【作者】 汪巍；

【导师】 沈忠民；

【作者基本信息】 成都理工大学 ， 矿产普查与勘探， 2006， 硕士

【摘要】 孔店组是渤海湾盆地的一个重要的产油层系，烃源岩主要分布在黄骅坳陷沧东一南皮洼陷和昌潍坳陷潍北地区。最近在东营地区相继发现了相当数量的油气含量。由于其烃源岩及原油的认识还未进一步系统化，且其油源问题尚存在较大的分歧。本文在前人研究的基础上对孔店组的烃源岩作了进一步的研究。 运用有机地球化学、石油地质学理论，发现东营凹陷孔店组暗色泥岩有机碳含量偏低的主要原因是成熟度较高；根据干酪根的镜检类型、元素组成、热解参数、抽提物族组成和饱和烃色谱特征对烃源岩有机质类型进行综合评价，有机质类型以Ⅱ₂和Ⅱ₁型为主。东营凹陷孔店组原油成熟度较高，而潍北凹陷孔店组原油与东营凹陷的相比，姥鲛烷具有显著的优势，γ蜡烷／C₃₀藿烷相对较低。 通过油源对比发现东营凹陷孔店组原油可能源于孔店组烃源岩，也可能有沙四段烃源岩的贡献。而潍北凹陷各地区所产原油均来自本地区孔二段烃源岩，属于近源油藏，既未经过远距离的垂向运移也未经过远距离的横向运移，是比较典型的自生自储类型油藏。 运用烃源岩生烃演化史研究结合翁地模拟技术，发现东营凹陷和潍北凹陷孔店组烃源岩的主要生、排烃期在沙四段沉积末期到东营组沉积末期之间。 东营凹陷孔店组烃源岩的沉积环境条件、有机母质来源与维北盆地基本相似，具有一定的生烃能力，可为工业性油藏的形成提供油源。根据现有探井资料分析，推测具有较好生烃能力的烃源岩可能分布在凹陷中心地带，因此，建议东营凹陷孔店组的油气勘探以靠近凹陷、斜坡附近的圈闭作为优选目标为佳。更多还原

【Abstract】 Kongdian Formation is an important oil accumulation layer in which the source rocks are mainly distributed in Changdong-nanpi Sag of Huanghua depression and Weibei area of Changwei Depression. Recently, amount of oil was discovered in Dongying Depression gradually. But the cognition of Source rocks and crud oil has not been systemized and the source of oil has a degree of bifurcation. The dissertation was carried out the further study.It is founded that the low organic carbon of grey mud rocks is mainly caused by the high maturity and the macerals is mainly consisted of saprogenite and vitrinite, meanwhile Weipei basin has a degree of similarity only displays some higher chitinite in difference . According to the kerogen style、 element composition、 pyrogenation parameter、 extract group composition and saturation chromatogram, we can find the style of organic is mainly consisted of II₂ and II₁.The maturity are rather high, while compared with the Dongying Depression, the crude oil of Weibei Depression has an obvious superiority of pristine and a rather low ratio of γ -waxane/C3o hopanes.Through the oil correction it is founded that the oil of Kongdian Formation in Dongying Depression may be originated either from source rocks of Kongdian or from that of Member Four of Shahejie Formation. While all of crude oil in Weibei Depression are from Source rocks of member Two segment of Kondian Formation, that is to say, the oil belongs to the near-headstream reservoir which don’t move long way vertically and transversely.Through the study of hydrocarbon-generation evolvement applying with the technology of basin modeling, it is founded that the time of generate and exclude hydrocarbon is between the Member Four of Shahejie Formation sediment telophase and Dongying sediment telophase.The sedimentary environment and the source of organic matter in Dongying Depression are similar to Weibei Depression. The source rocks in both district has a degree potential to generate hydrocarbon so that can provide reservoir with enough oil.更多还原