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现代地质 ›› 2017, Vol. 31 ›› Issue (04): 802-813.

• 石油地质学 • 上一篇    下一篇

珠江口盆地珠一坳陷古隆起控藏特征及有利成藏区定量预测

李洪博1(), 庞雄奇2,3, 彭辉界1, 王卓超1, 王天宝1, 姜大朋1, 王文勇1   

  1. 1.中海石油(中国)有限公司 深圳分公司,广东 深圳 518054
    2.中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249
    3.中国石油大学(北京)盆地与油藏研究中心,北京 102249;
  • 收稿日期:2016-09-20 修回日期:2017-02-22 出版日期:2017-08-10 发布日期:2017-09-15
  • 作者简介:李洪博,男,工程师,硕士,1984年出生,能源地质工程专业,主要从事石油构造分析工作。Email:lihb8@cnooc.com.cn
  • 基金资助:
    国家“十二五”科技重大专项(2011ZX05023-006-003)

Characteristics of Controlling Hydrocarbon and Prediction of Favorable Exploration Zones of the Palaeouplift in ZhuⅠ Depression, Pearl River Mouth Basin

LI Hongbo1(), PANG Xiongqi2,3, PENG Huijie1, WANG Zhuochao1, WANG Tianbao1, JIANG Dapeng1, WANG Wenyong1   

  1. 1. Shenzhen Branch, CNOOC Ltd., Shenzhen,Guangdong 518054, China
    2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
    3. Basin and Reservoir Research Center, China University of Petroleum, Beijing 102249, China
  • Received:2016-09-20 Revised:2017-02-22 Online:2017-08-10 Published:2017-09-15

摘要:

古隆起是控制珠一坳陷油气成藏的重要因素,从定性和定量两个角度分析了古隆起控藏条件和控藏分布特征。通过对古隆起区域构造及形成演化分析,阐明了三级古隆起构造格局分布特征,明确了古隆起经历了始新世、早-中中新世及晚中新世三个构造演化阶段,总体具有长期继承性发育特点。总结了古隆起控藏的地质特征:古隆起范围控制了平面油气分布范围;古隆起构造演化控制了多种圈闭发育及油气藏类型;古隆起位置控制了油气优势运移方向。应用“多要素匹配成藏模式”原理和方法,建立了适合珠一坳陷的地质模型和数学模型,阐明了隆控临界成藏条件和控藏规律。研究发现,93.0%的油气藏储量分布在古隆起坡顶及坡上,油气田的储量及油田个数随着到古隆起顶部的距离增大而减小。基于古隆起控藏模式,预测了珠海组、珠江组上下段、韩江组上下段等5个目的层古隆起控藏高概率地区主要分布在东沙隆起、北部隆起带、惠西南条带、陆丰凹陷、PY4洼以及恩平凹陷周缘。

关键词: 珠一坳陷, 古隆起, 控藏特征, 定量表征, 有利区预测

Abstract:

The palaeouplift in Zhu Ⅰdepression is the most important factor for controlling hydrocarbon. This paper analyzes the conditions and distribution characteristics of palaeouplifts from the qualitative and quantitative views. According to the analysis of regional tectonic and formation evolution, the paper clarified regional distribution characteristics of three level paleouplift tectonics. A three-stages of tectonic evolution was identified for the palaeouplift, including Eocene, Early-Mid Miocene and the Late Miocene. In general, the evolution of palaeouplifts have characteristics of inherited long-term development. Moreover, the paper summarized the palaeo-uplifts geological characteristics of controlling hydrocarbon from three aspects. Firstly, the range of palaeouplifts controlled the distribution of oil and gas reservoirs. Secondly, the tectonic evolution of palaeouplift controlled the types of traps and oil gas reservoir. Thirdly, the position of palaeouplift controlled the direction of oil and gas migration. A geological model and a mathematical model for Zhu Ⅰdepression were established, which based on the application of Multi-factor Matching Model. From this research, the palaeouplifts which controlled the critical reservoiring condition and reservoir controlling rule were clear. Not only the top and upper of palaeo-uplifts controlled 93% of the reserves distribution, but also the oil fields’ number and reserves were decreases with the increase of distance to the top of palaeouplifts. Base on the pattern of palaeouplifts reservoir controlling, the research predicted favorable exploration zones of palaeouplifts in five target layers, which include Dongsha uplift, northern uplift zone, the southwest of Huizhou sag, and the periphery of Lufeng sag, PY4 sag and Enping sag.

Key words: Zhu Ⅰ depression, palaeouplift, characteristics of controlling hydrocarbon, quantitative analysis, prediction of favorable exploration zone

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