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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。
AS1 is located in the deep concave area of Biyang depression of Nanxiang Basin and is a risk exploration well with the main purpose of looking for shale gas. The drilling results confirm the shale development in this area and the gas measurement in shale intervals is obviously abnormal. Through careful analysis of well logging data such as cuttings and pyrolysis of the rock, it is considered that the organic matter content, abundance and thickness of organic matter in shale meet the conditions of rich gas shale in the United States. However, the maturity of organic matter is in the stage of oil production, Logging data to determine the shale formation is not characterized by gas reservoirs, but with reservoir characteristics. By analyzing the conventional geology, gas measurements, pyrolysis of rocks and NMR data, it is considered that the section from 2 438.0 to 2 540.0 m is the most promising section for obtaining industrial oil flow and after that, the industrial oil flow is fractured. Through the application analysis of well logging technology in well AS 1, it can be seen that mud logging technology can well evaluate the oil and gas display of page mud (mudstone) to a certain degree, but there are some shortcomings, which can only be obtained by drilling Drillability to determine the relative level of sandy content, can not quantitatively determine the content of different elements, can not provide a basis for fracturing.