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塔里木中央隆起区中2井位于塔中南坡台缘带,上奥陶统凯迪阶良里塔格组频繁出现浅水粒屑滩沉积,以及由蓝藻、钙藻兼以少量珊瑚、苔藓虫等造礁生物以不等含量分别构成生物障积或粘结型礁灰岩,棘皮类、腕足类和三叶虫等壳相生物碎屑丰富。可分出数层典型的生物礁、滩组合序列,总体显示为原地生长和近源搬运的生物礁滩复合体建造。环境的动能条件略有变化,但皆属浪基面之上的沉积深度。礁、滩储层形成模式主要受于沉积相带、成岩改造的控制,储层以生屑灰岩、藻粘结灰岩、障积灰岩及砂屑灰岩为主,储集空间类型包括次生溶蚀孔隙、晶洞与裂缝,同时伴随少量的白云岩化作用,且孔隙以深埋藏溶蚀成因为主,次生胶结作用也十分强烈,礁相储层潜力好于滩相。
Middle Well 2 of the Tarim Central Uplift is located in the margin zone of the southern slope of the Tarim Basin. Shallow-water swarms are frequently deposited in the Lianglitage Formation in the Kaidi step of the Upper Ordovician, and reefs are formed by cyanobacteria, calcareous algae and a few corals and bryozoans The creatures, in varying degrees, constitute bio-barrier or cohesive reef limestone, and the echinoderms, brachiopods and trilobites are abundant in shell-phase biological debris. Several layers of typical reef and shoal assemblage sequences can be separated and generally shown as reef complex in situ growth and near-source transport. The kinetic energy conditions of the environment changed slightly, but all were sedimentary depth above the wave basal plane. Reef and beach reservoir formation patterns are mainly controlled by sedimentary facies and diagenesis. The reservoirs are dominated by bioclaved limestone, algal bound limestone, barrier limestone and sandy litter. The types of reservoir space include Secondary dissolution of pores, caves and fractures, accompanied by a small amount of dolomitization, and the pores mainly due to deep buried dissolution, secondary cementation is also very strong, reef reservoir potential is better than the beach facies.