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oil and gas source and accumulation of Zhongqiu 1 trap in Qiulitage structural belt, Tarim Basin, NW China

Petroleum Exploration and Development 2020年第3期47卷 548-559页

作者： LI Jian LI Jin XIE Zengye WANG Chao ZHANG Haizu LIU Mancang LI Dejiang MA Wei MAO Danfeng ZENG Xu Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China The Key Laboratory of gas Formation and Development PetroChinaLangfang 065007China Guangdong University of Petrochemical Technology Maoming 525000China Research Institute of Petroleum Exploration and Development PetroChinaTarim Oilfield CompanyKorla 841000China

Well Zhongqiu 1 obtained highly productive oil-gas stream in the footwall of Zhongqiu structure, marking the strategic breakthrough of Qiulitag structural belt in the Tarim Basin. However, the oil and gas sources in Zhongqiu structural belt and the reservoir formation process in Zhongqiu 1 trap remain unclear, so study on these issues may provide important basis for the next step of oil and gas exploration and deployment in Qiulitage structural belt. In this study, a systematic correlation of oil and gas source in Well Zhongqiu 1 has been carried out. The oil in Well Zhongqiu 1 is derived from Triassic lacustrine mudstone, while the gas is a typical coal-derived gas and mainly from Jurassic coal measures. The oil charging in Well Zhongqiu 1 mainly took place during the sedimentary period from Jidike Formation to Kangcun Formation in Neogene, and the oil was mainly contributed by Triassic source rock;large-scale natural gas charging occurred in the sedimentary period of Kuqa Formation in Neogene, and the coal-derived gas generated in the late Jurassic caused large-scale gas invasion to the early Triassic crude oil reservoirs. The Zhongqiu 1 trap was formed earlier than or at the same period as the hydrocarbon generation and expulsion period of Triassic-Jurassic source rocks. Active faults provided paths for hydrocarbon migration. The source rocks-faults-traps matched well in time and space. Traps in the footwall of the Zhongqiu structural fault have similar reservoir-forming conditions with the Zhongqiu 1 trap, so they are favorable targets in the next step of exploration.

关键词： Tarim Basin Kuqa foreland thrust belt Qiulitage structural belt oil and gas source oil and gas accumulation Zhongqiu1 trap

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Formation and accumulation of oil and gas in marine carbonate sequences in Chinese sedimentary basins

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Science China Earth Sciences 2012年第3期55卷 368-385页

作者： JIN ZhiJun Petroleum Exploration and Production Research Institute China Petroleum&Chemical Corporation(S1NOPEC)Beijing 100083China

Advances in studies of formation and accumulation mechanisms of oil and gas in marine carbonate sequences have led to continuing breakthroughs of petroleum exploration in marine carbonate sequences in Chinese sedimentary basins in recent years. The recently discovered giant Tahe oil Field and Puguang gas Field have provided geological entities for further studies of the formation and accumulation of oil and gas in marine carbonate sequences. Marine carbonate sequences in China are characterized by old age, multiple structural deformation, differential thermal evolution of source rocks, various reservoir types (i.e. reef-bank complex and paleo-weathered crust karst reservoir), uneven development of caprocks, especially gypsum seal, and multi-episodes of hydrocarbon accumulation and readjustment. As a result, the formation of hydrocarbon accumulations in the Chinese marine carbonate sequences has the following features: (i) the high-quality marine source rocks of shale and calcareous mudstone are often associated with siliceous rocks or calcareous rocks and were deposited in slope environments. They are rich in organic matter, have a higher hydrocarbon generation potential, but experienced variable thermal evolutions in different basins or different areas of the same basin. (ii) High quality reservoirs are controlled by both primary depositional environments and later modifications including diagenetic modifications, structural deformations, and fluid effects. (iii) Development of high-quality caprocks, especially gypsum seals, is the key to the formation of large-and medium-sized oil and gas fields in marine carbonate sequences. Gypsum often constitutes the caprock for most of large sized gas fields. Given that Chinese marine carbonate sequences are of old age and subject to multiple episodes of structural deformation and superposition, oil and gas tend to accumulate in the slopes and structural hinge zones, since the slopes favor the development of effective assembl

