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研究表明 ,在含油气岩系中 ,当有机质发生热演变而成熟、并逐渐向烃类转变的整个过程中 ,氮主要以NH+4的形式释放出来而进入孔隙流体与周围介质 (成岩矿物 )相互作用 ,最重要的机制是NH+4可取代粘土矿物 (如伊利石 ,I/S混层矿物等 )层间的K+而参与成岩作用 ,形成含铵矿物 ,这一过程中氮的地球化学性质发生了重要变化 ,含铵矿物中固定 -NH4的富集状况与有机质成熟度及烃类运移有关。通过研究成岩和油气生成、运移、聚集过程中氮的岩石地球化学行为及其控制因素 ,可将固定 -NH4作为有机质成熟度和油气运移路径的一种新的、有意义的示踪剂
The results show that in the petroleum-bearing rock series, when the organic matter undergoes thermal evolution and maturation and gradually shifts to hydrocarbon, nitrogen is mainly released as NH + 4 into the pore fluid and the surrounding medium (diagenetic minerals) The most important mechanism is that NH + 4 can take part in diagenesis by substituting K + between layers of clay minerals (such as illite, I / S mixed mineral, etc.) to form ammonium-containing minerals. In this process, the nitrogen geochemistry Nature has undergone important changes. The enrichment of fixed-NH 4 in ammonium-bearing minerals is related to organic matter maturity and hydrocarbon migration. By studying the geochemical behavior of nitrogen and its controlling factors during diagenesis, hydrocarbon generation, migration and accumulation, fixed -NH4 can be used as a new and meaningful tracer for organic matter maturity and hydrocarbon migration pathways