新疆石油地质

新疆石油地质 ›› 2010, Vol. 31 ›› Issue (1): 37-39.

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柴达木盆地狮子沟地区中深层储集空间形成机制

孙平安1, 曹剑1, 冯进来1, 胡凯1, 刘云田2, 王国彦2, 杨树逸2   

  1. 1.南京大学 地球科学系,南京 210093;
    2.中国石油 青海油田分公司,甘肃 敦煌 736202
  • 收稿日期:2009-08-12 修回日期:2009-10-22 发布日期:2020-07-27
  • 作者简介:孙平安(1986-),男,浙江台州人,硕士,石油地质,(E-mail)safesun@163.com.
  • 基金资助:
    国家自然科学基金项目(40602014和40872086)

Formation Mechanism of Middle-Deep Reservoir Space in Shizigou Area in Qaidam Basin

SUN Ping-an1, CAO Jian1, FENG Jin-lai1, HU Kai1, LIU Yun-tian2, WANG Guo-yan2, YANG Shu-yi2   

  1. 1. Department of Earth Sciences, Nanjing University, Nanjing, Jiangsu 210093, China;
    2. Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu 736202, China
  • Received:2009-08-12 Revised:2009-10-22 Published:2020-07-27

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摘要： 柴达木盆地狮子沟地区目前发现的油气主要聚集于中深层古近-新近系,其储集空间基本类型主要包括剩余原生粒间孔隙、次生溶蚀孔洞和裂缝,并形成5类储集空间组合。具有储渗意义的储集空间类型主要是次生溶蚀孔洞和裂缝。受压实作用和胶结充填作用以及沉积环境的影响,剩余原生粒间孔隙不甚发育,而次生溶蚀孔洞和构造裂缝发育。除了油源流体外,大气降水可能在有效储集空间的形成中起到过重要作用。

关键词: 柴达木盆地, 狮子沟地区, 古近系, 新近系, 储集层

Abstract: Petroleum in Shizigou area in southwestern Qaidam basin is mainly found in the middle-deep reservoirs of Tertiary, where the types of reservoir space generally include remained primary intergranular pore, secondary solution pore and fracture. These types may form five combinations of reservoir spaces. The favorable reservoir spaces cover secondary solution pore and fracture. The remained primary intergranular pores are normally undeveloped due to sedimentary environment, compaction, cemented fill and diagenesis, while the secondary solution pore/vug and fracture are relatively developed because of dissolution and tectonic/structural fracture effects. Besides hydrocarbon fluid, the meteoric water may play an important role to the formation of effective reservoir spaces.

Key words: Qaidam basin, Shizigou area, Tertiary, reservoir

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