泌阳凹陷安棚深层系主要指埋深大于 2 80 0m左右以核三下亚段为主的勘探目的层系 ,属扇三角洲沉积。砂岩储层的孔隙结构明显分为两大类 ,反映了以填隙物晶间孔隙为主的和以有效孔隙及裂缝为主的两种孔隙介质的孔隙结构特点。孔喉分布状况差 ,结构复杂 ,喉道微细且不均匀 ,致密低渗是该套储层突出特点。快速堆积 ,颗粒大小混杂 ,分选差 ,成分成熟度和结构成熟度低 ,是导致深层系砂岩低渗的主要原因 ;成岩作用 ,特别是压实作用和晚期碳酸盐胶结作用是影响储层微观非均质性和导致储层致密低渗的主要因素。综合研究可将砂岩储层划分为三类 ,其中Ⅰ、Ⅱ类为深层系有效油气储层 ,Ⅲ类储层为无效储层 ,但可作为有效储气层。根据孔隙度、声波时差随深度的变化关系及孔隙度、渗透率的平面展布特征 ,结合试油资料及微相平面展布 ,对深层系储层类型纵向和平面分布进行了综合评价泌阳凹陷安棚深层系主要指埋深大于 2 80 0m左右以核三下亚段为主的勘探目的层系 ,属扇三角洲沉积。砂岩储层的孔隙结构明显分为两大类 ,反映了以填隙物晶间孔隙为主的和以有效孔隙及裂缝为主的两种孔隙介质的孔隙结构特点。孔喉分布状况差 ,结构复杂 ,喉道微细且不均匀 ,致密低渗是该套储层突出特点。快速堆积 ,颗粒大小混杂 ,分选差 ,成? The Anpe deep layer in the Biyang depression mainly refers to the exploration target strata mainly composed of fan delta that have a buried depth greater than 2 80 0 m. The pore structures of sandstone reservoirs are obviously divided into two broad categories, which reflect the pore structure characteristics of two kinds of porous media mainly including interstitial interstitial pores and effective pores and fractures. Pore ​​and throat distribution is poor, the structure is complex, the throat is fine and inhomogeneous, and the tight and low permeability is the salient feature of the reservoir. Rapid accumulation, mixed particle size, poor sorting, low compositional maturity and low structural maturity are the main reasons leading to the low permeability of sandstone in the deep system. Diagenesis, especially compaction and late carbonate cementation, Micro-heterogeneity and the main factors leading to the formation of tight and low permeability reservoir. Sandstone reservoirs can be divided into three types according to the comprehensive study. Among them, Ⅰ and Ⅱ are effective oil and gas reservoirs in deep reservoirs, and Ⅲ reservoirs are invalid reservoirs, but can be used as effective reservoirs. According to the variation of porosity, acoustic time lag and depth, and the plane distribution of porosity and permeability, combined with the test oil data and the distribution of microfacies plane, the vertical and horizontal distribution of reservoir type in the deep strata are comprehensively evaluated. Biyang Depth of depression Anpe mainly refers to the buried depth of more than 2 80 0 m around the sub-three sub-sub-exploration-oriented stratigraphic system, is a fan delta deposition. The pore structures of sandstone reservoirs are obviously divided into two broad categories, which reflect the pore structure characteristics of two kinds of porous media mainly including interstitial interstitial pores and effective pores and fractures. Pore ​​and throat distribution is poor, the structure is complex, the throat is fine and inhomogeneous, and the tight and low permeability is the salient feature of the reservoir. Rapid accumulation, particle size mixed, poor sorting, into?