石油学报 ›› 2007, Vol. 28 ›› Issue (4): 57-61.DOI: 10.7623/syxb200704011

• 地质勘探 • 上一篇    下一篇

低渗透储层成因机理及优质储层形成与分布

杨晓萍, 赵文智, 邹才能, 陈孟晋, 郭彦如   

  1. 中国石油勘探开发研究院 北京100083
  • 收稿日期:2006-06-08 修回日期:2007-02-28 出版日期:2007-07-25 发布日期:2010-05-21
  • 作者简介:杨晓萍,女,1961年11月生,2000年获中国石油勘探开发研究院博士学位,现为该院高级工程师,主要从事沉积储层方面的研究工作.E-mail:yangxp31@yahoo.com.cn
  • 基金资助:
    国家重点基础研究发展规划(973)项目(2001CB209100)资助

Origin of low-permeability reservoir and distribution of favorable reservoir

Yang Xiaoping, Zhao Wenzhi, Zou Caineng, Chen Mengjin, Guo Yanru   

  1. Research Institute of Petroleum Exploration and Development, Petro China, Beijing 100083, China
  • Received:2006-06-08 Revised:2007-02-28 Online:2007-07-25 Published:2010-05-21

摘要: 对几个典型的岩性油气藏中低孔隙度低渗透率储层的形成原因,及优质储层的形成与分布规律研究发现,沉积作用是形成低渗透储层的最基本因素,它决定了后期成岩作用的类型和强度,成岩早期强烈的压实作用和胶结作用对形成低孔隙度、低渗透率储层起了决定性作用;优质储层的形成与分布主要受层序界面、有利沉积相带、有机酸性水的溶蚀作用等因素的控制。一般来说,优质储层纵向上主要分布在三级层序的中下部、平面上主要分布在三角洲平原或前缘多期分流河道叠置的部位。它们在有机酸性水形成时期保留了较多的原生孔隙,酸性水容易进入孔隙及溶解其中易溶的碎屑颗粒和胶结物,并产生大量次生溶蚀孔隙,从而形成优质储层。

关键词: 岩性油气藏, 低渗透储层, 沉积微相, 成岩作用, 层序地层, 优质储层, 分布规律

Abstract: The low-permeability reservoirs are dominated in the lithostratigraphic oil-gas pools.The origin of low-permeability reservoir and distribution of favorable reservoir in several typical lithostratigraphic oil-gas pools were studied.It is found that sedimentation is a basic factor for generating low-permeability reservoirs,and the strong compaction and cementation are the key factors for forming low-porosity and low-permeability reservoirs.The formation and distribution of the favorable reservoirs were controlled by sequence boundary,favorable facies and dissolution of organic acid water.Generally,favorable reservoirs were vertically distributed in the lower and middle parts of Ⅲ-order sequence and laterally distributed in the stacked channels of delta plain or delta front. These places kept more primary porosity during generation of organic acid water which was easy removing into primary porosity and dissolving lots of cement and feldspar to form the secondary porosity.Then the favorable reservoirs can be generated.

Key words: lithostratigraphic oil-gas pool low-permeability reservoir, sedimentary micro-facies, diagenesis, sequence stratigraphy, favorable reservoir, distribution law

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