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Analysis of Offshore Oil Pipeline Floating Laying

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China Ocean Engineering 1994年第1期9卷 95-104页

作者： liang zheng Lecture, southwest petroleum institute, nanchong 637001, Sichun province

-Based on the calculation model for the floating laying of the offshore oil pipeline, this paper analyses in detail the internal force, and deformation of the pipeline under a definite structural form (pipeline and buoy) and the way of pulling. The obtained results can be used for the buoy deployment, structure design, and the determination of pulling parameters (the pulling force of the cable and its length, etc.), providing an effective analysis method for floating pipeline-laying. A calculation example is given to show the related calculation process and the main results are analyzed and discussed.

关键词： buoy offshore oil pipeline floating pipeline-laying pulling state

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多孔介质的应力关系方程——答周大晨先生

新疆石油地质 2002年第2期23卷 163-164页

作者：李传亮西南石油学院石油工程系四川南充637001

上覆岩层压力与下伏岩层中的流体压力以及岩石骨架应力之间,存在着一定的关系。这三者之间到底是什么关系,应该如何进行表述和刻画,出现了不同的认识。这涉及到对多孔介质力学的有效应力这一基本概念的认识和理解,是很重要的问题。基于... 详细信息

上覆岩层压力与下伏岩层中的流体压力以及岩石骨架应力之间,存在着一定的关系。这三者之间到底是什么关系,应该如何进行表述和刻画,出现了不同的认识。这涉及到对多孔介质力学的有效应力这一基本概念的认识和理解,是很重要的问题。基于对多孔介质双重有效应力的研究,重申了多孔介质中任一点处,上述三种应力之间的正确关系,并把相应的数学表达称为多孔介质的应力关系方程。

关键词：多孔介质骨架应力上覆岩层压力孔隙压力岩石力学

New insights into the DPR mechanism of elastic energy released by polymer gel for enhanced oil recovery

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petroleum 2024年第3期10卷 539-547页

作者： Hu Jia Junyi Wu Shaowei Wu Yanbin liang Minghao Wang Xiaojin Wan Pengwu Li State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduChina CNOOC Zhanjiang Branch ZhanjiangChina Oil Production Technology institute of PetroChina Dagang Oilfield Company TianjinChina

Polymer gel was widely used as water shutoff agent in mature oil *** the results of single-phase plugging experiments show that the plugging rate of the polymer gel to the oil phase is lower than that of the water ***,the disproportionate permeability reduction(DPR)mechanism of polymer gels still remains *** this paper,we used four gel formulations including polyethyleneimine(PEI)and phenol-formaldehyde crosslinked gel with and without adding laponite to investigate the effect of gel elastic property on the water shutoff *** result of sand pack flooding experiments shown that the gel with higher elastic modulus has better effects on decreasing water cut and increasing oil *** adding laponite,the elastic modulus of phenol-formaldehyde crosslinked gel increased from 64.2 Pa to 192 Pa,and the elastic modulus of PEI crosslinked gel increased from 27.4 Pa to 36.5 *** to the phenol-formaldehyde-HAPM gel,the oil recovery of laponite-phenol-formaldehyde-HPAM gel increased by 5.2%and the maximum water cut decreased by 8.3%.Besides,comparing with PEI-HPAM gel,the oil recovery of laponite-PEI-HPAM gel increased by 2.7%and the water cut dropped by 27.8%.In the meanwhile,the laponite-phenol-formaldehyde-HPAM gel with higher elastic modulus obviously swells in the formation water but almost remains constant in oil at 105℃.The mass of gel soaked in the formation water increased from 42 g to 96 g and the gel volume increased by 300%within 48 *** study improves the understanding of the DPR mechanism of polymer gel for water shutoff.

