【作者】 吴应忠； 段毅； 徐丽； 赵阳； 马向贤； 曹喜喜；

【Author】 Wu Yingzhong;Duan Yi;Xu Li;Zhao Yang;Ma Xiangxian;Cao Xixi;Key Laboratory of Petroleum Resources Research,Gansu Province;Key Laboratory of Research,Institute of Geology and Geophysics,Chinese Academy of Sciences;University of Chineses Academy of Sciences;

【机构】 甘肃省油气资源研究重点实验室中国科学院地质与地球物理研究所兰州油气资源研究中心； 中国科学院油气资源研究重点实验室； 中国科学院大学；

【摘要】 通过对盆地115口井测井资料统计与处理,研究环县-正宁地区长9暗色泥岩分布特征。研究区长9₁泥岩厚度和分布面积大于长9₂;泥岩厚6⁴0 m,最高70 m;较厚泥岩分布于固城-塔儿湾和庆阳-马岭地区。据研究区泥岩厚度和平均有机碳含量,将研究区长9烃源岩分布划分为4个区块。通过热模拟实验,分析研究区长9暗色泥岩生烃潜力。随着温度增加,气态烃和液态烃产率都逐渐升高。气态烃产率在350℃时出现急剧增加,450℃时达463kg/t.TOC;350℃时液态烃产率达最高值,为70.7 kg/t.TOC,之后液态烃产率随着温度增加而减少。总烃产率在350℃时迅速增长,450℃时达469.7 kg/t.TOC。通过与其他地区烃源岩生烃参数对比研究,认为长9暗色泥岩具较好生烃潜力。更多还原

【Abstract】 Based on 115 wells logging data statistics and processing,distribution characteristics of dark mudstone of Chang 9 was studied.Mudstone of Chang 9₁ thickness and distributed area are greater than Chang 9₂ in the study area,distribution of mudstone thickness is in an average of 6 to 40 m,up to 70 m;Thicker mudstone areas are in Gucheng-Taerwan and Qingyang-Maling;According to mudstone thickness and average organic carbon content in the study area,the distribution of hydrocarbon source rock of Chang 9 in the study area is divided into four blocks.These areas are Taibailiang-Qingyang,Gucheng-Taerwan and Qingyang-Maling,Heshui,Zhengning.Based on the thermal simulation experiment,determined hydrocarbon potential of Chang 9 dark mudstone in the study area.With the increasing of temperature,gaseous hydrocarbon and liquid hydrocarbon production rate were increased.Gaseous hydrocarbon production rate at350℃ increased in a sharp,in 450 ℃ up to 463 kg/t.TOC;At 350℃,the liquid hydrocarbon production rate reached the peak（70.7 kg/t.TOC）,then the liquid hydrocarbon production rate decreased with the increasing of temperature;Total hydrocarbon production rate rapidly growed in 350℃,at 450℃ up to 469.7 kg/t.TOC.Through the comparision of Hydrocarbon generation parameter of Chang 9 dark mudstone in study area with other source rocks,Chang 9 reservoir group has better potential in hydrocarbon generation of source rock in the study area.更多还原