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Investigation of effects of clay content on F-Ф relationship by Lattice gas automation using digital rock model

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petroleum Science 2011年第2期8卷 170-176页

作者： yue wenzheng tao guo Chai Xiyuan Jiang Hongxiu Mu Hongwu state key laboratory of petroleum resource and prospecting China University of Petroleum Beijing 102249 China key laboratory of Earth prospecting and Information Technology China University of Petroleum Beijing 102249 China CNPC key laboratory of Well Logging China University of Petroleum B eijing 102249 China Bohai Drilling Engineering Company LTD Logging Company Tianjin 300280 China

The Lattice Gas Automation （LGA） method, which is improved by introducing a reflection coefficient for the border between phases to show its effect on current path, is used in this paper to simulate the current flow in digital rock for investigating the effects of clay content and clay distribution types on the relationship between formation factor（F） and rock porosity（φ）. The digital rock model is constructed by simulating a natural deposit of matrix particles with different shapes and radius. Based on the simulation results, it was found that both dispersed clay and laminated clay can lead to a non-Archie relationship of F-φ. The non-Archie effect of laminated clay on the F-φ relationship was more significant than that of dispersed clay. Moreover, a realistic model is developed in this work for quantitatively describing the effect of clay content （Denoted as Vsh） on parameters a and m. These study results have further demonstrated the validity of LGA in study of electrical transport properties at a pore scale.

关键词： Formation factor non-Archie Lattice gas automation porosity clay content claydistribution

Numerical simulation of non-Archie electrophysical property of saturated rock with lattice Boltzmann method

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petroleum Science 2009年第1期6卷 24-28页

作者： yue wenzheng tao guo Liu Dongming Yang Wendu state key laboratory of petroleum resource and prospecting China University of Petroleum Beijing 102249 China key laboratory of Earth prospecting and Information Technology China University of Petroleum Beijing 102249 China Research Centre of Well Logging CNPC Key Laboratory of Well Logging China University of Petroleum Beijing 102249 China CNPC Logging Changqing Business Division Xi＇an Shaanxi 710201 China Sichuan petroleum Administration Logging Company Ltd. CNPC Chongqing 401147 China

The electrophysical property of saturated rocks is very important for reservoir identification and evaluation. In this paper, the lattice Boltzmann method （LBM） was used to study the electrophysical property of rock saturated with fluid because of its advantages over conventional numerical approaches in handling complex pore geometry and boundary conditions. The digital core model was constructed through the accumulation of matrix grains based on their radius distribution obtained by the measurements of core samples. The flow of electrical current through the core model saturated with oil and water was simulated on the mesoscopic scale to reveal the non-Archie relationship between resistivity index and water saturation （I-Sw）. The results from LBM simulation and laboratory measurements demonstrated that the I-Sw relation in the range of low water saturation was generally not a straight line in the log-log coordinates as described by the Archie equation. We thus developed a new equation based on numerical simulation and physical experiments. This new equation was used to fit the data from laboratory core measurements and previously published data. Determination of fluid saturation and reservoir evaluation could be significantly improved by using the new equation.

关键词： Non-Archie relation digital core model lattice Boltzmann method numerical simulation rock physical experiment

Impacts of proppant distribution on development of tight oil reservoirs with threshold pressure gradient

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petroleum Science 2024年第1期21卷 445-457页

作者： Ming yue Wei-Yao Zhu Fei-Fei Gou Tian-Ru Song Yu-Chun You Qi-tao Zhang state key laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing102206China School of Civil and resource Engineering University of Science and Technology BeijingBeijing100083China

Field evidence indicates that proppant distribution and threshold pressure gradient have great impacts on well *** at the development of unconventional oil reservoirs in Triassic Chang-7 Unit,Ordos Basin of china,we presented an integrated workflow to investigate how(1)proppant placement in induced fracture and(2)non-linear flow in reservoir matrix would affect well productivity and fluid flow in the *** with our research before(yue et al.,2020),here we extended this study into the development of multi-stage fractured horizontal wells(MFHWs)with large-scale complicated fracture *** integrated workflow is based on the finite element method and consists of simulation models for proppant-laden fluid flow,fracture flow,and non-linear seepage flow,*** results indicate that the distribution of proppant inside the induced cracks significantly affects the productivity of the *** we assign an idealized proppant distribution instead of the real distribution,there will be an overestimation of 44.98%in daily oil rate and 30.63%in cumulative oil production after continuous development of 1000 ***,threshold pressure gradient(TPG)also significantly affects the well performance in tight oil *** we simply apply linear Darcy’s law to the reservoir matrix,the overall cumulative oil production can be overrated by 77%after 1000 days of *** general,this research provides new insights into the development of tight oil reservoirs with TPG and meanwhile reveals the significance of proppant distribution and non-linear fluid flow in the production scenario design.

