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Characteristics and origin of low-organicmatter carbonate source rocks in the Middle-Upper Ordovician, Tarim Basin, northwestern China

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Journal of Palaeogeography 2024年第3期13卷 594-619页

作者： Jun-Qing Chen Fu-Jie Jiang Xiong-Qi Pang Hai-Jun Yang Kan-Yuan Shi Bo Pang Hong Pang Jian-Fa Chen Zhuo-Heng Chen Xin-Gang Zhang Song Wu State Key Laboratory of petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing 102249China Basic Research Center for Energy Interdisciplinary College of ScienceChina University of Petroleum(Beijing)Beijing 102249China Beijing Key Laboratory of Optical Detection Technology for Oil and Gas China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China Research institute of petroleum Exploration and Development PetroChina Tarim Oilfield CompanyKorla 841000Xinjiang Uygur Autonomous RegionChina Geological survey of Canada Natural Resources CanadaCalgary T2L 2A7Canada

The continually-discovered large volumes of marine hydrocarbons indicate a huge exploration potential within the carbonate rocks of Ordovician in the Tarim Basin,northwestern *** Middle-Upper Ordovician(O2+3)carbonate source rocks are at a highly mature *** rocks presently contain a low amount of total organic carbon(TOC_(pd)≤0.5%)(TOC_(pd) means the present-day TOC).A mass balance approach is used to identify the source rocks that have expelled *** characteristics and origin of hydrocarbon expulsion from low-TOC_(pd) source rocks are studied,which are significant for oil exploration in the *** results showed that a low-TOC_(pd) O2+3 source rock having expelled hydrocarbons was type I and had a very narrow oil *** a high rock maturity and a high original TOC(TOCo)value exceeding 1%,nearly 80%of the generated hydrocarbons were *** content of gammacerane and C28 steranes in the oil and source rock extracts were relatively lean,with a V-shaped distribution of regular steranes,suggesting a possible genetic relation between the low-TOC_(pd) source rocks and the marine oil in the Tabei *** planktonic algae or acritarchs were the main hydrocarbon parent materials,distributed in the subsiding platform-slope *** matter was preserved under reducing conditions,and source rocks were formed with a favorable kerogen type and a moderate hydrocarbon generation *** study illustrates the hydrocarbon expulsion of low TOC_(pd) source rocks in northern Tarim Basin,which is greatly significant for analyzing the genesis of marine crude oil in Tarim Basin,and evaluating the distribution of marine source *** research method is theoretically significant for oil and gas exploration in the same type of highlymature carbonate paleobasins.

关键词： Carbonate source rock Mass balance approach Present-day TOC Genesis mechanism Tarim Basin

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Dynamic response and failure process of horizontal-layered fractured structure rock slope under strong earthquake

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Journal of Mountain Science 2024年第3期21卷 882-900页

作者： WANG Tong LIU Xianfeng HOU Zhaoxu XU Jiahang ZHANG Jun YUAN Shengyang JIANG Guanlu HU Jinshan School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of High-Speed Railway Engineering of Ministry of Education Southwest Jiaotong UniversityChengdu 610031China School of Civil Engineering Xinjiang Institute of EngineeringUrumqi 830023China China Railway First survey and design institute Group Co.LTD Xi'an 710043China

Rock slope with horizontal-layered fractured structure(HLFS)has high stability in its natural ***,a strong earthquake can induce rock fissure expansion,ultimately leading to slope *** this study,the dynamic response,failure mode,and spectral characteristics of rock slope with HLFS under strong earthquake conditions were investigated based on the large-scale shaking table model *** this basis,multiple sets of numerical calculation models were further established by UDEC discrete element *** influencing factors were considered in the parametric study of numerical simulations,including slope height,slope angle,bedding-plane spacing and secondary joint spacing as well as bedrock dip *** results showed that the failure process of rock slope with HLFS under earthquake action is mainly divided into four phases,i.e.,the tensile crack of the slope shoulder joints and shear dislocation at the top bedding plane,the extension of vertical joint cracks and increase of shear displacement,the formation of step-through sliding surfaces and the instability,and finally collapse of fractured rock *** acceleration response of slopes exhibits elevation amplification effect and surface *** simulations indicate that the seismic stability of slopes with HLFS exhibits a negative correlation with slope height and angle,but a positive correlation with bedding-plane spacing,joint spacing,and bedrock dip *** results of this study can provide a reference for seismic stability evaluation of weathered rock slopes.

