石油与天然气地质 ›› 2013, Vol. 34 ›› Issue (4): 475-482.doi: 10.11743/ogg20130408

• 层序与储层 • 上一篇    下一篇

中东鲁卜哈利盆地古生界致密砂岩储层特征及评价

郑磊1,2, 金之钧2, 张哨楠3   

  1. 1. 中国石油大学 地球科学学院, 北京 102249;
    2. 中国石化 石油勘探开发研究院, 北京 100083;
    3. 西南石油大学 资源与环境学院, 四川 成都 610500
  • 收稿日期:2013-05-17 修回日期:2013-07-18 出版日期:2013-08-28 发布日期:2013-08-27
  • 第一作者简介:郑磊,男,博士研究生、高级工程师,地球物理。E-mail:zhlei.syky@sinopec.com。

Features and evaluation of the Palaeozoic tight sandstone reservoirs of the Rub Al Khali Basin in the Middle East

Zheng Lei1,2, Jin Zhijun2, Zhang Shaonan3   

  1. 1. School of Geoscience, China University of Petroleum, Beijing 102249, China;
    2. Exploration & Production Research Institute, SINOPEC, Beijing 100083, China;
    3. School of Resources and Environment, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2013-05-17 Revised:2013-07-18 Online:2013-08-28 Published:2013-08-27

PDF (PC)

812

被引次数

24

摘要： 中东鲁卜哈利盆地古生界Unayzah组和Sarah组发育致密砂岩储层。薄片鉴定结果表明,其岩石类型以石英砂岩为主,少量的岩屑砂岩、岩屑长石砂岩、岩屑石英砂岩和长石石英砂岩,孔隙类型主要为残余粒间孔。胶结类型及发育程度与沉积环境密切相关。利用压汞法及电镜扫描结果测定了储层的孔隙结构。结果表明,岩石孔喉分布范围较大,小孔隙、细喉道的样品比例较高。根据毛细管压力曲线特征,大多数样品属于储集岩的范围。分别对每一组致密砂岩储层的岩石样品进行了孔隙度和渗透率的测试,结果表明Unayzah组和Sarah组储集性能较好。确定储层参数下限,提出了储层分类评价的标准,对储层进行综合评价。结果显示,Unayzah组纵向上Ⅰ类储层及Ⅱ类储层较为普遍发育,储集性能较好,属于中-好储层;Sarah组总体储集性能较Unayzah组差,以Ⅱ类和Ⅲ类储层居多,属于中-差储层。

关键词: 储层特征, 储层评价, 致密砂岩, 古生界, 鲁卜哈利盆地, 中东地区

Abstract: Tight sandstone reservoirs occur in the Palaeozoic Unayzah and Sarah Formations in Rub Al Khali Basin in the Middle East.Thin section analysis reveals that quartz sandstone is the main rock type,with some lithic sandstone,lithic arkose,lithic quartz sandstone and feldspathic quartz sandstone.The main pore type is residual intergranular pore.The cement types and their development degree are closely related with the depositional environment.Measurement of reservoir pore structure through mercury intrusion and SEM indicates that pore throat size distribution is large and the proportion of samples with small pores and narrow throats is large.The capillary pressure cures show that most samples have the poroperm characteristics of reservoir rocks.The testing data indicates that the Unayzah and Sarah formations have good re-servoir quality.On this basis,we determined the lower limits of the reservoir parameters and proposed the evaluation criteria for reservoir classification.The comprehensive evaluation indicates that the Unayzah Formation is moderate-good reservoir,with typeⅠand typeⅡ reservoirs widely developed vertically,whereas the Sarah Formation is moderate-poor reservoir,with typeⅡ and type Ⅲ reservoirs being predominate.

Key words: reservoir feature, reservoir evaluation, tight sandstone, Paleozoic, Rub Al Khali Basin, Middle East

中图分类号: