【作者】 国建英；

【导师】 邵龙义；

【作者基本信息】 中国矿业大学（北京） ， 矿产普查与勘探， 2009， 博士

【摘要】 论文综合运用石油地质学和地球化学的理论与方法,对孔南地区中新生代烃源岩生烃机制和资源评价进行了研究。通过研究区烃源岩综合评价和油源对比,确认孔二段暗色泥岩和页岩是孔南地区的主力烃源岩。生排烃模拟实验揭示孔二段页岩和泥岩生排烃效率不同,低成熟页岩(Ro<1.0%)排油效率低于泥岩,成熟页岩(Ro>1.0%)与泥岩排油效率相当,均在90%以上。根据孔南地区咸化-半咸化湖相烃源岩生烃机制的研究,划分了早期未熟-低熟油低温生烃和中晚期干酪根热降解生烃两个生烃演化阶段,指出页岩早期生烃能力强而排烃能力较弱,但页岩、泥岩均具有生成未熟-低熟油的潜力。重新评价了孔南地区资源潜力,指出该区具有未熟-低熟油的资源潜力,大幅度提高了研究区资源量,指出孔南潜山构造带、沧市鼻状构造带和小集-乌马营为今后主要勘探方向。更多还原

【Abstract】 On the basis of theory and methods of petroleum geology and geochemistry, this paper analyzes the mechanisms and resources of Mesozoic and Cenozoic source rocks in the area of Kongnan. Dark mudstones and shales of Ek2 are recognized as the main source rocks by means of comprehensive source-rock evaluation and oil-source correlation. It is indicated from simulation experiment of oil generation and expulsion that Ek2 shales and mudstones are different in oil generation and expulsion efficiency. Comparing with the mudstones, the shales are lower at low mature stage (Ro<1.0%), but equivalently more than 90%at mature stage (Ro>1.0%). Based on hydrocarbon generation mechanism study of saline or semi-saline lacustrine source rocks, two stages of hydrocarbon generation is classified, and one is immature-lower mature oil generation stage, and the other is thermal kerogen degradation stage. It is indicated that the shales are strong in hydrocarbon generation but weaker in expulsion at the early stage. Both shales and mudstones, however, are potential in immature-lower mature oil. This paper re-evaluates the resource potential of Kongnan area and shows that it has the resource potential of immature oil. Thus, the resource of the target area is substantially increased. In the end, this paper takes Kongnan buried hill tectonic belt, Cangshi nose like structure and Xiaoji-Wumaying tectonic belt as future exploration targets.更多还原