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Petroleum Science 2022年第2期19卷 472-485页

作者： Mei-Hua Yang Yin-Hui Zuo Kang-Nan Yan Yong-Shui Zhou Yun-Xian Zhang Cheng-Fu Zhang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengduSichuan 610059China Energy&Geoscience Institute University of UtahSalt Lake CityUT84108USA Research Institute of Exploration and Development Zhongyuan OilfieldSINOPECPuyangHenan 457001China

With the increasing exploration and development of typical hydrocarbon-rich depressions,such as the dongpu depression,the exploitation difficulty of shallow formations is *** is an urgent need to clarify the hydrocarbon generation mode and hydrocarbon generation histories in deep *** this study,a gold tube-autoclave closed system was used to simulate the hydrocarbon generation processes and establish the hydrocarbon generation mode of different types of ***,constrained by the thermal history and hydrocarbon generation kinetics,hydrocarbon generation histories were *** results show that hydrocarbon generation evolution can be divided into five stages,and the maturity of each stage is *** hydrocarbon generation history of the source rocks of the Shahejie 3 Formation mainly dates from the early depositional period of the Shahejie 1 Formation to the middle depositional period of the Dongying *** generation history constrained by thermal history and hydrocarbon generation kinetics is more in line with actual geological ***,this research can provide important hydrocarbon generation parameters for deep oil and gas exploration and exploitation of the Shahejie 3 Formation in the dongpu depression.

关键词： dongpu depression Thermal history Hydrocarbon generation kinetics Hydrocarbon generation mode Hydrocarbon generation history

Key factors controlling shale oil enrichment in saline lacustrine rift basin:implications from two shale oil wells in dongpu depression,Bohai Bay Basin

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Petroleum Science 2021年第3期18卷 687-711页

作者： Tao Hu Xiong-Qi Pang Fu-Jie Jiang Qi-Feng Wang Guan-Yun Wu Xiao-Han Liu Shu Jiang Chang-Rong Li Tian-Wu Xu Yuan-Yuan Chen State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China College of Geosciences China University of PetroleumBeijing 102249China Energy&Geoscience Institute University of UtahSalt Lake CityUT 84108USA Research Institute of Exploration and Development Zhongyuan Oilfeld CompanySINOPECPuyangHenan 457001China

Comparative analyses of petroleum generation potential,reservoir volume,frackability,and oil mobility were conducted on 102 shale cores from the dongpu *** show the shale has high organic matter contents composed of oil-prone type I and type II kerogens within the oil *** types of pores and fractures exist in the shale,with a porosity of up to 14.9%.The shale has high brittle mineral contents,extensive fractures,and high potential for oil mobility due to high seepage capacity and *** the petroleum generation potential of the shale at Well PS18-8 is relatively greater than that at Well PS18-1,oil content of the latter is greater due to the greater *** porosity and fracture density observed in Well PS18-1 are greater and more conducive to shale oil *** the shales in Wells PS18-1 and PS18-8 have similar brittle mineral contents,the former is more favorable for anthropogenic fracturing due to a higher preexisting fracture ***,the shale at Well PS18-1 has a higher seepage capacity and overpressure and therefore a higher oil *** fracture density and overpressure play key roles in shale oil enrichment.

关键词： Petroleum generation potential Reservoir volume Frackability Oil mobility Shale oil enrichment dongpu depression Saline lacustrine rift basin

Hydrocarbon Generation Characteristics of Source Rocks from Different Saline Environments in the dongpu depression,Bohai Bay Basin,China

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Acta Geologica Sinica(English Edition) 2021年第4期95卷 1260-1278页

作者： LI Wendu ZHANG Pengyuan JIANG Fujie ZHANG Yunxian HUANG Renda XU Tianwu ZHOU Yongshui LI Longlong JIANG Wenli State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083China State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China Basin and Reservoir Research Center China University of Petroleum(Beijing)Beijing 102249China Zhongyuan Oilfield Branch SINOPECPuyangHenan 457001China Wuxi Research Institute of Petroleum Geology Sinopec Petroleum Exploration&Production Research InstituteWuxiJiangsu 214000China Strategy Research Center of Oil and Gas Resources Ministry of Land and ResourcesBeijing 100034China

