吉林大学学报(地球科学版) ›› 2020, Vol. 50 ›› Issue (2): 644-652.doi: 10.13278/j.cnki.jjuese.20190267

• 油气勘探开发 • 上一篇    下一篇

黄骅坳陷石炭-二叠系凝析油气地球化学特征及来源分析

徐进军1, 李宁2, 金强1, 刘吉华1, 楼达3, 滕建成3   

  1. 1. 中国石油大学(华东)地球科学与技术学院, 山东 青岛 266580;
    2. 延长油田股份有限公司勘探开发技术研究中心, 陕西 延安 716001;
    3. 中国石油大港油田勘探开发研究院, 天津 300280
  • 收稿日期:2019-12-10 出版日期:2020-03-26 发布日期:2020-03-31
  • 通讯作者: 李宁(1994-),女,助理工程师,硕士,主要从事油气勘探工作,E-mail:1050122711@qq.com E-mail:1050122711@qq.com
  • 作者简介:徐进军(1987-),男,讲师,博士,主要从事油气地球化学研究,E-mail:xujj2015@upc.edu.cn
  • 基金资助:
    国家科技重大专项（2016ZX05006-007-004）；国家自然科学基金项目（41702139）；山东省自然科学基金项目（ZR2017BD036）；中央高校基本科研业务费专项（18CX02008A）

Geochemical Characteristics and Source Analysis of Carboniferous-Permian Condensate Oil and Gas in Huanghua Depression

Xu Jinjun1, Li Ning2, Jin Qiang1, Liu Jihua1, Lou Da3, Teng Jiancheng3   

  1. 1. School of Geosciences and Technology, China University of Petroleum(Huadong), Qingdao 266580, Shandong, China;
    2. Exploration and Development Research Center, Yanchang Oil Field Co., Ltd., Yan'an 716001, Shaanxi, China;
    3. Research Institute of Petroleum Exploration and Production, CNPC, Tianjin 300280, China
  • Received:2019-12-10 Online:2020-03-26 Published:2020-03-31
  • Supported by:
    Supported by National Science and Technology Major Project of the Ministry of Science and Technology of China (2016ZX05006-007-004), National Natural Science Foundation of China (41702139), Natural Science Foundation of Shandong Province (ZR2017BD036) and Fundamental Research Funds for the Central Universities (18CX02008A)

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摘要： 深层油气勘探是未来油气资源的重要接替领域。渤海湾盆地下伏石炭-二叠系煤系烃源岩自油气勘探取得新突破以来，一直是深层油气领域研究的热点。黄骅坳陷新部署的QG8井奥陶系碳酸盐岩储层和YG1井二叠系砂岩储层获高产凝析油气流，其来源判别问题是深层油气勘探的关键。针对QG8、YG1井凝析油气开展的生物标志化合物、有机碳稳定同位素和原油物性研究表明：两口井的凝析油均为低黏度、低密度的典型轻质原油，具有姥鲛烷优势（Pr/Ph>2.8），QG8井凝析油饱和烃δ13C为-29.1‰、芳烃δ13C为-26.8‰；天然气δ13C1偏重，介于-39.7‰~-36.4‰之间，干燥系数大于0.8，重烃可达16.2%，为偏干湿气。QG8与YG1井凝析油特征与黄骅坳陷石炭-二叠系煤系烃源岩（饱和烃δ13C为-29.26‰~-26.87‰，芳烃δ13C为-26.62‰~-24.15‰）及KG4井原油物性（0.757 1~0.840 2 g/cm3）相近，天然气特征则相似于济阳坳陷GBG1井的煤成气（δ13C1为-43‰~-35‰），表明高产的凝析油气来自石炭-二叠系煤系烃源岩。证实渤海湾盆地深层石炭-二叠系煤系具有生烃潜力和油气勘探前景。

关键词: 凝析油气, 油气地球化学, 油气源对比, 石炭-二叠系, 黄骅坳陷

Abstract: Deep oil and gas exploration is an important replacement area for oil and gas resources in the future. Since the oil and gas exploration of the Lower Carboniferous-Permian coal-series source rocks in Bohai Bay basin has made new breakthroughs, it has become a research hotspot in the deep oil and gas field. The high-yield condensate gas flow has been obtained in the newly deployed Well QG8 and Well YG1 in the Dagang exploration area, and the source identification is the key to deep oil and gas exploration. The analysis result indicates that the condensate from well QG8 and Well YG1 is light oil with low viscosity and density. The condensate has high pristane (Pr/Ph>2.8),and the stable carbon isotope (δ13C) of n-alkanes and aromatic hydrocarbons of Well QG8 condensate is -29.1‰ and -26.8‰ respectively. The δ13C1 of natural gas is heavier, ranging from -39.7‰ to -36.4‰ with drying coefficient more than 0.8,and the heavy hydrocarbon content is higher, up to 16.2%,belonging to wet gas prone to dry. It is found that the characteristics of condensate oil and gas of Well QG8 and Well YG1 are similar in stable carbon isotopes in extracts (saturated hydrocarbons δ13C=-29.26‰—-26.87‰, aromatic hydrocarbons δ13C=-26.62‰—-24.15‰, natural gas δ13C1=-43‰—-35‰,and crude oil physical properties of density is 0.757 1-0.840 2 g/cm3), indicating that the condensate oil and gas come from the Carboniferous-Permian coaly source rocks. It is confirmed that the Carboniferous-Permian coaly source rocks in Bohai Bay basin have hydrocarbon generation potential and oil-gas exploration prospect.

Key words: condensate oil and gas, organic geochemistry, oil and gas source comparison, Carboniferous-Permian, Huanghua depression

中图分类号: 

  • P618.13
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