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天然气地球科学

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苏里格气田西区苏48区块储层微观特征及其对储层的影响作用

郝骞，张吉，路中奇，万单夫，王龙   

  1. 中国石油长庆油田公司苏里格气田研究中心，陕西 西安 710018
  • 收稿日期:2012-03-16 修回日期:2012-07-16 出版日期:2012-12-10 发布日期:2012-12-10
  • 通讯作者: 郝骞haoq1_cq@petrochina.com.cn E-mail:haoq1_cq@petrochina.com.cn
  • 作者简介:郝骞(1982-)，男，甘肃庆阳人，工程师，博士，主要从事苏里格气田开发技术工作. E-mail:haoq1_cq@petrochina.com.cn.
  • 基金资助:

    国家科技重大专项(编号:2008ZX05044)资助.

Microscopic Characteristic and Its Influences on Reservoirs  from the Su 48 Block in the West Sulige Gas Field

HAO Qian,ZHANG Ji,LU Zhong-qi,WAN Dan-fu,WANG Long   

  1. Sulige Gas Field Research Center of Changqing Oilfield Company, Xi′an 710018, China
  • Received:2012-03-16 Revised:2012-07-16 Online:2012-12-10 Published:2012-12-10

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摘要：

根据鄂尔多斯盆地苏里格气田西区苏48区块盒8段—山1段储集砂岩的岩石薄片、铸体薄片、扫描电镜、X-射线衍射、高压压汞及核磁共振等测试分析数据，精细表征了盒8段—山1段储层微观特征。研究表明:砂岩类型以岩屑石英砂岩、石英砂岩为主，盒8段储层孔隙类型以粒间孔、岩屑溶孔和晶间孔为主，盒下8亚段孔喉半径较大，喉道发育程度较好，其有效孔隙个数和体积均高于其他储层。山1段孔隙类型主要有岩屑溶孔、晶间孔、凝灰质溶孔以及长石溶孔，山1段孔喉半径较小。盒8段—山1段喉道类型主要有管束状喉道、片状喉道和点状喉道，分选性均为中等—差，排驱压力相差不大。通过高压压汞和核磁共振提供的喉道半径以及可动流体饱和度的精细表征结果，将研究区储层划分为4类，明确储层差异的原因是受到碎屑成分、孔隙类型、结构及非均质性的共同影响。

关键词: 苏里格气田西区, 苏48区块, 盒8段—山1段, 储层微观特征, 影响作用

Abstract:

According to the analytical data of rock thin sections, casting thin sections, scanning electron microscope, X-ray diffraction, high-pressure mercury injection and nuclear magnetic resonance of reservoir sandstone from the He8-Shan1 members of the western Su 48 block in the Sulige gas field, Ordos basin.Reservoir microscopic characteristics of He8-Shan1 members have been finely characterized.Research shows that the sandstone is mainly dominated by lithic quartz-sandstone and quartz sandstone.The main pore types of He8 reservoir are intergranular pore, sedimentation rock fragment pore and intercrystalline pore, with large inscribed circle radii, more effective pores and pore volume.Main pore types in Shan1 are sedimentation rock fragment pore, intercrystalline pore, tuffaceous pore and feldspar solution pore, with smaller inscribed circle radii.The throat types of He8-Shan1 reservoir are bundled tubes throat, lamellar throat and punctual throat, with medium-poor sorting feature.Fine characterization results from throat radius and saturation of mobile fluid provided by high pressure Hg injection and MRI divide the study area into four types, and clearly show that the reservoir differences are caused by debris compositions, pore type, pore structure and heterogeneity.

Key words: West Sulige gasfield, Su 48 block, He8-Shan1, Reservoir micro characteristic, Influence

中图分类号: 

  • TE122.2

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