摘要
如何解决PDC钻头钻井条件下岩屑细碎甚至呈粉末状给岩屑录井带来的困难已成为录井行业急待解决的问题。该文作者结合录井工作实践,大胆借鉴有关测井理论,提出了一种全新录井技术岩屑自然伽马录井技术;阐述了岩屑自然伽马录井理论与实验方法,给出了具体实验数据和结果,并与电测数据进行了对比。通过实践表明,该岩屑自然伽马录井方法与电测自然伽马相比具有较好的一致性,对于今后解决细碎岩屑录井识别岩性问题,提供了理论依据,且增加了岩屑录井识别岩性的手段。
On the condition of PDC bit drilling,how to overcome the difficulty in the cutting description with the fine or powder cuttings has become an urgent problem.Combining with the mud logging practice and using the related logging theory boldly,the author advanced a completely new concept-cutting natural gamma logging technical method,expounded the theory and experimental methods of cutting natural gamma logging,submitted specific experimental data and results and compared them with wireline logging data.The practice indicates that comparison between cutting natural gamma logging and wireline logging natural gamma has a better consistency,it provides a theoretical basis for further resolving the problem of using fine cutting logging to identify lithology and increases the means of using cutting logging to identify lithology.
