环县-正宁地区长9暗色泥岩分布特征与生烃潜力分析  

Distribution Characteristics of Dark Mudstone and Analysis of Hydrocarbon Potential of Chang 9 in Huanxian-Zhengning

作　　者：吴应忠[1,2,3] 段毅[1,2] 徐丽[1,2,3] 赵阳[1,2,3] 马向贤[1,2] 曹喜喜 

机构地区：[1]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,甘肃兰州730000 [2]中国科学院油气资源研究重点实验室,甘肃兰州730000 [3]中国科学院大学,北京100049

出　　处：《新疆地质》2015年第3期388-392,共5页Xinjiang Geology

基　　金：国家自然科学基金项目(4147212141272125)资助

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6~40 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。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.

关 键 词：环县-正宁 暗色泥岩 分布特征 热模拟实验 生烃规律 

分 类 号：P618.13[天文地球—矿床学]