我不是专家,倒是想通过讨论学习一下。
建议楼主下次贴测井曲线的时候,把各曲线scale 贴出来。
曲线从左开始,我猜是GR, SP, 岩性,电阻率, density? 。后面几条不知道是什么曲线。
从GR和SP上看,楼主贴出来的层段,主要岩性是shale 或silty shale.
Organic carbon is usually associated with shales or silty shales, but may be present in relatively clean siltstone, sandstone, and carbonate rocks. If a source rock has not been exposed to temperatures of about 100 °C, it is termed a potential source rock. If generation and expulsion of oil or gas have occurred, it is termed an actual source rock.
我认为之所以有油气显示,是因为这段页岩已经达到thermal mature,开始产生油气。但是还没有进行到大量油气产生、运移阶段。