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鄂尔多斯盆地合水地区长8储层微观非均质性的试验分析
陈杰1,周鼎武2
(1.中国石油大学 地球资源与信息学院,山东 东营 257061;2.山东科技大学 地质科学与工程学院,山东 青岛 266510)
摘要:
通过真实砂岩微观孔隙模型试验,对鄂尔多斯盆地合水地区长8储层的微观非均质性进行研究。结果表明:研究区长8储层的微观非均质性很强,且存在储层物性越好其微观非均质性越强的特点;沉积微相和溶蚀作用是影响微观非均质性的主要因素;微观非均质性是影响水驱油效果和剩余油分布的内因;在充分研究合水地区长8储层4种主要孔隙类型的基础上,建议相应地针对原生粒间孔隙和溶蚀孔隙型、微裂缝型、自生矿物晶间微孔隙型制定3类注水开发方案。
关键词:  鄂尔多斯盆地  合水地区  长8储层  微观非均质性  真实砂岩微观孔隙模型
DOI:10.3969/j.issn.1673-5005.2010.04.003
分类号::P 588.21
文献标识码:A
基金项目:
Experimental analysis on micro anisotropy of Chang 8 reservoir in Heshui area, Ordos Basin
CHEN Jie1, ZHOU Ding wu2
(1.College of Geo Resources and Information in China University of Petroleum, Dongying 257061, China;2.College of Geological Science and Engineering in Shandong University of Science and Technology, Qingdao 266510, China)
Abstract:
The micro anisotropy of Chang 8 reservoir in Heshui area in Ordos Basin was analyzed by real sandstone micro pore model experiment. The results show that Chang 8 reservoir has heavy micro anisotropy, and the better the quality of the reservoir is, the heavier the micro anisotropy is. The sedimentary microfacies and dissolution are the main factors affecting the micro anisotropy. The micro anisotropy is the inner reason affecting the oil displacement effect of waterflooding and remaining oil distribution. Based on a large sum of research on the four main types of pore structures of Chang 8 reservoir in study area, it is better to make three types of waterflooding development schemes according to the experimental results, the remaining primary pores between grains and the dissolved pores belong to the first one, the micro cracks belong to the second one, and the micro pores between subsequent mineral belong to the third one.
Key words:  Ordos Basin  Heshui area  Chang 8 reservoir  micro anisotropy  real sandstone micro pore model
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