岩性油气藏 ›› 2015, Vol. 27 ›› Issue (5): 196–203.doi: 10.3969/j.issn.1673-8926.2015.05.032

• 油气地质 • 上一篇    下一篇

鄂尔多斯盆地北部盒 8 段砂体形成机理分析

刘晓鹏1,2,赵小会1,2,康 锐1,2,漆亚玲1,2   

  1.  1. 中国石油长庆油田分公司 勘探开发研究院,西安 710018 ;2. 低渗透油气田勘探开发国家工程实验室,西安 710018
  • 出版日期:2015-09-26 发布日期:2015-09-26
  • 作者简介:刘晓鹏( 1978- ),男,硕士,工程师,主要从事天然气勘探、生产及科研方面的工作。 地址:( 710018 )陕西省西安市未央区兴隆园小区长庆油田勘探开发研究院。 E-mail : liuxiaop1_cq@petrochina.com.cn
  • 基金资助:

    国家重大科技专项“鄂尔多斯盆地天然气富集规律、目标评价与勘探关键技术”(编号: 2011ZX05007-004 )资助

Formation mechanism of sand bodies of the eighth member of Shihezi Formation in northern Ordos Basin

Liu Xiaopeng12, Zhao Xiaohui12, Kang Rui12, Qi Yaling12   

  1.  1. Research Institute of Exploration and Development , Petrochina Changqing Oilfield Company , Xi ’ an 710018 , China ; 2. National Engineering Laboratory for Low Permeability Oil and Gas Fields Exploration and Development , Xi ’ an 710018 , China
  • Online:2015-09-26 Published:2015-09-26

摘要:

为了明确鄂尔多斯盆地北部二叠系盒 8 段大面积砂体的形成机理,在分析砂体展布特征的基础上,全面恢复了盒 8 期湖盆底形、湖泊与外界的连通性、物源供给及水动力条件等沉积古环境要素,并结合水槽沉积模拟实验,建立了盒 8 段沉积模式。 研究认为:充足的物源供给、较强的水动力、多水系输砂、平缓的湖盆底形、盆地快速稳定的沉降和湖岸线大范围反复波动,是盒 8 段大面积砂体形成的必要条件;鄂尔多斯盆地鄂托克前旗―榆林以南、L63井S318井Y101井Y112 井以北区域,是下一步的有利勘探目标。

关键词: 地震沉积学, 薄层砂体, 拓频处理, 相位转化, 地层切片, 地震属性

Abstract:

In order to clarify the formation mechanism of sand bodies in the eighth member of Permian Shihezi Formation in the northern Ordos Basin, the sedimentary palaeoenvironments including basin character, the connectivity of lake and the outside world, provenance supply and hydrodynamic force conditions were recovered on the base of the characteristics of sand body distribution. Combined with the sedimentary simulation, the sedimentary model of the eighth member of Shihezi Formation was established. The result shows that sufficient sediment supply, strong hydrodynamic force, abundant clastic supplying by several rivers, broad flat topography, stable and rapid basin subsidence and lake level fluctuate with large range are the main factors responsible for the large-area sand bodies of the eighth member of Shihezi Formation. The area from the north of L63 well, S318 well, Y101 well and Y112 well to south of Etuokeqianqi-Yulin area in Ordos Basin is the favorable target for exploration in the future.

Key words: seismic sedimentology , thin sand body , spectrum decomposition, phase transform , strata slice, seismic attributes

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