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现代地质 ›› 2022, Vol. 36 ›› Issue (04): 1009-1021.DOI: 10.19657/j.geoscience.1000-8527.2022.204

• 油气勘探 • 上一篇    下一篇

火成岩风化壳储集层特征与油气产能关系研究:以准噶尔盆地红山嘴石炭系油藏为例

陈俊1,2(), 王剑1,2, 雷海艳1,2, 马聪1,2, 孟颖1,2, 齐婧1,2   

  1. 1.中国石油新疆油田分公司实验检测研究院,新疆 克拉玛依 834000
    2.新疆砾岩油藏实验室,新疆 克拉玛依 834000
  • 收稿日期:2021-12-20 修回日期:2022-01-15 出版日期:2022-08-10 发布日期:2022-09-09
  • 作者简介:陈 俊,女,工程师,1990年出生,矿物学、岩石学、矿床学专业,目前从事沉积储层研究。Email: 598820264@qq.com
  • 基金资助:
    国家重大科技专项“大型油气田及煤层气开发”(2011ZX05001-005-001)

Characteristics of Igneous Weathering Crust Reservoir and Its Relation With Oil and Gas Productivity: A Case Study of the Carboniferous Hongshanzui Reservoir, Junggar Basin

CHEN Jun1,2(), WANG Jian1,2, LEI Haiyan1,2, MA Cong1,2, MENG Ying1,2, QI Jing1,2   

  1. 1. Research Institute of Experiment and Testing, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
    2. Xinjiang Laboratory of Petroleum Reserve in Conglomerate, Karamay, Xinjiang 834000, China
  • Received:2021-12-20 Revised:2022-01-15 Online:2022-08-10 Published:2022-09-09

摘要:

红山嘴油田是准噶尔盆地典型的风化壳型油藏,具有广阔的勘探前景。利用宏微观岩矿分析、地球物理、地球化学等多种实验分析手段,对红山嘴地区火成岩岩石学特征、结构发育特征及控制因素开展综合研究,结果表明:(1)红山嘴地区发育侵入岩、次火山岩、火山熔岩、火山碎屑熔岩、火山碎屑岩和沉火山碎屑岩等6大类火成岩,其中安山岩和凝灰岩最为发育;(2)火成岩储集空间组合包括原生气孔—溶蚀孔—Ⅰ级裂缝型、溶蚀孔—Ⅰ/Ⅱ级裂缝型、Ⅲ级裂缝型和Ⅳ级裂缝型4类,Ⅰ—Ⅳ类储层物性依次变差;(3)风化壳自上而下发育水解带、淋蚀带、崩解Ⅰ带、崩解Ⅱ带、母岩带5个分带,顶部水解带风化强,多被分解成致密的泥土层,可作盖层,而淋蚀带和崩解Ⅰ带是风化淋蚀改造较好区,储层物性最好;(4)不同油气产能井与风化壳结构具有很好的对应关系,可为风化壳型火成岩油藏优势区带划分和产能预测提供指导。

关键词: 红山嘴油田, 石炭系, 火成岩, 风化壳储层, 油气产能

Abstract:

The Hongshanzui oilfield is a typical weathering crust reservoir in the Junggar Basin, and has substantial prospect for exploration. This study uses macro-/micro-lithological and mineral analyses, geophysics, geochemistry and other experimental techniques to comprehensively study the petrological and structural features and controlling factors of igneous rocks at Hongshanzui. The results show that:(1) There are six types of igneous rocks at Hongshanzui: intrusive rocks, subvolcanic rocks, volcanic lava, pyroclastic lava, pyroclastic rock and sed-volcanic pyroclastic rock, among which andesite and tuff are the most developed; (2) Reservoir space combination of igneous reservoir includes primary pore-dissolution pore-level I, dissolution pore-level I /Ⅱ, level Ⅲ and level IV fracture types, with the physical properties deteriorate from level I to IV reservoirs; (3) The weathering crust develops a five-layer structure from top to bottom: hydrolysis zone, leached zone, break-down zone I, break-down zone Ⅱ and the underlying bedrock. The hydrolysis zone on the top is commonly decomposed into a dense soil layer, which can serve as a cap. Besides, the leached zone and the break-down zone I show better weathering and leaching transformation, hence the reservoir has the best physical properties; (4) Different oil and gas productivity wells have a good corresponding relationship with the weathering crust structure, which can guide the division of the dominant zone for the weathering crust igneous rock reservoir and the related productivity prediction.

Key words: Hongshanzui oilfield, Carboniferous, volcanic, weathering crust reservoir, productivity

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