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Hydrophobic epoxy resin coated proppants with ultra-high self-suspension ability and enhanced liquid conductivity

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petroleum science 2021年第6期18卷 1753-1759页

作者： Fan Fan Feng-Xia Li Shou-Ceng Tian Mao Sheng Waleed Khan Ai-Ping Shi Yang Zhou Quan Xu State Key laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development National Energy Shale Oil Research and Development CenterHarvard SEAS-CUPB Joint Laboratory on Petroleum ScienceChina University of Petroleum(Beijing)Beijing102249China

Proppant is a key material for enhancing unconventional oil and gas production which requires a long distance of migration and efficient liquid conductivity paths within the hydraulic ***,it is difficult to find a proppant with both high self-suspension ability and liquid ***,a simple method is developed to coat epoxy resin onto the ceramic proppant and fabricate a novel coated proppant with high hydrophobicity,self-suspension,and liquid conductivity *** with uncoated ceramic proppants,the epoxy resin coated(ERC) proppant has a high self-suspension ability nearly 16 times that of the uncoated ***,the hydrophobic property and the liquid conductivity of the ERC proppant increased by 83.8% and 16.71%,respectively,compared with the uncoated *** summary,this novel ERC proppant provides new insights into the design of functional proppants,which are expected to be applied to oil and gas production.

关键词： Coated proppant Hydrophobic property Self-suspension Conductivity

Shaly detritus embedded epoxy-resin coated proppants

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petroleum science 2022年第4期19卷 1735-1744页

作者： Zhao-Hui Lu Xiu-Ping Lan Yong Yuan Jian-Kun Zhou Si-Yuan Chen Fan Fan Ying-Chun Niu Shou-Zhen Li Kai-Yi Hu Yang Zhou Quan Xu Key laboratory of Shale Gas Exploration Ministry of Natural ResourcesChongqing Institute of Geology and Mineral ResourcesChongqing401120China State Key laboratory of petroleum Resources and Prospecting Bejing Key Laboratory of Biogas Upgrading UtlizationHarvard SEAS-CUPB Joint Laboratory on Petroleum ScienceChina University of Petroleum(Beijing)Beijing102249China

Proppant plays a significant role in the hydraulic fracturing process, which can affect the production of oil and gas wells. Due to the high density and low adhesion force, the settling speed of traditional proppants is fast, which will lead to the blockage of a crack channel. In this study, a proppant with double layer structure is fabricated by coating epoxy-resin and shaly detritus on ceramic proppants for the first time,respectively. The epoxy-resin enables the shaly detritus to be coated on the proppant successfully, which can provide a new method for shaly detritus treatment. The adhesive ability of shaly detritus and epoxyresin coated proppants(SEPs) is improved by 10.4% under the load force of 500 n N, which prolongs the time for the fracture to close. At the same time, the suspending ability of SEPs is two times higher than the uncoated proppants. Once the guar gum solution concentration is 0.3 wt%, the settling time of SEPs is36.7% longer than that of the uncoated proppants, which can effectively reduce the settlement of proppants in the crack. In addition, the hydrophobicity of the SEPs is enhanced, which reduces the wateroil ratio of crude oil and increases the liquid conductivity tested by deionized water. In summary, this new proppant is expected to promote the development of unconventional oil and gas resources.

关键词： Coated proppant Shaly detritus Hydrophobicity Conductivity

Thermal conductive proppant with self-suspension ability

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petroleum science 2023年第3期20卷 1742-1749页

作者： Guo-Qing Xu Xiu-Ping Lan Si-Si hao Kai-Yi Hu Si-Meng Qi Li-Dong Geng Quan Xu Yang Zhou Sinopec Key laboratory of Drilling Completion and Fracturing of Shale Oil and Gas SINOPEC Research Institute of Petroleum Engineering Co.LtdBejing102249China State Key laboratory of petroleum Resources and Prospecting Bejing Key Laboratoryof Biogas Upgrading UtilizationHarvard SEAS-CUPB Joint Laboratory on Petroleum ScienceChina University of Petroleum(Beijing)Beijing102249China

