渤海湾盆地北部中、新元古界烃源岩评价

发布时间：2018-05-10 08:41

  本文选题：中、新元古界 + 烃源岩　； 参考：《东北石油大学》2017年硕士论文

【摘要】：渤海湾盆地是中国东部富含油气资源的大型盆地,北部广泛发育中、新元古界的长城系、蓟县系和青白口系地层,地层厚度大,研究潜力巨大。渤海湾盆地北部的中、新元古界海相碳酸盐岩分布广泛,且沉积岩层巨厚,对碳酸盐岩作为烃源岩的研究具有极其重要的经济价值和社会效益。由于本区勘探程度较低,缺失井下资料数据,本论文旨在根据野外露头资料和综合前人研究资料对渤海湾盆地北部中、新元古界烃源岩进行综合评价,为研究该区深层的油气藏成藏条件和勘探潜力奠定基础。在渤海湾盆地北部中、新元古界露头区选取了75块中、新元古界野外烃源岩分析样品,进行了总有机碳、全岩显微组分鉴定和岩石热解分析等项目,并利用气相色谱-质谱对烃源岩氯仿抽提物及重要生物标识化合物展开了定性与定量检测。渤海湾盆地北部中、新元古界地层发育,烃源岩主要为黑色、灰黑色页岩和海相碳酸盐岩。综合前人研究成果和本区烃源岩实际情况,将本区页岩烃源岩有机质丰度下限定为0.3%,碳酸盐岩烃源岩丰度下限定为0.15%。综合评价来看,本区中、新元古界下马岭组、铁岭组、洪水庄组页岩为好烃源岩,高于庄组和雾迷山组碳酸盐岩评价为差烃源岩,但由于雾迷山组地层巨厚,仍具有一定的生烃潜力。本区烃源岩生物标志化合物种类繁多,根据饱和烃生物标志化合物分析结果表明,中、新元古界烃源岩的有机质主要源于菌藻类低等生物,有机质类型较好,多为Ⅰ-Ⅱ1型,中、晚元古代藻类浮游植物的繁盛和细菌的强烈活动是中、上元古界烃源岩有机质生源构成的重要前提和物质基础。冀中北部中、新元古界生烃量远大于冀北地区。
[Abstract]:Bohai Bay Basin is a large basin rich in oil and gas resources in eastern China. The the Great Wall system, Jixian system and Qingbakou system of Neoproterozoic are widely developed in the north of China. The Mesoproterozoic marine carbonate rocks in the northern part of Bohai Bay Basin are widely distributed and the sedimentary rocks are very thick, which is of great economic and social value to the study of carbonate rocks as hydrocarbon source rocks. Due to the low level of exploration and the lack of underground data, this paper aims at synthetically evaluating the source rocks of the Neoproterozoic in the northern part of Bohai Bay Basin based on outcrop data and comprehensive previous research data. It lays a foundation for studying the reservoir forming conditions and exploration potential of deep reservoirs in this area. In the northern Bohai Bay Basin, 75 samples of the Neoproterozoic outcrop were selected to analyze the source rocks of the Neoproterozoic, and the total organic carbon (TOC), whole rock macerals and pyrolysis analysis were carried out. The chloroform extracts and important biomarkers of source rock were detected qualitatively and quantitatively by gas chromatography-mass spectrometry. Neoproterozoic strata developed in the northern Bohai Bay Basin, and the source rocks are mainly black, gray and black shale and marine carbonate rocks. Based on the previous research results and the actual situation of source rocks in this area, the organic matter abundance of shale source rocks in this area is limited to 0.3 and that of carbonate source rocks to 0.15. According to the comprehensive evaluation, the shale rocks of the Lower Maling formation, Tieling formation and Hongzhuang formation in the Neoproterozoic are good source rocks, which are higher than those of carbonate rocks of Zhuang formation and Wumishan formation, but the formation of Wumishan formation is very thick. It still has some hydrocarbon generating potential. According to the analysis of saturated hydrocarbon biomarkers, the organic matter of the Mesoproterozoic source rocks is mainly derived from the low organisms of bacteria and algae, and the type of organic matter is good, most of which are 鈪，

本文编号：1868621