南盘江坳陷烃源岩特征及找气方向  

The characteristic of hydrocarbon source rocks and the gas exploration direction in Nanpanjiang depression

作　　者：王志[1] 江卫兵[1] 李钟枢 刘文泉[1] 李俊 郑兴 邝国墩 WANG Zhi;JIANG Weibing;LI Zhongshu;LIU Wenquan;LI Jun;ZHENG Xing;KUANG Guodun(Research Institute No.290,CNNC,Shaoguasn,Guangdong 512029,China;Guangxi geology survey institute,Nanning 530023,China)

机构地区：[1]核工业二九〇研究所,广东韶关512029 [2]广西地质调查院,南宁530023

出　　处：《世界核地质科学》2021年第3期343-350,共8页World Nuclear Geoscience

基　　金：中国地质调查局项目(编号:[2015]01-04-03-001-04)资助。

摘　　要：南盘江坳陷发现多处油气显示,指示较好油气资源潜力。桂西“田地1井”位于南盘江坳陷中南部的潞城凹陷,通过对该地区烃源岩进行系统取样、地化录井数据分析,并与中北部邻近的“秧1井”、“双1井”进行对比,结果表明,中石炭统黄龙组TOC范围为0.135%~0.825%,多数大于0.5%,平均0.633%,为本地区新发现的有效烃源岩地层,其干酪根类型主要为混合型及腐植型,总体烃源岩热演化程度高,已进入过成熟阶段,表明该地区已经具备良好找气条件。有效烃源岩地层叠加晚三叠世末期后形成的封闭构造的地段为南盘江坳陷田林地区下一步油气勘查的方向。The overall thermal evolution degree of source rock in Nanpanjiang depression is high,and oil and gas have been found in many places.“Tiandi well No.1”is located in Lucheng sag in the middlesouth of Nanpanjiang depression,Based on the systematic sampling of the well and the analysis of geochemical logging data the characteristics of source rock in this area were studied,and comparative analyzed with“Yang well No.1”and“Shuang wells No.1”.The TOC range of Middle Carboniferous Huanglong formation was found between 0.135%~0.825%,most of which are higher than 0.5%,with an average of 0.633%.It is a newly discovered effective source rock formation in this area.The kerogen types are mainly mixed and humic,the Nanpanjiang depression thermal evolution degree is high,which has entered a mature stage.The study showed that this area are with good conditions in gas exploration.The places where the effective source rock strata superimposed by thestructure trap formed after the end of Late Triassic is the next direction for oil and gas exploration in Tianlin area of Nanpanjiang depression.

关 键 词：南盘江坳陷 烃源岩特征 热演化 找气方向 

分 类 号：P618.13[天文地球—矿床学]