关键词： Seismic behavior Horizontal layered Weathered rock slope Shaking table test Failure mode

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Dynamic thermo-mechanical responses of road-soft ground system under vehicle load and daily temperature variation

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1722-1731页

作者： Chuxuan Tang Jie Liu Zheng Lu Yang Zhao Jing Zhang Yinuo Feng State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China xinjiang Transportation Planning survey and design institute Co. Ltd.Urumqi830006China Hubei Key Laboratory of Geo-Environmental Engineering Wuhan430071China

A complete road-soft ground model is established in this paper to study the dynamic responses caused by vehicle loads and/or daily temperature variation.A dynamic thermo-elastic model is applied to capturing the behavior of the rigid pavement,the base course,and the subgrade,while the soft ground is characterized using a dynamic thermo-poroelastic *** to the road-soft ground system are derived in the Laplace-Hankel transform *** time domain solutions are obtained using an integration *** temperature,thermal stress,pore water pressure,and displacement responses caused by the vehicle load and the daily temperature variation are *** show that obvious temperature change mainly exists within 0.3 m of the road when subjected to the daily temperature variation,whereas the stress responses can still be found in deeper places because of the thermal swelling/shrinkage deformation within the upper road ***,it is important to consider the coupling effects of the vehicle load and the daily temperature variation when calculating the dynamic responses inside the road-soft ground system.

关键词： Dynamic response Vehicle load Daily temperature variation Thermo-poroelastic medium Coupling effects

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Muscovite^(40)Ar/^(39)Ar isotopic dating of pegmatite veins in the Bieyesamas rare metal deposit in the Altay Mountain,xinjiang,northwestern China

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China Geology 2024年第3期7卷 589-591页

作者： Geng-biao Qiao Ping Wang Xiao-hong Wang Jun-lu Chen Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits Ministry of Natural ResourcesXi’an 710119China Northwest China Center for Geoscience Innovation Xi’an Center of China Geological SurveyXi’an 710119China petroleum Exploration and Development Research institute of PetroChina Changqing Oilfield Company Xi’an 710086China

*** The Altay Orogenic Belt in xinjiang,China is located in the west of the Central Asian Orogenic Belt and in the transition zone between the Siberian Plate and the Kazakhstan-Junggar Plate,extending approximately 500 km in northern xinjiang,China(Fig.1a).The Altay Orogenic Belt has undergone two-way accretion of the Paleozoic crust and the Meso-Cenozoic intracontinental orogeny,leading to the formation of large numbers of intermediate-acid *** than 100000 pegmatite veins have been discovered in the intermediate-acid intrusions,and they constitute an important rare metal metallogenic belt of China(Fig.1b).

关键词： xinjiang dating isotopic

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Highly efficient removal of Cr(Ⅵ)from wastewater via adsorption with novel magnetic Fe_3O_4@C@MgAl-layered double-hydroxide

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Chinese Chemical Letters 2015年第9期26卷 1137-1143页

作者： Hui Zhang Fei Huang De-Lei Liu Peng Shi College of Chemistry and Chemical Engineering Southwest Petroleum University OilεGas Field Applied Chemistry Key Laboratory of Sichuan Province Southwest Petroleum University xinjiang petroleum survey and design institute

Novel magnetic Fe3O4@C@MgAl-layerecl double-hydroxide（LDH） nanoparticles have been successfully prepared by the chemical self-assembly *** properties of surface functional groups,crystal structure,magnetism and surface morphology of magnetic nanoparticles were characterized by Fourier transform infrared spectroscopy（FT-IR）,X-ray diffraction（XRD）,thermal gravity-differential thermal gravity（TG-DTG）,scanning electron microscopy（SEM）,and transmission electron microscopy（TEM）.The adsorption studies of the novel adsorbent in removing heavy metals Cr（Ⅵ） from waste water showed that the maximum absorption amount of Cr（Ⅵ） was 152.0 mg/g at 40℃ and pH *** excellent adsorption capacity of the Fe3O4@C@MgAl-LDH nano-absorbents plus their easy separation,environmentally friendly composition and reusability makes them more suitable adsorbents for the removal of metal ions from waste water.

关键词： Magnetic nanoparticles MgAl-layered double-hydroxide Adsorption Chromium(VI)

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Influence of gravel content and cement on conglomerate fracture

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petroleum Science 2023年第3期20卷 1724-1741页

作者： Zhen-Xin Zhang Hong-Kui Ge Jjian-Bo Wang Jian-Tong Liu Dun-Qing Liu Wei-Wei Teng Ying-Hao Shen Unconventional Oil and Gas Technology Research institute China University of Petroleum(Beijing)Beijing102249China Department of petroleum Engineering China University of Petroleum(Bejing)at KaramayKaramay83400oXinjiangChina CNPC xinjiang Oilfield Company Karamay834000XinjiangChina

