摘要
钻时是地质录井现场地层岩性划分和层位卡取最重要的依据之一。为增强钻时的可比性,提出一种新的钻时变换方法,该方法以dc指数公式所蕴含的钻井参数之间的函数关系作为钻时变换的理论依据,根据dc指数公式推导出钻时变换公式,对钻时进行变换。胜利油田是典型的断块油气田,地质条件复杂,因而选取该油田较为典型的KDX 414井作为例证进行探讨。结果表明:同实际钻时相比,不同深度或不同岩性之间的变换钻时差异性明显,与录井岩屑剖面和测井曲线的符合性更高,尤其对砂、泥岩地层岩性的划分和对油气储集层深度与厚度的确定更加准确,且变换钻时与dc指数的相关性有明显提高。
Drilling time is one of the most important bases for formation lithology classification and determining horizons at geological logging site.To enhance the comparability of drilling time,the author proposed a new drilling time conversion method,the method uses the functional relationship of the inherent drilling parameters in dcindex formula as a theoretical basis for drilling time conversion.First,deduce the conversion equation of drilling time according to dcindex formula,then use it to convert drilling time.Shengli Oilfield is a typical fault block of oil &gas field with complex geological conditions,well KDX414was selected as a typical example to discuss.The results indicated that compared with the actual drilling time,the difference in drilling time conversions at different depths or different lithologies were obvious and conformed with mud logging cutting profile and wireline logging curves,more acccurately devided the lithology of sand and mudstone formation and determined the hydrocarbon reservoir depth and thickness,and drilling time conversions can improve the correlation with dcindex significantly.
出处
《录井工程》
2014年第1期16-20,90,共5页
Mud Logging Engineering