关键词： Proppant distribution Tight oil reservoir Multi-stage fractured horizontal well Threshold pressure gradient Moving boundary

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碳酸盐岩储集层含H2S天然气成因研究

新疆石油地质 2008年第4期29卷 535-538页

作者：丁康乐李术元岳长涛钟宁宁中国石油大学重质油国家重点实验室北京102249 中国石油大学资源与信息学院北京102249

对天然气-固态硫酸钙体系进行了初步恒温热模拟实验研究,探讨了反应途径和热力学特征。结果表明,高温下天然气与固态硫酸钙可以发生明显的硫酸盐热化学还原反应(TSR),产物主要为硫化氢、二氧化碳、碳酸钙、水和焦炭。随TSR程度加深,天... 详细信息

对天然气-固态硫酸钙体系进行了初步恒温热模拟实验研究,探讨了反应途径和热力学特征。结果表明,高温下天然气与固态硫酸钙可以发生明显的硫酸盐热化学还原反应(TSR),产物主要为硫化氢、二氧化碳、碳酸钙、水和焦炭。随TSR程度加深,天然气中总烃所占比例呈递减趋势,天然气干燥程度与酸化程度均增大。给出了天然气参与TSR的反应途径通式并进行了热力学分析。热力学上长链烷烃比短链烷烃更容易与固态硫酸钙发生TSR.以川东北飞仙关组鲕滩高H2S天然气藏为例进行了TSR体系的地质实例研究,发现模拟实验结果与实际地质例证结论基本一致。

关键词：碳酸盐岩储集层天然气固态硫酸钙热模拟实验 TSR 硫化氢

Formation,evolution,reconstruction of black shales and their influence on shale oil and gas resource

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china Geology 2024年第3期7卷 551-585页

作者： Shi-zhen Li Qiu-chen Xu Mu Liu guo-heng Liu Yi-fan Li Wen-yang Wang Xiao-guang Yang Wei-bin Liu Yan-fei An Peng Sun tao Liu Jiang-hui Ding Qian-chao Li Chao-gang Fang state key laboratory of Continental Shale Oil Beijing 100083China The key laboratory of Unconventional Oil and Gas Geology China Geological SurveyBeijing 100083China Oil and Gas Survey China Geological SurveyMinistry of Natural ResourcesBeijing 100083China state key laboratory of Lithospheric and Environmental Coevolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Geosciences China University of Petroleum(East China)Qingdao 266580China School of Energy resources China University of Geosciences(Beijing)Beijing 100083China key laboratory of petroleum resources Research Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of resource and Environment Engineering Anhui UniversityHefei 230601China Yangtze university Wuhan 430100China Nanjing Center China Geological SurveyNanjing 210016China National Elite Institute of Engineering CNPCBeijing 100096China

Black shales are important products of material cycling and energy exchange among the lithosphere,atmosphere,hydrosphere,and *** are widely distributed throughout geological history and provide essential energy and mineral resources for the development of human *** also record the evolution process of the earth and improve the understanding of the *** review focuses on the diagenesis and formation mechanisms of black shales sedimentation,composition,evolution,and reconstruction,which have had a significant impact on the formation and enrichment of shale oil and *** terms of sedimentary environment,black shales can be classified into three types:Marine,terrestrial,and marine-terrestrial transitional *** formation processes include mechanisms such as eolian input,hypopycnal flow,gravity-driven and offshore bottom *** a geological perspective,the formation of black shales is often closely related to global or regional major geological *** enrichment of organic matter is generally the result of the interaction and coupling of several factors such as primary productivity,water redox condition,and sedimentation *** terms of evolution,black shales have undergone diagenetic evolution of inorganic minerals,thermal evolution of organic matter and hydrocarbon generation,interactions between organic matter and inorganic minerals,and pore *** terms of reconstruction,the effects of fold deformation,uplift and erosion,and fracturing have changed the stress state of black shale reservoirs,thereby having a significant impact on the pore *** activity promotes the formation of veins,and have changed the material composition,stress structure,and reservoir properties of black *** resource effects,the deposition of black shales is fundamental for shale oil and gas resources,the evolution of black shales promotes the shale oil and gas formation and storage,and the reconstruction of black shales wou