Tight reservoirs are typically developed by horizontal wells and multi-stage hydraulic *** conglomerate reservoir is one type of tight reservoirs,which is different from homogeneous rock,such as tight *** is because that the existence of gravels makes conglomerate have strong ***,it is difficult to grasp the fracture mechanism and the law of fracture propagation of conglomerate,which limits the efficient development of the conglomerate *** this paper,the fracture characteristics and factors influencing the fracturing of Mahu conglomerate were studied by uniaxial compression,acoustic emission monitoring and X-ray computed tomography(CT)scanning *** results show that the fracture characteristics of conglomerates are influenced by the gravel content and *** conglomerate in the study area is mainly divided into carbonate cemented conglomerate and clay cemented *** fracture complexity of carbonate cemented conglomerate first increases and then decreases with increasing gravel ***,for clay cemented conglomerates,the fracture complexity increases over the gravel *** crack development stress is a significant parameter in the crack assessment of *** study is useful to understand the influence of meso-fabric characteristics of conglomerates on their fracturing and crack evolution and guides the design of hydraulic fracturing.

关键词： Conglomerate Mechanical property Fracture characteristics Crack evolution

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Structural Characteristics and Formation Dynamics: A Review of the Main Sedimentary Basins in the Continent of China

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Acta Geologica Sinica(English Edition) 2016年第4期90卷 1156-1194页

作者： HE Bizhu ZHENG Menglin institute of Geology Chinese Academy of Geological Sciences petroleum Exploration and Development institute Xinjiang Oilfield Company

The formation and evolution of basins in the China continent are closely related to the collages of many blocks and orogenic belts. Based on a large amount of the geological, geophysical, petroleum exploration data and a large number of published research results, the basement constitutions and evolutions of tectonic-sedimentary of sedimentary basins, the main border fault belts and the orogenesis of their peripheries of the basins are analyzed. Especially, the main typical basins in the eight divisions in the continent of China are analyzed in detail, including the Tarim, Ordos, Sichuan, Songliao, Bohai Bay, Junggar, Qiadam and Qiangtang basins. The main five stages of superimposed evolutions processes of basins revealed, which accompanied with the tectonic processes of the Paleo-Asian Ocean, Tethyan and Western Pacific domains. They contained the formations of main Cratons （1850-800 Ma）, developments of marine basins （800-386 Ma）, developments of Marine- continental transition basins and super mantle plumes （386-252 Ma）, amalgamation of China Continent and developments of continental basins （252-205 Ma） and development of the foreland basins in the western and extensional faulted basin in the eastern of China （205~0 Ma）. Therefore, large scale marine sedimentary basins existed in the relatively stable continental blocks of the Proterozoic, developed during the Neoproterozoic to Paleozoic, with the property of the intracontinental cratons and peripheral foreland basins, the multistage superimposing and late reformations of basins. The continental basins developed on the weak or preexisting divisional basements, or the remnant and reformed marine basins in the Meso-Cenozoic, are mainly the continental margins, back-arc basins, retroarc foreland basins, intracontinental rifts and pull-apart basins. The styles and intensity deformation containing the faults, folds and the structural architecture of regional unconformities of the basins, responded to the openings, subd

关键词： sedimentary basin structural architecture superimposed evolution interaction dynamics of basin and orogeny continent of China

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Differences in CO_(2)-Water-Rock Chemical Reactions among ’Sweet Spot’ Reservoirs:Implications for Carbon Sequestration

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地质学报:英文版 2023年第3期97卷 972-985页

作者： YANG Leilei SONG Ziyang LIU Yi WEI Guo ZHANG Xing MO Chenchen FENG Bo LI Yaohua College of Carbon-Neutral Energy China University of Petroleum(Beijing)Beijing 102249China National Key Laboratory of petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing 102249China Unconventional petroleum Research institute China University of Petroleum(Beijing)Beijing 102249China petroleum institute China University of Petroleum-Beijing at KaramayKaramayXinjiang 834000China College of Artificial Intelligence China University of Petroleum(Beijing)Beijing 102249China Key Laboratory of Groundwater Resources and Environment Ministry of EducationJilin UniversityChangchun 130021China Oil and Gas survey China Geological SurveyBeijing 100083China

The Lucaogou Formation,located in the Jimsar Sag,Junggar Basin,NW China,has great potential for shale oil *** the process of CO_(2)-EOR(CO_(2) enhance oil recovery),mineral dissolution,precipitation and transformation,leading to the local corrosion or blockage of reservoirs,have a significant influence on *** this study,a combination of high-temperature and high-pressure laboratory experiments and coupled temperature/fluid-chemistry multifield numerical simulations are used to investigate CO_(2)-water-rock reactions under various reservoir conditions in the upper and lower ’sweet spots’,to reveal the mechanisms underlying CO_(2)-induced mineral dissolution,precipitation and *** addition,we quantitatively calculated the evolution of porosity over geological timescales;compared and analyzed the variability of CO_(2) transformation in the reservoir under a variety of temperature,lithology and solution conditions;and identified the main factors controlling CO_(2)-water-rock reactions,the types of mineral transformation occurring during long-term CO_(2) sequestration and effective carbon sequestration *** results demonstrate that the main minerals undergoing dissolution under the influence of supercritical CO_(2) are feldspars,while the main minerals undergoing precipitation include carbonate rock minerals,clay minerals and *** minerals,especially the initially abundant plagioclase in the formation,directly affects total carbon sequestration,feldspar-rich clastic rocks therefore having considerable sequestration potential.

