石油与天然气地质 ›› 2008, Vol. 29 ›› Issue (2): 159-166.doi: 10.11743/ogg20080202

• 论文 • 上一篇    下一篇

塔中4油田石炭系各油组油气性质差异及成因机制

姜振学1,2, 杨俊1,2, 庞雄奇1,2, 杨海军3, 李卓1,2   

  1. 1. 中国石油大学, 盆地与油藏研究中心, 北京, 102249;
    2. 中国石油大学, 油气资源与探测国家重点实验室, 北京, 02249;
    3. 中国石油天然气股份有限公司, 塔里木油田分公司, 勘探开发研究院, 新疆, 库尔勒, 841000
  • 收稿日期:2008-03-03 出版日期:2008-04-24 发布日期:2012-01-16
  • 基金项目:

    国家重点基础研究发展规划(973)项目(2006CB202308)

Property differences and genetic mechanisms of hydrocarbon in each oil unit of the Carboniferous in Tazhong-4 oilfield

Jiang Zhenxue1,2, Yang Jun1,2, Pang Xiongqi1,2, Yang Haijun3, Li Zhuo1,2   

  1. 1. Basin & Reservoir Research Center, China University of Petroleum, Beijing 102249, China;
    2. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;
    3. Research Institute of Exploration and Development, Tarim Oilfield Branch Company, CNPC, Korla, Xinjiang 841000, China
  • Received:2008-03-03 Online:2008-04-24 Published:2012-01-16

PDF (PC)

539

被引次数

17

摘要：

塔中4油田石炭系3个油组表现为上、下油,中间气的特征.塔中4石炭系油气藏以两期成藏为主,早期以油充注为主,晚期以天然气充注为主.通过分析不同时期泥岩抗张强度、流体剩余压力和断面正压力大小及其相互关系,结合油气充注时间认为:晚海西期沟通石炭系3个油组的断裂具有开启性,油气主要充注在CⅢ和CⅠ油组;喜马拉雅期CⅢ油组剩余压力大于断面正压力,使得后期充注的天然气主要充注到CⅡ油组,同时由于CⅡ油组上部泥岩厚度较大,调整到CⅡ油组的天然气不能突破断裂向上调整到CⅠ油组.在塔中4石炭系成藏过程分析的基础上,预测塔中中央断垒带西段是寻找CⅠ和CⅡ调整型油藏的有利区.

关键词: 断裂输导体系, 断层封闭性, 成因机制, 塔中4油田, 塔里木盆地

Abstract:

The three oil units of the Carboniferous in Tazhong-4 oilfield feature in a hydrocarbon distribution of gas-bearing formation being clipped between oil-bearing formations.The Carboniferous reservoirs in Tazhong-4 oilfield were formed mainly in two stages,the earlier oil-charging stage and the later gas-charging stage.By combining the oil and gas charging times with the analysis of mudstone compressive strength,fluid residual pressure and normal pressure on fault surface in different periods,and the relationship among these three parameters,it is suggested that the fault cutting through the three units were open in the late Hercynian,leading to accumulation of oil and gas in the Unit CⅢ and CⅠ;while in the Himalayan period,fluid residual pressure of Unit CⅢ was greater than the normal pressure on fault surface,resulting in late accumulation of gas in the Unit CⅡ rather than Unit CⅠ.Moreover,the gas charged in CⅡ unit could not migrate upward through the fault into Unit CⅠ due to the large thickness of the upper shale interval.The analysis of the whole process of the pooling in the Carbonife-rous reservoirs in Tazhong-4 oilfield indicates that the western section of the central fault-horst zone is favorable for finding secondary oil pools in Unit CⅠ and CⅡ.

Key words: fault transport system, fault sealing property, genetic mechanism, Tazhong-4 oilfield, Tarim Basin

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