摘要
Abstract
In the Pujiaogou area of Xiasiwan Oilfield,the geological structural characteristics and hydrocar-bon distribution patterns remain poorly understood,with unclear identification of favorable production zones.This situation has hindered reserve increment and production improvement,urgently necessitating a study on the reservoir characteristics of the Chang 6 to Chang 8 oil reservoirs in this region.Through statistical analy-sis of block-scale static data combined with cast thin-section observations,the results show that:The Chang 6-Chang 8 reservoirs are ultra-low permeability reservoirs,with the physical properties of the Chang 7 reservoir generally better than those of Chang 6 and Chang 8.The Chang 6 reservoir is mainly com-posed of TypeⅣb and V,the Chang 7 reservoir includes TypeⅢa,Ⅲb,andⅤ,and the Chang 8 reservoir is dominated by Type Ⅳb and Ⅴ.The main controlling factors affecting reservoir development in this area include compaction-pressure solution,carbonate cementation,chlorite cementation,and dissolution.The research results provide a favorable basis for the evaluation and comprehensive management of the Chang 6-Chang 8 reservoirs in the Pujiaogou area of Xiasiwan Oilfield,and hold certain significance for the oil-field's production capacity replacement and overall stable production planning.关键词
下寺湾油田/蒲家沟地区/储层特征/储层主控因素/油藏描述Key words
Xiasiwan Oilfield/Pujiagou area/reservoir characteristics/main controlling factors of reser-voir/reservoir description分类
天文与地球科学