关键词： marine carbonate sequences oil and gas accumulation source rock high quality reservoir caprock depositional slope structural hinge zone

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Accelerating oil and gas Exploration in Western China by Studies of Formations of Hydrocarbon accumulations in Superimposed Basins—A Preface

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Acta Geologica Sinica(English Edition) 2010年第5期84卷 I0001-I0002页

作者： PANG Xiongqi State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 Basin and Reservoir Research Center China University of Petroleum Beijing 102249

The superimposed basins in the western region of China are a hot research topic for earth scientists home and abroad for their vast area and rich oil and gas resources. Their complex geological conditions and resultant great exploration difficulties have received much attention of the scientists. This issue presents the advances of several scholars in their long-term research on the mechanisms of oil and gas accumulation and the patterns of oil and gas distribution.

关键词： Studies Western China oil and gas accumulation oil and gas Distribution geological conditions research western region difficulties exploration attention presents Typical studies complex Chinese topic vast area

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Prediction of Apparent Equivalent Thickness Using the Spontaneous Potential Method and Its Application to oilfield Development

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Journal of China University of Geosciences 2007年第3期18卷 269-279页

作者：王君恒潘竹平孙树文郭雷 State Key Laboratory of Geological Processes and Mineral Resources Geo-detection Laboratory Ministry of Education School of Geophysics and Information Technology China University of GeosciencesBeijing 100083China The No.6 Institute of Shandong Geo-exploration Bureau Department of Earth Sciences Nanjing University

The upper spontaneous potential produced by oil and gas accumulation is of a stable potential field, and its intensity is directly proportional to the content of the source and inversely proportional to the radius apart from the source. Theoretical research and practical results show that anomalies of spontaneous potential can indicate oil-bearing sandstone bodies and locate the areas of oil and gas accumulation. In oil areas which have fewer reservoir beds, the petroleum reservoir thickness can be predicted by determining the linear relationship between potential intensity and apparent equivalent thickness. In the Weixing （卫星） oilfield, which is devoid of sufficient reservoir beds, its apparent equivalent thickness can be predicted by the linear equation h= -0.19x＋0.74. On the basis of geological research, we use the spontaneous potential method to predict the equivalent thickness, helping in the selection of the most appropriate drill sites to enhance the probability of successful well boring so as to serve the next round development of the oilfield.

关键词： oil and gas accumulation equivalent thickness prediction.

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A Study on the Ore-forming Effect of Mantle-derived Fluid

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Petroleum Science 2007年第4期4卷 44-49页

作者： Meng Qingqiang Wu Jianfeng Zhang Liuping Basin and Reservoir Research Center China University of Petroleum Beijing 102249 China） Key Laboratory of Hydrocarbon Migration and accumulation Ministry of Education China University of Petroleum Beijing 102249 China Beijing Tianyi United Investment and Management Co. Ltd. Beijing 100013 China Institute of Geology and Geophysics China Academy of Science Beijing 100029 China

Based on summarizing of the effect of mantle-derived fluid on the formation of ores, especially on gold ore, and with the latest investigations, such as the formation of ore from the action of shallow-deep fluid, the transportation effect of the thermal energy by mantle-derived fluid, this paper mainly aims at the effect of mantle-derived fluid on the generation of hydrocarbons. With the proof from geochemistry and fluid inclusion, it was suggested that the mantle-derived fluid not only supplied source materials for hydrocarbons, but also supplied essential energy and matter necessary for the generation of hydrocarbons. The mantle-derived fluid had a good effect, but at the same time it had an adverse effect under specific conditions, on the formation of reservoirs. This paper also discusses the future direction and significance of studying mantle-derived fluid.

