石油学报 ›› 2017, Vol. 38 ›› Issue (9): 1021-1035,1065.DOI: 10.7623/syxb201709004

• 地质勘探 • 上一篇    下一篇

咸化湖盆混积岩分类与混积相带沉积相特征——以准噶尔盆地南缘芦草沟组与吐哈盆地西北缘塔尔朗组为例

王越1,2,3, 陈世悦1, 张关龙2, 张奎华2, 林会喜2, 梁绘媛4, 汪誉新2, 李佳2   

  1. 1. 中国石油大学地球科学与技术学院 山东青岛 266580;
    2. 中国石油化工股份有限公司胜利油田分公司勘探开发研究院 山东东 营 257015;
    3. 中国石油化工集团公司胜利石油管理局博士后科研工作站 山东东营 257000;
    4. 中国石油化工股份有限公司胜利油田分公司东胜集团股份公司 山东东营 257000
  • 收稿日期:2016-12-20 修回日期:2017-06-06 出版日期:2017-09-25 发布日期:2017-10-09
  • 通讯作者: 王越,男,1988年2月生,2010年获中国石油大学(华东)地质学专业学士学位,2017年获中国石油大学(华东)地质学专业博士学位,现为中国石油化工股份有限公司胜利油田分公司勘探开发研究院博士后,主要从事沉积学及层序地层学方面的研究工作。Email:620788364@qq.com
  • 作者简介:王越,男,1988年2月生,2010年获中国石油大学(华东)地质学专业学士学位,2017年获中国石油大学(华东)地质学专业博士学位,现为中国石油化工股份有限公司胜利油田分公司勘探开发研究院博士后,主要从事沉积学及层序地层学方面的研究工作。Email:620788364@qq.com
  • 基金资助:

    国家自然科学基金项目(No.41372107)资助。

Classifications of mixosedimentite and sedimentary facies characteristics of mixed sedimentary facies belt in saline lacustrine basin:taking examples as the Lucaogou Formation in the south of Junggar Basin and the Taerlang Formation in the northwest of Tuha Basin

Wang Yue1,2,3, Chen Shiyue1, Zhang Guanlong2, Zhang Kuihua2, Lin Huixi2, Liang Huiyuan4, Wang Yuxin2, Li Jia2   

  1. 1. School of Geosciences, China University of Petroleum, Shandong Qingdao 266580, China;
    2. Research Institute of Petroleum Exploration and Development, Sinopec Shengli Oilfield Company, Shandong Dongying 257015, China;
    3. Postdoctoral Scientific Research Station, Sinopec Shengli Petroleum Administration Bureau, Shandong Dongying 257000, China;
    4. Dongsheng Group Company Limited, Sinopec Shengli Oilfield Company, Shandong Dongying 257000, China
  • Received:2016-12-20 Revised:2017-06-06 Online:2017-09-25 Published:2017-10-09

摘要:

通过露头精细观察、薄片鉴定与X射线衍射等方法,对具有咸水沉积背景的准噶尔盆地南缘芦草沟组与吐哈盆地西北缘塔尔朗组的混积特征进行研究,提出"混积相带"的概念来表征"湖盆中发育混积岩和混积层系的相带",并厘定了研究区"混积岩"的定义,建立一种新的混积岩分类命名方案,进而系统研究了混积相带的岩相、沉积相特征,并预测了有利相区。"混积岩"为"陆源碎屑与内源非后期成岩作用形成的碳酸盐组分在同一岩层内混合形成的沉积岩",陆源碎屑与碳酸盐组分的含量不存在一个具体的下限标准。研究区混积相带内大部分粉砂岩、碳酸盐岩与泥页岩和少部分砂岩主要由陆源碎屑颗粒、碳酸盐组分和黏土矿物构成,属于混积岩,以三组分的相对含量50%为界将混积岩划分为(粉)砂岩、碳酸盐岩和正混积岩3大类,进一步划分为9小类。在此基础上,根据露头的岩性、粒度、沉积构造和颜色等特征在混积相带内共识别出21种岩相类型和9种岩相组合,依此将混积相带划分为近岸水下扇外扇、扇三角洲前缘、浊积扇和半深湖—深湖。综合露头观察、有机碳测试、物性测试及扫描电镜观察等方法,认为半深湖—深湖与浊积扇为混积相带内的有利相区,二者内部的烃源岩、储集岩条件相对较好,可形成良好的生储组合。

关键词: 混积岩, 岩相, 混积相带, 塔尔朗组, 芦草沟组, 准噶尔盆地, 吐哈盆地, 咸化湖盆

Abstract:

Based on the fine observation of outcrop, thin section authentication, X-ray diffraction, and other methods, the mixed sedimentary characteristics of Lucaogou Formation at the southern margin of Junggar Basin and Taerlang Formation at the northwestern margin of Tuha Basin with saline sedimentation background are studied. This aims to propose a concept of "mixed sedimentary facies belt" for characterizing "the facies belt of mixosedimentite and mixed sedimentary beds developed in lacustrine basin", defining the "mixosedimentite" in the study area, and establishing a new classification-naming scheme of mixosedimentite, so as to systematically study the characteristics of lithofacies and sedimentary facies in mixed sedimentary facies belt and predict favorable facies areas. Mixosedimentite is defined as the sedimentary rock formed by the mixing of carbonate component in the same rock stratum due to the effect of terrigeneous clastics and endogenous non-late diagenesis, and there is no specific minimum standard for the content of terrigenous clasticsl and carbonate component. In the mixed sedimentary facies belt of the study area, a majority of siltstones, carbonates, shale and a minority of sandstones are mainly composed of terrigenous clastic particles, carbonate components and clay minerals, belonging to mixosedimentite. According to the relative content of three-components of 50%, the mixosedimentite was divided into three major types including (silt) sandstones, carbonates and positive mixosedimentite, and then further divided into nine minor types. On this basis, according to the lithology, grain size, sedimentary structure and color of outcrop, 21 lithofacies types and 9 lithofacies assemblages are identified in the mixed sedimentary facies belt, which are used to divide the mixed sedimentary facies belt into the outer fan of offshore submarine fan, fan delta front, turbidite fan and semi-deep to deep lake. In combination with the methods of outcrop observation, organic carbon test, physical property test and SEM observation, it is considered that semi-deep to deep lake and turbidite fan are favorable facies zones in the mixed sedimentary facies belt, in which the conditions of source rocks and reservoir rocks are excellent and able to form good source-reservoir assemblages.

Key words: mixosedimentite, lithofacies, mixed sedimentary facies belt, Taerlang Formation, Lucaogou Formation, Junggar Basin, Tuha Basin, saline lacustrine basin

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