关键词： Black shales Shale oil and gas resource effects Sedimentary environment Sedimentary process Organic matter accumulation Diagenetic evolution Thermal evolution Organic matter and inorganic minerals Tectonic reconstruction Oil and gas exploration engineering Veins Fluid activity

Influencing mechanism of saline sediments on pore system formation and evolution in terrestrial shales

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petroleum Science 2023年第6期20卷 3280-3300页

作者： Yu-Qi Wu Fu-Jie Jiang Di Chen Jing guo Chen-Xi Zhu Zhao Zhao Zhuo-yue Yan tao Hu state key laboratory of petroleum resources and prospecting China University of PetroleumBeijing102249China College of Geosciences China University of PetroleumBeijing102249China Tianjin Branch of CNOOC china Ltd Tianjin300452China

The majority of oil and gas resources in the world are related to saline sediments, which mainly occur in sedimentary strata in the form of cap rocks or salt-associated shales. A large number of shale oil resources have been discovered in the saline shale sediments of the Cenozoic terrestrial lake basin in china. The hydrocarbon generation ability and the reservoir capacity of shale control the oil and gas generation. The reservoir capacity is mainly characterized by pore type, structure and porosity. Most of china’s shale oil and gas resources belong to salt-bearing formations. The role of gypsum-salt rocks in the formation and evolution of organic matter (OM) in such formations has received extensive attention. However, systematic understanding is lacking. Research on the pore formation and evolution in shale under the action of gypsum-salt rock sediments is especially weak. Taking the shales in the third member of the Shahejie Formation (Es_(3)) of the Bohai Bay Basin as an example, the influence of halite on the formation and evolution process of pores was studied in this paper. The results show that halite and gypsum minerals were associated with OM, which made them more likely to develop OM pores. The samples with a high halite mineral content (HC) are more developed regarding the pore volume and specific surface area than those with a low HC. The formation of thick salt rocks is influenced by factors of deep thermal brine upwelling, sea erosion and arid environments. The frequent alternation between humid and arid environments led to the outbreak and death of organisms and the precipitation of gypsum-salt rock, which formed the simultaneous deposition of OM and halite minerals. Finally, we have established a model of shale pore evolution under the participation of the gypsum-salt rock, and halite minerals contribute to pore development in both Stage II and Stage IV. This study provides strong microscopic evidence for the pore system formation and evolution in

关键词： Bohai bay basin Dongpu depression Pore evolution Salt-associated shale Halite mineral

Ambient volatile organic compounds at a receptor site in the Pearl River Delta region:Variations,source apportionment and effects on ozone formation

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Journal of Environmental Sciences 2022年第1期34卷 104-117页

作者： Yao Meng Junwei Song Lewei Zeng Yingyi Zhang Yan Zhao Xufei Liu Hai guo Liuju Zhong Yubo Ou Yan Zhou tao Zhang Dingli yue Senchao Lai The key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of Educationand Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution ControlSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China Institute of Meteorology and Climate Research Karlsruhe Institute of TechnologyHermann-von-Helmholtz-Platz 1Eggenstein-Leopoldshafen 76344Germany Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina Guangdong Environmental Monitoring Center State Environmental Protection Key Laboratory of Regional Air Quality MonitoringGuangzhou 510308China Guangdong Polytechnic of Environmental Protection Engineering Foshan 528216China

We present the continuously measurements of volatile organic compounds(VOCs)at a receptor site(Wan Qing Sha,WQS)in the Pearl River Delta(PRD)region from September to November of *** average mixing ratios of total VOCs(TVOCs)was 36.3±27.9 ppbv with the dominant contribution from alkanes(55.5%),followed by aromatics(33.3%).The diurnal variation of TVOCs showed a strong photochemical consumption during daytime,resulting in the formation of ozone(O_(3)).Five VOC sources were resolved by the positive matrix factorization(PMF)model,including solvent usage(28.6%),liquid petroleum gas(LPG)usage(24.4%),vehicle exhaust(21.0%),industrial emissions(13.2%)and gasoline evaporation(12.9%).The regional transport air masses from the upwind cities of south china can result in the elevated concentrations of *** ratios of TVOCs/NO_(x)(1.53±0.88)suggested that the O_(3) formation regime at WQS site was VOC-limited,which also confirmed by a photochemical box model with the master chemical mechanism(PBM-MCM).Furthermore,the observation on high-O_(3) episode days revealed that frequent O_(3) outbreaks at WQS were mainly caused by the regional transport of anthropogenic VOCs especially for aromatics and the subsequent photochemical *** study provides valuable information for policymakers to propose the effective control strategies on photochemical pollution in a regional perspective.

