胜利油区深部砂岩储集层类型及特征

TYPES AND CHARACTERISTICS OF DEEP SANDSTONE RESERVOIRS IN SHENGLI PETROLEUM PROVINCE

胜利油区深层是油气勘探的重要领域 ,如何识别有利储集层是其关键。在进行了大量的分析化验基础上 ,研究了深部砂岩储集层的物性、孔隙类型和孔隙结构特征 ,划分出低渗型、致密型和中渗型 3种类型储集层 ,其中低渗型分布最广 ,中渗型油气勘探潜力巨大。深部砂岩储集层的孔隙类型主要为微孔隙和粒内孔隙 ,埋藏深度和岩性是影响其发育的主要因素 ,随着埋藏深度的增加 ,孔隙类型逐渐由粒间孔向微孔隙和粒内孔隙过渡 ,石英质砂岩和长石砂岩中粒间孔发育 ,岩屑砂岩中裂缝孔隙发育 。

The deep strata are the important targets of hydrocarbon exploration,and the key is how to correctly identify the profitable reservoirs in Shengli petroleum province.This paper,based on many more analytical data,describes the petrophysical properties,pore types and pore textures of deep reservoirs,and divides three types of reservoirs,such as low permeability,medium permeability,and tight reservoirs,of which the low permeability reservoirs are widely spread,and the medium permeability reservoirs are huge oil gas potential.The pore types of deep reservoirs are dominated by micropores and intragranular pores.With increasing buried depth,the pore types transform intergranular into micro and intragranular pores.The intergranular pores are mainly developed in quartz arenites and arkoses,fissures and fractures mainly exist in lithic arenites.The buried depth and lithology of deep reservoirs are the main factors to affect the evolution of pore types,as result in the differences of reservoirs properties in various regions.