麻黄山西区延长组长4+5至长6储层成岩作用及成岩演化史研究  

RESERVOIR DIAGENESIS AND DIAGENETIC EVOLUTION HISTORY OF 4^(th)+5^(th)-6^(th) MEMBERS IN YANCHANG FORMATION,WESTERN MAHUANGSHAN,ORDOS BASIN

作　　者：李顺利[1] 李胜利[1] 于兴河[1] 杜伟维[1] 

机构地区：[1]中国地质大学能源学院,北京100083

出　　处：《地质力学学报》2009年第4期374-384,共11页Journal of Geomechanics

基　　金：中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室开放基金项目(编号:EEL2008-6)资助

摘　　要：麻黄山西区长4+5至长6储层为一套三角洲前缘亚相的细砂岩,研究证明砂岩目前处于中成岩A期。机械压实与胶结作用是孔隙减少的主要作用,也是本区原生孔隙少、储集物性差的直接原因;而大气淡水的淋滤作用及有机酸溶蚀作用,尤其是有机酸溶蚀作用,是产生次生孔隙的主要作用,使局部储层物性有所改善,因此次生孔隙是本区油气的主要储集空间,下一步油气勘探开发应注重对有利次生孔隙空间的预测。The reservoirs of 4^th ＋ 5^th-6^th Members of Yanchang Formation in west Mahuangshan were fine sandstone of delta front. The diagenesis in this area had reached A-period of middle diagenetic stage. The mechanical compaction and cementation had resulted in the poor physical property of the reservoir and that was the reason of reservoir lacking primary pores. However, the eluviation by atmospheric water and corrosion by organic acid were helpful to the local reservoir with induced pore. The next step of petroleum exploration and development should be focused on the forecast of favorable areas with induced pore.

关 键 词：麻黄山西区 长4+5至长6段 成岩作用 成岩演化史 

分 类 号：TE122.2[石油与天然气工程—油气勘探]