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油气在地下运移过程中,将不可避免的与围岩发生各种物理化学反应,导致沿运移的方向上油气物理化学性质和储层某些性质规律性的变化,因此研究中可以利用这些变化对油气运移方向与路径进行分析。综合利用原油饱和烃和芳烃中Ts/Tm、C29甾烷ααα20S/20(S+R)、C29甾烷ββ/(αα+ββ)、MPI、1-/4-甲基-二苯并噻吩等参数,对镇北油田镇28井区长3油组原油的饱和烃、芳烃生物标志研究表明,其生烃母质主要以陆源有机质为主,为来源于弱还原湖相沉积环境的成熟原油。原油族群研究表明,镇北油田镇28井区长3油组原油属于同一石油族群;通过原油饱和烃和芳烃原油运移指标分析表明,原油的运移方向为自东北向西南方向。
During the underground migration of oil and gas, various physico-chemical reactions with the surrounding rock will inevitably occur, resulting in the changes of the physicochemical properties of oil and gas and the regularity of some properties of reservoirs in the direction of migration. Therefore, in the research, these Variations analyze the direction and path of hydrocarbon migration. The comprehensive utilization of Ts / Tm, C29 sterane ααα20S / 20 (S + R), C29 sterane ββ (αα + ββ), MPI, 1- / 4-methyl-dibenzothiophene and the like in saturated and aromatic hydrocarbons The study on the biomarkers of saturated hydrocarbons and aromatics in Chang 3 oil group crude oil in Zhen 28 wellblock of Zhenbei Oilfield shows that the hydrocarbon-generating parent material mainly consists of terrigenous organic matter and is mature crude oil derived from weakly reduced lacustrine depositional environment. The study of crude oil group shows that the oil of Chang 3 oil group belongs to the same petroleum group in Well Zhen 28 of Zhenbei Oilfield. The analysis of transport index of crude oil saturated hydrocarbon and aromatic crude oil shows that the migration direction of crude oil is from northeast to southwest.