综合分析钻井岩心、岩石薄片、测井资料以及各种化验分析资料,认为塔里木盆地塔中北坡中奥陶统一间房组深层碳酸盐岩储集层主要发育在台内滩相颗粒灰岩中,储层类型主要为裂缝型、裂缝-孔洞型和孔洞型.沉积微相、断裂和溶蚀作用是储层形成的主控因素.其中,台内高能滩的发育为后期选择性溶蚀奠定了物质基础,大气淡水溶蚀作用和埋藏期岩溶作用在一定程度上改善了储集性能,多期次活动的北东向断裂带是优质储层形成的关键.

Based on the analysis of core observation, rock thin sections, logging data and a variety of testing data of the Middle Ordovician Yijianfang Formation on the northern slope of middle Tarim Basin, reservoirs are mainly distributed in grain limestone of intra-platform shoals. The main reservoir types in this area are fractured reservoirs, fractured-vuggy reservoirs and pore-cave reservoirs. The controlling factors of reservoir genesis are sedimentary microfacies, faults and dissolution. The carbonate shoals provide the early material basis for the later selective dissolution. Meteoric-water dissolution and burial dissolution improved the properties of reservoir to some extent. The multi-period activities of the NE-trend faults played a key role in controlling the high quality reservoir.