摘要
利用岩心分析,测井、扫描电镜、铸体薄片和岩石薄片以及压汞等资料,对马岭地区长71油层的岩性、物性和孔喉特征等进行了研究。结果表明,研究区长71储集层多以岩屑长石砂岩和长石岩屑砂岩为主,属于低孔-特低孔、特低渗-超低渗储集层,储集空间以粒间孔和长石溶孔为主,储集层非均质性强。利用储集层物性和孔隙结构参数对长71储集层进行评价,研究区主要为Ⅲ类和Ⅳ类储集层,Ⅰ类储集层不发育,Ⅱ类储集层只在局部发育。
This paper presents in-depth studies of Chang-71 reservoir in Maling area of Ordos basin in petrology,physical property and pore throat characteristics by core sampling analysis,well logs,SEM,casting thin section and rock slice data as well as mercury injection test information.The results show that this reservoir is dominated by lithic feldspar sandstone and feldspar lithic sandstone,intergranular pore and feldspar dissolved pore,and characterized by low and ultra-low porosity,ultra-low permeability and strong heterogeneity.The comprehensive classification and evaluation suggest that the major reservoirs belong to Type-Ⅲ and Type-Ⅳ,Type-Ⅰ reservoir is undeveloped,and Type-Ⅱ ones are developed locally in this area.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2014年第5期531-535,共5页
Xinjiang Petroleum Geology
基金
国家科技重大专项(2011ZX05033-004)
