地学前缘 ›› 2016, Vol. 23 ›› Issue (5): 75-85.DOI: 10.13745/j.esf.2016.05.008

• 沉积与储层 • 上一篇    下一篇

柴达木盆地北缘东段石炭系残留分布及控制因素

 程荣, 肖永军, 林会喜, 柳忠泉, 王大华   

  1. 1. 中国石化 胜利油田分公司 勘探开发研究院, 山东 东营 257015
    2. 中国石化 胜利油田分公司 勘探开发研究院西部分院, 山东 东营 257000
  • 收稿日期:2015-10-20 修回日期:2016-01-21 出版日期:2016-09-15 发布日期:2016-09-15
  • 通信作者: 肖永军(1981—)，男，副研究员，主要从事油气地质综合研究。E-mail:xiaoyongjun.slyt@sinopec.com
  • 作者简介:程荣(1983—)，女，工程师，主要从事油气地质综合研究。
  • 基金资助:

    中国地质调查局项目“柴达木盆地油气资源潜力评价”(1212010818054)；中国地质调查局项目“柴达木盆地古生代油气资源调查评价”(1212011120964)；中国石化重大专项“西部挤压盆地山前带综合建模研究与目标评价”(P11077)

A study of Carboniferous stratigraphic distribution and controlling factors in the eastern section of North Qaidam.

 CHENG  Rong, XIAO  Yong-Jun, LIN  Hui-Chi, LIU  Zhong-Quan, WANG  Da-Hua   

  1. 1. Research Institute of Exploration and Development, Shengli Oilfield Company, SINOPEC, Dongying 257015, China
    2. Western Branch Research Institute of Exploration and Development, Shengli Oilfield Company, SINOPEC, Dongying 257000, China
  • Received:2015-10-20 Revised:2016-01-21 Online:2016-09-15 Published:2016-09-15

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摘要：

柴达木盆地北缘东段石炭系是侏罗系之外的另一套有利生烃层系，针对前人“石炭系为广泛分布于柴达木盆地各残留凹陷”的普遍认识与实际钻探不相符的矛盾，笔者充分利用野外地质调查、钻井、地震、电法等成果资料，通过露头引层、钻井标定、地震相与速度谱识别等方法手段，进行了石炭系顶底界面的追踪解释，重新厘定了柴北缘东段石炭系残留地层分布，并通过平衡剖面恢复分析了自古生代以来的构造演化特征及其对石炭系残留分布的控制作用。结果表明，柴达木盆地东部石炭系平面上残留分布于西段的尕丘凹陷和东段的欧南、霍布逊、德令哈等凹陷，发育尕丘、欧南、霍布逊等多个厚度中心；西段尕西—鱼卡凹陷、马海大红沟凸起、大柴旦凹陷、红山—小柴旦凹陷等基本无石炭系残留；印支末期构造运动造成不同构造单元的差异隆升剥蚀是控制石炭系残留分布及其厚度差异的主要因素，燕山晚期和喜山晚期构造运动造成残留分布的分隔性较强。

关键词: 控制因素, 构造演化, 残留分布, 石炭系, 柴北缘东段

Abstract:

Carboniferous is another favourable hydrocarbon source rocks in the eastern section of North Qaidam, besides the Jurassic. There are some conflicts between the drilling data and the previous view that Carboniferous deposited in broad basin and the residue stratum distributed in some of the present sag. The author made full use of the achievement data such as field geological investigation, drilling, seismic, electrical, etc. By using the methods of the outcrops, drilling calibration, seismic facies and velocity spectrum recognition, we traced and interpreted the top and bottom interface of the Carboniferous. The distribution of Carboniferous residual stratum of the eastern section of North Qaidam has been redetermined. According to the balanced section, the characteristics of basin tectonic evolution were analyzed and its impact on the Carboniferous strata distribution were explored. The results show that there was a complete transgressive sedimentary cycle in Carboniferous of the eastern section of Qaidam. Residual stratum is mainly distributed in the western section of Gaqiu sag and eastern section of Ounan sag, Huobuxun sag and Delinha sag. There is almost no Carboniferous residual in the western section of GaxiYuqia sag，MahaiDahonggou salient, Dachaidan sag and HongshanXiaochaidan sag. The Carboniferous residual strata distribution is controlled by the tectonic movement in the later period of IndoChinese epoch. Affected by the YanshanianHimalayan tectonic movement, there were strong separation in the distribution of Carboniferous residual stratum.

Key words: controlling factors, tectonic evolution, residual stratum distribution, Carboniferous, eastern section of north Qaidam

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