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储层中的流体包裹体记录了油气水充注储层时的组成、性质及物理化学条件,在确定油气成藏期次方面得到了较好的应用。对埕北断阶区16口井的流体包裹体特征和均一温度进行了分析,埕北断阶区储层流体包裹体分为盐水包裹体和有机包裹体。根据包裹体的均一温度、地层埋藏史和热史确定该区有2期油气充注,对应的地质时期分别为东营组沉积末期和明化镇组沉积末期至今。结合圈闭发育史和烃源岩生排烃史等分析,认为该区发生2次油气运聚成藏,其中明化镇组沉积末期至今为主要油气成藏期。
Fluid inclusions in reservoirs record the composition, properties and physico-chemical conditions of oil-gas waterflooding reservoirs, and are well applied in determining the hydrocarbon accumulation period. The fluid inclusions and homogenization temperatures of 16 wells in the Tiebei fault region were analyzed. The fluid inclusions in the reservoir in the Tiebei fault zone were divided into salt fluid inclusions and organic inclusions. Based on the homogenization temperature of the inclusions, the burial history and thermal history of the strata, it is confirmed that there are two periods of hydrocarbon filling in the area, corresponding to the sedimentary period of the Dongying Formation and the Minghuazhen Formation, respectively. Based on the analysis of the history of the traps and the hydrocarbon generation and expulsion history of hydrocarbon source rocks, it is considered that there are two hydrocarbon migration and accumulation processes in this area, and the sedimentary period of the Minghuazhen Formation is the major hydrocarbon accumulation so far.