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Homologous layered InFeO3(ZnO)m:new promising abradable seal coating materials

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Rare Metals 2018年第2期37卷 79-94页

作者： Wei-Wei Qu Xiao-Xuan Zhang Bi-Fei Yuan Li-Dong Zhao School of Materials Science and Engineering BeihangUniversityBeijing 100191China china national petroleum corporation greatwall drilling company Beijing 100101China

As promising abradable seal coating materials used in high temperature range, the homologous layered InFeO3（ZnO）m （m = 1, 2, 3...20） have attracted great attention. In this short review, we summary the research progress in InFeO3（ZnO）m that were developed in our group. We first introduced a series of conventional abradable seal coating materials as a research motivation. Second, the phase composition and crystal structures of lnFeO3（ZnO）m system were presented. Then, their thermophysical properties, as the most important part, were introduced in detail. At last, the mechanical properties such as hardness, friction coefficient, erosion wear resistance of InFeO3（ZnO）m system were also described. Our summary indicates that InFeO3（ZnO）m sys- tems are promising abradable seal coating materials.

关键词： Abradable seal coating InFeO3(ZnO)m Thermal conductivity Thermal expansion coefficient Mechanical properties

Characteristics, Distribution Patterns, and Classification of Volcanic Reservoirs in the Huanghua Depression, Bohai Bay Basin, china

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Journal of Earth Science 2024年第05期 1464-1481页

作者： Jian Huang Changqian Ma Shihui Zhang Muyue Xu Da Lou Chongbiao Leng Mutian Qin Hongjun Li State Key Laboratory of Geological Processes and Mineral Resources Faculty of Earth SciencesChina University of Geosciences Chongqing Industry Polytechnic College Institute of Geophysics and Geomatics China University of Geosciences Key Laboratory of Tectonics and petroleum Resources of Ministry of Education China University of Geosciences Dagang Oilfield company China National Petroleum Corporation Hubei Earthquake Agency Yichang Earthquake Monitoring Center Station College of Marine Geosciences Ocean University of China

Identifying volcanic reservoir types and their distribution patterns in volcanic edifices is important for accurate prediction and exploration of hydrocarbon reservoirs. Herein, we analyzed the distribution patterns of different reservoir levels in volcanic edifices, discussed controlling factors, and reclassified reservoir types. This was done using core observations, whole-rock geochemistry, and reservoir physical property analysis, combined with logging, drilling, seismic, and oil-gas test data. Reservoirs can be divided into three classes based on their physical properties. The Mesozoic intermediate and basic rocks formed Class Ⅰ reservoirs, most lithologies formed Class Ⅱ reservoirs, and diabase intrusions and tight volcanic rocks formed Class Ⅲ reservoirs. Reservoirs form in different lithologies in the Huanghua depression due to weathering. Tectonic faults deepen the influence of weathering leading to the formation of reservoirs in tight. Additionally, volcanic rhythms and fractures control the vertical distribution of Cenozoic basaltic reservoirs. Volcanic reservoirs are classified into five types based on the main controlling factors and distribution patterns in volcanic edifices: tectonic-alteration, vesiclefracture, weathered-effusive, weathered-eruptive, and weathered-tectonic types. Among these, the weathered-eruptive type can easily form Class Ⅰ reservoirs, making it the best target for exploration. Whereas the weathered-tectonic and vesicle-fracture types tend to develop Class Ⅱ reservoirs and can be potential targets. The new classification takes into account the relationship between reservoir levels and their distribution in volcanic edifices, it is more conducive to igneous reservoir prediction in the Huanghua depression. This study provides a novel idea for the classification and comparative study of igneous reservoirs in petroliferous basins.

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中国华南三水盆地发现氢气高异常渗出点

Science Bulletin 2024年第9期69卷 1217-1220页

作者：金之钧张盼盼刘润超黄晓伟王晓梅孟庆强刘金侠苏宇通张浩哲 Institute of Energy Peking UniversityBeijing 100871China Peking University Ordos Research Institute of Energy Ordos 017010China State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083China School of Energy and Resources China University of GeosciencesBeijing 100083China Research Institute of petroleum Exploration and Development China National Petroleum CorporationBeijing 100083China Sinopec Star company Limited Beijing 100083China

Natural hydrogen(H_(2))is also known as gold H_(2) and is a carbonfree energy resource with potential exploitation and utilization due to its renewable,environmentally friendly,and cost-effective characteristics[1].Natural H_(2) is distributed extensively worldwide,but varies in content in different regions and under varying geological *** present,only the H_(2) wells in Mali are used for economic production[2,3].

