西南石油大学学报(自然科学版) ›› 2002, Vol. 24 ›› Issue (6): 4- 6.DOI: 10.3863/j.issn.1000-2634.2002.06.002

• 地质勘探 • 上一篇    下一篇

鄂尔多斯东部上古生界储层特征及控制因素

李凌 王兴志 方少仙 侯方浩   

  1. 西南石油学院资源与环境学院, 四川南充637001
  • 收稿日期:2002-04-11 修回日期:1900-01-01 出版日期:2002-12-20 发布日期:2002-12-20
  • 通讯作者: 李凌

RESERVOIR CHARACTERISTICS AND CONTROLLING FACTORS OF THE UPPER PALEOZOIC SANDSTONE,EASTERN ORDOS BASIN

L I Ling WANG Xing-zhi FANG Shao-xian HOU Fang-hao   

  1. Oil & Gas Geology Research Institute ,SouthwestPetroleum Institute , Nanchong Sichuan 637001 , China
  • Received:2002-04-11 Revised:1900-01-01 Online:2002-12-20 Published:2002-12-20
  • Contact: LI Ling

摘要: 鄂尔多斯盆地上古生界主要有太2 、山2 、山1 、盒8 、盒7 五个气层组。对盆地东部佳县—子洲地区的研究表明:该区储层属于低孔低渗、具有较强非均质性的孔隙型、裂缝—孔隙型碎屑岩储层。储层储集空间类型以孔隙为主,孔隙主要为粒间孔、粒间残余孔、粒内溶孔和高岭石晶间孔。较为发育的微裂缝对储层的储集性影响不大,主要改善储层的渗滤性。影响储层储渗性的主要因素包括沉积作用、成岩作用及构造作用。粗粒度和高成熟度的储层具有相对好的物性;压实作用、硅质胶结和高岭石胶结充填作用是导致储层致密的主要因素,埋藏溶蚀作用使储层得到改善;构造破裂产生的微裂缝亦对储层起到一定的改善。
  

关键词: 鄂尔多斯盆地, 上古生界, 储层, 碎屑岩, 成岩作用

Abstract: The Upper Paleozoic in Ordos includes four gas formations such as Tai2 , han2 , He8 and He7. Studies on them show the reservoirs are defined as the poreOtype and fractureOpore type sandstone with low porosity and low permeability , as well as markable heterogeneity. The type of reservoir’s pore space is mainly pore , which can be subdivided into four sorts , i. e. , intergranular pore , residual intergranular , intragranular dissolved pore as well as Kaolin intercrystal pore. The widespreading micro - fracture has minor effect on changing the reservoir’s porespace , but it can increase the reservoir’s permeability. The main factors that control reservoirs include deposition , diagenesis and tectogenesis. The reservoir with coarser grain size and higher maturity has better porosity and permeability. It’s compaction , silicon cement and Kaolin cement that account for the
tight reservoir. Dissolution and tectonic microOfracture are favorable to improve the reservoir.

Key words: Ordos basin, Upper Paleozoic, reservoir, clastic rock, diagenesis

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