天然气地球科学

• 天然气地质学 • 上一篇    下一篇

柴达木盆地昆北—阿拉尔地区坡折带及其对岩性油气藏的控制

肖传桃,肖胜,叶飞,梁文君   

  1. 长江大学油气资源与勘探技术教育部重点实验室,湖北  武汉 430100
  • 收稿日期:2014-04-03 修回日期:2015-09-23 出版日期:2015-11-10 发布日期:2015-11-10
  • 作者简介:肖传桃(1965-),男,江西九江人,教授,博士生导师,主要从事勘探地层学研究. E-mail:ctxiao@yangtzeu.edu.cn.
  • 基金资助:

    长江大学科学发展基金(编号:2011025);湖北省创新群体基金(编号:2015CFAO24)联合资助.

Slope-break Zone and Its Controls on Lithologic Reservoirof Kunbei-Alaer Area,Qaidam Basin

XIAO Chuan-tao,XIAO Sheng,YE Fei,LIANG Wen-jun   

  1. Key Laboratory of Exploration Technologies for Oil and Gas Resources(Yangtze University),Ministry of Education,Wuhan 430100,China
  • Received:2014-04-03 Revised:2015-09-23 Online:2015-11-10 Published:2015-11-10

摘要:

以坡折带理论为基础,按照成因机制,在柴达木盆地昆北—阿拉尔地区识别出3种类型坡折带,即构造坡折带、沉积坡折带和侵蚀坡折带。昆北断裂坡折带和阿拉尔断裂坡折带属于构造坡折带;跃进Ⅱ—Ⅳ号、昆仑山前坡折带属于沉积坡折带;铁木里克坡折带属于侵蚀坡折带。坡折带对沉积体系和岩性圈闭发育具有明显的控制作用,构造坡折带控制低水位期近岸三角洲扇体和浊积扇扇体的形成,主要发育河道透镜体型岩性圈闭;沉积坡折带主要控制了低水位期辫状河三角洲扇体的发育,侵蚀坡折带控制了低位期充填的侵蚀谷岩性圈闭。根据研究区沉积、储层、油源及运移等成藏条件,开展了坡折带背景下的岩性圈闭预测与评价,总结其岩性油气藏发育成藏模式,综合分析认为跃进Ⅱ—Ⅳ号和尕斯坡折带是发育岩性圈闭的有利区块。

关键词: 坡折带, 岩性油气藏, 沉积体系, 成藏模式, 昆北&mdash, 阿拉尔地区

Abstract:

Based on the theory of slope break zone,according to the genetic mechanism,three types of slope break belts,namely tectonic slope-break zone,sedimentary slope break belt and erosion slope break belt are identified in Kunbei-Alaer area,Qaidam Basin.Northern Kunlun fracture slope break belt and the Alaer fracture slope break belt belong to structural slope-break zone;Yuejin Ⅱ-Ⅳ,Kunlun slope break belt belongs to sedimentary slope break belt;Tielimuke slope break belt belongs to the erosion of slope break belt.Slope break belt has obvious effect on sedimentary system and development of lithologic trap.The structural slope-break belt controls the formation of low water period nearshore delta and turbidite fan body,and the main lens shape lithologic trap development channel.The depositional slope-break belt mainly controls the low water period braided river delta fan body development,and erosion slope break belt controls the erosion valley lithologic trap filled during low water period.According to the deposit in the study area,reservoir,oil source and migration and accumulation conditions,we carried out lithologic trap prediction and evaluation under the background of slope break belt,summarized its patterns lithologic reservoir development.The comprehensive analysis shows that Yuejin Ⅱ-Ⅳ and Gasi slope-break belts are the favorable lithologic trap blocks.

Key words: Slope-break zones, Lithologic oil and gas reservoir, Sedimentary system, Hydrocarbon accumulation mode, Kunbei-Alaer area

中图分类号: 

  • TE122.3

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