关键词： Mantle-derived fluid ore-forming effect mantle ore oil and gas accumulation

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Hydrocarbon migration in fracture-cave systems of carbonate reservoirs under tectonic stresses:A modeling study

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Petroleum Research 2019年第4期4卷 354-364页

作者： Chenjun Huang Geyun Liu Yongsheng Ma Xingui Zhou Linyan Zhang Jinyin Yin Jinrui Guo Petroleum Exploration and Production Research Institute SINOPECBeijing100083China Center of Journals&Annals Hebei GEO UniversityShijiazhuang050031China China Petroleum&Chemical Corporation Beijing100728China oil&gas Survey China Geological SurveyBeijing100083China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing100081China

The Tahe oilfield,located in the southwest of the Akekule nosing structure,northern Tarim basin,was the most prolific oilfield targeting at the Ordovician carbonate reservoirs in *** reservoir space was dominant with fracture-cave systems commonly induced by tectonics and *** hydrocarbon production had proceeded for two decades in the Tahe oilfiled,the control of oil and gas accumulations was still *** this work,the periodic fluid flow induced by cyclic tectonic stresses was proposed as the mechanism of hydrocarbon migration in the fracture-cave systems of carbonate *** fracture networks formed conduits for fluid flow,and the fluid pressure in caves transmitted from stress field provided the driving *** constitutive equations were established among stresses,fracture densities and flow *** quasi-3D geological models were constructed to simulate the flow velocities on the Ordovician surface of Akekule nosing structure in the critical tectonic *** simulated results supplied indicative information on oil and gas migration and accumulation in the tectonic *** with the oil and gas charge history,a conceptual model was built to reveal the multi-stage oil and gas charge and accumulation in the Ordovician of Akekule nosing structure.

关键词： Fracture-cave system Periodic fluid flow Numerical modeling oil and gas accumulation Akekule nosing structure Tarim Basin

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Reservoir accumulation conditions and key exploration&development technologies for Keshen gas field in Tarim Basin

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Petroleum Research 2019年第4期4卷 295-313页

作者： Haijun Yang Yong Li Yangang Tang Ganglin Lei Xiongwei Sun Peng Zhou Lu Zhou Anming Xu Jingjie Tang Wenhui Zhu Jiangwei Shang Weili Chen Mei Li Exploration and Development Research Institute PetroChina Tarim Oilfield CompanyXinjiang841000China College of Petroleum and Natural gas Engineering Southwest Petroleum UniversityChengdu610000China

The Keshen gas field is located in the central part of Kuqa foreland thrust belt in Tarim Basin,and is another large gas field discovered in Kuqa depression after Kela 2 gas *** the breakthrough in 2008,a number of large and medium scale gas reservoirs including Keshen 2,Keshen 5 and Keshen 8 have been discovered,that are characterized by ultra depth,ultra-high pressure,ultra-low porosity,ultra-low permeability,high temperature and high *** natural gas geological reserves of nearly trillion cubic meters and production capacity of nearly 5.5 billion cubic meters,the Keshen gas field is the main natural gas producing area in Tarim *** Keshen gas field is located in a series of thrusting imbrication structures in the Kelasu structural belt of Kuqa foreland thrust *** salt roof structure,plastic rheology of salt beds and pre-salt faulted anticlinal structure constitute the large wedge-shaped thrust *** thick delta sandstone of the Cretaceous Bashijike Formation is widely distributed,and it forms the superior reservoir-caprock combination with overlying Paleogene thick gypsum-salt *** deep Jurassic-Triassic oil and gas migrate vertically along fault system formed in Late Himalaya,break through the thick Cretaceous mudstone and move laterally along the fracture system of the pre-salt reservoirs,to form anticline and fault anticline high pressure reservoir *** near ten years of studies,the three-dimensional seismic acquisition and processing technology for complex mountainous areas,extrusion salt-related structural modeling technology and fractured low-porosity sandstone reservoir evaluation technology have been established,which lay a foundation for realization of oil and gas exploration *** acquisition and evaluation technology for high temperature,high pressure,ultra-deep and low-porosity sandstone gas reservoirs,and efficient development technology for fractured tight sandstone gas reservoirs have been

关键词： oil and gas accumulation Three-dimensional mountainous seismic exploration Ultra-deep high temperature and high pressure gas reservoirs High efficiency exploration and development Keshen gas field Tarim Basin

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