川东北须家河组储层特征及主控因素

勘探和研究证明，川东北地区须家河组具备良好的勘探潜力，特别是元坝地区中浅层已经成为该区天然气勘探的重要接替领域。川东北地区上三叠统须家河组成藏条件优越、气源充足，而储层发育是控制气藏分布的关键因素。通过对须家河组储层岩性特征、岩石结构特征、物性特征、孔隙类型和成岩作用特征及其相互关系的研究，指出沉积相是控制优质储层发育的关键因素，成岩作用和构造裂隙作用对储层发育有重要影响，元坝西北部须二段发育大型相控型孔隙砂岩储层，物性较好，是川东北中浅层将来增储的主要地区。

Reservoir Characteristics and Main Controlling Factors of the Xujiahe Formation in Northeastern Sichuan Basin

Exploration and research show that there has favorable exploration potential in Xujiahe Formation of northeastern Sichuan Basin, particularly in Yuanba shallow areas, and reservoir is the key factor for gas exploration. Reservoir is the key factor of gasfield distribution in Xujiahe formation of northeastern Sichuan Basin. Based on the study on petrologic, physical characteristics, pore types and diagenetic characteristics of the Xujiahe Formation sandstone reservoirs and their relationship, we conclude that sedimentary facies are the key factors to control the development of high quality reservoir. Diagenesis and tectonic fractures have an important impact on the development of sandstone reservoir, and the second stage of Xujiahe formation in the northeast of Yuanban area is the primary target for exploration where sandstone reservoir in the shallow of large-type of pores