石油与天然气地质 ›› 2002, Vol. 23 ›› Issue (3): 266-268,273.doi: 10.11743/ogg20020314

• 油气空间 • 上一篇    下一篇

松辽盆地梨树凹陷泉头组沉积特征

唐黎明, 何兴华   

  1. 中国石化新星东北分公司, 吉林长春, 130062
  • 收稿日期:2002-07-17 出版日期:2002-09-25 发布日期:2012-01-16

SEDIMENTARY CHARACTERISTICS OF QUANTOU FORMATION IN LISHU SAG OF SONGLIAO BASIN

Tang Liming, He Xinghua   

  1. Northeast Filiale of Newstar Company, SINOPEC, Changchun, Jilin
  • Received:2002-07-17 Online:2002-09-25 Published:2012-01-16

摘要:

松辽盆地梨树凹陷泉头组主要发育有冲积扇、辫状河、曲流河、浅水湖和滨浅湖等沉积相,盆地的轻微振荡性升降使其沉积演化可分为 4个时期,早期 (泉一段)是断陷沉积向坳陷沉积转换的过渡时期;中期 (泉二段)由于盆地沉降速率大,河流冲积作用弱,发育了大规模的浅水湖,沉积环境由浅水湖、洪泛洼地和少量曲流河组成;晚期 (泉三段—泉四段中期)区域沉积变缓、河流作用再度增强,形成十分发育的储层段;末期 (泉四段晚期)受全盆地发展影响,松辽大湖盆形成雏形并开始扩展。泉头组的沉积演化经历了河流冲积平原沉积的完整沉积序列,代表了松辽盆地断坳转换时期的沉积特征。

关键词: 泉头组, 沉积相, 演化, 梨树凹陷

Abstract:

The mainly developments of sedimentary facies in Quantou Formation of Lishu Sag in Songliao basin are as follows: alluvial fan, braided river, mendering river, shallow water lake and shore shallow water lake etc. Slightly vibration-uplift and subsidence of the basin make it possible to divide it sedimentary evolution into 4 stages; early stage(Quan No.1 interval) is the stage of fault subsidence transited to sag deposition; middle stage(Quan No.2 interval) is the stage of large scale shallow water lakes developed due to great subsidence rate of the basin and weak effects of river alluviation, and sedimentary environment is composed of shallow water lakes, flooding lacunae and a few meandering rivers; later stage(Quan No.3 interval and middle stage of Quan No.4 interval) reservoir intervals were quite developed due to the slow down of regional sedimentation and reinforcement of river effect; during final stage(later stage of Quan No.4 interval)Songliao big lake-basin came into an embryonic form and began to expand due to the effect of the development of the whole basin. Sedimentary evolution of Quantou Formation has experienced a complete sedimentary sequence of river alluvium plain sedimentation representing the sedimentary characteristics of transformational period of Songliao basin fault sag.

Key words: Quantou Formation, sedimentary facies, evolution, Lishu sag

中图分类号: