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高成熟度演化地区的海相碳酸盐岩储层易受到油气演化的影响 ,油气的聚集在储层中都留下了踪迹 ,既有对储层储集性能的改善有利的一面 ,也有对储层形成伤害的一面。对和田河气田的碳酸盐岩储层薄片观察、凝析油气的地球化学分析和储层沥青分析表明 ,主要有 3期油气运移 ,分别为 :晚加里东期—早海西期、晚海西期和喜山期。前两期都是寒武系来源的油气 ,均被生物降解或散失 ,喜山期是天然气的关键聚集时期。第一期以油相运聚的油气被降解 ,形成的沥青对储层造成了伤害 ,第二期以气相运移的油气多散失 ,仅在储层中留下凝析油 ,第三期油相运移的石炭系来源的油受到后期转移上来的寒武系干气的气侵 ,产生沥青质沉淀 ,使得寒武系凝析油被封堵 ,储层产出的凝析油的地球化学特征更接近石炭系源岩。
Marine carbonate reservoirs in areas of high maturity evolution are susceptible to the evolution of oil and gas, and the accumulation of oil and gas has left traces in reservoirs, both on the favorable side of reservoir reservoir performance improvement, Layers form the harming side. Carbonate reservoir flake observation, geochemical analysis of condensate hydrocarbon and reservoir asphalt analysis of Hetianhe gas field show that there are mainly three phases of hydrocarbon migration, namely: Late Caledonian-Early Hercynian, late Hercynian and Himalayan period. The first two periods are all oil and gas from the Cambrian source, which are biodegraded or lost, and the Himalayan period is the key gathering period for natural gas. The first phase of oil and gas migration and accumulation of oil and gas are degraded, the formation of asphalt damage to the reservoir, the second phase of the vapor phase migration of more oil and gas loss, leaving only condensate in the reservoir, the third phase of oil Carboniferous-derived oil migrated lately by the Cambrian dry gas that had been transferred late, resulting in asphaltene precipitation that blocked the Cambrian condensate. The geochemistry of the condensate produced by the reservoir Features closer to the Carboniferous source rocks.