西南石油大学学报(自然科学版) ›› 2020, Vol. 42 ›› Issue (2): 1-14.DOI: 10.11885/j.issn.1674-5086.2019.04.08.01

• 地质勘探 •    下一篇

混积岩复杂岩性识别方法

陈恭洋1, 王鹏宇2, 高阳3, 张方3, 印森林1   

  1. 1. 长江大学录井技术与工程研究院, 湖北 荆州 434023;
    2. 长江大学地球科学学院, 湖北 武汉 430100;
    3. 中国石油新疆油田公司勘探开发研究院, 新疆 克拉玛依 834000
  • 收稿日期:2019-04-08 出版日期:2020-04-10 发布日期:2020-04-10
  • 通讯作者: 王鹏宇,E-mail:470344144@qq.com
  • 作者简介:陈恭洋,1963年生,男,汉族,湖北潜江人,教授,博士,主要从事石油地质与录井地质方面的研究和教学工作。E-mail:gychen8888@126.com;王鹏宇,1995年生,男,汉族,河北石家庄人,硕士研究生,主要从事油气田开发、录井地质等方面的研究。E-mail:470344144@qq.com;高阳,1981年生,男,满族,辽宁丹东人,高级工程师,主要从事油田开发研究与方案编制方面的工作。E-mail:gaoyang@petrochina.com.cn;张方,1988年生,女,汉族,新疆克拉玛依人,硕士,主要从事沉积学与储层地质学研究。E-mail:1048221544@qq.com;印森林,1983年生,男,汉族,湖北仙桃人,副教授,博士,主要从事油气田开发地质、录井地质方面的研究和教学工作。E-mail:yinxiang_love@qq.com
  • 基金资助:
    国家自然科学青年基金(41502126,41802123);国家科技重大专项(2017ZX05008-006-004-002)

Identification of the Complex Lithology of Mixed Rock

CHEN Gongyang1, WANG Pengyu2, GAO Yang3, ZHANG Fang3, YIN Senlin1   

  1. 1. Institute of Mud Logging Technology and Engineering, Yangtze University, Jingzhou, Hubei 434023, China;
    2. College of Geoscience, Yangtze University, Wuhan, Hubei 430100, China;
    3. Research Institute for Exploration and Development, Xinjiang Oilfield Company, CNPC, Karamay, Xinjiang 834000, China
  • Received:2019-04-08 Online:2020-04-10 Published:2020-04-10

摘要: 吉木萨尔凹陷二叠系芦草沟组为一套陆源碎屑与碳酸盐矿物混积岩层,矿物类型复杂多样,目前对于芦草沟组岩性的命名方案还存在争议,大大影响了钻井现场对岩性识别的效率。利用X射线荧光光谱分析方法(XRF)、X射线矿物衍射方法(XRD)综合分析岩石的矿物成分及元素含量之间的关系,采用元素交会图版法建立了长石岩屑砂岩、粉细砂岩、泥岩、泥晶白云岩、砂屑云岩及云屑砂岩等6类岩性识别图版,对比发现,符合率可以达80%。这为致密油混积岩现场岩性及甜点识别提供了较好的方法,可以有效指导岩性识别及现场水平井地质导向工作。

关键词: 致密油, 混积岩, 吉木萨尔, XRF, XRD

Abstract: The Permian Lucaogou Formation in the Jimsar Sag is a set of terrigenous clastic and carbonate mineral mixed rock layers with complex and diverse mineral types. Currently, controversy still exists surrounding the naming conventions for the lithology of the Lucaogou Formation, which has greatly affected the efficiency of lithology identification at drilling sites. In this paper, X-ray fluorescence (XRF) and X-ray diffraction (XRD) were applied to the comprehensive analysis of the relationship between rock mineral composition and elemental content. By adopting the element cross-plot method, we established six types of lithological identification plots, including feldspar lithic sandstone, fine sandstone, mudstone, mudstone dolomite, sandy dolomite, and dolomitic sandstone. Comparative analysis revealed that the coincidence rate can reach 80%. This provides a good method for in situ lithology and sweet-spot identification of tight oil mixed rock, which could effectively guide lithology identification and geosteering of horizontal wells on site.

Key words: tight oil, mixed rock, Jimsar, XRF, XRD

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