关键词： Gel elasticity Water shutoff DPR Laponite Oil recovery

Boosting Peroxymonosulfate Activation via Co-Based LDH-Derived Magnetic Catalysts:A Dynamic and Static State Assessment of Efficient Radical-Assisted Electron Transfer Processes

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Energy & Environmental Materials 2024年第05期7卷 305-316页

作者： Wenhan Yang Junming Xia Fanfan Shang Ge Ge Yang Bin Wang Hairui Cai Lingyun Jing Hao Zhu Shengchun Yang Chao liang Guosheng Shao MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of Physics National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology Xi’an Jiaotong University State Key Laboratory of Organic Electronics and Information Displays & institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications College of petroleum and Chemical Engineering Lanzhou University of Technology Key Laboratory of Western China’s Environmental Systems (Ministry of Education) and Gansu Engineering Research Center of Fine Particles Pollution Control Technology and Equipment College of Earth and Environmental Sciences Lanzhou University State Center for International Cooperation on Designer Low-Carbon & Environmental Materials (CDLCEM) School of Materials Science and Engineering Zhengzhou University

Heterogeneous catalysts promoting efficient production of reactive species and dynamically stabilized electron transfer mechanisms for peroxomonosulfates （PMS） still lack systematic investigation. Herein, a more stable magnetic layered double oxides （CFLDO/N-C）, was designed using selfpolymerization and high temperature carbonization of dopamine. The CFLDO/N-C/PMS system effectively activated PMS to remove 99%(k=0.737 min-1) of tetracycline （TC） within 10 min. The CFLDO/N-C/PMS system exhibited favorable resistance to inorganic anions and natural organics, as well as satisfactory suitability for multiple pollutants. The magnetic properties of the catalyst facilitated the separation of catalysts from the liquid phase, resulting in excellent reproducibility and effectively reducing the leaching of metal ions. An electronic bridge was constructed between cobalt （the active platform of the catalyst） and PMS, inducing PMS to break the O-O bond to generate the active species. The combination of static analysis and dynamic evolution confirmed the effective adsorption of PMS on the catalyst surface as well as the strong radical-assisted electron transfer process. Eventually, we further identified the sites where the reactive species attacked the TC and evaluated the toxicity of the intermediates.

关键词： advanced oxidation process degradation mechanisms electron transport layered double hydroxide reactive species

Mechanical characteristics and reservoir stimulation mechanisms of the Gulong shale oil reservoirs, the northern Songliao Basin

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petroleum Science 2024年第3期21卷 2023-2036页

作者： Si-Wei Meng Jia-Ping Tao Tian-Jiao Li Dong-Xu Li Su-Ling Wang Liu Yang Xin Liu Li-Hao liang He Liu PetroChina Research institute of petroleum Exploration Development Beijing100083China National Key Laboratory of Continental Shale Oil Daqing 163002HeilongjiangChina Dalian University of Technology Dalian116024LiaoningChina PetroChina Daqing Oilfield Co.Ltd. Daqing163002HeilongjiangChina Northeast petroleum University Daqing163002HeilongjiangChina China University of Mining and Technology(Beijing) Beijing100083China

Shale oil of the Qingshankou Formation of the Gulong Sag,the northern Songliao Basin,represents the first attempt at large-scale development of pure-shale-type shale oil in *** integrating the multiscale refined reservoir characterization with macro-micro-scale mechanical testing,it is clarified that the Gulong shale is characterized by high clay mineral content,high rock plasticity,highly-developed bedding,and prominent mechanical anisotropy.A three-dimensional(3D)fracture propagation model of hydraulic fracturing was built for the Gulong shale,which fully captures the hydraulic fracture distribution pattern affected by the high bedding density,in-situ stress,and fracturing treatment *** research showed that due to influences of bedding,hydraulic fracturing in the Gulong shale forms a complex fracture morphology featuring the main fracture with multiple perpendicular branches that have different lengths(like the outdoor directional TV antenna);however,the vertical propagation of fractures is inhibited,and the fracture height is commonly less than 10 *** limited stimulated reservoir volume(SRV)is the main problem facing the fracturing stimulation of the Gulong shale *** density has vital effects on fracture morphology,so case-specific fracturing designs shall be developed for shale intervals with different bedding development *** reservoirs with welldeveloped bedding,it is suggested to properly increase the perforation cluster spacing and raise the volume and proportions of viscous fluids of the pad,so as to effectively promote vertical fracture propagation and improve reservoir stimulation *** study integrates multi-scale fine reservoir characterization and macro-micro-scale mechanical testing,as well as the construction and numerical simulation of hydraulic fracturing models for high-density layered shale reservoirs,providing a new approach and methodological framework for the fracturing research of high-density layer

