广东三水盆地布心组烃源岩干酪根类型  

作　　者：唐鑫萍[1] 

机构地区：[1]中国石油大港油田公司勘探开发研究院,天津300280

出　　处：《科技创新与应用》2021年第7期124-126,共3页Technology Innovation and Application

基　　金：中石油科技项目(编号:NFKT-2017-SSXMB-005)资助。

摘　　要：为明确三水盆地布心组烃源岩干酪根类型,文章以布二段和布三段的暗色泥岩烃源岩为研究对象,综合运用显微组分分析和元素分析的方法开展干酪根类型专门研究。取得了以下几点结论。(1)布二段烃源岩干酪根样品中平均的腐泥组、壳质组、镜质组、惰质组分别占58%、10%、21%、11%,干酪根类型指数值36.25;布三段烃源岩干酪根样品中平均的腐泥组、壳质组、镜质组、惰质组分别占37%、15%、33%、15%,干酪根类型指数值4.75。(2)元素分析表明,布二段和布三段的烃源岩干酪根类型有一定差异,布二段干酪根为Ⅱ_1-Ⅱ_2型;布三段干酪根主要为Ⅱ_2型、少量Ⅲ型。(3)综合显微组分分析和元素分析2种方法研究成果,分析认为,布二段具有较多腐泥组、布三段具有较多镜质组是造成布二段和布三段干酪根类型差异的原因。研究成果可为该区石油地质研究提供参考。In order to clarify the kerogen type of Buxin formation source rocks in Sanshui Basin,this paper takes the dark mudstone source rocks of the second and third members of Buxin formation as the research object,and comprehensively uses the methods of micro component analysis and element analysis to carry out the special study of kerogen types.The following conclusions are obtained:(1)The average sapropelic,exinite,vitrinite and inertinite were 58%,10%,21%and 11%respectively.The kerogen type index was 36.25.The average contents of humic group and kerogen group are 15%and 15%respectively.The kerogen type index was 4.75;(2)The element analysis shows that there are some differences in kerogen types between the second and third member of Buxin formation.The kerogen of the second member belongs to typeⅡ1-Ⅱ2.The kerogen of the third member is mainly typeⅡ2 and a small amount of typeⅢ;(3)Based on the research results of maceral analysis and element analysis,it is considered that there are more sapropelic groups in the second member and more vitrinite in the third member,which is the reason for the difference of kerogen types between the second and third members.The research results can provide reference for petroleum geology research in this area.

关 键 词：烃源岩 干酪根类型 干酪根显微组分 干酪根元素分析 布心组 三水盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]