胜坨地区沙四上亚段砂砾岩类型及储层特征

综合地震、测井、录井、岩芯、薄片及粒度等资料，对东营凹陷胜坨地区沙四上亚段砂砾岩体的沉积特征、成因类型及储层特征进行了研究。胜坨地区沙四上亚段砂砾岩体具有较低的成分成熟度和结构成熟度，粒度概率累积曲线包括上拱形、低斜两段式和低斜多段式等类型，叠覆冲刷、滑塌变形、泥岩撕裂屑、重荷模与火焰构造等反映重力流沉积特征的沉积构造十分发育。砂砾岩体的主要类型包括靠近物源的近岸水下扇、远离物源的湖底扇以及断槽中发育的沟道浊积岩；储层以近岸水下扇和湖底扇的辫状水道砂体物性最好，储集空间以次生孔缝为主，孔隙结构主要表现为中孔中细喉型。

THE TYPES AND RESERVOIR CHARACTERISTICS OF GLUTENITE IN THE UPPER ES4 MEMBER OF SHENGTUO AREA

The sedimentary characteristics,genetic types and reservoir characteristics of glutenite in upper Es4 member of Shengtuo area in Dongying Depression have been studied based on the seismic data,well logging data,core data,thin section and grain size data.The compositional maturity and textural maturity of glutenite are relatively lower in this area.The types of granularity probability accumulation curve include upward shape,two low gradient sections shape and several low gradient sections shape and so on.And the sedimentary structures which can inflect the gravity flow such as slump structure,load cast and flame structure are very common in the glutenite of upper Es4 member in Shengtuo area.The main genetic types of glutenite include nearshore subaqueous fan,sublacustrine fan and channel turbidite.The physical properties of braided channel sandbodies of nearshore subaqueous fan and sublacustrine fan are the best.Their reservoir pore spaces are mainly the secondary pores and fractures,and the middle pore with middle-slender throat is the main pore structure type of glutenite.