元素录井技术在兴古X断块古潜山岩性识别和界面卡取中的应用

为了解决兴古X断块古潜山火成岩识别和潜山界面卡取的难题,长城钻探录井公司在该区开展了X射线荧光元素录井试验研究。采用X射线荧光元素录井仪器对该区50多口井进行了元素分析,获得了几十万条岩屑的元素含量数据,通过统计和筛选,建立了该区各类岩石的元素含量数据库,并对这些数据进行了分析,归纳总结出了该区常见岩石的元素特征,建立了该区各类岩石的主要元素标准曲线、火成岩解释评价图板以及古潜山界面的识别方法。多口井的实钻验证表明,解释评价图板和古潜山识别方法有较好的应用效果,特别是对潜山界面的卡取、潜山内幕特殊岩性的识别提供了定量化的数据支撑和评价依据,为辽河油田古潜山油气藏的勘探开发提供了技术保障。

Application of element logging technology of identifying lithology and interface in buried hill of X Fault Xinggu

To solve the problem of identifying igneous rock and interface of buried hill in X Fault Xinggu,GWDC Mud Logging Company carried out the experimental study of X-ray fluorescence elemental logging in the area.X-ray fluorescence element logging equipment was used to make elemental analysis for more than 50 wells in this area,hundreds of thousands of element content data of cuttings were obtained,a database of element content of various rocks from this area was established through statistics and screening.The author analyzed these data,summarized the element characteristics of the common rocks in this area and set up the standard curves of the main elements from various rocks,igneous rock interpretation and evaluation chart and identification methods for the buried hill interface.The actual verification from drilling lots of wells showed that interpretation and evaluation chart and the method of identifying buried hills had good application effects,especially provided quantitative data support and evaluation basis for identifying the interface of buried hills and the special lithology of inner buried hills,and technical support for explorating and developing oil and gas reservoirs of the buried hills in Liaohe Oilfield.