大情字井地区西部青山口组储层特征

储层特征是影响油气藏油、气、水渗流特征及油气采收率的主要因素之一。因此,进行储层特征研究,对储层进行综合评价,对于搞清油藏剩余油的分布、采取合理性措施、提高采收率显得十分必要。大情字井地区西部青山口组为低渗岩性油藏,综合运用铸体薄片、岩心砂岩薄片和压汞分析等资料,对储层物性、岩性、空间类型和孔隙结构等特征进行研究。结果表明,西部青山口组储层物性总体表现为低—中孔、特低渗—低渗储层,对青山口组砂岩评价分为4类,其中以Ⅲ和Ⅳ类储层为主。

Reservoir characteristics of the Qingshankou formation in the west of Daqingzijing area

Reservoir characteristics affect oil,gas and water percolation characteristics and recovery factor,therefore reservoir characterization and comprehensive evaluation are very necessary to understanding residual oil distribution,taking rational measures and improving recovery factor.The Qingshankou formation in the west of Daqingzijing area is a low permeability lithologic reservoir.The reservoir has been studied in regards of physical properties,lithology,reservoir space and pore structure using data of cast thin section,sandstone thin section and mercury intrusion analysis.The results indicate that the Qingshankou formation in the west of Daqingzijing area generally belongs to low-medium porosity,extra-low to low permeability reservoir.The sandstones in the Qingshankou formation are divided into four types with Type III and Type IV being dominant reservoirs.