关键词： Shale oil Hydraulic fracturing High bedding density Fracture propagation model

Clay mineral transformation in medium–high maturity shale oil reservoir: a case study of the Qingshankou Formation， Songliao Basin， Northeast China

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Journal of Earth Science 2024年

作者： Xinping liang Xueyu Yao Rukai Zhu Xiaojun Wang Zhijun Jin Changrong Li institute of Energy， Peking University State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development College of Geosciences/National Key Laboratory of petroleum Resources and Engineering， China University of petroleum (Beijing) Research institute of petroleum exploration & Development PetroChina petroleum Exploration and Production Research institute SINOPEC

Currently， significant hurdles lie ahead in China’s lacustrine shale oil exploration and exploitation， particularly due to the high clay mineral content， which severely impacts pore development in organic-rich shales. In this study， we take the medium- to high-maturity shale of the Qingshankou Formation (K2qn) in the Gulong Sag， Songliao Basin， China， as an example and analyze the dynamic evolution of the clay minerals and their effects on pore development by core observations， scanning electron microscopy， X-ray diffraction， physical property and nitrogen adsorptions to provide a valuable reference for the effective evaluation of lacustrine clay-rich shale oil reservoirs. Our findings reveal that the dynamic transformation of clay minerals in the Qingshankou Formation is classified into three stages based on diagenesis， thermal maturity， and mineral characteristics: the initial stage (vitrinite reflectivity (Ro) 1.3%). Clay minerals play crucial roles in controlling shale reservoirs during the rapid transformation process， which is evidenced by the formation of shrinkage fractures， enhanced pore connectivity， increased porosity， and expanded space for shale oil adsorption and storage. In addition， authigenic quartz can form during the transformation of clay minerals， contributing to increased reservoir brittleness and improving the potential for reservoir fracturing.

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提高采收率的注气实验评价体系

新疆石油地质 2002年第5期23卷 408-410页

作者：郭平刘建仪李士伦孙良田李闽西南石油学院特殊气藏开发重点研究室四川南充637001

注气与常规的水驱及其它驱动方式相比有较大的特殊性,近年来由于各种气源的大量发现,越来越多的油田开发探索注气提高采收率的可行性问题。然而目前还未见到系统评价、配套实验及在开发中的应用方面的文献。根据多年研究的经验和国内外... 详细信息

注气与常规的水驱及其它驱动方式相比有较大的特殊性,近年来由于各种气源的大量发现,越来越多的油田开发探索注气提高采收率的可行性问题。然而目前还未见到系统评价、配套实验及在开发中的应用方面的文献。根据多年研究的经验和国内外相关的报道,首先对注气相关配套实验及研究目的进行简要介绍,然后对不同种类的油田和注入介质的实验内容进行分析,为现场注气、室内评价实验内容的设置及研究提供参考。

关键词：注气采收率评价储集层流体相态固相沉积

Geological reservoir and resource potential(10^(13)m^(3))of gas hydrates in the South China Sea

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China Geology 2024年第3期7卷 422-444页

作者： Pi-bo Su Wei Wei Yun-bao Sun Yao-yao Lü Huai Cheng Wei-feng Han Wei Zhang Jin-qiang liang National Engineering Research Center for Gas Hydrate Exploration and Development Guangzhou 511458China Sanya institute of South China Sea Geology Guangzhou Marine Geological SurveySanya 572025China Central Laboratory of Geological Sciences Research Institute of Petroleum Exploration and DevelopmentLangfang 065007China Qingdao institute of Marine Geology Qingdao 266237China Laboratory for Marine Mineral Resources Qingdao Marine Science and Technology CenterQingdao 266237China

