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Occurrence state and oil content evaluation of Permian Fengcheng Formation in the Hashan area as constrained by NMR and multistage Rock-Eval

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Petroleum Science 2023年第3期20卷 1363-1378页

作者： Yue Wang Xiang-Chun Chang Zhong-Quan Liu Peng-Fei Zhang Wei-Zheng Gao Zhi-Ping Zeng Gui-Sheng Li College of Earth Science and Engineering Shandong University of Science and TechnologyQingdaoShandong266590China Laboratoryfor Marine Mineral Reources Pilot National Laboratory for Marine Science and Technology QingdaoShandong 266071China Research Institute of Petroleum Exploration and Development Shengli Oil CompanySinopecDongyingShandong257001China no.5 ooil production plant of dagang oilfield company CNPCTianjin300280China

The Hashan area,neighboring the Mahu Sag that is rich in the shale oil resources,showed commercial oil flow in the corresponding lacustrine shales of the Lower Permian Fengcheng Formation(P)with reserve scale approximately 789 million tons,presenting great potential for oil exploration.Despite their geographical proximity,the hydrocarbon occurrence and oil-bearing capacity of shale in the Hashan area and Mahu Sag greatly differ owing to the complex tectonic evolution.Therefore,understanding the occurrence state and oil content of the Pif in the Hashan area is crucial for ongoing shale oil exploration activities and the development of the northwestern margin of the Junggar Basin.In this study,an in-tegrated investigation,including petrological observations,scanning electron microscopy(SEM)obser-vation,analysis of nuclear magnetic resonance(NMR)Ti-T2 spectra,and conventional and multistage Rock-Eval pyrolysis methods were conducted to evaluate the occurrence state and oil content of the Pif shale in the Hashan area.The results indicate that plagioclase(average 30.7%)and quartz(24.1%)dominate the mineral compositions of the Pf shale samples.A method involving quartz-plagioclase-carbonate minerals is proposed to conduct lithofacies classification.In the Hashan area,the organic matter abundance in the Pf shale is scaled in fair to good range,the thermal maturity ranges from immature to early mature stage,and the primary organic matter types are Types I and Ilj.Intergranular and dissolution pores are the two most common pore types.The free oil is mostly found in the pores and microfractures of the mineral matrix,whereas the adsorbed oil is mostly adsorbed on the surfaces of kerogen and clay minerals.The high organic matter abundance,quartz content,and porosity account for substantial increase in the oil content,the area rich in shale oil resources coincides with that rich in free oil.The most favorable lithofacies in the Hashan area is the calcareous mudstone/shale,which hosts the highest free oil content(average 2.49

关键词： Hashan area Oil content Occurrence state Pore types Ti-T2 NMR Shale oil

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On the localised corrosion of carbon steel induced by the in-situ local damage of porous corrosion products

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Journal of Materials Science & Technology 2020年第19期54卷 95-104页

作者： Lin Pang Zhengbin Wang Yugui Zheng Xueming Lai Xu Han CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei230026China dagang oilfield Oil production Technology Research Institute of China National Petroleum Corporation Tianjin300280China Third Oil production plant of dagang oilfield company Cangzhou061723China

The effect of in-situ local damage of uniform porous corrosion products on the localised corrosion of carbon steel is investigated using the wire beam electrode technique(WBE)combined with morphology characterisation and electrochemical tests.The WBE measurements demonstrate that the localised corrosion is enhanced by the in-situ local removal of porous corrosion products,supported by the morphology characterisation and electrochemical tests.The enhanced localised corrosion does not originate from the damaged wire in WBE where the corrosion products are removed but from the other undamaged wires,which is reported for the first time.A mechanism is proposed that the intensive anodic polarisation effect of the damaged wire on the undamaged wires could account for the enhanced localised corrosion,which is due to the protective corrosion products newly formed on the damaged surface and the increase in the potential of damaged wire.

关键词： Carbon steel Localised corrosion Wire beam electrode Corrosion products

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Study on source rock potential and source rocks spatial distribution in the Manghan Faulted Sag, Kailu Basin

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第11期8卷 1872-1878页

作者： YIN Zhi-jun ZHANG Feng ZOU Hua-yao WANG Wei-xing ZHOU Lian-min CHEN Hua-lin Faculty of Resource and Information Technology China University of Petroleum Beijing 102249 China School of Energy Resources China University of Geosciences Beijing 100083 China Institute of Exploration and Exploitation Dagang Oilfield Tianjin 300280 China No.1 production plant Qinghai OilfieM Branch Company Dunhuang 736202 China Research Institute of Geological Exploration and Development Sichuan Petroleum Company CNPC Chengdu 610051 China

Manghan Faulted Sag is an exploratory target area in Kailu Basin. In order to determine its exploration prospect, the effectiveness of its source rocks is evaluated by organic geochemical behavior analysis of the samples, and their distributions are predicted using trace integration seismic inversion technology. Studies on their organic matter abundance, type and maturity indicate that the source rocks in the Sag have great generating potentials. Furthermore, it is found that, based on the spatial distribution predication, the source rocks in the Sag are well developed. Therefore, the Sag has a promising prospect for exploration.

关键词：矿源岩碳氢化合物有机物石油资源

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