西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

中东叙利亚A 油田碳酸盐岩油藏低阻成因分析

夏冬冬1,司马立强2,张庆红1,庞雯1.   

  1. 1. 中国石化石油勘探开发研究院,北京海淀100083
    2. 西南石油大学地球科学与技术学院,四川成都610500
  • 出版日期:2014-10-01 发布日期:2014-10-01
  • 基金资助:

    国家科技重大专项(2011ZX05031–002)。

Genesis of Low Resistivity Limestone Reservoirs in Oilfield A of Syria

Xia Dongdong1, Sima Liqiang2, Zhang Qinghong1, Pang Wen1   

  1. 1. Exploration and Production Research Institute of SINOPEC,Haidian,Beijing 100083,China
    2. School of Geoscience and Technology,Southwset Petroleum University,Chengdu,Sichuan 610500,China
  • Online:2014-10-01 Published:2014-10-01

摘要:

中东叙利亚A 油田J 组是世界范围内罕见的低阻碳酸盐岩油藏,基质储层高孔低渗,油层电阻率仅有
0.5∼5.0 Ω·m,甚至小于水层电阻率。前人对该地区储层低阻成因的研究较少,为了正确评价油藏,开展了J 组油层低
阻成因机理和主控因素分析。研究发现,A 油田地质背景的特殊性是形成碳酸盐岩低阻油层岩石物理成因的基础,岩
石物理成因揭示了碳酸盐岩油层低阻的本质。低幅度构造、弱水动力沉积是形成低阻油层的地质背景,高束缚水饱和
度、高地层水矿化度、黏土附加导电作用以及导电矿物是形成低阻油层的内因。因此,J 组碳酸盐岩低阻油层的形成是
宏观地质背景和微观岩石物理特征共同作用的结果。

关键词: 碳酸盐岩, 低阻成因, 低幅度构造, 束缚水饱和度, 孔隙结构, 地层水矿化度

Abstract:

J Formation in Oilfield A of Syria is a rare low resistance limestone reservoir in the world,with high porosity,
low permeable matrix reservoir and with resistance of 0.5∼5.0 Ω·m lower than water layer. Because few studies have been
made on the causes for this low resistance reservoir before,to correctly evaluate the reservoir,this paper analyzes the forming
mechanism and dominating factors of low resistance carbonate oil formation. We found that the special geological background
is the basic of petrophysical origin in low-resistivity oil formation. The petrophysical origin uncovers the essence low-resistivity
in carbonate oil formation. Low amplitude structures and weak hydrodynamic sediment are the geological background of lowresistivity
oil formation. High irreducible water saturation,high formation water salinity,additive conductivity of clay minerals
and conductive mineral are the internal causes for low-resistivity oil formation. The formation of low-resistivity reservoirs in
carbonate rock is the result of macroscopic geological background and microscopic petrophysics characteristics.

Key words: limestone, origin of low resistance, low-relief structure, irreducible water saturation, pore structures, formation water salinity