延长油田郑庄区长6油层组储层特征研究

STUDY ON THE CHARACTERISTICS OF CHANG 6 RESERVOIR GROUP ON ZHENGZHUANG BLOCK OF YANCHANG OIL FIELD

郑庄油区位于鄂尔多斯盆地伊陕斜坡东部,长6油层为本区的主要勘探开发目的层,根据钻井岩心资料分析发现,该储层的岩性以灰色细粒长石砂岩为主;填隙物以自生矿物为主,主要有绿泥石、方解石、石英及钠长石等;主要孔隙类型有粒间孔、粒间溶孔、粒内溶孔以及少量铸模孔、微裂隙等;属于低孔隙度、特低渗透率的致密砂岩储集层。

ZHENGZhuang block lies in the eastern Yi-Shan slope of the Ordos Basin.Chang 6 is the principal reservoir about exploration and development in the area.According to rock core analysis,it revealed that the reservoir rock is gray fine grain feldspathic sandstones mostly.Fillings is the authigenic minerals mainly,including chlorite,calcite,quartz and albite,etc.;the main pore types of sandstones are porosity between holes,intergranular dissolution pores,dissolution pores and a small amount of mold holes,micro-cracks,etc.;Chang 6 is a reservoir with low porosity,ultra-low permeability sandstone.