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公开(公告)号：US11505734B2
公开(公告)日：2022-11-22
申请号：US16691942
申请日：2019-11-22
Applicant: PetroChina Company Limited
Inventor： Xiangfei Geng , Bin Ding , Jianhui Luo , Bo Huang , Jianyong Xie , Pingmei Wang , Yongcan Peng , Baoliang Peng
Abstract: A nonionic Gemini surfactant, (octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether has a structural formula of: and is prepared by a two-step reaction: S1, diphenyl ether 4,4′-dicarboxylic acid is subjected to an acyl chlorination reaction to obtain diphenyl ether 4,4′-dicarbonyl dichloride; S2, diphenyl ether 4,4′-dicarbonyl dichloride is subjected to an esterification reaction with octylphenol polyoxyethylene ether (OP-10) to obtain the target product (octylphenol polyoxyethylene ether disubstituted) dicarboxylic acid diphenyl ether. The surfactant is expected to be applied in tertiary oil recovery as an alkali/surfactant, in polymer/surfactant binary composite flooding, in alkali/surfactant/polymer ternary composite flooding, as a microemulsion emulsifier and the like, and it can also be compounded with a common surfactant to reduce the use cost, and thus create conditions for its large-scale application.
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公开(公告)号：US11415721B2
公开(公告)日：2022-08-16
申请号：US16428641
申请日：2019-05-31
Inventor： Jiahuan He , Keming Zhou , Li Zeng , Yong Duan , Nong Li , Fusen Xiao , Hongbin Chen , Huajie Yu , Chunyan Zou
Abstract: The present disclosure discloses a resistivity measurement method, device and system. The method comprises: placing a core to be measured into the core holder after a 100% saturated water treatment, and injecting a predetermined confining pressure by the confining pressure pump; turning on the displacement source to carry out a displacement, and at an interval of a predetermined time period, acquiring a current value by the ammeter and a voltage value by the voltmeter; determining a resistivity of the core according to the current value, the voltage value, an arc length of the curved electrode, and a radius and a length of the core. The present disclosure can realize a rock resistivity measurement in a vertical direction under formation conditions for a plunger-type core, without needing to change the core preparation technology or method.
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公开(公告)号：US20220205346A1
公开(公告)日：2022-06-30
申请号：US17606836
申请日：2020-09-15
Applicant: PetroChina Company Limited , Sichuan Shengnuo Oil. And Gas Engineering Technology Service Co., Ltd
Inventor： Jun Xie , Huiyun Ma , Jian Yang , Chenggang Yu , Yukun Fu , Qiang Yin , Kui Li , Yuan Jiang , Dezheng Yi , Yanyan Liu , Haifeng Zhong , Xiaodong Liu
Abstract: A downhole throttling device based on wireless control includes an inlet nozzle, a throttling assembly, an electrical sealing cylinder, a gas guide cylinder, a lower adapter sleeve, an end socket, a female sleeve, and electrical components. The inlet nozzle is connected to the throttling assembly, the throttling assembly is connected to the electrical sealing cylinder and the gas guide cylinder, the electrical sealing cylinder and the gas guide cylinder are both connected to the lower adapter sleeve, the lower adapter sleeve is respectively connected to the end socket and the female sleeve, and the electrical components are arranged in the electrical sealing cylinder. A throttling effect is achieved by detecting the temperature and pressure in a tube by a temperature/pressure sensor in the electrical components and controlling a motor to rotate a movable valve in the throttling assembly by a circuit control assembly, thereby achieving wireless control over downhole throttling.
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114.发明授权公开(公告)号：US11255182B2
公开(公告)日：2022-02-22
申请号：US16830723
申请日：2020-03-26
Applicant: PetroChina Company Limited
Inventor： Chuan Hai , Chengwen Xiao , Qiang Chen , Shengqiang Zhang , Zhenyuan Luo , Peng Liu , Ni Liu , Hongbo Guo
IPC: E21B47/047 , E21B47/06 , E21B47/022 , G01V9/00 , G01N33/28 , E21B43/26 , E21B43/11
Abstract: A method for determining an oil-gas-water interface based on the formation pressure equivalent density. The method comprising: determining working parameters of the wireline modular formation tester based on the acquired conventional logging data of a block to be studied; acquiring a series of formation pressure and corresponding depth data based on the working parameter; computing formation pressure equivalent densities at different depths based on the formation pressure and the corresponding depth data; drawing a crossplot of the formation pressure equivalent density and the depth according to the formation pressure equivalent density and the corresponding depth data at the different depths; and determining the oil-gas-water interface according to the position of breaking point of the formation pressure equivalent density on the crossplot of the formation pressure equivalent density and the depth.
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115.发明授权公开(公告)号：US11174424B2
公开(公告)日：2021-11-16
申请号：US16691944
申请日：2019-11-22
Applicant: PetroChina Company Limited
Inventor： Bin Ding , Xiangfei Geng , Jianhui Luo , Yang Shi , Jianyong Xie , Bo Huang , Yang Gao , Pingmei Wang , Baoliang Peng
IPC: C09K8/584
Abstract: The invention discloses a core-shell structured anionic nano microemulsion system, and preparation and application thereof. The system comprises an anionic Gemini surfactant, an oil phase material, a solubilizer and water; wherein the microemulsion has a core-shell structure, with the outer shell being an anionic Gemini surfactant, and the inner core being an oil phase material. The anionic Gemini surfactant is N,N,N′,N′-dodecyl tetrasubstituted diphenyl ether sulfonate having the structural formula: The anionic nano-microemulsion system of the present invention is homogeneous and transparent, has a spherical core-shell structure, has a nanometer size (3 to 40 nm) as droplets, has a narrow particle size distribution, is not easy to agglomerate, has good stability, and has an ultra-low interfacial tension and a capability of reducing viscosity of crude oil.
