摘要
油气储层的微观非均质性特征是储层地质学研究的重要内容之一。通过真实砂岩微观孔隙模型试验,并结合薄片鉴定、物性分析、扫描电镜等分析测试对孔隙结构进行深入分析,对鄂尔多斯盆地定边地区长8_2储层的微观非均质性进行研究。研究表明,研究区长8_2储层的微观非均质性很强;沉积微相和成岩作用是影响微观非均质性的根本原因;微观非均质性所导致的绕流是影响水驱油效果和剩余油分布的主要原因;研究区主要发育剩余粒间孔隙、溶蚀孔-剩余粒间孔隙和致密孔隙,建议相应地针对上述孔隙类型制定不同的注水开发方案。
The micro-anisotropy characteristics of the oil and gas reservoirs are one of the important contents in reservoir geology.The micro-anisotropy o f Chang 82 Reservoir in Dingbian Area in Ordos Basin is analyzed by real sandstone micropore model experiment and thin section observation,physical property and SEM.The results show that Chang 82 Reservoir has heavy micro-anisotropy,The sedimentary microfacies and diagenesis are the main factors affecting the micro- anisotropy.The flow around by micro-anisotropy is the inner reason affecting the oil displacement effect of waterflooding and remaining oil distribution.Based on a large sum of researches on the three main types of pore structures of Chang 82 Reservoir in the study area,it is better to make three types of water flooding development schemes according to the experimental results,the 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.
出处
《长江大学学报（自科版）（上旬）》
CAS
2012年第12期53-56,5,共4页
JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG
关键词
定边地区
长82储层
真实砂岩微观模型
微观非均质性
渗流特征
Dingbian Area
Chang 82 Reservoir
authentic sandstone micro-model
micro-anisotropy
percolation characteristics
