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在塔中东部局部地区奥陶系碳酸盐岩储集层中发现一期(第Ⅲ期)发强棕红色荧光的烃包裹体,在荧光特征、组分特征上都有其独特性,预示塔中东部成藏的独特性。将这3期对区域成藏有意义的烃包裹体分期进行组分提取、组分分析、相图分析、温度压力分析,分析认为,第Ⅱ期形成于海西运动晚期源于中上奥陶统的正常油得以保存;第Ⅳ期形成于喜马拉雅运动晚期由寒武系原油分解的凝析油气大量充注,使整个塔中地区奥陶系的原油具有中上奥陶统源油和寒武系原油混源特征;第Ⅳ期凝析油气的大规模充注,是塔中地区油气藏普遍存在25-降藿烷系列的原因,也是塔中地区凝析油气藏的重要贡献者;第Ⅲ期形成于燕山-喜马拉雅运动早期源于寒武系高成熟油只在塔中东部地区的中下奥陶统及寒武系充注,这就是只在塔中地区东部发现油藏,而在其他地区主要为凝析油气藏的原因。
In the Ordovician carbonate reservoir in the eastern part of the central part of Tarim Basin, it is found that the first phase (Ⅲ) strong brownish red fluorescence hydrocarbon inclusions have their unique characteristics in fluorescence and composition, Uniqueness of accumulation in the middle of the tower. According to the three stages of hydrocarbon inclusions which have significant significance to regional accumulation, component extraction, component analysis, phase diagram analysis and temperature-pressure analysis show that the second phase formed in the Hercynian movement originated from Middle-Upper Ordovician Of the normal oil can be preserved; the fourth stage was formed in the Himalayan movement by the Cambrian oil decomposition of the condensate oil filled a large number of the entire Tazhong area of Ordovician oil with the upper Ordovician source oil and Cambrian oil mixed source Characteristics; the fourth phase of large-scale charge of condensate oil and gas reservoirs in Tazhong area are generally 25-norhopane series of reasons, but also an important contributor to the condensate reservoir in the Tazhong area; Ⅲ formed in the Yanshan The early Himalayan movement originated from the Middle-Lower Ordovician and Cambrian filling of the Cambrian-only high-mature oil in the eastern part of the Tazhong area, where the reservoir was found only in the eastern part of the Tazhong area and mainly in other areas Analysis of reservoir causes.