A detailed understanding of the distribution and potential of natural gas hydrate(NGHs)resources is crucial to fostering the industrialization of those resources in the South China Sea,where NGHs are *** this study,this study analyzed the applicability of resource evaluation methods,including the volumetric,genesis,and analogy methods,and estimated NGHs resource potential in the South China Sea by using scientific resource evaluation methods based on the factors controlling the geological accumulation and the reservoir characteristics of ***,this study compared the evaluation results of NGHs resource evaluations in representative worldwise sea areas via rational *** results of this study are as follows:(1)The gas hydrate accumulation in the South China Sea is characterized by multiple sources of gas supply,multi-channel migration,and extensive accumulation,which are significantly different from those of oil and gas and other unconventional resources.(2)The evaluation of gas hydrate resources in the South China Sea is a highly targeted,stratified,and multidisciplinary evaluation of geological resources under the framework of a multi-type gas hydrate resource evaluation system and focuses on the comprehensive utilization of multi-source heterogeneous data.(3)Global NGHs resources is n×10^(15)m^(3),while the NGHs resources in the South China Sea are estimated to be 10^(13)m^(3),which is comparable to the abundance of typical marine NGHs deposits in other parts of the *** the South China Sea,the NGHs resources have a broad prospect and provide a substantial resource base for production tests and industrialization of NGHs.

关键词： Reservoir characteristics Natural gas hydrates Gas migration Resource potential Resource evaluation methods Hierarchical evaluation system Volumetric method South China Sea Clean energy exploration engineering

Catalytic Performance of Aquathermolysis and Viscosity Reduction of Heavy Oil over a WO_(3)/ZrO_(2) Solid Acid

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China petroleum Processing & Petrochemical Technology 2024年第3期26卷 82-92页

作者： Ning Haolong Wu Junwen Shen Zhibing Che Chang Tang Ruiyuan liang Shengrong Zhang Juntao Jiang Haiyan Yuan Shibao State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development State Center For Research and Development of Oil Shale ExploitationPetroleum Exploration and Production Research InstituteSINOPECBeijing 100083China Xi’an Key Laboratory of Low-carbon Utilization for High-carbon Resources College of Chemistry and Chemical EngineeringXi’an Shiyou UniversityXi’anShaanxi 710065China College of petroleum Engineering Xi’an Shiyou UniversityXi’anShaanxi 710065China.

Tungstated zirconia(WO_(3)/ZrO_(2))solid acid catalysts with different WO_(3) contents were prepared by a hydrothermal method and then used in the catalytic aquathermolysis of heavy oil from *** WO_(3)/ZrO_(2) solid acid catalyst was characterized by a range of characterization methods,including X-ray diffraction,NH3-temperature programmed desorption,and pyridine infrared *** WO_(3) content of the WO_(3)/ZrO_(2) catalysts had an important impact on the structure and property of the *** the WO_(3) mass fraction was 20%,it facilitated the formation of tetragonal zirconia,thereby enhancing the creation of robust acidic *** is considered to have a strong impact on the catalytic performance of the aquathermolysis of heavy *** the catalyst containing 20%WO_(3) was used to catalyze the aquathermolysis of heavy oil under conditions of 14.5 MPa,340℃,and 24 h,the viscosity of heavy oil decreased from 47266 to 5398 mPa·s and the viscosity reduction rate reached 88.6%.The physicochemical properties of heavy oil before and after the aquathermolysis were analyzed using a saturates,aromatics,resins,and asphaltenes analysis,gas chromatography,elemental analysis,densimeter *** the aquathermolysis,the saturate and aromatic contents significantly increased from 43.3%to 48.35%and 19.47%to 21.88%,respectively,with large reductions in the content of resin and asphaltene from 28.22%to 25.06%and 5.36%to 2.03%,*** sulfur and nitrogen contents,and the density of the oil were significantly *** factors were likely the main reasons for promoting the viscosity reduction of heavy oil during the aquathermolysis over the WO_(3)/ZrO_(2) solid acid catalysts.

关键词： heavy oil aquathermolysis viscosity reduction WO_(3)/ZrO_(2)solid acid catalyst