地学前缘 ›› 2012, Vol. 19 ›› Issue (2): 133-140.

• 论文 • 上一篇    下一篇

苏里格气田低渗透储层微观孔隙结构特征及其分类评价方法

李海燕, 岳大力, 张秀娟   


  1. 1. 中国石油大学（北京） 地球科学学院, 北京 102249 2. 大庆钻井工程公司, 黑龙江 大庆 163412
  • 收稿日期:2011-12-20 修回日期:2012-02-10 出版日期:2012-03-25 发布日期:2012-03-25
  • 作者简介:李海燕(1973—)女，博士后，讲师，地质工程专业，主要从事油藏描述、咸水层碳封存研究。E-mail：lihaiyan3790@vip.sina.com
  • 基金资助:

    国家自然科学青年科学基金项目“复合曲流带储层内部构型与剩余油分布模式研究”（40902035）；国家重点基础研究发展计划“973”项目（2011CB70732）

Characteristics of pore structure and reservoir evaluation of low permeability reservoir in Sulige gas field.

 LI  Hai-Yan, YUE  Da-Li, ZHANG  Xiu-Juan   

  1. 1. Faculty of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China 2. Daqing Drilling Engineering Company, Daqing 163412, China
  • Received:2011-12-20 Revised:2012-02-10 Online:2012-03-25 Published:2012-03-25

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摘要：

以苏里格气田盒8段和山1段为例，开展了低渗透储集层微观孔隙结构特征的研究工作。以取心井压汞测试、扫描电镜、铸体薄片等分析化验资料为基础，通过分析储层的孔隙结构和孔隙类型，将储层微观孔隙结构分为4类，分析了各类微观孔隙结构的特征。沉积环境和成岩作用的双重影响使得盒8段和山1段的储层孔隙结构非常复杂，造成本区储层特低渗透率的主要成因机制为成岩期强烈的压实作用及各种自生矿物的充填和胶结作用。主要的储集空间为次生孔隙，孔喉组合主要为低孔小喉型。应用聚类分析和Bayes判别分析方法，选取7种宏观和微观非均质参数，在建立4类微观孔隙结构判别函数的基础上，对苏里格气田进行了微观孔隙结构识别，绘制了主力小层储层综合评价图。分析表明：Ⅰ类、Ⅱ类储层为研究区的优质储层，是今后低渗透盒8段和山1段的主要勘探开发目标。

关键词: 低渗透, 孔隙结构, 判别分析, 储层评价

Abstract:

Taking the Shan1 and He8 segments in Sulige gas field as an example, this study focused on the micro pore structures of low permeability reservoir. Based on the study of mercury injection test, scanning electron microscope, and casting slice of core wells, micro pore structure was classified into four types through analysis of reservoir pore types and structures. Characteristics of each micropore structure was analyzed in detail. Dual influence of sedimentary environment and diagenesis resulted in the complexity of the micro pore structures. It is indicated that the genetic mechanism of the low permeability in Sulige gas field is the strong compaction, filling and cementation of autogenetic minerals during diagenesis. Reservoir space was dominated by secondary pores, and the pore throat assemblage was mainly low poresmall throat. With the cluster and Bayes discriminant analyses, combined with seven macro and micro heterogeneity parameters, discriminant function of four pore structure types was established, pore structure types for Sulige gas field were recognized, and the universal evaluation maps of main mini layers were drawn. Further analysis indicates that type Ⅰ and type Ⅱ reservoirs are of highquality, and considered as the further targets for exploration and development of low permeability Shan1 and He8 segments.

 

Key words: low permeability, pore structure, discriminant analysis, reservoir evaluation

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