关键词： CO_(2) water-rock reactions mineral transformation carbon sequestration

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petroleum Science 2023年第1期20卷 362-369页

作者： Yu-Long Yang Yu Hu Ya-Ting Zhu Ji-Gang Zhang Ping Song Ming Qin Hai-Rong Wu Zhao-Jie Song Ji-Rui Hou State Key Laboratory of petroleum Resources and Prospecting China University of Petroleum-BeijingBeijing 102249China College of Carbon Neutral Energy China University of Petroleum-BeijingBeijing 102249China Unconventional petroleum Research institute China University of Petroleum-BeijingBeijing 102249China Research institute of petroleum Exploration and Development Xinjiang OilfieldKaramay 834000China

Tight conglomerate reservoirs are featured with extremely low permeability,strong heterogeneity and poor water ***_(2) huff-n-puff has been considered a promising candidate to enhance oil recovery in tight reservoirs,owing to its advantages in reducing oil viscosity,improving mobility ratio,quickly replenishing formation pressure,and potentially achieving a miscible ***,reliable inhouse laboratory evaluation of CO_(2) huff-n-puff in natural conglomerate cores is challenging due to the inherent high formation *** this study,we put forward an equivalent method based on the similarity of the miscibility index and Grashof number to acquire a lab-controllable pressure that features the flow characteristics of CO_(2) injection in a tight conglomerate *** impacts of depletion degree,pore volume injection of CO_(2) and soaking time on ultimate oil recovery in tight cores from the Mahu conglomerate reservoir were successfully tested at an equivalent *** results showed that oil recovery decreased with increased depletion degree while exhibiting a non-monotonic tendency(first increased and then decreased)with increased CO_(2) injection volume and soaking *** lower oil recoveries under excess CO_(2) injection and soaking time were attributed to limited CO_(2) dissolution and asphaltene *** work guides secure and reliable laboratory design of CO_(2) huff-n-puff in tight reservoirs with high formation pressure.

关键词： Tight conglomerate reservoir CO_(2)huff-n-puff Similarity-based equivalent pressure Enhanced oil recovery

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Characteristics of flow and liquid distribution in a gas-liquid vortex separator with multi spiral arms

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Particuology 2022年第9期20卷 101-113页

作者： Xiuying Yao Peng Zuo Chunxi Lu Chenglin E Mengxi Liu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Research institute of Experimental and Detection Xinjiang Oilfield CompanyPetroChinaKaramayXinjiang 834000China

Fischer-Tropsch(F-T)synthesis is an important route to achieve the clean fuel *** perfor-mance of gas-liquid separation equipment involving in the progressive condensation and separation of light and heavy hydrocarbons in the oil-gas products has become a bottleneck restricting the smooth operation of the F-T *** order to remove the bottleneck,a gas-liquid vortex separator with simple structure,low pressure drop and big separation capacity was designed to achieve the efficient separation between gas and droplets for a long *** RSM(Reynolds Stress Model)and DPM(Discrete Phase Method)are employed to simulate the flow characteristics and liquid distribution in the *** results show that the separation efficiency is influenced by the flow field and liquid phase concentration in the annular *** transverse vortex at the top of spiral arm entrains the droplets with small diam-eter into the upper annular *** entrained droplets rotate upward at an angle of about 37.4°.The screw pitch between neighbor liquid threads is about 0.3 *** is a top liquid ring in the top of annular zone,where the higher is the liquid phase concentration,the lower is the separation *** is found that by changing the operating condition and the annular zone height the vortex can be strengthened but not enlarged by the inlet *** screw pitch is not affected by both inlet velocity and annular zone *** liquid phase concentration in the top liquid ring decreases with both the increases of inlet velocity and annular zone *** total pressure drop is almost not affected by the annular zone height but is obviously affected by the inlet *** the height of annular zone is more than 940 mm,the separation efficiency is not ***,the annular zone height of 940 mm is thought to be the most economical design.

关键词： Gas-liquid separator Vortex separation Structural optimization Separation performance Computational fluid dynamics

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