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Origin of condensate oil and natural gas in Bozhong 19-6 gas field,Bohai Bay Basin

Energy Geoscience 2024年第1期5卷 54-62页

作者： Jianyong Xu Wei Li CNOOC Research Institute Co.Ltd. Beijing100028China

The discovery of the Bozhong 19-6 gas field has opened a new frontier for deep gas exploration in the Bohai Bay Basin,with a great potential for further gas ***,poor understanding of oil and gas origin has been limiting the exploration progress in this *** clarify the origin of condensate oil and gas in Bozhong 19-6 gas field,this study adequately utilized the organic geochemical analysis data to investigate the composition and geochemical characteristics of condensate oil and natural gas,and analyzed the relationship between condensate oil and the three sets of source rocks in the nearby *** show that the lighter components dominate the condensate oil,with a forward type *** parent material of crude oil was primarily deposited in a shallow,clay-rich,low-salinity,weakly reducing aquatic *** condensate and natural gas have similar parent source characteristics and maturity,with Ro ranging from 1.4%to 1.6%.Both are products of high maturity stage,indicating that they are hydrocarbon compounds produced by the same group of source rocks in the same ***-sources correlation shows that condensate oil and gas mainly originate from the source rocks of the third member of Shahejie Formation in the nearby subsags of the Bozhong 19-6 structural belt.

关键词： Bozhong Sag Natural gas condensate oil Light hydrocarbon Gas-source correlation oil-source correlation

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Laboratory Investigation into the Evaporation of Natural-Gas condensate oils: Hints for the Sanchi oil Spill

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Journal of Ocean University of China 2020年第3期19卷 633-642页

作者： ZHANG Yong YANG Tao ZHANG Junbo LV Baoyi CHENG Xiangsheng FANG Yin East China Sea Environmental Monitoring Center State Oceanic AdministrationShanghai 201206China College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China College of Ocean Science and Engineering Shanghai Maritime UniversityShanghai 201306China

The Sanchi oil tanker collision in the East China Sea on January 6th, 2018 has caused worldwide attention due to its uniqueness. A considerable amount of highly volatile natural-gas condensate oil was spilled, burned and sank with the Sanchi tanker, this entirely new kind of maritime disaster has posed massive unknowns to the public. In this study, for better understanding of the evaporative behavior of condensate oils, two condensate oils were investigated under various laboratory conditions. The overall result demonstrates that the evaporation of condensate oils is highly dependent on the air-exposed time and the total loss of condensate oils could be more than 90% within a short time. However, a certain amount of the high-molecular weight and toxic oil contents such as phenanthrenes still highly remain in the aquatic system even after a long evaporation process, indicating their detrimental potentials to the aquatic organisms. Based on these data, for the Sanchi oil spill accident, it is assumed that although the evaporation weathering of the total condensate oil mass is probably tremendous, the long-term ecological risks of the remaining oil components in the marine environment are strongly recommended to be carefully evaluated.

关键词： condensate oil Sanchi oil spills oil evaporation n-alkanes polycyclic aromatic hydrocarbons

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Petroleum Characteristics and Controlling Factors in Lunnan Low Uplift,Tarim Basin

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Journal of Earth Science 2010年第2期21卷 236-246页

作者：王晓梅张水昌 State Key Laboratory of Enhanced oil Recovery PetroChina Research Institute of Petroleum Exploration and Development

The Lunnan （轮南） low uplift is a complex basin that is situated in northwestern China. This area had undergone a range of tectonic events, and there are multi-production zones and reservoir types. Also, heavy oil, common black oil, volatilization oil, condensate oil and natural gas are approximately under the same stratum pressure grads and geothermal grads. The east Lunnan low uplift is mainly composed of condensate oil and natural gas, the middle part has many types of petroleum and the west part mostly has heavy oil. The petroleum geochemistry may be the principal reason for the great difference of the oil and gas characteristics. The heavy oil in the west part is established by the biodegradation and mixing effect. The mixing effect in the middle part produced the complex petroleum distribution, and the oil cracking effect and mixing effect, or air cutting effect in the east part is proof of the existence of the industrial condensate gas reservoir and waxy oil. Understanding of the complex petroleum reservoir can further supervise the development of petroleum exploration in the Lunnan low uplift.

关键词： Lunnan low uplift condensate oil natural gas heavy oil mixing effect biodegradation.

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