天然气地球科学

• 天然气地质学 • 上一篇    下一篇

吐哈盆地鄯善弧形带东翼中—下侏罗统沉积体系发育模式

杨占龙,黄云峰,沙雪梅,吴青鹏,黄小鹏,郝彬   

  1. 1.中国石油勘探开发研究院西北分院,甘肃 兰州 730020;
    2.中国石油集团油藏描述重点实验室,甘肃 兰州 730020
  • 收稿日期:2017-03-14 修回日期:2018-02-13 出版日期:2018-03-10 发布日期:2018-03-10
  • 作者简介:杨占龙(1970-),男,甘肃宁县人,高级工程师,博士,主要从事岩性油气藏勘探方法技术与含油气盆地油气地质特征综合评价研究.E-mail:yang_zl@petrochina.com.cn.
  • 基金资助:
    国家科技重大专项“岩性地层油气藏区带、圈闭评价方法与关键技术” (编号:2017ZX05001-003)资助.
     
     

Developmental pattern of depositional system of the Lower to Middle Jurassic,east wing of Shanshan arc-shape belt in Turpan-Kumul Basin

Yang Zhan-long,Huang Yun-feng,Sha Xue-mei,Wu Qing-peng,Huang Xiao-peng,Hao Bin   

  1. 1.Northwest Branch,Research Institute of Petroleum Exploration & Development,PetroChina,Lanzhou 730020,China;
    2.Key Laboratory of Reservoir Description,China National Petroleum Corporation,Lanzhou 730020,China
  • Received:2017-03-14 Revised:2018-02-13 Online:2018-03-10 Published:2018-03-10

摘要:

为了有效分析油气藏与沉积体系平面展布之间的“不协调性”并优选富油气区带有利扩展勘探方向,以地震沉积体系分析为出发点,以钻井揭示的砂体类型与平面分布分析为依据,结合断裂体系平面展布与纵向演化分析,系统建立了吐哈盆地台北凹陷鄯善弧形带东翼中—下侏罗统沉积体系发育模式。结果表明,自南向北发育的以水下分流河道为主的沉积体系受近东西向断裂系早期正断层发育期下降盘的明显输导与控制;发育有2种类型的沉积砂体:一类是包含底部载荷、粒度较粗、在东西向断裂体系断距较小部位发育的近南北向水下分流河道主沟槽砂体;另一类是以悬浮载荷为主、粒度较细、依附早期正断层发育期下降盘地形低部位发育的厚层块状或互层砂体。受近东西向断裂的约束与输导,南物源沉积体系不同分支的水下分流河道砂体依附近东西向断裂、在断裂低部位互层发育或叠加连片。近东西向断裂北侧发育的厚层块状或互层砂体形成的岩性圈闭是鄯善弧形带东翼中—下侏罗统深化勘探的有利方向。

关键词: 沉积体系, 发育模式, 砂体类型, 中&mdash, 下侏罗统, 鄯善弧形带东翼, 吐哈盆地

Abstract:

For the purpose to effectively analyze the“mismatching” of the plane distribution between reservoirs and depositional systems and then determine the favorable extended exploration domains of oil-rich zone,taking the sedimentary system analysis of seismic as the beginning,based on sandstone types and plane distribution of the drills and combining the plane distribution and vertical evolution of the fault system,the developmental pattern of the depositional system of the lower to Middle Jurassic of the east wing of the Shanshan arc-shape belt,Taibei Sag of Turpan-Kumul Basin,is systemically established.The results show that the sedimentary system mainly of the underwater distributary channel from south to north is obviously guided and controlled by the downthrows of the earlier normal fault system nearly in east-west extension;There are mainly two types of sandstone in the Lower to Middle Jurassic in the east wing.One is the main trench sandstone of the underwater distributary channel in SN direction,which contained the bed-loads,relatively coarse in grain size and situated at the small throw position of the faults in EW extension.The other is the thick massive or interbedded sandstone,which mainly composed of the suspended loads,relatively fine in grain size and accommodated in the lower part attaching the downthrows in the early normal fault period.Constrained and guided by the EW extension faults,the sandstones from different branches of the underwater distributary channel of the south provenance are deposited interbedded or superimposed in the lower part attaching the EW faults.The lithologic traps,formed by the thick massive or interbedded sandstone in the north of the EW faults,are the prospecting domain for the extended exploration of the Lower to Middle Jurassic in the east wing of the Shanshan arc-shape belt.

Key words: Depositional system, Developmental pattern, Type of sandstone, Lower to Middle Jurassic, East wing of Shanshan arc-shape belt, Turpan-Kumul Basin

中图分类号: 

  • TE122.2

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