The dongpu depression is a secondary salt-bearing tectonic unit in the Bohai Bay Basin,eastern *** depositional environment of this depression regarding its Paleogene strata is clearly different in plane,including the saltwater environment(SE)in the north,the freshwater environment(FE)in the south and the brackish water environment(BE)in the *** result of oil and gas exploration in the dongpu depression shows that more than 90%of the proven oil reserves are distributed in the northern saltwater *** studies indicate that the organic geochemistry characteristics and the hydrocarbon generation capacity of the source rocks are very clearly diverse under different environments,which results in the significant differences in the proved reserves between the north and the *** order to further explore the differences in the hydrocarbon generation capacity of the source rocks under distinct depositional environments and the mechanism of their occurrence,three samples from different depositional environments(W18-5 for SE,H7-18 for BE,CH9 for FE)were used for confined gold tube pyrolysis *** results show that the CH4 yields of W18-5,H7-18 and CH9 increase with increasing temperature,the maximum yields being 405.62 mg/g TOC,388.56 mg/g TOC and 367.89 mg/g TOC,*** liquid hydrocarbon yields of W18-5,H7-18 and CH9 firstly increase with increasing temperature and then decrease after the critical *** maximum yields of C6-14 are 149.54 mg/g TOC,140.18 mg/g TOC and 116.94 mg/g TOC,the maximum yields of C14+being 852.4 mg/g TOC,652.6 mg/g TOC and 596.41 mg/g TOC,respectively for W18-5,H7-18 and *** summarize,the order of hydrocarbon potential from high to low is W18-5,H7-18 and *** this basis,through analyzing the influencing factors of hydrocarbon differences,this paper reveals that the saltwater environment is characterized by 4 factors:higher salinity,halophilic algae,high paleo-productivity and a strongly

关键词： sapropelite exinite gold-tube pyrolysis experiment hydrocarbon generation evolutionary model dongpu depression Bohai Bay Basin

Hydrocarbon charge history of the Paleogene reservoir in the northern dongpu depression,Bohai Bay Basin,China

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Petroleum Science 2016年第4期13卷 625-641页

作者： You-Lu Jiang Lei Fang Jing-Dong Liu Hong-Jin Hu Tian-Wu Xu School of Geosciences China University of PetroleumQingdao 266580ShandongChina CNOOC Research Institute Beijing 100028China SINOPEC Zhongyuan Oil Company Puyang 457001HenanChina

The hydrocarbon charge history of the Paleogene in the northern dongpu depression was analyzed in detail based on a comprehensive analysis of the generation and expulsion history of the major hydrocarbon source rocks, fluorescence microscopic features and fluid inclusion petrography. There were two main stages of hydrocarbon generation and expulsion of oil from the major hydrocarbon source rocks. The first stage was the main hydrocarbon expulsion stage. The fluorescence microscopic features also indicated two stages of hydrocarbon accumulation. Carbonaceous bitumen, asphaltene bitumen and colloidal bitumen reflected an early hydrocarbon charge, whereas the oil bitumen reflected a second hydrocarbon charge. Hydrocarbon inclusions also indicate two distinct charges according to the diagenetic evolution sequence, inclusion petrography features combined with the homogenization temperature and reservoir burial history analysis. According to these comprehensive analysis results, the hydrocarbon charge history of the Paleogene reservoir in the northern dongpu depression was divided into two phases. The first phase was from the late Dongying depositional period of the Oligocene to the early uplift stages of the late Paleogene. The second phase was from the late Minghuazhen period of the Pliocene to the Quaternary. Reservoirs formed during the first period were widely distributed covering the entire area. In contrast,reservoirs formed during the second period were mainly distributed near the hydrocarbon generation sags. Vertically, it was characterized by a single phase in the upper layers and two phases in the lower layers of the Paleogene.

关键词： dongpu depression Hydrocarbon charge history Hydrocarbon generation and expulsion history Fluid inclusion Petrography Fluorescence microscopy

Structural Characteristics of Paleozoic and Geological Significance of Oil and Gas of dongpu depression

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Journal of China University of Mining and Technology 2003年第1期13卷 97-102页

作者：杨世刚 China University of Geosciences

The dongpu depression has experienced a complicated evolution of structure since Mesozoic. The Paleozoic carbonate rock has been strongly reformed and the buried hills with different characteristics of structure are developed in the depression. There exist lots of groups of fault structures with strikes of NNE(or NE),NW, near NS and EW etc., of which the faults with strikes of NNE and NW play an important controlling role on present-day structural framework of the depression. The faults with near NS-striking and EW-striking deeply affect the establishment of structural framework of basement of the depression. Although most of the fractures are filled by calcite and other minerals, under the action of later structural stress, the earlier fractures could change their features into tensional ones. Therefore, much attention should be paid to the exploration and exploitation of Paleozoic oil and gas in dongpu depression.

关键词： dongpu depression Paleozoic structure oil-gas geology

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

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东濮凹陷文138断块沙二下亚段层序地层

东濮凹陷文138断块沙二下亚段层序地层