西南石油大学学报(自然科学版)

• 地质勘探 •    下一篇

塔河油田4 区岩溶缝洞型储层及其控制因素

  

  1. 1. 西南石油大学资源与环境学院,四川成都610500
    2. 中国石油川庆钻探工程有限公司地质勘探开发研究院,四川成都610052
    3. 中国石化西北油田分公司研究院,新疆乌鲁木齐830011
  • 出版日期:2013-08-01 发布日期:2013-08-01
  • 基金资助:

    国家重大科技专项(2011ZX05049–04)。

Formation and Controlling Factors of Karst Fracture-cave Reservoir in the
4th Block of Tahe Oilfield

  1. 1. College of Resources and Environment,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. Geological Exploration & Development Institute,Chuanqing Drilling Engineering Co. Ltd.,CNPC,Chengdu,Sichuan 610052,China
    3. Research Institute,Northeast Oilfield Branch,SINOPEC,Urumqi,Xinjiang 830011,China
  • Online:2013-08-01 Published:2013-08-01

摘要:

塔河油田4 区下奥陶统碳酸盐岩储层以溶洞、溶孔和裂缝为主,溶洞是最有效的储集体,裂缝次之。基质孔
渗性极差,难以构成有效的储集空间。受海西早期构造运动的影响,研究区发育北北东、北北西以及北东向3 个方向
的裂缝。综合岩芯岩溶特征描述、电子探针元素分析以及同位素分析等方面的研究,发现研究区发育4 期岩溶作用,
其中加里东中晚期与海西早期的岩溶作用对研究区溶洞的形成起到了重要的控制作用。岩溶地貌控制了缝洞型储集
体的分布,处在不同岩溶相带的古水系对缝洞体形态产生影响,断裂及其伴生裂缝增加了地表水及地下水与碳酸盐岩
的接触面积和溶蚀范围,使得研究区内放空漏失井90% 集中在断裂带附近,断裂带是裂缝与岩溶发育的密集带。

null

关键词: 储层类型, 控制因素, 古岩溶, 下奥陶统, 塔河油田

Abstract:

Cave,solution pore and fracture are the primary reservoir spaces in Lower Ordovician,the 4th block of Tahe Oilfield.
Cave is the most effective reservoir,while fracture takes the second place. It is difficult to form effective reservoir for matrix,
owing to its poor porosity and permeability. Effected by the tectonic movement of early hercynian,the fracture was mainly
distributed in the direction of NNE,NNW and NE. Integrated with description of the karst feature of core,electronic probe
element analysis and isotope analysis,we found that there are four periods of karstification in this area,of which the periods
of Middle-Late Caledonian and early hercynian played an important role in controlling the formation of the karst cave. Karst
controlled the distribution of fracture-cave reservoir,and the ancestral water system located in different karst areas had impact
on the shape of cave-fracture body. Fracture and its accompanying crack not only increased the contact area but also improved
the solution range of the surface and ground water with the carbonate reservoir,which caused 90% wells with drilling empty
and mud loss distributed near the fault zone,where karst developed very well.

中图分类号: