Step 5: calculating the wormhole propagation and the fluid loss velocity vl(n) at tn; Step 6: substituting the fluid loss velocity vl(n) into Step 3, and repeating Step 3 to Step 6 in turn until the end of acid fluid injection.
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公开(公告)号：US20200249216A1
公开(公告)日：2020-08-06
申请号：US16776773
申请日：2020-01-30
Applicant: PetroChina Company Limited
Inventor： Hua Tian , Caineng Zou , Shuichang Zhang , Shaobo Liu , Xuesong Lu , Zhichao Yu
Abstract: The present invention a method for determining the gas saturation of a tight reservoir. The method comprises the steps of: determining the pore size distribution of the tight reservoir rock sample, and calculating the free water saturation; calculating the water-membrane water saturation; calculating the corner water saturation; calculating the gas saturation of the tight reservoir rock sample according to the following equation: Sg=100−Sw wherein Sw is the water saturation in %; Sw is the sum of the free water saturation, the water saturation and the corner water saturation; Sg is the gas saturation in %. The method for determining the gas saturation of a tight reservoir uses model calculations, which avoids errors in the determination results of the gas saturation caused by water volatilization, surface adsorption, and observation of water flow during experiments.
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