摘要
孔隙结构研究是储层综合评价的重要内容之一,采用铸体薄片、扫描电镜、铸体图像分析、高压压汞等测试技术手段,对鄂尔多斯盆地上里塬地区长8储层的孔隙结构进行分析研究。鄂尔多斯盆地上里塬地区长8储层具有低孔低渗的特征,储层以剩余粒间孔为主,长石、岩屑及早期碳酸盐胶结物的溶解是形成次生孔隙的主要原因。细喉则是长8储层的基本渗流通道。铸体薄片、孔喉图像分析表明,上里塬地区长8储层具有复杂的孔喉分布特征,不同微相孔喉分布及孔隙结构特征是造成油井产能差异的重要因素。
The pore structure study is an important content of the comprehensive evaluation of the reservoir . The microscopic pore structure of chang8 reservoir in Shangliyuan area was thoroughly analyzed and investigated by using of many technical means such as cast thin section,scanning electorn microscope, cast image analysis, high-pressure mercury injection, etc. The chang8 reservoir is characterized by low pore and low permeability. The main pore type of the reservoir is primary remained intergranular pore,the dissolution of the feldspar, the debris and early carbonate cement results in the secondary pore. The fine throat is the basic seepage passage. The image of pore and the cast thin section shows that the reservoir chang8 has complicated pore-throat distributed character. Various pore-throat distributions of microfacies and various pore structure characters are important factors that lead to difference of oil-well productivity,
出处
《内蒙古石油化工》
CAS
2008年第5期162-164,共3页
Inner Mongolia Petrochemical Industry
关键词
鄂尔多斯盆地
孔隙
孔隙结构
储层
微观结构
Ordos basin
pore
pore structure
reservoir
microcosmic structure
