酒东盆地营尔凹陷碎屑岩储层成岩作用特征研究

Diagenesis of Clastic Reservoirs in Ying’er Depression of Jiudong Basin

对酒东盆地营尔凹陷中生界碎屑岩储层的沉积和成岩特征的研究表明，该区沉积环境和成岩环境有一定的继承性，沉积环境在一定程度上控制成岩特征；成岩作用特征反映微咸水到半咸水的沉积环境。砂岩成岩作用明显受到泥岩成岩作用的影响，主要表现为泥岩中的粘土矿物的相互转化作用对砂岩胶结作用的控制及泥岩有机质的演化对砂岩孔隙发育的影响。粘土矿物组合及演化特征反映了该区中生界以碱性、偏碱性的成岩环境为主，局部出现酸性成岩环境。该区存在的两套烃源岩在成烃演化过程中形成的有机酸控制次生孔隙带的发育，在中生界形成两个次生孔隙发育带。

The diagenetic characteristics of the Mesozoic clastic reservoirs in Ying’er depression,Jiudong basin show that there is a successive relation between sedimentary and diagenetic environment,and the former controls the latter to some extents The diagenetic environment is mainly alkaline and secondly acidulous according to characters of assemblage and evolution in clay minerals whithin mudstone It is obvious that diagenesis in sandstone is affected by mudstone,which shows the influence of mutual substitution of different clay minerals in mudstones on cementation of sandstone and the effect of organic evolution in mudstone on formation of secondary pores in sandstone The organic acid formed during evolution in mudstone controls the formation and distribution of secondary pores zones in sandstone As a result,two secondary pores zones exist in Mesozoic erathem in the depression