The in situ mining technology is applied to the exploitation of medium-and low-maturity shale oil,which can use heaters to warm up the oil shale formations and pyrolyze the *** to the low thermal conductivity of oil shale,electric heaters need extra equipment to improve heat transfer *** this study,a thermally conductive proppant is fabricated by coating epoxy-resin and graphite on ceramic proppants for the first time,which could support the fracturing crack and transfer *** thermal conduction property of epoxy-resin and graphite coated proppants(EGPs)is 245%higher than that of uncoated proppants,which can transfer more heat to the oil shale formation and accelerate the conversion of *** adhesive property of EGPs is improved by 47.9%under the load force of 1500 nN,which prolongs the time for the fracture to *** summary,this novel proppant is expected to assist in-situ mining technology in the production of medium and low-maturity shale oil.

关键词： Exploitation of shaleoil In situ mining Technology Thermally conductive proppant Heat transfer

Reversible adhesion surface coating proppant

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Chinese Chemical Letters 2021年第1期32卷 553-556页

作者： Quan Xu Fan Fan Zhaohui Lu Mao Sheng Shouceng Tian Ye Zhang Linhua Pan Yang Zhou State Key laboratory of petroleum Resources and Prospecting Beijing Key Laboratory of Biogas Upgrading UtilizationHarvard SEAS-CUPB Joint Laboratory on Petroleum ScienceChina University of Petroleum(Beijing)Beijing 102249China National joint Engineering Research Center for Shale Gas Exploration and Development Chongqing Institute of Geology and Mineral ResourcesChongqing 401120China

Proppant is a key material in the hydraulic fracturing process,which has been widely used in unconventional oil *** proppants are easy to sedimentate and accumulate at the entrance of shale fracture,which will block the diversion of water,oil and *** proppants(CPs) are fabricated by coating resin on normal ceramic proppants through a simple method,which is dramatically enhanced the supporting properties in shale fracture and easy to scale *** with uncoated ceramic proppants,the self-suspension ability of CPs is ~11 times higher,which are able to migrate and distribute farther and deeper inside the *** the same time,Coating enhanced the 23.7% of adhesive force in maximum,which makes the CPs easier to adhere on the fracture surface to supportthe shale ***,the liquid conductivity of CPs is 60% higher than uncoated ceramic proppants at13.6 MPa *** method is expected to fabricated varieties of proppantsfor shale fracture supporting to improve the exploration of unconventional oil and gas resources.

关键词： Self-suspension Coating Proppants Hydraulic fracturing process Liquid conductivity

Pore structure characterization and its effect on methane adsorption in shale kerogen

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petroleum science 2021年第2期18卷 565-578页

作者： Tian-Yu Wang Shou-Ceng Tian Qing-Ling Liu Gen-Sheng Li Mao Sheng Wen-Xi Ren Pan-Pan Zhang State Key laboratory of petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China harvard seas-cupb joint laboratory on petroleum science 29 Oxford StreetCambridgeMA02138USA China National Oil and Gas Exploration and Development Company Ltd Beijing100034China State Key laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China

Pore structure characterization and its effect on methane adsorption on shale kerogen are crucial to understanding the fundamental mechanisms of gas storage,transport,and reserves *** this study,we use 3D scanning confocal microscopy,scanning electron microscopy(SEM),X-ray nano-computed tomography(nano-CT),and low-pressure N2 adsorption analysis to analyze the pore structures of the ***,the adsorption behavior of methane on shales with different pore structures is investigated by molecular *** results show that the SEM image of the shale sample obviously displays four different pore shapes,including slit pore,square pore,triangle pore,and circle *** average coordination number is 4.21 and the distribution of coordination numbers demonstrates that pores in the shale have high *** with the adsorption capacity of methane on triangle pores,the adsorption capacity on slit pore,square pore,and circle pore are reduced by 9.86%,8.55%,and 6.12%,*** increasing pressure,these acute wedges fill in a manner different from the right or obtuse angles in the other *** study offers a quantitative understanding of the effect of pore structure on methane adsorption in the shale and provides better insight into the evaluation of gas storage in geologic shale reservoirs.

