中国石油勘探 ›› 2007, Vol. 12 ›› Issue (2): 34-40,84.

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惠州26-2油田油藏地球化学特征及其地质意义

朱俊章,施和生,谢泰俊,舒誉,张晓宇   

  1. 中海石油(中国)有限公司深圳分公司技术部;中国海洋石油勘探开发研究中心;中海石油(中国)有限公司深圳分公司技术部 广东省广州市510240;广东省广州市510240;河北省高碑店市074010
  • 出版日期:2007-04-15 发布日期:2007-04-15
  • 基金资助:
    中国海洋石油总公司综合科研项目(海油科字(2004)37号)

Geochemical Features and Geological Significance of Oil Reservoir in Huizhou 26-2 Oilfield

Zhu Junzhang,Shi Hesheng,Xie Taijun,Shu Yu and and Zhang Xiaoyu   

  1. Zhu Junzhang1,Shi Hesheng1,Xie Taijun2,Shu Yu1 and Zhang Xiaoyu1//1 Technology Department of Shenzhen Company,CNOOC Ltd.,Guangzhou City,Guangdong Province 510240;2 CNOOC Research Center of Exploration and Development,Gaobeidian City,Hebei Province 074010
  • Online:2007-04-15 Published:2007-04-15

摘要: 采用油藏地球化学方法,初步建立了惠州26-2油田油水层的地球化学判识标准,分析了该油田油藏地球化学特征。惠州26-2油田珠江组和珠海组有来自文昌组和恩平组烃源岩生成的两期油气充注,先期充注的、来自文昌组烃源岩生成的原油在珠海组中下部遭受了中等强度的生物降解,后期又有来自恩平组烃源岩生成的油气充注。珠江组油藏中的烃类生物降解不明显。根据油藏烃类的组成差异和惠州26洼烃源岩热演化史,探讨了惠州26-2油田周边主断层的开启性及油气运移方向。

关键词: 珠江口盆地, 惠州凹陷, 油藏地球化学, 油气水层, 流体非均质性, 成因

Abstract: Based on geochemical method, this paper establishes a geochemical criterion preliminarily to identify the oil and water layers of Huizhou 26-2 Oilfield and analyze the geochemical features of oil reservoirs in the oilfield. The Zhujiang and Zhuhai Formations of Huizhou 26-2 Oilfield have two stages of oil and gas charge generated by the hydrocarbon source rocks ofWenchang and Enping Formations. The former stage of crude oil charge generated by the source rocks ofWenchang Formation is exposed to biodegradation in middle and lower parts of Zhuhai Formation, while the latter stage of oil and gas charge is generated by the source rocks of Enping Formation. The biodegradation of the hydrocarbons in the reservoirs of Zhujiang Formation is not obvious.On the basis of analyzing the composition differences of reservoir hydrocarbons and the thermal evolution history of the source rocks in Huizhou-26 sag, it discusses the unsealing property of the main faults and the oil and gas migration direction around Huizhou 26-2 Oilfield.

Key words: Pearl River Mouth Basin, Huizhou Sag, reservoir geochemistry, oil, gas and water layers, fluid heterogeneity, genesis

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