| 柴达木盆地英雄岭构造带油气藏地质特征 |
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| 引用本文： | 伍坤宇,廖春,李翔,张成娟,张强,李贵梅,张静,谭秀成.柴达木盆地英雄岭构造带油气藏地质特征[J].现代地质,2020,34(2):378-389. |
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| 作者姓名： | 伍坤宇 廖春 李翔 张成娟 张强 李贵梅 张静 谭秀成 |
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| 作者单位： | 1.中国石油天然气集团公司 青海油田分公司,甘肃 敦煌 7362022.西南石油大学 油气藏地质及开发工程国家重点实验室,四川 成都 6105003.中国石油勘探开发研究院 西北分院,甘肃 兰州 730020 |
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| 基金项目： | 中国石油天然气股份有限公司重大科技专项(2016E-0102);中国石油天然气股份有限公司重大科技专项(2016E-0105);国家科技重大专项(2016ZX05046);国家科技重大专项(0201001009269);青海油田科技项目(研2017-内部-勘探-07) |
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| 摘 要： | 为总结柴英雄岭构造带油气藏地质特征和主控因素,以该区深层和浅层油气藏为研究对象,对油气藏的构造、储层、油气源和成藏演化模式等方面进行了对比研究。结果表明:(1)英雄岭构造带构造样式自西向东变化显著,英西—英中纵向上表现为“双层结构”,而英东构造样式相对简单;(2)英西—英中碳酸盐岩储层主要储集空间为白云岩晶间孔,局部发育溶蚀孔和裂缝集中区,英东碎屑岩储层,主要发育粒间孔、少量粒间溶孔和裂缝;(3)油源对比表明,下干柴沟组上段为区内主力烃源岩;(4)天然气组分及同位素指标表明英西和英中的CH4主要来源于原油伴生气,而英东为凝析油伴生气;(5)由于岩盐层封盖作用,英西—英中深层形成自生自储的异常高压油气藏,而英东虽缺乏盐岩盖层,由深至浅地表现为幕式充注成藏。
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| 关 键 词： | 构造样式 储层 油气源 油气藏地质特征 英雄岭构造带 |
| 收稿时间： | 2018-12-10 |
| 修稿时间： | 2019-06-20 |
Geological Characteristics of Hydrocarbon Pool in Yingxiongling Structural Zone,Qaidam Basin |
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| WU Kunyu,LIAO Chun,LI Xiang,ZHANG Chengjuan,ZHANG Qiang,LI Guimei,ZHANG Jing,TAN Xiucheng.Geological Characteristics of Hydrocarbon Pool in Yingxiongling Structural Zone,Qaidam Basin[J].Geoscience——Journal of Graduate School,China University of Geosciences,2020,34(2):378-389. |
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| Authors: | WU Kunyu LIAO Chun LI Xiang ZHANG Chengjuan ZHANG Qiang LI Guimei ZHANG Jing TAN Xiucheng |
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| Institution: | 1. Qinghai Oil Field Company, CNPC, Dunhuang,Gansu 736202, China2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu,Sichuan 610500, China3. Northwest Branch of Research Institute of Petroleum Exploration and Development, PetroChina, Lanzhou,Gansu 730020, China |
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| Abstract: | To understand the geological features and controlling factors on hydrocarbon accumulation in the Yingxiongling area, we systemically studied the structures, reservoir, and the oil & gas origin and accumulation evolution model. Our results showed that the structural styles of the Yingxiongling structural zone change significantly from west to east. The middle-western Yingxiongling area has a vertical ‘double-layer’ structure. The structural style in eastern Yingxiongling was simpler than that in middle-western Yingxiongling. The main pore type of carbonate reservoirs in middle-western Yingxiongling is inter-crystal pore, together with local development of dissolution pores and fracture aggregates. Pore space developed in clastic reservoirs in eastern Yingxiongling is mainly interparticle pore, with some interparticle dissolution pores and fractures. The upper member of the Xiaganchaigou Formation is the main source rock. The composition and isotopic factors of the natural gas indicated that the CH4 in middle-western Yingxiongling was originated as crude oil associated gas, and the CH4 in eastern Yingxiongling was associated gas of condensate oil. Due to the existence of halite seal layers, abnormally high-pressure hydrocarbon pools were formed in the deeper parts of middle-western Yingxiongling. In contrast, halite seal layers are absent in eastern Yingxiongling, and the hydrocarbon pool there is characterized by episodic accumulation from the deeper to the shallower parts. |
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| Keywords: | structural style reservoir hydrocarbon source geology of hydrocarbon pool Yingxiongling structural zone |
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