关键词： Shale Methane adsorption Pore structure Kerogen Molecular simulation

NMR fluid analyzer applying to petroleum industry

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petroleum science 2021年第1期18卷 54-91页

作者： Guang-Zhi Liao Wei-Liang Chen Fang-Rong Zong Feng Deng Hua-Bing Liu Bo-Song Wu Wei Liu Zhe Sun Si-Hui Luo State Key laboratory of petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China harvard seas-cupb joint laboratory on petroleum science Cambridge 02138 USA Institute of Biophysics Chinese Academy of Science Beijing 100101 China Research Institute of petroleum Exploration & Development China National Petroleum Corporation Beijing 100083 China Limecho Technology Co. Ltd Beijing 102299 China Department of Radiology and Biomedical Imaging Yale University New Haven 06520 USA

Tremendous progress of developing nuclear magnetic resonance(NMR)fluid analyzer has been witnessed in the oil industry for last two *** device allows extensive and accurate exploration of fluid properties,such as its hydrogen content,composition,viscosity,hydrogen index(HI),mud filtrate invasion,gas to oil ratio,average velocity,velocity distribution etc.,in the situations of in situ downhole or surface *** this review article,we focus on the design principle,manufacturing,implementation,methodology and applications of NMR fluid analyzer to oil and gas industry.A detailed description of the state-of-art NMR fluid analyzers was firstly given to exhibit their respective *** these experiences on hand,we introduced a series of NMR fluid analyzers designed by us at China University of petroleum-Beijing with continuous optimizations,in terms of magnet construction,antenna layout,circuit design and operating *** systems discussed in this article have been demonstrated to achieve multiple NMR parameter acquisition when the fluid is in stationary or flowing *** the end,a prototype was fabricated and validated considering a vast of engineering influences,such as variable temperatures in a large range,high pressure,limited volume,detection efficiency,etc.A particular emphasis of this paper is to expedite the measurement efficiency of the NMR fluid analyzer to reduce the operation *** dilemma can be Figured out by upgrading both pulse sequence and observational *** different fluid states,two rapid pulse sequences were proposed to sufficiently obtain the multi-dimensional NMR correlation ***,two observational modes were developed to take full advantage of the polarization time,during which the individual antenna was systematically *** domain of interest in this review concerns the applications of this new *** stationary fluids case,accurate identification of fluid properties is o

关键词： NMR fluid analyzer petroleum industry Pulse sequence Viscosity Flow

Nanoscale mechanical property of marine and continental organic kerogen in shale

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Chinese Chemical Letters 2020年第2期31卷 509-512页

作者： Quan Xu Rui Zhang Mao Sheng Shouceng Tian Wuguang Li Tianyu Wang Yilin Zhang State Key laboratory of petroleum Resources and Prospecting Harvard SEAS-CUPB Joint Laboratory on Petroleum ScienceBeijing Key Laboratory of Biogas Upgrading UtilizationChina University of Petroleum-BeijingBeijing 102249China Shale Gas Institute of Southwest Oil&Gas Field Company PetroChinaChengdu 610051China C.Eugene Bennett Department of Chemistry West Virginia UniversityMorgantownWest Virginia 26506-6045United States

Kerogen is known as an important organic part for absorbing and forming shale gas whose absorption function,especially mechanical and tribological properties,has not been fully ***,we use Fourier transform infrared(FTIR) and X-ray photoelectron spectroscopy(XPS) analysis to reveal the chemical structure of *** report the first study of the adhesion and friction behavior of kerogen using atomic force microscope(AFM) Nanoman *** finding reveals the friction of kerogen is decreased at higher pressure while is inhibited at increased temperature,and friction decreases logarithmically as the sliding speed *** weakened of Al-O linkage at high temperature have great influence on the decrease of friction forces between kerogen and alumina *** finding lays the mechanism for understanding the dynamic adhesion behavior of kerogen in frictions,therefore attracting increasing interests from scientists,researchers,petroleum engineers and investors.

