石油与天然气地质 ›› 2007, Vol. 28 ›› Issue (4): 491-496.doi: 10.11743/ogg20070408

• 储层沉积、构造及储层预测 • 上一篇    下一篇

鄂尔多斯盆地北部上古生界致密砂岩储层特征及其成因探讨

丁晓琪, 张哨楠, 周文, 邓礼正, 李秀华   

  1. 成都理工大学, "油气藏地质及开发工程"国家重点实验室, 四川, 成都, 610059
  • 收稿日期:2007-06-11 出版日期:2007-08-25 发布日期:2012-01-16

Characteristics and genesis of the Upper Paleozoic tight sandstone reservoirs in the northern Ordos basin

Ding Xiaoqi, Zhang Shaonan, Zhou Wen, Deng Lizheng, Li xiuhua   

  1. State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Chendu University of Technology, Chendu, Sichuan 610059
  • Received:2007-06-11 Online:2007-08-25 Published:2012-01-16

PDF (PC)

791

被引次数

86

摘要：

鄂尔多斯盆地北部上古生界致密砂岩储层具有:1)低孔、低渗、小孔隙、细喉道和渗透率对压力敏感;2)束缚水饱和度高、气水关系复杂;3)储集空间以溶孔和微孔为主、裂缝相对发育的特点。分析认为,上古生界砂岩储层致密的主要原因为古埋藏深度大、热演化程度高、晚成岩阶段的破坏性成岩作用强,热液活动进一步使储层致密化。

关键词: 致密砂岩储层, 成岩作用, 热液活动, 鄂尔多斯盆地北部

Abstract:

The Upper Paleozoic tight sandstone reservoirs in the northern Ordos basin have the following three characteristics:1)low porosity and low permeability(sensitive to pressure changes),small pores,and slim throats;2) high irreducible water saturation and complex gas-water relationship;and 3)reservoir space being dominated by dissolved pores and micropores and fractures being relatively well developed.Analysis of these reservoirs suggests that the tightness of the Upper Paleozoic sandstone reservoirs is mainly caused by large palaeoburial depth,high thermal evolution,strong destructive diagenesis during its late phase,and further compaction of reservoirs evoked by hydrothermal activities.

Key words: tight sandstone reservoir, diagenesis, hydrothermal activity, northern Ordos basin

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