吉林大学学报(地球科学版) ›› 2015, Vol. 45 ›› Issue (4): 983-992.doi: 10.13278/j.cnki.jjuese.201504102

• 地质与资源 • 上一篇    下一篇

鄂尔多斯盆地延长组致密油成藏控制因素

姚泾利1,2, 赵彦德1,2,3, 邓秀芹1,2, 郭正权1,2, 罗安湘1,2, 楚美娟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;
    3. 兰州大学地质科学与矿产资源学院, 兰州 730000
  • 收稿日期:2015-01-12 发布日期:2015-07-26
  • 通讯作者: 赵彦德(1973),男,博士研究生,高级工程师,主要从事石油地质综合研究,E-mail:zhaoyand_cq@petrochina.com.cn. E-mail:zhaoyand_cq@petrochina.com.cn
  • 作者简介:姚泾利(1964),男,高级工程师,博士,主要从事油气勘探及综合地质研究,E-mail:yjl_cq@cnpc.com.cn
  • 基金资助:

    国家科技重大专项项目(2011ZX05044,2011ZX05001-004);国家"973"计划项目(2012CB822003)

Controlling Factors of Tight Oil Reservior in Triassic Yanchang Formation in Ordos Basin

Yao Jingli1,2, Zhao Yande1,2,3, Deng Xiuqin1,2, Guo Zhengquan1,2, Luo Anxiang1,2, Chu Meijuan1,2   

  1. 1. Research Institute of Exploration & Development of PetroChina Changqing Oilfield Company, Xi'an 710018, China;
    2. National Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Fields, Xi'an 710018, China;
    3. School of Earth Science, Lanzhou University, Lanzhou 730000, China
  • Received:2015-01-12 Published:2015-07-26

PDF (PC)

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摘要：

鄂尔多斯盆地延长组发育我国典型的低渗透和特低渗透油气资源,其油藏呈现出储层致密、储集砂体预测难度大、成藏机理复杂等特征.目前,根据勘探开发实践,长庆油田成功实现对渗透率大于0.3×10-3μm2油藏的开发,目前正在开展渗透率为(0.1~0.3)×10-3 μm2致密砂岩储层的技术攻关.笔者结合国外最新致密油气资源研究成果和鄂尔多斯盆地延长组低渗透油藏的特征,从延长组致密油分布、致密油流体特征、赋存状态、储集体和致密油形成的控制因素入手,对鄂尔多斯盆地延长组致密油形成与分布规律进行了探讨.确定了延长组致密油形成的控制因素:①长7优质烃源岩分布范围广,生烃强度大,为致密油形成提供了充足的油源供给和资源基础;②大面积广泛展布的复合叠加的碎屑岩储集体,为致密油藏形成提供了储集空间;③油页岩与致密砂岩互层共生,形成了近源成藏的有利配置关系;④成藏期生烃增压,致密储层石油充注程度高,为致密油形成提供了运移动力.

关键词: 致密油, 控制因素, 延长组, 储层, 鄂尔多斯盆地

Abstract:

Ordos basin is a typical area of distribution of low permeability and ultra-low permeability oil reservoirs. Triassic Yanchang Formation is rich in low permeability oil reservoirs. They are characterized by many sets of thin sand layers containing oil with large reserve, low reserve abundance, and low single well production. Based on exploration and development practices, greater than 0.3×10-3μm2 permeability reservoirs have been well exploited in Changqing oilfield, while (0.1-0.3)× 10-3μm2 tight sandstone reservoir is currently the focus for exploration and development. The controlling factors of tight oil reservoirs in Triassic Yanchang Formation were investigated. The tight oil in Yanchang Formation is featured as large-sized sand body complex, tight reservoir, complicated pore throat structure, high content of rigid components, abundant fracture and saturation, low fluid pressure, et al. The forming of the large-scaled superimposed tight oil reservoir is controlled by the combination of the interbed lithology of wide-ranging source rock and reservoirs with strong hydrocarbon generation and expulsion during the geological history.

Key words: tight oil, controlling factors, Yanchang Formation, reservoirs, Ordos basin

中图分类号: 

  • P618.13

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