The origin, migration pathways, as well as the influence of secondary processes of oil and natural gas accumulated in lower Cretaceous to lower Miocene strata of the western part of the Polish Outer Carpathians (between Kraków and Pilzno towns) based on results of organic geochemical analyses are investigated in this paper. Oil and thermogenic hydrocarbon gases were generated mainly from type II kerogen, and type II and III kerogen mixed in various proportions. These kerogens mainly occur in the Oligocene Menilite beds of the Silesian and Dukla nappes. Oils were generated from early to late “oil window”. Secondary cracking was recorded in oils from Dukla nappe, other secondary processes including biodegradation, water washing and evaporative fractionation were also developed to a various extent in many oils. The most biodegraded oils occur in seep S-Li, and the most extensive water washing is observed in the oil from seep S-Sa/1. The evaporative fractionation processes most significantly occur in the selected deepest parts of the multi-horizontal Biecz field. Hydrocarbon gases originated during both microbial and thermogenic processes of organic matter transformation. Natural gas has not been subjected to biodegradation processes. Carbon dioxide is derived from both microbial and thermogenic decomposition processes of organic matter and was generated together with hydrocarbon gases.

根据有机地球化学分析的结果，在波兰外喀尔巴阡山脉西部（克拉科夫和皮尔兹诺镇之间）的下白垩统至下中新世地层中积累的石油，天然气的起源，迁移途径以及次级过程的影响本文进行了调查。石油和热成烃气体主要来自II型干酪根，II和III型干酪根以不同比例混合。这些干酪根主要存在于西里西亚和杜克拉推覆岩的渐新世青铜矿床中。从早期到晚期的“油窗”都产生了油。Dukla尿布的油中记录了二次裂解，在许多油中，包括生物降解，水洗和蒸发分馏在内的其他二次过程也得到了不同程度的发展。生物降解程度最高的油存在于渗S-Li中，并且在渗S-Sa / 1中发现了最广泛的水洗。蒸发分馏过程最明显地发生在多水平Biecz场的选定最深部分。碳氢化合物气体是在有机物转化的微生物和生热过程中产生的。天然气尚未经过生物降解过程。二氧化碳来自微生物和有机物的热分解过程，并与碳氢化合物气体一起产生。碳氢化合物气体是在有机物转化的微生物和生热过程中产生的。天然气尚未经过生物降解过程。二氧化碳来自微生物和有机物的热分解过程，并与碳氢化合物气体一起产生。碳氢化合物气体是在有机物转化的微生物和生热过程中产生的。天然气尚未经过生物降解过程。二氧化碳来自微生物和有机物的热分解过程，并与碳氢化合物气体一起产生。