关键词： conditions friendly cost

Impact of Osmotic Pressure on Seepage in Shale Oil Reservoirs

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Fluid Dynamics & Materials Processing 2024年第6期20卷 1365-1379页

作者： Lijun Mu Xiaojia Xue Jie Bai Xiaoyan Li Xueliang Han Oil and Gas Technology Research Institute PetroChina Changqing Oilfield CompanyXi’an710018China

Following large-scale volume fracturing in shale oil reservoirs,well shut-in measures are generally *** tests and field trials have underscored the efficacy of fracturing fluid imbibition during the shut-in phase in augmenting shale oil *** conventional reservoirs,shale oil reservoirs exhibit characteristics such as low porosity,low permeability,and rich content of organic matter and clay ***,the osmotic pressure effects occurring between high-salinity formation water and low-salinity fracturing fluids are *** current understanding of the mobilization patterns of crude oil in micro-pores during the imbibition process remains nebulous,and the mechanisms underpinning osmotic pressure effects are not fully *** study introduces a theoretical approach,by which a salt ion migration control equation is derived and a mathematical model for spontaneous imbibition in shale is introduced,which is able to account for both capillary and osmotic *** indicate that during the spontaneous imbibition of low-salinity fluids,osmotic effects facilitate the migration of external fluids into shale pores,thereby complementing capillary forces in displacing shale *** considering both capillary and osmotic pressures,the calculated imbibition depth increases by 12%compared to the case where only capillary forces are *** salinity difference between the reservoir and the fracturing fluids significantly influences the imbibition *** for the shutin phase reveal that the pressure between the matrix and fractures reaches a dynamic equilibrium after 28 days of *** the production phase,the maximum seepage distance in the target block is approximately 6.02 m.

关键词： Shale oil osmotic pressure numerical simulation effective seepage distance

Numerical investigation of dual-porosity model with transient transfer function based on discrete-fracture model

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Applied Mathematics and Mechanics(English Edition) 2016年第5期37卷 611-626页

作者： Yizhao WAN Yuewu LIU Weiping OUYANG Guofeng HAN Wenchao LIU Institute of Mechanics Chinese Academy of SciencesBeijing 100190China Changqing Downhole Technology company Chuanqing Drilling Engineering Company LimitedChina National Petroleum CorporationXi'an 710018China

Based on the characteristics of fractures in naturally fractured reservoir and a discrete-fracture model, a fracture network numerical well test model is developed. Bottom hole pressure response curves and the pressure field are obtained by solving the model equations with the finite-element method. By analyzing bottom hole pressure curves and the fluid flow in the pressure field, seven flow stages can be recognized on the curves. An upscaling method is developed to compare with the dual-porosity model （DPM）. The comparisons results show that the DPM overestimates the inter-porosity coefficient ）, and the storage factor w. The analysis results show that fracture conductivity plays a leading role in the fluid flow. Matrix permeability influences the beginning time of flow from the matrix to fractures. Fractures density is another important parameter controlling the flow. The fracture linear flow is hidden under the large fracture density. The pressure propagation is slower in the direction of larger fracture density.

关键词： dual-porosity model (DPM) discrete-fracture model fracture network,finite-element method upscaling numerical well test

Non-Darcy flow in oil accumulation (oil displacing water) and relative permeability and oil saturation characteristics of low-permeability sandstones

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petroleum Science 2010年第1期7卷 20-30页

作者： Zeng Jianhui Cheng Shiwei Kong Xu Guo Kai Wang Hongyu State Key Laboratory of petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China School of Natural Resources and Information Technology China University of Petroleum Beijing 102249 China CNPC greatwall drilling company Beijing 100101 China

Hydrocarbon resources in low-permeability sandstones are very abundant and are extensively distributed. Low-permeability reservoirs show several unique characteristics, including lack of a definite trap boundary or caprock, limited buoyancy effect, complex oil-gas-water distribution, without obvious oil-gas-water interfaces, and relatively low oil （gas） saturation. Based on the simulation experiments of oil accumulation in low-permeability sandstone （oil displacing water）, we study the migration and accumulation characteristics of non-Darcy oil flow, and discuss the values and influencing factors of relative permeability which is a key parameter characterizing oil migration and accumulation in low-permeability sandstone. The results indicate that： 1） Oil migration （oil displacing water） in low- permeability sandstone shows non-Darcy percolation characteristics, and there is a threshold pressure gradient during oil migration and accumulation, which has a good negative correlation with permeability and apparent fluidity; 2） With decrease of permeability and apparent fluidity and increase of fluid viscosity, the percolation curve is closer to the pressure gradient axis and the threshold pressure gradient increases. When the apparent fluidity is more than 1.0, the percolation curve shows modified Darcy flow characteristics, while when the apparent fluidity up＂ non-Darcy percolation curve; 3） Oil-water is less than 1.0, the percolation curve is a ＂concave- two-phase relative permeability is affected by core permeability, fluid viscosity, apparent fluidity, and injection drive force; 4） The oil saturation of low- permeability sandstone reservoirs is mostly within 35%-60%, and the oil saturation also has a good positive correlation with the permeability and apparent fluidity.

