新疆石油地质

新疆石油地质 ›› 2006, Vol. 27 ›› Issue (6): 704-707.

• 油气勘探 • 上一篇    下一篇

东营凹陷王家岗地区原油地球化学特征及成因类型

王圣柱1,2, 金强2, 钱克兵1,2, 王文彬1   

  1. 1.中国石化胜利油田有限责任公司地质科学研究院, 山东东营 257015;
    2.中国石油大学地球资源与信息学院, 山东东营257061
  • 收稿日期:2006-02-20 修回日期:2006-05-13 出版日期:2006-12-01 发布日期:2020-10-21
  • 作者简介:王圣柱(1979-), 男, 山东济宁人, 在读硕士研究生, 有机地球化学,(Tel) 15954633536(M)(E-mail) pillar1979@163.com.

Geochemical Characteristics and Origin Classification of Crude Oil in Wangjiagang Area in Dongying Sag

WANG Sheng-zhu1,2, JIN Qiang2, QIAN Ke-bing1,2, WANG Wen-bin1   

  1. 1. Research Institute of Geosciences, Shengli Oilfield Company Ltd., Sinopec, Dongying, Shandong 257015, China;
    2. Faculty of Geo-Resources and Information, China University of Petroleum, Dongying, Shandong 257061, China
  • Received:2006-02-20 Revised:2006-05-13 Online:2006-12-01 Published:2020-10-21

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摘要： 通过对研究区原油、含油砂岩和烃源岩样品抽提物中饱和烃和芳香烃化合物的地球化学特征对比分析, 将该区原油划分为4 种成因类型。第1类原油低密度、低含硫量、高含蜡量、饱和烃碳数分布呈“单峰型”、植烷优势[m(Pr)/m(Ph) 为0.51~0.72) ] 、规则甾烷相对含量C29>C27>C28呈反“L”型, 反映了以高等植物生源为主的特征, 成熟度高, 来源于孔二段烃源岩; 第2类原油高密度、高含硫量、低含蜡量、“单峰型”、异常高植烷含量[m(Pr) /m(Ph) <1.0]、规则甾烷C29>C27>C28呈不对称“V”型、高伽马蜡烷含量, 反映了咸水低等水生生物来源, 成熟度较低, 为沙四段烃源岩生成原油; 第3 类原油饱和烃呈“双峰型”, 规则甾烷C29>C27>C28也呈反“L”型, 反映了低等水生生物与高等陆源植物混合来源的特征, 来源于孔二段和沙四段烃源岩; 第4类原油遭受生物降解, 正构烷烃缺失, 为孔店组和沙四段形成的混源油或沙四段原油。该区4类原油在空间上呈规律性分布。

关键词: 东营凹陷, 原油分析, 生物标志物, 成因, 类型

Abstract: The correlation of geochemical characteristics of saturated hydrocarbon and aromatic hydrocarbon compounds among crude oil, oil-bearing sandstone and source rock extractive matters in the studied area is conducted. The result shows that the crude oil can be divided into four types of origins. The first type of crude oil is characterized by low density, low sulfur, high wax content, gas chromatography of saturated hydrocarbon showing single peak, m(Pr) /m(Ph) ratio ranging from 0.51 to 0.72, relative content of sterane of C29>C27>C28 showing reverse "L" shape and high maturity, reflecting the origin of higher plants, which originates from Ek2 source rock; the second type by high density, high sulfur, low wax content, single peak shape, m(Pr) /m(Ph) ratio less than 1.0, sterane content of C29>C27>C28 showing asymmetrical "V" shape, high gammacerane content and high maturity, reflecting the origin of lower aquatic organism, which originates from Es4 source rock; the third type shows dual-peak shape, sterane content of C29>C27>C28 also showing reverse "L" shape, reflecting the mixed origin of lower aquatic organism and higher terrigenous plants, which originates from Ek2 and Es4; the fourth type by biodegradation and lack of n-alkane, being an origin-mixed crude oil of Es4. The fourth types of crude oils in this area assume regular distribution spatially.

Key words: Dongying sag, crude analysis, biomarker, origin, type

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