岩性油气藏 ›› 2016, Vol. 28 ›› Issue (1): 6–15.doi: 10.3969/j.issn.1673-8926.2016.01.002

• 论坛与综述 • 上一篇    下一篇

细粒沉积岩研究中几个值得关注的问题

周立宏1,蒲秀刚1,邓 远2,陈世悦2,鄢继华2,韩文中1   

  1.  1. 中国石油大港油田分公司 勘探开发研究院,天津 300280 ; 2. 中国石油大学(华东) 地球科学与技术学院,山东 青岛 266580
  • 出版日期:2016-01-20 发布日期:2016-01-20
  • 作者简介:周立宏( 1968- ),男,博士,教授级高级工程师,主要从事油气勘探与开发方面的研究与管理工作。 地址:( 300280 )天津市滨海新区大港油田幸福路 1278 号勘探开发研究院。 E-mail : zhoulh@petrochina.com.cn
  • 基金资助:

    中国石油天然气股份有限公司重大科技专项“大港油区大油气田勘探开发关键技术研究”(编号: 2014E-06 )资助

Several issues in studies on fine-grained sedimentary rocks

Zhou Lihong1, Pu Xiugang1, Deng Yuan2, Chen Shiyue2, Yan Jihua2, Han Wenzhong1   

  1.  1. Research Institute of Exploration and Development , PetroChina Dagang Oilfield Company , Tianjin 300280 , China ; 2. School of Geosciences , China University of Petroleum , Qingdao 266580 , Shandong , China
  • Online:2016-01-20 Published:2016-01-20

摘要:

细粒沉积岩中蕴含着丰富的油气资源,但其研究程度远低于粗碎屑岩,尤其在岩石分类、岩相划分 和脆性评价等方面的研究相对薄弱。 以 X 射线衍射数据为基础,以碳酸盐矿物、黏土矿物和长英质矿物 为三端元,将细粒沉积岩划分为 4 类 12 种岩石类型,再根据特殊矿物含量进行具体命名。 细粒沉积岩 岩相学侧重于研究不同岩相的物质组成、结构构造、储层物性、烃源岩特征及含油性等,以便优选优势岩 相,并寻找油气“甜点”。 脆性影响细粒沉积岩压裂改造的效果,目前常用岩石组分法和力学参数法对其 进行评价,二者在准确性、经济性及便捷性上各有优缺点,应尝试建立一种能够准确而合理地表征岩石 脆性的新方法。

关键词: 有效渗透率, 低渗透油藏, 等效渗流阻力, 水膜厚度, 有效孔喉半径, 珠江口盆地

Abstract:

 There are huge oil and gas resources in fine-grained sedimentary rocks. Researchers pay less attention to it compared to coarser sediments. Classification, lithofacies and brittleness evaluation of fine-grained sedimentary rocks remain a relatively weak research field. Based on the X-ray diffraction data, fine-grained sedimentary rocks were divided into 12 types of rock in four main categories by means of a three-unit division system. The three units are carbonate minerals, clay minerals and felsic minerals. Meanwhile, fine-grained sedimentary rocks were named according to the concrete content of special mineral. The study of lithofacies is mainly focused on the differences in components, texture, structure, reservoir physical properties, source rock character and oil-bearing property. A great emphasis should be placed on sedimentary environment, sedimentary progress and dynamical mechanism of different lithofacies to identify advantaged lithofacies for oil and gas exploration. Brittleness of fine-grained sedimentary rocks is of vital significance to the fracturing effect. Due to the demerits of elastic parameters method and mineral constituent method which are commonly used to evaluate the brittleness of fine-grained sedimentary rocks, a new accurate and rational method should be proposed.

Key words: effective permeability , low permeability reservoir , equivalent flow resistance , water film thickness , effective pore throat radius , Pearl River Mouth Basin

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