伊通盆地莫里青断陷伊59 井区双二段储层含油性研究

双二段储层是莫里青断陷伊59 井区勘探与开发的重要层位。本文在沉积相研究的基础上，通过岩心观察、薄片鉴定、物性分析以及试油研究等工作，对其储层岩石学特征、物性特征及含油性进行了综合研究。揭示出伊59 井区双二段储层的含油性特征及油水分布规律: 其含油储层的岩性以粉砂岩、细砂岩和砂砾岩为主，含油级别为荧光级以上; 储层孔隙度下限为8%，渗透率下限为0. 1 × 10 － 3 μm2，含油饱和度下限为35%; 油层深侧向电阻率＞ 30 Ω·m，声波时差为230. 0 ～ 260. 0 μs /m。油气高产井主要分布于靠近井区西北缘的湖底扇上中扇区，而湖底扇下中扇区产能较低; 西北缘逆断层的断裂带内及其东侧单斜构造的高部位产能较高。

Oil-bearing feature of the Member Shuang 2 reservoir of the Y59 area in Moliqing fault depression, Yitong Basin

The Member Shuang 2 Reservoir is an important hydrocarbon exploration and development layer of the Y59 area in the Moliqing fault depression． Based on the study of sedimentary facies，characteristics of reservoir petrology，physical properties and oil-bearing，it is revealed the characteristics of oil-bearing feature and the oilwater distribution law of the Y59 area． The lithology of the oil reservoir is dominated by siltstone and fine sandstone and sandy conglomerate． The oil bearing grade is fluorescence above． The reservoir porosity cutoffs for 8%，the lower limit of permeability is 0. 1 × 10 － 3μm2，and the oil saturation is greater than 50%． The Rlld of oil reservoir is over 30 Ω·m，and the AC is between 230. 0 ～ 260. 0 μs /m． High productivity wells are mainly located in the upper middle-fan near the northwestern margin，while the productiion is poor in the lower middle-fan． It has higher productivity in the fault terrace among the reverse faults of the northwestern margin than other regions．