新疆石油地质

新疆石油地质 ›› 2005, Vol. 26 ›› Issue (2): 137-141.

• 油气勘探 • 上一篇    下一篇

准噶尔盆地腹部下侏罗统三工河组沉积体系

王居峰1,2, 邓宏文1, 蔡希源3   

  1. 1.中国地质大学 北京 100083;
    2.中国石化 胜利油田有限公司 地质科学研究院 山东 东营 257015;
    3.中国石化 西北新区勘探指挥部,乌鲁木齐 830000
  • 收稿日期:2004-07-29 出版日期:2005-04-01 发布日期:2020-08-24
  • 作者简介:王居峰(1968-),男,山东招远人,在读博士研究生,石油地质.(Tel)0546-8715726(E-mail)wangjuf@:slof.com.

Depositional System of Sangonghe Formation of Lower Jurassic in Hinterland of Junggar Basin

WANG Ju-feng1,2, DENG Hong-wen1, CAI Xi-yuan3   

  1. 1. China University of Geosciences, Beijing 100083, China;
    2. Research Institute of Geosciences, Shengli Oilfield Company Ltd, Sinopec,Dongying, Shandong 257015, China;
    3. New Area Prospecting Headquarters of Northwestern China, Sinopec, Urumqi, Xinjiang 830000, China
  • Received:2004-07-29 Online:2005-04-01 Published:2020-08-24

PDF

227

摘要： 以岩心观察为基础,结合砂岩含量的变化及钻井、测井特征、地震反射等标志,总结了准噶尔盆地腹部侏罗系三工河组的沉积微相类型及相标志。指出,三工河组沉积时期砂体沉积微相的发育与分布主要受北东和北西方向物源体系的控制;由于不同沉积时期基准面与A/S比值的动态变化、物源体系特征及古地貌形态等的差异,导致了研究区东、西部沉积相类型及演化特征的差异;垂向上,沉积作用经历了由辫状河三角洲(扇三角洲)一曲流河三角洲一湖相的变化,其中三工河组中、晚期形成的三角洲前缘河口坝砂体和水下分支水道砂体是最重要的勘探目标。

关键词: 准噶尔盆地, 侏罗系, 沉积相, 沉积旋回, 演化

Abstract: This paper reviews the microfacies' type and markers of Jurassic Sangonghe formation in hinterland of Junggar Basin based on core observation and combining with the variation of sand percentage as well as drilling/logging features and seismic reflection indicators, and points out that the growth and distribution of the sand microfacies in Sangonghe stage are controlled by the depositional sources form both northeast and northwest directions. The changes of datum level and A/S ratio and the diversity of depositional source systems and paleo-relief cause the differences in sedimentary facies type and volution characteristics of eastern and western parts of the study area. Ver- tically, the sedimentary facies has undergone the changes from braided river delta (fan delta) to meandering river delta to lacustrine facies, among which the mouth bar sands at the delta front formed in middle and late Sangonghe stage and those of underwater distributary chan- nel are the most important targets for exploration.

Key words: Junggar basin, Jurassic, sedimentary facies, sedimentary cycle, evolution

中图分类号: