基于核磁和密度测井评价准噶尔盆地致密油烃源岩有机碳含量

摘要

有机碳含量（TOC）的定量计算是烃源岩评价的基础，在准噶尔盆地致密油领域，常规方法计算烃源岩有机碳含量的精度已经满足不了测井评价的需求。因此，研究了利用核磁和密度测井资料定量计算烃源岩有机碳含量的一种方法。该方法计算结果与岩心实测结果吻合较好，精度较高，应用效果较好，满足了致密油领域烃源岩测井评价的需求。为致密油领域烃源岩的有机碳含量定量计算提供了一种新的测井评价方法，也为潜力烃源岩发育区跟踪、储层预测和资源量估算提供了必要的技术支撑。%The quantitative calculation of total organic carbon (TOC) is the basis for evaluating hydrocarbon source rocks. In tight oilfield of Junggar basin, using the conventional method to calculate TOC of hydrocarbon source rocks can ’t meet the needs of log-ging evaluation. This paper mainly researched a method of quantitative calculating TOC by using nuclear magnetic logging (NML) and density logging (DEN). Having the benefits of good agreement with actual core logging results, high precision and good applica-tion effects, this method meets the demands of well logging evaluation of hydrocarbon source rocks in tight oilfield, thereby provid-ing a new logging evaluation method for quantitative calculation of TOC. Furthermore, this method provides necessary technical support for zone tracking of potential hydrocarbon source rocks, reservoir prediction and resource estimation.