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天然气地球科学

• 天然气地球化学 • 上一篇    下一篇

塔里木盆地塔深1井深层油气相态预测

张海坤，周世新，付德亮，巩书华，李 靖，王保忠，柳少鹏   

  1. 1．中国科学院地质与地球物理研究所油气资源研究重点实验室，甘肃 兰州 730000；
     2．中国科学院大学，北京 100049
  • 收稿日期:2013-05-08 修回日期:2013-06-13 出版日期:2013-10-10 发布日期:2013-10-10
  • 通讯作者: 张海坤zhanghk1987@163.com. E-mail:zhanghk1987@163.com.
  • 作者简介:张海坤(1987-)，男，河南周口人，硕士研究生， 主要从事油气地球化学研究. E-mail:zhanghk1987@163.com.
  • 基金资助:

    国家重点基础研究发展规划“973”项目(编号:2011CB201102)；国家自然科学基金项目(编号:41072105)；国家重大专项项目(编号:2011ZX05008-004-01)联合资助.

Petroleum Phase State Prediction in Deep Reservoir of Tashen-1 Well in Tarim Basin

ZHANG Hai-kun, ZHOU Shi-xin, FU De-liang, GONG Shu-hua, LI Jing, WANG Bao-zhong, LIU Shao-peng   

  1. 1.Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy 
    of Sciences, Lanzhou 730000, China; 2.University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-05-08 Revised:2013-06-13 Online:2013-10-10 Published:2013-10-10

PDF (PC)

663

摘要：

塔深1井是中国目前第一深井，其钻探深度为8 408m，在6 800～7 358m处的下奥陶统—上寒武统碳酸盐岩中见有气态烃存在，而在底部8 404～8 406m处寒武系岩心中见有褐黄色的液态烃，如何解释该井深层油气相态特征是人们非常关注的问题。通过使用经验判识法和PVT相图法对深层油气相态进行了研究,组分Z值法和三角图经验法研究表明，该井在6 800～7 358m处的下奥陶统—上寒武统烃类流体可能为带油环凝析气藏。另外对塔深1井8 406m处的烃类流体组成进行了恢复，并使用PVTsim相态模拟软件对深层油气的相态进行了模拟，研究表明塔深1井深层油气的临界温度为182℃，临界压力为52MPa，临界点温度位于临界凝析压力点与临界凝析温度点之间，且与临界凝析压力点非常接近，从深层流体组成、温度和压力条件分析，该井8 406m处深部流体具有典型挥发性轻质油的相态特征，并非岩心中见到的纯液态烃或气态烃。

关键词: 塔深1井, 油气相态, PVTsim, 深层油气

Abstract:

The Tashen-1 well with depth of 8 408m in Tarim Basin is the deepest well in China.Natural gas was found at 6 800-7 358m in the Upper Cambrian and Lower Ordovician in this well,but the yellow liquid hydrocarbon has been discovered in cores sampled from reservoir of 8 404-8 406m.How to explain this phase characteristics is a very interesting problem for us.In this paper,phase behavior has been studied by empirical method and PT phase diagram.Z value and ternary diagram show that fluid distributing at 6 800-7 358m in the Upper Cambrian and Lower Ordovician is gas reservoir with oil ring or gas condensate reservoir.Compositions of petroleum fluid in deep reservoir of Tashen-1 well have been recovered by integrating data of natural gas composition with chromatogram of saturated hydrocarbon.Simulating result from the phase modeling software PVTsim shows that critical point(182℃,52MPa) of petroleum in deep reservoir of Tashen 1 well is located between critical condensate pressure and critical condensate temperature on the envelope line,which indicates the phase state character of volatile light petroleum.These phase characteristics are different from our observed pure gas or liquid hydrocarbon on the surface of well.

Key words: Tashen-1 well, Petroleum phase, PVT-sim, Petroleum in deep basin

中图分类号: 

  • TE133+1
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