地学前缘 ›› 2011, Vol. 18 ›› Issue (2): 268-276.

• 论文 • 上一篇    下一篇

东营凹陷民丰地区深部储层成岩环境变化研究

周瑶琪，周振柱，陈勇，路言秋，周红建，明玉广   

  1. 1. 中国石油大学（华东）地球资源与信息学院， 山东 青岛 266555
    2. 中国石油化工股份有限公司 胜利油田分公司， 山东 东营 257000
  • 收稿日期:2010-12-20 修回日期:2011-01-20 出版日期:2011-03-15 发布日期:2011-04-15
  • 作者简介:周瑶琪（1963—），男，教授，博士生导师，主要从事地球化学研究。E-mail：zhouyq@upc.edu.cn
  • 基金资助:

    国家自然科学基金项目（40772082，40902040）

 Research on diagenetic environmental changes of deep reservoir in Minfeng Area, Dongying Sag.

  1. 1. College of GeoResource and Information， University of Petroleum China， Qingdao 266555， China
    2. Shengli Oilfield Branch Company， SINOPEC， Dongying 257000， China
  • Received:2010-12-20 Revised:2011-01-20 Online:2011-03-15 Published:2011-04-15

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摘要：

通过薄片鉴定、激光拉曼光谱分析、全岩和粘土矿物分析以及流体包裹体测试等手段，结合埋藏史分析，研究了东营凹陷民丰地区深部储层成岩环境的特点。分析认为，东营凹陷民丰地区深部储层成岩现象丰富，表现出不同成岩环境相叠合的特征，存在酸性、碱性和酸性碱性交替等多重成岩环境。着重利用不同成岩环境代表矿物中的流体包裹体分析成岩环境的变化，结果显示，3 000~3 200 m是碱性流体活动的重要深度。东营凹陷民丰地区深部储层在埋深过程中由浅到深大致经历了（弱）碱性（小于1 750 m）→酸性（1 750~3 200 m）→酸碱交替（3 200~4 000 m）→碱性（4 000~5 000 m）→弱碱性到弱酸性（大于5 000 m）多重成岩环境的变化，从而形成了现今复杂的成岩现象。埋深和温度是成岩环境变化的宏观主导因素，但并非绝对控制因素，局部流体性质的变化更能直接导致成岩环境的变化。

关键词: 深部储层, 酸性成岩环境, 碱性成岩环境, 流体包裹体

Abstract:

Based on thinsection observation, Raman analysis of minerals, rock and clay minerals analysis, and fluid inclusion analysis, and combined with burial history analysis, this paper discusses the diagenetic characteristics of deep reservoir in Minfeng Area, Dongying Sag. It was recognized that the deep reservoir had abundant diagenetic appearances and the characteristics of superimposed multiple diagenetic environments, such as acidic environment, alkaline environment, and alternating acidic and alkaline environments. The fluid inclusions represented different diagenetic environments were used to analyze the changes of diagenetic environments. The results showed that the depth ranging from 3000 m to 3200 m was a very important interval of alkaline fluid action. From shallow to deep, the diagenetic environments of deep reservoir in Mingfeng Area underwent a process from alkaline or alkalescent (shallower than 1750 m) to acidic (1750-3200 m), to alternating of acidic and alkaline (3200-4000 m), to alkaline (4000-5000m), and to alkalescent or weak acidic (deeper than 5000 m). The process of diagenetic environmental changes resulted in current complex diagenetic appearances. Depth and temperature were the macro dominant factors for the diagenetic environmental changes, but not the absolute control factors. The alternation of fluid property in local area might have caused the changes of diagenetic environments more directly.

Key words: deep reservoir, acidic diagenetic environment, alkaline diagenetic environment, fluid inclusions

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