摘要
本文根据近300口井岩心分析,13口井168块薄片、铸体薄片、砂岩中粘土矿物X射线衍射、扫描电镜及阴极发光等分析,经综合研究认为,扶余、杨大城子油层砂岩主要经历了中成央阶段,其最大埋藏深度为1000～2300m,相应镜质体反射率力0.5～1.38％,估计成岩温度为90～120℃。砂岩成岩事件计有:碎屑伊利石转化、球粒状菱铁矿、铁白云石、机械压实、自生石英、蒙皂石、蒙皂石—伊利石、蒙皂石—绿泥石、长石溶解、高岭石、自生伊利石、自生长石、长石钠长石化、绿泥石、重晶石、浊沸石、无铁方解石和浊沸石溶解等。由于上述砂岩的成岩历史,决定了储集层质量具中等孔隙度(10～20％)与低渗透性(0.01×10~3～50×10^(-3)μm^2)的特点。次生孔隙发育段可改善储集层性质。
<ABSTRACT> Based on the comprehensive study of core analyses of about 300 wells, 168 thin sections, cast thin sections, X-ray diffraction of clay mineral in sandstones, SUM (Scanning electron microscope) and cathodic emission anal ysis, this paper show that Fuyu and Yangdachengzi sandstone reservoirs have undergone medium diagenetic stage, with maximum buried depth of 1000-2300m, vitrinite reflectance ( Po ) 0.5-38%,Estimating diagenetic temperature is 90-120. Diagenetic events of sandstones are.- clastic illite conversion, spherosiderite, an-kerite, mechanical compaction , authigenic quartz , smectite , smectite-illite , smectite-chlorite, feldspar solubilization, kadinite, authigenic illite, authigenic feldspar, feldspar albitization, chlorite, heavy spar, laumontite ironetic calcite and laumentite solubilization, etc. Diagenetic process of sandstones mentioned above determined the quality of reservoirs to be medium
porosity ( 1c-20% ) and low permeability (0.01-50×103
μm2 ) .Development interval of secondary pores could improve the quality of the reservoirs
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
1990年第4期13-22,共10页
Petroleum Geology & Oilfield Development in Daqing
关键词
油层
砂层
成岩
储层
性质
: sedimontary facies sandstone, dialgenesis, reservoir, research,secondary pore, Fuyu, Yangdachengzi resevoir, Songliao Basin