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Patent Agency Ranking
公开(公告)号：US11137508B2
公开(公告)日：2021-10-05
申请号：US16102774
申请日：2018-08-14
Inventor： Dewen Zheng , Zhide Wu , Guosheng Ding , Huayin Zhu , Jianfeng Liu , Lina Ran , Tong Lin
Abstract: The present invention describes a mechanical coupling microseismic monitoring system, which includes at least one microseismic sensor, push rods that are arranged at both ends of the microseismic sensor through a first connection mechanism to send the microseismic sensor into the monitoring hole, introduction mechanisms that are mounted on the push rods for introducing the microseismic sensor into the monitoring hole, and one microseismic monitoring computer that receives signals from the microseismic sensor; the microseismic sensor is a recoverable microseismic sensor; the first connection mechanism is a connection mechanism that can make the push rod swing relative to the microseismic sensor; the introduction mechanism is a three-roller introduction mechanism. The present invention meets the requirement of microseismic monitoring for different parts of deep monitoring hole using multiple microseismic sensors.
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公开(公告)号：US20210277741A1
公开(公告)日：2021-09-09
申请号：US17039909
申请日：2020-09-30
Applicant: PetroChina Company Limited
Inventor： Xiaowei Xue , Jianguo Yao , Zhiguo Wang , Guofu Ren , Xiangjun Hu , Siwen Guo , Minqi Zhao , Changqing Feng , Kai Li , Penggang Huang
IPC: E21B33/12 , E21B23/06 , E21B23/01 , E21B33/129
Abstract: A metal-based dissolvable ball seat comprises a mandrel, a tail base, a sliding body, a slip and a sealing ring. The mandrel can be disengaged from the tail base under predefined shearing force. The sliding body is disposed to sleeve the mandrel and located above the tail base; the slip is disposed outside the mandrel and slidably abutted against the tail base and the sliding body respectively; the slip and the sliding body are slidably abutted against each other through a first conical surface structure, and/or the slip and the tail base are slidably abutted against each other through a second conical surface structure; the sealing ring is movable along axial direction of the mandrel together with the slip; when the sliding body and the tail base are approaching each other, the slip opens up and the sealing ring expands outward. A setting system and a setting method are provided.
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公开(公告)号：US11097239B2
公开(公告)日：2021-08-24
申请号：US16691946
申请日：2019-11-22
Applicant: PetroChina Company Limited
Inventor： Bin Ding , Xiangfei Geng , Jianhui Luo , Yang Shi , Bo Huang , Jianyong Xie , Yang Gao , Pingmei Wang , Baoliang Peng
Abstract: The invention discloses a core-shell structured non-ionic nanoemulsion system and the preparation and use thereof. The system comprises a non-ionic gemini surfactant, an oil phase material, a solubilizer, and water; wherein the microemulsion has a core-shell structure, with the outer shell being the non-ionic Gemini surfactant, and the inner core being the oil phase material. The non-ionic Gemini surfactant is di(octylphenol polyoxyethylene ether)-substituted dicarboxylic acid diphenyl ether having the structural formula: The non-ionic nanoemulsion system of the present invention is homogeneous and transparent, and has a spherical core-shell structure with nanometer-sized (3-40 nm) droplets, narrow particle size distribution, low tendency to agglomerate, good stability, and both an ultra-low interfacial tension and the ability to reduce viscosity of crude oil.
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公开(公告)号：US11086034B2
公开(公告)日：2021-08-10
申请号：US16159052
申请日：2018-10-12
Applicant: PetroChina Company Limited
Inventor： Ning Li , Hongliang Wu , Zhou Feng , Peng Liu , Kewen Wang , Qingfu Feng , Yusheng Li
IPC: G01V1/30 , G01V3/20 , G01V11/00 , E21B49/00 , G01V1/50 , G16Z99/00 , G01N15/08 , G01V3/38 , G01V5/04
Abstract: The embodiments of the present disclosure disclose a method and an apparatus for determining the permeability of the reservoir. The method comprises: acquiring logging data corresponding to the two zones at least; determining the permeability of a specified zone in the two zones at least based on logging data corresponding to the specified zone, wherein the specified zone represents any one of the two zones at least; setting weight values corresponding to the at least two zones respectively; and determining the permeability of the reservoir based on the weight values and the permeability respectively corresponding to the two zones at least. The technical solutions provided by the embodiments of the present disclosure can improve the accuracy of the determined permeability of the reservoir.
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120.发明授权公开(公告)号：US11053427B2
公开(公告)日：2021-07-06
申请号：US16235700
申请日：2018-12-28
Applicant: PetroChina Company Limited
Inventor： Baoqiang Lv , Lijun Mu , Zhenfeng Zhao , Hongjun Lu , Xiangqian Bu , Yin Qi , Jianshan Li , Boping Zhao , Xiangping Li , Jianhui Li , Li'an Yang , Jun Bu
Abstract: A low density, high-strength, degradable temporary plugging agent which includes 60% by weight to 85% by weight of polylactic acid, 5% by weight to 20% by weight of a starch, 5% by weight to 10% by weight of polycaprolactone, 2% by weight to 5% by weight of a solubilizing agent, and 2% by weight to 5% by weight of a toughening agent, based on 100% by weight of the total weight of the agent. The rigid agent can result in bridge plugging in existing cracks, with a significant increase in pressure. The preparation method is simple, the process requirements are low, and industrial production can be realized. When applied to temporary plugging fracturing, under formation conditions, it can be completely degraded within a certain period of time and will not cause secondary damage to the reservoir, while preventing the agent from polluting the formation and the occurrence of pump accidents.
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