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十万山盆地勘探程度较低 ,盆地内只有 3口探井 ,有利用价值的仅有万参 1井。此前对该盆地烃源岩演化评价有两种截然相反的观点 :一种观点认为该盆地主要烃源岩 (P2 、T1)分别处于凝析油 湿气演化阶段、生烃高峰 凝析油 湿气演化阶段 ;而法国ELF公司却认为盆地内所有烃源岩均处于过成熟演化阶段。为正确评价该盆地烃源岩热演化 ,避免露头样品因遭受氧化对准确测试烃源岩氧化程度的影响 ,共采集十万山盆地 8套烃源岩 2 0个地表样品及 2 7个浅井样品进行镜质组 (沥青 )反射率测试 ,结果认为泥盆系、石炭系及绝大部分二叠系烃源岩镜质组反射率高达 2 .0 %以上 ,已处于过成熟演化阶段 ,仅有局部二叠系样品处于凝析油 湿气演化阶段晚期 ,而三叠系烃源岩正处于生烃高峰至凝析油 湿气演化阶段。
The exploration level of the Shiwanshan Basin is relatively low. There are only 3 exploration wells in the basin, and there is only Wanshan 1 well in use value. Previously, there were two diametrically opposite views on the evolution of source rocks in the basin. One view is that the major source rocks (P2, T1) in the basin are in the condensate oil moisture evolution stage, the hydrocarbon generation peak condensate moisture Evolution stage; while the French company ELF believes that all the source rocks in the basin are in the stage of over-mature evolution. In order to correctly evaluate the thermal evolution of source rocks in this basin and avoid the influence of outcrops on the degree of oxidation of the source rock due to oxidation, 20 surface samples from 8 sets of source rocks and 27 shallow samples The vitrinite (bitumen) reflectivity test showed that the vitrinite reflectance of Devonian, Carboniferous and most Permian source rocks was as high as 2.0% The Permian samples are in the late stage of condensate oil moisture evolution, while the Triassic source rocks are at the peak of hydrocarbon generation to condensate oil moisture evolution.