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塔里木盆地塔中16-44井区在晚奥陶世良里塔格组沉积时期处于碳酸盐台地的边缘,发育粒屑滩、礁丘、灰泥丘及滩间海等亚相,不同沉积微相组合的礁滩复合体为重要的沉积体类型。研究表明,区内礁沿台缘成群、成带分布,中低能砂屑滩位于礁主体的内侧;礁和与之呈伴生的生屑滩、生物砂砾屑滩为本区优质的储集岩相,而礁后单独发育的中低能砂屑滩则不易形成优质的储集层。礁及与之相伴生的生屑滩、生物砂砾屑滩是油气勘探的重要目标。
16-44 well of Tazhong in Tarim Basin was located at the margin of carbonate platform during the Late Ordovician Lianglitage Formation and developed subfacies of debris beach, reef mound, stucco mound and intertidal sea. Different sedimentary micro-structures The combined reef-beach complex is an important type of sediment. The results show that the inland reefs are clustered and distributed along the platform margin, and the middle and low-energy sand litter beaches are located on the inner side of the reef body. The reefs and associated bifearites and bio-gravelly boulders are the high-quality reservoir rocks However, the low- and medium-energy sand littorals developed independently after reef are not easy to form high-quality reservoirs. Reefs and its associated brooms and biogenic gravelly debris beaches are important targets for oil and gas exploration.