关键词： Volatile organic compounds(VOCs) Pearl River Delta(PRD)region Source apportionment Ozone(O_(3)) Regional transport

Digital core approach to the effects of clay on the electrical properties of saturated rocks using lattice gas automation

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Applied Geophysics 2011年第1期8卷 11-17,94页

作者： yue Wen-Zheng tao guo Chai Xi-Yuan Cui Dong-Zi state key laboratory of petroleum resource and prospecting Key Laboratory of Earth Prospecting and Information Technology CNPC Key Lab of Well Logging China University of Petroleum Beijing 102249 China Bohai Drilling Engineering Company LTD Logging Company Tianjin 300280 China Petrochina GWDC Drilling Technology Services Company Panjin 124010 China

Clay has a significant influence on the relationship between resistivity index I and water saturation Sw （i.e, I-Sw relationship） of reservoir rocks because it complicates the current paths of these rocks. It is difficult to reveal the physical mechanisms of these clay effects on the conductivities of various rocks by physical laboratory measurements because the pore structure, micro distribution and content of clay inside a rock can not be observed and controlled during the experiments. We present a digital rock approach to study these clay effects on the electrical transport properties of reservoir rocks at pore scale using lattice gas automation （LGA） method. The digital rock samples are constructed with the information of grain size distribution from SEM images of reservoir rocks. The LGA is then applied on these digital rocks fully saturated with fluids to simulate the electrical transport properties for revealing the effects of volume and distribution patterns of clay on the non-Archie behaviors of the I-Sw relationship. The very good agreement between the simulated results and the laboratory measurements clearly demonstrates the validity of the LGA in numerical research of rock physics. Based on these studies, a new model has been developed for quantitatively describing the relationship between the saturation exponent and the volume of clay （Vsh）. This development may improve the evaluation for the fluid saturations in reservoir rocks.

关键词： Lattice gas automation Digital rock non-Archie behavior of I-Sw relationship clay content

Biomarker evidence for biotic and environmental change across the Cambrian Series 2–Series 3 boundary at the Wuliu- Zengjiayan section, Guizhou, china

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Science china Earth Sciences 2014年第11期57卷 2781-2790页

作者： WANG ChunJiang ZHAO YuanLong PENG Jin YANG XinLian BAI Jie LIU yue CHEN tao state key laboratory of petroleum resources and prospecting China University of Petroleum College of resource and Environment Engineering Guizhou University

The Wuliu-Zengjiayan section in Jianhe County, Guizhou Province, china has been suggested as a potential Global Stratotype Section and Point(GSSP) for the defined base of Cambrian Series 3. A molecular organic geochemical study on the Cambrian Series 2Series 3 boundary interval was carried out to reveal the biotic and environmental change during this transition. The hydrocarbons extracted from the Kaili Formation were proved to be indigenous. The various geochemical proxies such as biomarker parameter, δ13Corg, atomic H/C value of kerogen, and TOC content, co-vary along with the sedimentary column, and show a quick and significant change just across the Cambrian Series 2Series 3 boundary. The less abundance of isoprenoid hydrocarbons, the relative enrichment of midchain monomethyl branched alkanes(mmb-alkanes), the relatively negative value of δ13Corg, and the higher TOC contents may suggest that the upper Cambrian Series 2 was deposited in a relatively reducing environment with a higher organic input from cyanobacteria-predominated benthic microbial mats. On the other hand, the relative enrichment of isoprenoid hydrocarbons, the less abundance of mmb-alkanes, the relatively positive value of δ13Corg, the lower TOC contents, and the lower atomic H/C values of kerogen are combined to indicate an enhanced phytoplankton production and an increased oxygen content and nutrients in the ocean during the early Cambrian Series 3, which could have benefited the explosion of the Kaili Biota. The Wuliu-Zengjiayan section may provide a typical case to understand the co-variation of marine microbe, animal, and environment.

关键词： Wuliu-Zengjiayan Cambrian Series 2-Series 3 boundary biomarker organic carbon isotope biotic and environmentalchange