西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

松辽盆地南部西斜坡层序格架内油气成藏特征

董艳蕾1,朱筱敏1 *,成克男2,杨海风3   

  1. 1. 中国石油大学(北京)地球科学学院,北京昌平102249;2. 中国石油长城钻探工程有限公司录井国际业务项目部,北京朝阳100101;
    3. 中海石油(中国)有限公司天津分公司技术部,天津滨海300452
  • 出版日期:2015-04-01 发布日期:2015-04-01
  • 通讯作者: 朱筱敏,E-mail:xmzhu@cup.edu.cn
  • 基金资助:

    国家自然科学基金(41202078,41272133);中国石油大学(北京)科研基金(KYJJ2012 – 01 – 31)。

Hydrocarbon Accumulation Characteristic in Sequence Stratigraphy
Framework of Western Slop Area,Southern Songliao Basin

Dong Yanlei1, Zhu Xiaomin1*, Cheng Kenan2, Yang Haifeng3   

  1. 1. School of Geosciences,China University of Petroleum(Beijing),Changping,Beijing 102249,China
    2. Mudlogging International Department,Greatwall Drilling Company,CNPC,Chaoyang,Beijing 100101,China
    3. Department of Technology,Tianjin Company,CNOOC,Binhai,Tianjin 300452,China
  • Online:2015-04-01 Published:2015-04-01

摘要:

松辽盆地南部西斜坡泉四段—嫩一段可划分为6 个三级层序、18 个体系域。通过对烃源岩、储层、盖层、圈闭
类型和油气输导与运移等成藏要素的综合分析,指出油气主要来自于中央凹陷区烃源岩,并具有厚度大,丰度高的特
点;储层以辫状河三角洲前缘相砂体为主,厚度大、物性好,属于中孔—中渗、高孔—高渗型储层;广泛发育的SQn1
泥岩是西斜坡的区域盖层;圈闭以构造圈闭、复合圈闭和地层—岩性圈闭为主;西斜坡油气分布具有明显的油气运移
转折带,油气在转折带以西以侧向运移为主,而在转折带以东以阶梯式运移为主。依据西斜坡地质条件差异与油气成
藏特点,划分出3 个有利区带,并总结了各自的成藏模式,分别为以“近源供烃、断层垂向输导、阶梯式成藏”模式为主
的SQy 三角洲前缘带与SQqn3 坡折带,及以“远源供烃、砂体侧向输导、有效圈闭成藏”模式为主的SQy 盆缘超覆带。

关键词: 层序格架, 成藏要素, 油气运移转折带, 成藏模式, 西斜坡, 松辽盆地南部

Abstract:

The fourth member of Quantou Formation to the first member of Nenjiang Formation in south Songliao Basin can be
divided into six third-order sequences and eighteen system tracts. The analysis of hydrocarbon accumulation factors,including
source rock,reservoir,cap rock,trap type and oil migration,reveals that the hydrocarbon are mainly from central depression
source rock and has high thickness and abundance. The sedimentary facies of reservoir is the braided river deltas front. The
sandstone is of high thickness,good property,and middle-high porosity and permeability. The widely developed mudstone
(SQn1)is the regional cap formation. Structural trap,combination trap and stratigraphic- lithologic trap are major trap types in
western slop area. There are migration transition belts,and hydrocarbon migrated in lateral style in the western area of transition
belt,but migrated in ladder style in the eastern area of transition belt. Based on those accumulation characteristics,western
slope area was divided into three favorable accumulation plays. Their accumulation pattern are“near source,vertical migration
of fault,ladder type reservoir”in SQy braided river deltas front and SQqn3 slope-break belt,and“far source for hydrocarbon,
lateral migration of sand body,effective trap reservoir”in SQy basin edge overlap zone.

Key words: sequence stratigraphy framework, accumulation factors, hydrocarbon migration transition belt, accumulation
pattern,
western slop area, south Songliao Basin