关键词： Kerogen Friction Atomic force microscope Shale gas Mechanical property

低场核磁共振仪器振铃抑制新方法及其电路实现

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波谱学杂志 2023年第1期40卷 68-78页

作者：师光辉肖立志廖广志罗嗣慧侯学理卢亚普中国石油大学(北京) 油气资源与工程国家重点实验室北京102249 中国石油大学(北京)地球物理学院北京102249 harvard seas-cupb joint lab.on petroleum science CambridgeMA 02138 中国石油集团测井有限公司陕西西安710077

加快天线残余能量释放以减弱天线振铃信号有利于缩短低场核磁共振仪器的回波间隔(TE),从而提高快弛豫组分的测量分辨率和信噪比(SNR).而天线Q值对能量的发射效率和泄放速度起着相反的作用.为此,我们首先设计了一种新型Q转换电路,在保证... 详细信息

加快天线残余能量释放以减弱天线振铃信号有利于缩短低场核磁共振仪器的回波间隔(TE),从而提高快弛豫组分的测量分辨率和信噪比(SNR).而天线Q值对能量的发射效率和泄放速度起着相反的作用.为此,我们首先设计了一种新型Q转换电路,在保证发射效率的同时,可以大大缩短能量泄放时间.在此基础上,应用了一种优化的脉冲序列以弥补传统相位交替对脉冲序列(PAPs)不能消除90脉冲振铃的缺陷,通过相位循环的方法进一步提高了信噪比.最后,在2 MHz岩心分析仪上测试了新型Q转换电路,当天线Q值降为发射期间的约1/5时,天线恢复时间由280.0μs降为18.2μs;而且,使用新型Q转换电路和优化的脉冲序列后,TE=60μs时,可以有效获得快弛豫组分的T2信号.

关键词：低场核磁共振(low-field NMR) Q转换振铃信噪比(SNR) 脉冲序列

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岩石润湿性的核磁共振表征方法与初步实验结果

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地球物理学报 2019年第11期62卷 4472-4481页

作者：梁灿肖立志周灿灿郭龙胡法龙廖广志宋先知戈革油气资源与探测国家重点实验室中国石油大学(北京)北京102249 harvard seas-cupb joint lab. on petroleum science Cambridge MA 02138 USA 中国石油勘探开发研究院北京100083 中国科学院深圳先进技术研究院广东深圳518000 常州工学院土木建筑工程学院江苏常州213000

随着石油勘探开发领域的不断扩大,某些复杂油气藏尤其是致密油气的岩石物理响应,受岩石润湿性变化的影响越来越明显,影响油气藏的评价以及后续勘探开发,识别和评价岩石润湿性成为重要的研究课题.核磁共振弛豫可以有效表征多孔介质孔隙... 详细信息

随着石油勘探开发领域的不断扩大,某些复杂油气藏尤其是致密油气的岩石物理响应,受岩石润湿性变化的影响越来越明显,影响油气藏的评价以及后续勘探开发,识别和评价岩石润湿性成为重要的研究课题.核磁共振弛豫可以有效表征多孔介质孔隙及其流体分布,特别是通过T1-T2弛豫图谱能够获得流体分子与孔隙表面相互作用的信息,进而为孔隙表面润湿性质的判断提供了可能性.本文首先讨论了T1-T2弛豫谱表征孔隙介质润湿强度的理论基础,然后,采用一阶近似方法对孔隙表面流体分子的核磁共振弛豫分布进行正演模拟,建立T1/T2比值法判别孔隙介质润湿性的基本方法.最后,选取玻璃珠和天然砂岩样品进行初步实验,验证方法的合理性.结果表明,当岩石饱和双相流体时,润湿相流体T1/T2值高于非润湿相流体,通过观察不同饱和度状态T1-T2二维图谱的变化,能够判断岩石的润湿性.本文的理论分析与初步实验结果为岩石润湿性研究提供了新的手段,对核磁共振测井探测储层润湿性也具有一定的应用价值.

关键词：储层岩石润湿性核磁共振 T1-T2二维弛豫谱 T1/T2比值