老爷庙地区东营组储层特征及有利含油相带预测

PREDICTION OF OIL-BEARING FACIES BELTS AND RESERVOIR CHARACTERISTICS OF DONGYING FORMATION IN LAOYEMIAO REGION

老爷庙地区东营组主要发育有扇三角洲、湖泊三角洲、近岸水下扇、水下重力流和湖泊等沉积体系。油气主要分布于 (扇 )三角洲前缘和 (扇 )三角洲平原的前端 ,其中尤以三角洲前缘的水下分流河道、河口砂坝的储集物性最好 ,对油气聚集非常有利 ,是主要的储集砂体。储层以粒间溶蚀孔为主 ,且随层位的加深孔径减小 ,为中低孔、中低渗型储层 ,储层物性受沉积相带影响 ,它们对油气的聚集有重要的控制作用。庙北地区Ed3 凝析油气藏的勘探应予以重视 ,庙南地区Ed1可能成为下步勘探的主要目标区 ,庙南地区Ed3

The Dongying Formation in Laoyemiao region consists of fan delta,lake delta,neritic subaqueous fan and subaqueous gravity flow and lake depositional systems.Oil and gas are mainly distributed in the frontal zones of fan delta and fan detaic plain.The subaqueous distributary river channels and river mouth sand bars in deltaic frontal zone are the main reservoir sandbodies.The intergranular soluted pores are the main preserving spaces of the reservoirs which decreased with the increase of buried depth,the porosity and permeability are of low mid type.Hydrocarbon accumulation is controlled by sedimentary facies zone.It is pointed out that the exploration of Ed 3 condensed oil and gas pools in north Laoyemiao region should be taken into account,and that Ed 1 and Ed 3 of the southern part of Laoyemiao region would be the main targets for exploration in future.