油气地质

东—韩地区延长组长2 油层组储层孔隙结构特征

  • 姚姚 ,
  • 唐文榜 ,
  • 奚先 ,
  • 王晓梅
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  • 1.西北大学地质学系; 2.陕西延长石油(集团)有限责任公司研究院;3.中国石化江汉油田分公司清河采油厂
李彦婧,1987 年生,女,西北大学在读硕士研究生,研究方向为油气地质。地址:(710069)陕西省西安市西北大学138 号信箱。 电话:(029)88303681。E-mail:youxi_2002@sina.com

网络出版日期: 2012-02-20

基金资助

“十一五”国家科技支撑计划项目“低(超低)渗透油藏精细描述关键技术与剩余油分布预测模型研究”(编号:2007BAB17B01)资助

Characteristics of pore structure of Chang 2 oil reservoir set of Yanchang Formation in Dong-Han area

  • YAO Yao ,
  • TANG Wenbang ,
  • XI Xian ,
  • WANG Xiaomei
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  • 1. Department of Geology, Northwest University, Xi’an 710069, China; 2. Research Institute of Yanchang Petroleum(Group)Company Ltd., Xi’an 710069, China; 3. Qinghe Oil Production Plant, Jianghan Oilfield Company, Sinopec, Shouguang 262714, China

Online published: 2012-02-20

摘要

采用物性分析、薄片观察、扫描电镜、常规压汞等方法,对低渗透储层特征及孔隙结构进行了研 究,并探讨了孔隙结构对低渗透储层物性的影响。结果表明:储层孔隙类型有残余粒间孔隙、溶蚀孔隙、晶 间孔隙、微裂缝,以溶蚀孔隙为主要类型;喉道类型以细喉道为主;孔隙结构以中孔-细喉道型为主,其次 是小孔-细喉道型、大孔-中粗喉道型;孔喉半径越大,低渗透储层的渗透性越好;分选系数和歪度系数反 映了低渗透储层喉道大小不均一、类型多样及储层微观非均质性强的特点。

本文引用格式

姚姚 , 唐文榜 , 奚先 , 王晓梅 . 东—韩地区延长组长2 油层组储层孔隙结构特征[J]. 岩性油气藏, 2012 , 24(1) : 52 -56 . DOI: 10.3969/j.issn.1673-8926.2012.01.010

Abstract

The property analysis, thin sections, scanning electronic microscope and mercury injection tests were applied to study the characteristics of low permeability reservoir and pore structure and discuss the effect of pore structure on physical properties of low permeability reservoir. The result shows that the pore types include residual
intergranular pores, dissolved pores,intercrystalline pore and micro-fracture,dominated by dissolved pores. Fine throat is the main throat type. Pore throat structure is mainly of middle pore-thin throat,followed by eyelet-thin throat and macropore-medium throat. The greater the pore throat radius is, the better the permeability of low permeability reservoirs is. Sorting coefficient and skewness show the characteristics of low permeability reservoirs such as various types of throat, different sizes and strong microscopic heterogeneity.

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