黄骅坳陷孔南地区下石盒子组砂岩储层特征及控制因素

黄骅坳陷孔南地区下石盒子组砂岩储层是有望实现黄骅坳陷古生界找油突破的有利地区.依据砂岩薄片与铸体薄片观察、X衍射、镜质体反射率及毛细管压力分析等实验方法,对研究区下石盒子组砂岩储层的岩石学特征、物性特征、孔隙结构特征进行了研究,并对各影响因素进行了评价.研究表明,研究区下石盒子组砂岩储层为低孔低渗储层,渗透率与孔隙度呈...

Characteristics and controlling factors of Lower Shihezi sandstone reservoir in Kongnan Area of Huanghua Depression

The Lower Shihezi sandstone reservoirs are favorable areas in which the Paleozoic oil can be found in Kongnan Area of Huanghua Depression.According to the laboratory data of thin-section,cast thin-section,X-ray diffraction,vitrinite reflectance and capillary pressure,this paper analyzed the lithologic features,physical property and pore structure,and evaluated the influence factors.Study shows that the Lower Shihezi sandstone reservoirs in study area are low permeability and porosity reservoirs.The permeability and porosity have a good relation,and the connectivity of reservoir pore is good,belonging to pore-type reservoir.In the period of late diagenesis,the cuttings,interstitial content,feldspar particles and kaolinite experienced dissolution,forming a lot of secondary pores,which greatly improved the reservoir physical property.The sedimentary facies,cementation and dissolution were the main factors of controlling reservoir development.