内蒙古突泉盆地中-下侏罗统烃源岩生烃潜力分析——以ZK-WJT井、ZK-13井为例

Analysis of Hydrocarbon Genetic Potential in the Middle-lower Jurassic in Tuquan Basin of Inner Mongolia——A Case Study of Well ZK-WJT and Well ZK-13

通过对突泉盆地内ZK-WJT井红旗组(Jh)和ZK-13井万宝组(Jw)烃源岩的发育特征和有机质丰度、类型及成熟度的研究对比表明:Jh和Jw烃源岩较为发育,2套生烃层系中有机质丰度较高,均具备一定的生烃潜力;烃源岩有机质类型均属于Ⅱ、Ⅲ型,其中Jh烃源岩有机质类型以Ⅱ型为主;烃源岩有机质演化程度较高,均处于成熟-高成熟演化阶段。综合评价认为,突泉盆地Jh和Jw均具备一定的生烃潜力,相较而言,Jh生烃潜力优于Jw。

There were two sets of Mesozoic hydrocarbon generation:the middle Jurassic Wanbao Formation(Jw)in Well ZK-13 and the lower Jurassic Hongqi Formation(Jh)in Well ZK-WJT.Based on the study of the characteristics of source rock development,organic matter abundance and its maturity,it was considered that the source rock was more development in Jh and Jw,organic matter abundance was higher in the 2sets of hydrocarbon genetic strata they had certain hydrocarbon genetic potential forces,the organic matter type was of Type Ⅱand Ⅲ.The organic matter type of Hongqi Formation was mainly TypeⅡ with higher evolution level of organic matter,they were at a matured-highly matured stage.The integrated analysis shows that both Jh and Jw have certain hydrocarbon genetic potential,relatively speaking,the hydrocarbon genetic potential is more favorable in Jh than that of Jw.