录井技术在AS1井页岩油气解释评价中的应用

AS1井位于南襄盆地泌阳凹陷深凹区,是一口以寻找页岩气为主要目的的风险探井,钻探结果证实该区页岩发育、页岩层段气测异常明显。通过对该井岩屑、岩石热解等录井资料细致分析后认为,页岩地层有机质含量、有机质丰度及厚度均满足美国富气页岩条件,但有机质成熟度处于生油阶段,结合气测录井资料,判断该井页岩地层不具气层特征,而具有油层特征。通过分析常规地质、气测、岩石热解、核磁共振各项资料后认为:2 438.0~2 540.0 m井段是最有希望获得工业油流的井段,后经压裂获工业油流。通过各种录井技术在AS 1井的应用分析可以看出:录井技术在一定程度上能够较好地评价页(泥)岩油气显示,但也存在一定的不足,只能依据钻时获得可钻性来判断砂质含量的相对高低,不能定量判断不同元素的含量,不能为压裂改造提供依据。

Applications of mud logging technique in shale oil-gas interpretation and evaluation of Well AS 1

Well AS 1 is a risk exploration well which takes to find gas from the gas layers of shale as a primary purpose,the actual drilling results confirmed that the shale of this region is developed,and gas logging abnormity of shale intervals is obvious.Through making a fine analysis on cutting,geochemical and other mud logging data of Well AS 1,the author thought that the content of organic matter,the abundance and thickness of shale formations meet the conditions of U.S.gas-rich shale,but the maturity of organi...