论文详情
迪北地区侏罗系为一套陆相含煤沉积，主要储集层为阿合组，煤层与目的层上下压力系数差异大，可能导致压差卡钻或恶性井漏卡钻。因此，阿合组顶界面的准确识别是地质卡层的关键。根据岩屑元素含量与矿物间相关性分析，建立了基于单井的砂岩、泥岩、煤层的识别标准，并总结关键层位确定方法（曲线特征、砂岩元素特征）。现场应用表明，岩性识别的准确性高，阿合组顶界面卡取效果好。依托XRF元素录井技术，能快速、准确识别岩性，具有一定的推广应用价值。
The Jurassic in Dibei area is a set of terrestrial coal-bearing deposits, and the main reservoir is Ahe Formation. The great difference of pressure coefficients between the target bed and its upper and lower coal seam may lead to pressure differential sticking or malignant loss sticking. Therefore, the key to geological determination of strata is to accurately identify the top boundary of Ahe Formation. According to the analysis of the correlation between the content of elements in cuttings and minerals, the paper establishes the discriminant criteria of sandstone, mudstone and coal seams based on single well, and key layer determination methods (such as curve characteristics, sandstone element characteristics) are summarized. Field application shows that not only lithology identification is more accurate, and the determination for the top boundary of Ahe Formation is better. Relying on XRF element logging technology, lithology can be identified quickly and accurately, which has certain promotion and application value.