利用核磁共振测井资料进行烃源岩评价

Evaluating hydrocarbon source rock by making use of NMR log data

烃源岩的孔隙度和饱和度是烃源岩生烃和排烃作用评价的重要参数 ,求取它们是评价的难点 .作者发现可以利用核磁共振测井资料求得烃源岩的孔隙度和饱和度 ,再利用核磁共振测井与常规测井资料的对应关系 ,通过数值分析的方法求取烃源岩的这两个参数 .

It is a difficult problem in the evaluation of hydrocarbon source rock to get the porosity and saturation of hydrocarbon source rock. The authors put forward a method for obtaining the two parameters of hydrocarbon source rock: porosity-depth and water saturation-depth data of a well in some area are obtained by means of NMR log, and based on the correspondence relationship between NMR log data and conventional log data, the formulas for solving the two parameters of hydrocarbon source rock can be obtained through numerical analysis method. The porosity and saturation of the hydrocarbon source rock in this area can be calculated by using the two formulas. This method improves the accuracy and the efficiency of evaluating hydrocarbon source rock.