关键词： Non-Darcy flow relative permeability oil saturation low-permeability sandstone

Anisotropy measurements and characterization of the Qingshankou shale

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Applied Geophysics 2024年第3期21卷 468-478,617页

作者： Li Qing-feng Yan Xue-hong Yan Wei-lin Ren Li Wang Peng Han Jian-qiang Xia Xue Chen Hao Daqing Oilfield Exploration Division Daqing163000HeilongjiangChina Daqing Branch company of CNPC Logging Daqing163000HeilongjiangChina Exploration and Development Research Institute of Daqing Oilfield Co. Ltd.Daqing163712China State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing100190China

Qingshankou shale(Gulong area,china)exhibits strong acoustic anisotropy characteristics,posing significant challenges to its exploration and *** this study,the five full elastic constants and multipole response law of the Qingshankou shale were studied using experimental *** show that the anisotropy parametersϵandγin the study region are greater than 0.4,whereas the anisotropy parameterδis smaller,generally *** simulations show that the longitudinal and transverse wave velocities of these strong anisotropic rocks vary significantly with inclination angle,and significant differences in group velocity and phase velocity are also *** logging measures the group velocity in dipped boreholes;this differs from the phase velocity to some *** the dip angle increases,the longitudinal and SH wave velocities increase accordingly,while the qSV-wave velocity initially increases and then decreases,reaching its maximum value at a dip of approximately 40°.These results provide an effective guide for the correction and modeling of acoustic logging time differences in the region.

关键词： Transverse isotropy anisotropy parameter sonic logging group velocity phase velocity

Rare earth elemental and Sr isotopic evidence for seawater intrusion event of the Songliao Basin 91 million years ago

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petroleum Science 2023年第3期20卷 1347-1362页

作者： Yu-Ke Liu Hua-jian Wang Jin-You Zhang Zhen-Wu Liu Fa-Zi Chen Xiao-Mei Wang Shui-Chang Zhang He Liu Research Institute of petroleum Exploration and Development Beijing100083China Key Laboratory of petroleum Geochemistry China National Petroleum CorporationBeijing100083China Daqing Oil Field company China National Petroleum CorporationDaqingHeilongjiang163000China School of Ocean Sciences China University of GeosciencesBejing100083China

Petrogenesis of lacustrine dolostone is closely related with paleo-lake water *** we report the high spatial-resolution petrographic and geochemical results of a lacustrine dolomite nodule from the Qingshankou Formation,the Songliao *** and elemental signatures confirm the protogenetic origin of this nodule and its effectiveness in recording geochemical characteristics of paleo-lake water during *** low Y/Ho ratios,middle rare earth element(MREE)enrichment and subtle positive Eu anomalies within the nodule indicate a fresh water ***,the Sr isotope values in the core of the nodule(0.7076-0.7080)are close to contemporaneous seawater(0.7074),yet different from the modern river(0.7120)and the host black shale(0.7100).On the premise of excluding the influence of hydrothermal fluids,the significantly low strontium isotope values of the lacustrine dolomite might be caused by seawater interference during *** findings demonstrate that lacustrine dolomite within black shales is not only a faithful tracer of diagenetic water environment,but also a novel and easily identified mineralogical evidence for episodic seawater intrusion event(91 Ma)in the Songliao Basin,which supplements other paleontological and geochemical evidence.

关键词： Songliao Basin Lacustrine dolostone Seawater intrusion Rare earth elements Strontium isotope

Activity criterion of pre-existing fabrics in non-homogeneous deformation domain

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Science china Earth Sciences 2010年第8期53卷 1115-1125页

作者： TONG HengMao CAI DongSheng WU YongPing LI XiaoGuang LI XuShen MENG LingJian State Key Laboratory of petroleum Resources and Prospecting China University of PetroleumBeijing 102249China Zhanjiang Branch of china national Offshore Oil corporation Zhanjiang 524057China Dagang Branch of china national petroleum corporation Tianjin 300280China Exploration and Development Institute Liaohe Oilfield Company of China National Petroleum CorporationPanjin 124010China

The Anderson's model can be applied only to elastic homogeneous deformation and cannot explain complicated phenomena of natural faults, which to a large degree limits the model to practical application. By combing the Coulomb-Mohr Criterion with the sandbox modeling and considering non-homogeneous deformation, mechanisms of how basement pre-existing fabrics control fault formation and evolution are analyzed and a mechanical factor, activation-coefficient (faS) of pre-existing fabrics, is proposed. It is determined by the attitude and mechanical properties of pre-existing fabric, and the stress state (the magnitudes and directions of the three principal stresses). The coefficient has taken the heterogeneity of rocks into account and may serve as a criterion for evaluating the activity of a pre-existing fabric. The Mohr-Coulomb Criterion is expanded to non-homogeneous deformation domain in terms of activation-coefficient (faS) of pre-existing fabrics, the general law of the activity of a pre-existing fabric is predicted, the fault complexity real of rift basin is revealed in theory, and the controlling law of basement pre-existing faults to fault formation and evolution is determined, and checked with sandbox modeling. A new way is provided for in-depth study of faulting.

关键词： Anderson’s model pre-existing fabric non-homogeneous deformation activation-coefficient sandbox modeling