摘要
利用最近钻探的几口页岩油探井资料,开展苏北盆地高邮凹陷花庄地区古近系阜宁组二段烃源岩有机地化特征和含油性研究。通过对有机碳含量、氯仿沥青“A”、总烃含量和生烃潜量(S_(1)+S_(2))等指标的分级评价,以及对干酪根显微组分、镜质体反射率(R_(o))、岩石热解最高峰温(T_(max))、正构烷烃分布和生物标志物组成等参数分析,有机质丰度总体上达到好烃源岩-优质烃源岩标准;有机质类型主要为Ⅰ型、Ⅱ_(1)型和Ⅱ_(2)型,且从下往上,有机质类型变好;有机质成熟度总体到达成熟—高成熟阶段。采用两种方法(游离油含量法和含油饱和指数法)对花庄地区阜二段烃源岩含油性进行评价,认为其含油性到达Ⅰ类或Ⅱ类标准,具有较大的勘探潜力。研究结果对高邮凹陷下一步页岩油勘探地质甜点的选择起到一定的指导作用。
Using the data from several recently drilled shale oil exploration wells,we carried out a study on the organic geochemical characteristics and oil-bearing properties of source rocks in the second member of the Paleogene Funing Formation in the Huazhuang area of the Gaoyou Sag in the Subei Basin.Through the classification evaluation of organic carbon content,chloroform asphalt"A",total hydrocarbon content,and hydrocarbon generation potential(S_(1)+S_(2)),as well as the analysis of parameters such as kerogen macerals,vitrinite reflectance(R_(o)),rock pyrolysis peak temperature(T_(max)),normal paraffin distribution,and biomarker composition,etc.In general,the abundance of organic matter reaches the standard of good-quality hydrocarbon source rock.The organic matter types are mainly Type Ⅰ,Type Ⅱ_(1),and Type Ⅱ_(2),and the organic matter types become better from the bottom to the top.The maturity of organic matter reaches the stage of maturity and high maturity in general.Two methods(free oil content method and oil saturation index method)are used to evaluate the oil content of the hydrocarbon source rock of the second member of the Funing Formation in the Huazhuang area,and it is considered that the oil content reaches the standard of Class Ⅰ or Class Ⅱ,and it has a great potential for exploration.The results of this study will play a guiding role in the selection of geological desserts for the next shale oil exploration in Gaoyou Sag.
作者
罗义
邢玉洁
LUO Yi;XING Yujie(Exploration and Development Research Institute of Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China)
出处
《复杂油气藏》
2024年第3期304-308,334,共6页
Complex Hydrocarbon Reservoirs
基金
中国石化科技部项目“苏北盆地陆相页岩油富集条件与勘探评价研究”(P21113)。
关键词
烃源岩
有机质
地化特征
游离烃含量
阜二段
高邮凹陷
source rock
organic matter
geochemical characteristics
free oil content
the second member of Funing Formation
Gaoyou Sag
