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辽河太古界潜山地层岩性复杂,测井评价难度大。元素俘获测井(ECS)是一种将测井技术与岩石学直接联系起来的先进测井技术,通过化学源向地层中发射4兆电子伏特的快中子,测量记录非弹性散射γ射线和热中子辐射俘获核反应散射γ射线,经过解释处理,提供地层中Si、Ca、Fe、S、Ti、Gd等主要化学元素的含量。在岩心取样化验分析、岩石定名的基础上,利用测井资料,对太古界变质岩潜山进行岩石测井分类,应用ECS测井资料,与常规测井资料结合,进行岩性识别、求取地层孔隙度及划分潜山内幕,应用于太古界潜山地层测井评价,取得了较好的应用效果。
The lithology of the Archean buried hill strata in Liaohe River is complex and the logging evaluation is very difficult. Element-trapping logging (ECS) is an advanced logging technique that directly correlates well logging with petrology by emitting 4 mega-volts fast neutrons into the formation via chemical sources, measuring and recording inelastic scattering gamma rays and The thermal neutron radiation traps the nuclear reaction to scatter the γ-rays, and after the explanation and processing, the contents of the major chemical elements such as Si, Ca, Fe, S, Ti and Gd in the formation are provided. Based on core sample analysis and rock naming, we use well logging data to conduct petrophysical logging of metamorphic rock buried hills in the Archean. Using ECS logging data and combining with conventional well logging data, lithology identification Stratigraphic porosity and subdivision of buried hill, it is applied to well logging evaluation in the Archean buried hill and has achieved good application results.