二连盆地阿拉达布斯凹陷南洼槽阿尔善组储层特征研究

Research on Reservoir Characteristics of Aershan Formation of Aladabusi South Sag in Erlian Basin

根据岩心、测井、铸体薄片、扫描电镜等多种分析测试资料,对阿尔善组储层岩石学、储集物性及特征进行系统综合研究[1-4]。结果表明:阿尔善组储层岩性主要为岩屑砂岩,其次为岩屑长石砂岩、长石岩屑砂岩,具有成份成熟度、结构成熟度较低的特点,主要是碎屑岩母岩近物源、搬运距离短以及频繁的火山活动综合作用的结果[5];填隙物主要为泥质粘土、胶结物。储层特征主要受沉积作用、成岩作用、构造作用的综合影响[6]。

According to the cores,logging,casting thin sections,scanning electron microscopy analysis of the test data,etc. This paper carries out a comprehensive research on the reservoir petrologic,reservoir physical properties and characteristic of Aershan formation[1- 4]. The results showed that： The reservoir is mainly composed of litharenite,followed by lithic feldspar sandstones and feldspathic litharenite sandstones. It has the characteristics of low composition maturity and structure maturity.mother rocks near provenance,short transportation distance and the combination of frequent volcanic activity caused the result.The filler of reservoir is content mainly argillaceous clay and cement. The reservoir characteristics mainly affected by sedimentation,diagenesis and tectonism.